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  EPSON TERMINAL PRINTER LX-1050 + SERVICE MANUAL EPSON 400328 3 ,’ ,,[…]

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  NOTICE All rights reserved. Reproduction of any part of this manual in any form whatsoever without SEIKO EPSON’s express written permission is forbidden. The contents of this manual are subjects to change without notice. All efforts have been made to ensure theaccuracyof the contents of this manuaI. However, should any errors be detected, SEIKO E[…]

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  PRECAUTIONS Precautionary notations throughout the text are categorized relative to 1) personal inju~ and 2) damage to equipment. DANGER Signals a precaution which, if ignored, could result in serious or fatal personal injury. Great caution should be exercised in performing procedures preceded by DANGER Headings. WARNING Signals a precaution which,[…]

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  PREFACE This manual describes functions, theory of electrical and mechanical operations, maintenance, and repair of LX-105O+. The instructions and procedures included herein are intended for the experience repair technician, and attention should be given to the precautions on the preceding page. The chapters are organized as follows: CHAPTER 1. GEN[…]

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  REVISION SHEET Revision Issue Date Revision Page Rev. A May 18, 1994 1st issue -v-[…]

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  TABLE OF CONTENTS CHAPTER 1. CHAPTER 2. CHAPTER 3. CHAPTER 4. CHAPTER 5. CHAPTER 6. APPENDIX GENERAL DESCRIPTION OPERATING PRINCIPLES DISASSEMBLY AND ASSEMBLY ADJUSTMENTS TROUBLESHOOTING MAINTENANCE — vi -[…]

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  Chapter 1 General Description Table of Contents 1.1 FEATURES 1-1 1.2 SPECIFICATIONS 1-3 1.2.1 1.2.2 1.2.3 1.2.4 1.2.5 1.2.6 1.2.7 1.2.8 1.2.9 Printing Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Paper Handling Specification. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Paper Speci[…]

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  List of Tables Table 1-1. Options for LX-105O+ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 Table 1-2. Print Speed and Printable Columns . . . . . . . . . . . . . . . . . . . . . . . . . l-s Table l-3. CharacterTables. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I-A Table Table Table […]

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  LX-105O+ Service Manual General Description 1.1 FEATURES The LX-105O+ is a small, light-weight, low-cost, advanced paper handling printer. Its main features are: c1 Q Ci c1 c1 The LX-105O+ has four Standard version: India version: Russian version: Latin version: South Europe version: versions. Different parts are Program ROM version only. ROM versi[…]

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  General Description LX-105O+ Service Manual Table 1-1 lists the optional units available for the LX-1050+. Table 1-1. Options for LX-105O+ Cat. No. Description 8143 New Serial Interface Board C82302*/C82304* 32KB Serial Interface C82303* 32KB Parallel Interface 8165 IEEE-488 Interface Board C80624* Single Bin Cut Sheet Feeder i C80014* [ PullTracto[…]

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  LX-105O+ Service Manual General Description 1.2 SPECIFICATIONS This section provides detailed statistics for this printer. 1.2.1 Printing Specification Printing Method: Serial, impact, dot matrix Pin Configuration: 9 wires (diameter 0.29rnm) #1 #2 #3 #4 #5 #8 #7 #8 #9 b 0.29 mm &—=- 0.35 mm(l/72”) Figure 1-2. I Pin Configuration Print direct[…]

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  General Description LX-105O+ Service Manual lot matrix format: 9 X 9 Text mode (Draft) 18X 20 Text mode (NLQ Ytaracter sets: ~haracter tables: 13 international character sets See Table 1-3. Table 1-3. Character Tables SW)ck[d India l?~su~ln Latin South Character Table Model Model E$;mg~ ITALIC o 0 0 0 0 PC437 (US/ Standard Europe) o 000 0 PC850 (Mu[…]

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  LX-105O+ Service Manual General Description 1.2.2 Paper Handling Specification Line spacing: 1/6 inch or 1/8 inch, or progr ammable in units of 1/216 inch Line feed speed: Approximately 95 ms (1/6 inch line feed) Approximately 75 ms (1/6 inch in page feed) Paper feed method: Friction feed Tractor feed (push tractor: standard, pull tractor: optional[…]

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  General Description LX-105O+ Service Manual 13 mm min. Continuous paper I 345.4 mm max. ➤ o 0 0 0 I Printable area 4—D o 0 0 0 0 .———————————— c1 0 0 0 n u 0 0 0 13 mm min. Adjust lever settings Figure 1-4. Printable Area — Continuous Paper The adjust lever must be set to the proper position for the paper thickness. Tabl[…]

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  LX-105O+ Service Manual General Description 1.2.4 Ink Ribbon Type: #8755 Ribbon Cartridge Color: Black Reliability: 3 million characters at 14 dots/character 1.2.5 Environmental Conditions Temperature: -30 to60“C — Storage 5to35“C — Operation Humidity: 5 to 85 YO RH (no condensation) — Storage 10to801%0 RH (no condensation) — Operation Resistan[…]

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  General Description LX-105O+ Service Manual 1.3 INTERFACE OVERVIEW Centronics parallel interface Optional Type A interface Parallel InterFace The LX-105O+ is equipped with the following external interfaces; ■ ■ 1.3.1 Data Format 8-bit parallel Synchronization By STROBE pulse Handshaking By BUSY and ACKNLG signal Signal Level Ill-compatible Adap[…]

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  LX-105O+ Sewice Manual General Description —. . . . -. . — . . .- . . Table 1-6. Connector Pin Assignments and Signal Functions (Cont.) Pin No. Signal Name 1/0 Description This signal indicates whether paper is available in the 12 PE o printer or not. A HIGH level indicates a no paper condition. 13 SLCT o pulled up to +5V though 3.3KQ resistor […]

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  General Description LX-105O+ Service Manual 1.4 PRINTER OPERATIONS This section describes the basic operations of the printer. 1.4.1 Control Panel The control panel of this printer contains four non-lock type push buttons and four LED indicators for easy ope;ation of the various printer function. [Buttons] D POWER D READY 0 ON LINE m PAPER OUT OFF […]

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  LX-105O+ Service Manual General Description 1.4.2 SelecType Functions SelecType allows the user to choose fonts and the printing mode easily. This function provides for selection of Draft, Roman, or Saris Serif fonts and selection of normal printing or condensed printing modes. SelecType is effective only when the printer is ON LINE and not printin[…]

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  General Description L.X-1050+ Service Manual 1.4.5 DIP Switch Settings The two DIP switches are located on the side of the printer and function as shown in Tables 1-7 throum 1-10. Note that the status of the DIP switches is read only at power on or upon receipt of the INIT signal. Table 1-7. Settings for DIP Switch I I I I SW No. Description ON OFF[…]

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  LX-105O+ Service Manual General Description Table 1-9. Character Table Selection (DIP SW 1-5: ON) Sw 1-6 Sw 1-7 Sw 1-8 ~:pj:;d India :?:/:: Latin South version Version Europe Version I ON ON ON PC437 PC437 PC437 PC437 PC437 ON ON OFF PC850 PC437 PC866 PC852 PC857 ON OFF ON PC860 PC437 PC869 MAZOWIA ISO Lat. IT ON OFF OFF PC863 PC437 Bulgaria Code M[…]

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  General Description LX-105O+ Service Manual 1.4.6 Buzzer Operation The buzzer sounds under the following conditions: BEL code: Carriage trouble: PaperQut: Abnormal voltage: Incorrect SRAM: Incorrect RAMinside CPU: Recognition of panel operation: Factory setting: Sheet ejection failure (in CSF mode): Illegal paper release/ unrelease: The buzzer soun[…]

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  LX-105O+ Service Manual Ganeral Description 1.5 MAIN COMPONENTS The main components of the LX-105O+ printers are designed for easy removal and replacement to maintain/repair the printers. The main components are: Cl TAMA board: Main control board. The CPU on this board controls all main functions. D TAPNL-W control panel: Control panel. Cl TAa filt[…]

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  General Description LX-105O+ Service Manual 1.5.2 TAa Filter Unit The TAa filter unit contains a power cord (120V Version) or AC inlet (220/240V Version), power switch, fuse filter circuit, and power transformer. 120V Version Figure 1-9. TAa Filter Unit 220/240V Version 1.5.3 Printer Mechanism (M-3D60) The M-3D60 printer mechanism was developed spe[…]

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  Chapter 2 Operating Principles Table of Contents 2.1 OVERVIEW 2-1 2.2 OPERATING PRINCIPLES OF THE PRINTER MECHANISM 2-1 2.2.1 Printhead Printing Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2 2.2.2 Carriage Drive Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3 2.2.2.1 Home Posit[…]

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  List of Tables Table 2-1. Ribbon-Feed Gear Train. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7 Table 2-2. Voltage Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8 Table 2-3. Functionsofthe Main ICand Circutis . . . . . . . . . . . . . . . . . . . . . . . 2-10 Table 2-4. Phase-Excita[…]

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  LX-105O+ Service Manual Operating Principles 2.1 OVERVIEW This section describes the operating principles of the printer mechanism and the electrical circuits of the LX-105O+. 2.2 OPERATING PRINCIPLES OF THE PRINTER MECHANISM The LX-105O+ printer mechanism is composed of the printhead unit, paper feed mechanism, carriage drive mechanism, and variou[…]

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  Operating Principles LX-105O+ Service Manual 2.2.1 Printhead Printing Operation The dot-wire operation during printing is as follows. When the head-driving coil for a dot wire is energized, the actuating plate, which is engaged to one end of the dot wire, is attracted to the iron core, and drives the dot wire toward the platen. The dot wire forcefu[…]

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  LX-1050+ Service Manual Operating Principles 2.2.2 Carriage Drive Mechanism The carriage mechanism includes the printhead, the carriage, the timing belt, the carriage motor, and the platen. The timing belt is connected to the bottom of the carriage. The belt is driven by the carriage motor and moved via the beltdriven pulley. The printhead is mount[…]

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  Operating Principles LX-105O+ Service Manual 2.2.3 Paper Feed Mechanism Operation Friction feeding is used for cut sheets, and push tractor feeding is used for fanfold paper. Friction-Feed Operation The paper is held against the platen by paper-feed rollers. The paper-feed motor rotates the platen gear, via the paper-feed reduction gear, in the dir[…]

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  LX-105O+ Service Manual Operating Principles Push Tractor Feed Operation When the push tractor unit is used, the paper is set such that its holes mesh with the tractor pins along the tractor belt. The paper feed motor is driven and, via the pinion on the motor shaft, rotates the gears in the direction shown in following figure, rotating the tractor[…]

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  Operating Principles LX-105O+ Service Manual 2.2.3.1 Paper End Sensor Following figure show the paper end sensor. This sensor switch is ON when no paper is in place (e.g., when the paper supply has run out.). ~ Paper 2 “Paper present” Figure 2-7. Paper End Sensor Mechanism 2.2.3.2 Release Sensor The release sensor senses the position of the rel[…]

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  LX-105O+ Service Manual Operating Principles 2.2.4 Ribbon Advance Mechanism The ribbon-feed mechanism consists of the ribbon cartridge and the ribbon-feed section. The ribbondriving gear is always driven counterclockwise (regardless of the timing belt direction) via the gear trains shown in following table. Table 2-1. Ribbon-Feed Gear Train 1 I Dir[…]

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  Operating Principles LX-105O+ Service Manual 2.3 OPERATING PRINCIPLES OF THE ELECTRICAL CIRCUITRIES This section describes principles of electrical circuitries. 2.3.1 Operating Principles of the Power Supply Circuit The electrical power required by this mechanism is developed using the TAa Fiher Unit (which combines a filter and a power transformer[…]

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  LX-105O+ Service Manual Operating Principles 2.3.2 Operating Principles of the Main Control Circuit The printer CPU is an 8-bit CPU ~D7810HG running at 15 MHz. It oversees control of all the components of the printer. The E05A30 gate array contains various memory management functions that control the assignment of the memory and 1/0 areas. CPU vPD7[…]

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  Operating Principles LX-105O+ Service Manual Table 2-3. Functions of the Main IC and Circuits IC and Circuits Looation Functions Receives data from the host computer and loads the data to the input buffer in RAM. Expands the input data held in the buffer to vPD781 OHG 2C create image data. Loads this image data to the image buffer in RAM. Transfers[…]

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  LX-105O+ Service Manual Operating Principles 2.3.2.2 Sensor Circuit Following figure shows the sensor circuit in block diagram. The PAO of CPU port senses carriage home position. The PA1 senses paper end. The PA2 senses release lever position. The AN5 of CPU A/D convertor senses +24V line voltage. HOME PE RELEASE +24V line CPU PAO uPD7810HG (2C) PA[…]

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  Operating Principles LX-1050+ Service Manual 2.3.2.4 Paper Feed Motor Drive Circuit The paper-feed motor drive circuit is shown in following figure. me paper-feed motor is a step motor which can utilize 2-2 phase excitation. When the paper-feed signal PC2 is set to HIGH, Q20 and Q16 are turned on, and +24 V is supplied to the motor. When the paper-[…]

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  LX-105O+ Service Manual Operating Principles 2.3.2.5 Printhead Drive Circuit Gate array E05A30 is used as an 8-bit + l-bit data latch. The CPU determines the pulse width for the head-wire drive pulses from gate array E05A30 by monitoring the printhead drive power (+24 V line). The E05A30 gate array includes circuitry to interface the CPU and the pr[…]

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  Operating Principles LX-105O+ Service Manual 2.3.2.6 Host Interface The host interface circuit is shown in following figure. STROBE pulses from the host computer pass through the low-pass filter, consisting of R72 and C12, and flow into the STROBE terminal. These pulses latch the parallel data and set the BUSY signal HIGH, so that subsequent data t[…]

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  LX-105O+ Service Manual Operating Principles 2.3.2.7 EEPROM Circuit The EEPROM stores in its memory the current feed position of continuously fed paper, as well as the current panel settings. This memory is retained even after power is shut off. EEPROM can memorize the current position of continuously fed paper, so that this information can be main[…]

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  Chapter 3 Disassembly and Assembly Table of Contents 3.1 GENERAL REPAIR INFORMATION 3-1 3.2 DISASSEMBLY AND ASSEMBLY 3-2 3.2.1 Printhead Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2 3.2.2 Removal of Casing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4 3.2.2.1 U[…]

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  Figure 3-25. Paper Guide Plate Removal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-16 Figure3-26. Adjust l_everRernoval . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-17’ Figure 3-27. Tractor Frame l-Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-17 Figure 3-28. Extraction ofTractorunti .[…]

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  LX-105O+ Service Manual Disassembly and Assembly 3.1 GENERAL REPAIR INFORMATION This chapter describes the procedures for removin~ replacins and adjusting the main components of the LX-105O+. Prior to beginning any of these procedures, be certain that the AC power cord is disconnected. To help prevent hands jiotn being cut by the printer mechanism […]

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  Disassembly and Assembly LX-105O+ Service Manual 3.2 DISASSEMBLY AND ASSEMBLY This section details the disassembly procedures for the LX-105O+. As a rule, reassembly is performed by simply reversing the procedures; a number of special notes, however, are provided under the heading “Notes for Reassembly.” When a disassembly or reassembly procedu[…]

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  LX-105O+ Service Manual Disassembly and Assembly [Step 3] Unlock the two levers securing the printhead to thecarnage bypulhngthemdown. Then lift and remove the printhead. P Levers Figure 3-2. Printhead Removal [Step 4] Disconnect the head cable from theconnector ontheprinthead. Rev. A 3-3[…]

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  Disassembly and Assembly LX-105O+ Service Manual 3.2.2 Removal of Casing This section details the procedure for removing the upper casing and the control panel. 3.2.2.1 Upper Casing Removal [Step 1] [Step 2] [Step 3] [Step 4] Remove the sheet guide unit, printer cover, paper tension unit, and paper feed knob. Pull in the two notches securing the pu[…]

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  LX-105O+ Service Manual Disassembly and Assembly [Step 5] While lifting the upper casing, discomect the cable of the control panel from connector CN3 on the TAMA board. Then remove the upper casing. Figure 3-5. Upper Casing Removai -2 NOTE FOR REASSEMBLY: Before reassembling the upper casin& prepare the FFC (Flat Flexible Cable) that connects t[…]

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  Disassembly and Assembly LX-105O+ Service Manual 3.2.2.2 Control Panel Removal [Step 1] Remove the upper casing (as described in the previous section). [step 2] Turn the upper casing over, push in the two notches on the casing that are securing the control panel to it, and remove the control panel. ane l Figure 3-7. Control Panel Removal 3-6 Rev. A[…]

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  LX-105O+ Service Manual Disassembly and Assembly 3.2.3 Removal of Circuit Boards This section describes the procedure for removing the TAMA Board and the TA-a filter unit. 3.2.3.1 [Step 1] TAMA Board Removal Remove the upper casing (See section 3.2.2.1). The following connectors on the TAMA —- board, which are connecting it to external components[…]

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  Disassembly and Assembly LX-1050+ Service Manual 3.2.3.2 [Step 1] [Step 2] [Step 3] [Step 4] TA-a Filter Unit Removal Remove the upper casing (See section 3.2.2.1). Disconnect connector CN9 at the TAMA board. This comector comects the TA-a filter unit. Remove the C. B.(O) (M4 x screw securing the frame ground wire. Remove the two C. B.B-tite (M4[…]

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  LX-105O+ Service Manual Disassembly and Assembly 3.2.5 Disassembly of Printer Mechanism This section details the removal of components from the printer mechanism. 3.2.5.1 Removal of Carriage Motor [Step 1] Remove theprintermechanism (See section 3.2.4). [Step 2] Disconnect the motor cable from the carriage motor. [Step 3] Remove the belt tension sp[…]

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  Disassembly and Assembly LX-105O+ Service Manual 3.2.5.2 Removal of Home-Position Sensor [Step 1] Remove the printer mechanism. (See section3.2. [Step 2] Turn the printer mechanism upside-down. [Step 3] Push in the notch securing the home-position base frame. 4) sensor, and remove the sensor from the Notch HP Sensor Figure 3-13. Home-Position Senso[…]

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  LX-105O+ Service Manual Disassembly and Assembly 3.2.5.3 Removal of Platen [Step 1] Remove the printer mechanism. (See section 3.2.4) [Step2] Remove the paper tension unit. [Step3] Remove the C-ring (6) from the plate shaft. Crecent Ring Figure 3-14. Cresent Ring Removal [Step 4] Remove the two C.B.N.Stite (M3 x 6) screws securing the platen cover […]

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  Disassembly and Assembly LX-105O+ Service Manual 3.2.5.4 Separate of Frame [Step 1] Remove the platen. (See section 3.2.5.3) [Step 2] Remove the printhead. (See section 3.2.1) [Step3] Remove the FFC, head cable holder (L), and head cable holder (R) from base frame. Head Cable’ Hoder L Head Cable Hoder R Figure 3-16. Head Cable Holder and FFC Remo[…]

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  LX-105O+ Service Manual Disassembly and Assembly [Step 6] Push thetwonotches of the release lever outward. Remove the release lever. Figure 3-18. Release Lever Removal When the release lever is replaced, the markings should be analogously positioned. } Release Lever L o Marking f .’ Figure 3-19. Release Lever Replacement Rev. A 3-13[…]

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  Disassembly and Assembly LX-105O+ Service Manual [Step 7] Separate the tractor cancellation cum from paper feed lever cancellation shaft. an -2iiB Paw ,Tractor Disengage Cam Lever Drive Shaft Separation of Tractor Diseugage Cam [Step 8] Turn the printer mechanism upside-down, and manually move the carriage unit until it is at the cut-out section […]

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  LX-105O+ Service Manual Disassembly and Assembly [Step9] Remove the two C.B.S-tite. (0) (M3 x 6) screws which are securing the side frames to the base frame, and remove the side frames. Separate side frames from base frame. CBS(0) (M3~ 6) Screws Figure 3-22. Separate of Frame When the printer mechanism is separated, perform the following adjustment[…]

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  Disassembly and Assembly LX-105O+ Service Manual 3.2.5.6 [Step 1] [Step 2] [Step 3] 3.2.5.7 [Step 1] [Step 2] [Step 3] Removal of Paper End Sensor Separate side frames from base frame. (See section 3.2.5.4) Loosen the two bends securing the paper end sensor to the paper guide at the back of the printer. Remove the paper end sensor. Bends r Figure 3[…]

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  LX-105O+ Service Manual Disassembly and Assembly 3.2.5.8 Removal of Carriage [Step 1] %paratesideframes from base frame. (Seesection3.2.5 .4) [Step 2] Remove the HNO (M4) nut Securing theadjustlever, and remove the adjust lever. [Step 3] Remove the head adjust lever from thecarriage guide shaft. [Step 4] Remove thecarnageguide shaft and the carriag[…]

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  Disassembly and Assembly LX-105O+ Service Manual [Step 2] Remove the tractor set L, the paper support, and tractor set R from the tractor and sprocket guide shafts. 4- T7 5- Figure NOTES FOR REASSEMBLY: 3-28. Extraction of Tractor Set When reassembling, align the phases as shown below. /a ,- ‘,.-’, Figure 3-29. Tractor Phase Alignment 3-18 Rev.[…]

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  Chapter 4 Adjustments Table of Contents 4.1 ADJUSTMENTS 4-1 4.1.1 Carriage Motor Backlash Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1 4.1.2 Paper Feed Motor Backlash Adjustment. . . . . . . . . . . . . . . . . . . . . . . . . 4-2 4.1.3 Paten Gap Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . […]

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  LX-105O+ Service Manual Adjustments 4.1 ADJUSTMENTS This section describes the adjustment procedures necessary when the LX-105O+ printer is reassembled or when parts are reinstalled or replaced. These procedures are necessary to ensure the correct operation of the printer. 4.1.1 Carriage Motor Backlash Adjustment This adjustment is required either […]

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  Adjustments LX-105O+ Service Manual 4.1.2 Paper Feed Motor Backlash Adjustment This adjustment is required either when the paper feed motor is replaced or when its mounting position is shifted. 1. Separate side frames from base frame. (See section 3.2.5.4) 2. Loose the two CBS(0)(M3 x 6) screws on the paper feed motor. 3. Manually rotate the paper […]

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  LX-105O+ Service Manual Adjustments 4.1.3 Platen Gap Adjustment Following the removal of the carriage guide shaft or adjust lever, or if printing is abnormal, the gap between the platen and the print head should be adjusted. 1. Remove the printer mechanism (See section 3.2.4), 2. Remove the printhead. Using tweezers, remove the ribbon mask. Remove […]

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  Adjustments LX-105O+ Service Manual 8. insert the blade of a screwdriver into the countersink of carnage guide shaft. < Countersink> Large Small == /’ ” r— I I Carriage G;ide Shaft B I I Figure 4-5. Platen Gap Adjustment 9. Adjust the platen gap using a thickness gauge, while rotating carnage guide shaft in the direction of the arrow[…]

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  LX-105O+ Service Manual Adjustments 4.2 61-DIRECTIONAL PRINTING ALIGNMENT ADJUSTMENT The bi-directional printing alignment adjustment is required when the printer mechanism or the main board is replaced. By performing this adjustment, a compensation value is determined for the mechanical control as to compensate the deviation of print position, whi[…]

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  Chapter 5 Troubleshooting Table of Contents 5.1 OVERVIEW 5-1 5.2 SELF-DIAGNOSTIC FUNCTION 5-2 5.3 TROUBLESHOOTING 5-2 5.3.1 Troubleshooting of Abnormal Operation . . . . . . . . . . . . . . . . . . . . . . . . . 5-3 5.3.2 Unit Repair — TAMA Main Control Board . . . . . . . . . . . . . . . . . . . . . . . . 5-12 List of Tables Table 5-1. Motor Resis[…]

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  LX-105O+ Service Manual Troubleshooting 5.1 OVERVIEW Troubleshooting most other serial impact dot matrix printers is difficult to perform, since there may be wide variety of problems. Therefore, the LX-105O+ have a sophisticated, built-in selfdiagnostic function that reduces troubleshooting time by identifying failed parts or components. The follow[…]

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  Troubleshooting LX-1050+ Service Manual 5.2 SELF-DIAGNOSTIC FUNCTION This section describes the selfdiagnostic function, in which the controller automatically checks the operating conditions of each component. If any abnormality is detected, the printer displays an error message by beep sound. Table 5-3 lists the messages that tell you if service m[…]

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  LX-105O+ Servjce Manual Troubleshooting 5.3 TROUBLESHOOTING This section describes the troubleshooting of abnormal operations and circuit board unit repair. 5.3.1 Troubleshooting of Abnormal Operation This section describes how to detect malfunctions, how to determine the cause, and what actions to take for various types of malfunctions. Each parag[…]

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  Troubleshooting LX-105O+ Service Manual Table 5-5. The Printer does Not Operate at All Cause Step The TA-a filter unit maybe ~ dead. I The TAMA board maybe bead. 4 Checkpoint Finding Is connector CN9 on the TAMA board disconnected? Yes Is the fuse F1 on the TA-a filter unit blown? Yes With the power on, are there output of 26 VAC between two red wi[…]

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  LX-105O+ Service Manual Troubleshooting Table 5-8. Carriage Error Displayed Cause Step Checkpoint Finding Solution Check the Turn the printer off and try to move carriage The carriage 1 the carriage manually. Does the No mechanism, and mechanism is bad. carriage move smoothly? replace or reassembly the bad patiS. Does the carriage move and clash Th[…]

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  Troubleshooting LX-105O+ Service Manual Table 5-9. Paper is Not Fed (1) Cause Step Checkpoint Finding Solution The paper end sensor Does the sensor toggle? Replace the ‘ (Check with multimeter) No may be dead. paper end sensor. The release sensor Does the sensor toggle? Replace the may be dead. 2 (Check with multimeter) No release sensor. Disconn[…]

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  LX-105O+ Service Manual Troubleshooting Table 5-10. Paper is Not Fed (2) Cause The paper end sensor may be dead. The release sensor may be dead. The paper feed motor may be dead. The paper path may be bad. Cause The paper end sensor is dead. 1 2 3 4 Checkpoint Does the sensor toggle? (Check with multimeter) Does the sensor toggle? (Check with multi[…]

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  Troubleshooting LX-105O+ Service Manual Table 5-12. Abnormal Voltage Displayed Cause Step Checkpoint Finding The CR motor, PF Connector CN5 and CN8 motor or printhead coil 1 disconnect, and power on. Does printer not display abnormal Yes is short. voltage? The TAMA board may 2 — be bad. — Table 5-13. Incorrect SRAM Displayed Solution Replace CR[…]

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  LX-105O+ Service Manual Troubleshooting Table 5-16. Self-test Printout has Poor Quality (1) Cause Step Checkpoint Finding Solution The printhead wire 1 Check the printhead. No Replace the may be broken. Are wires OK? printhead. Check the printhead coil resistance by multirneter. Yes Replace the .(refer to figure 5-1) printhead. Are coils short or o[…]

• Страница 78

  Troubleshooting LX-105O+ Service Manual Table 5-17. Self-test Printout has Poor Quality (2) Cause Step Checkpoint Finding Solution Paper feed mechanism , Check the paper feed mechanism Replace or may be bad. gears and rollers. No reassemble Are there OK? gears and rollers. Disconnect CN5 on the TAMA board and check the coil resistance between: pin […]

• Страница 79

  LX-105O+ Service Manual Troubleshooting Table 5-19. Abnormal Printing in On-line Mode (2) Cause Step Checkpoint Finding Solution Software setting may , Is it OK? No Set the software be bad. settings. Dip switch settings of ~ Is it OK? No Set the dip printer may be bad. switch settings. Interface cable may be ~ Change the interface cable. No Replace[…]

• Страница 80

  Troubleshooting LX-105O+ Service Manual 5.3.2 Unit Repair — TAMA Main Control Board This section describes the problems related to the main control board (TAMA). The table below provides various symptoms, likely causes, and checkpoints. me checkpoints refer to waveforms, resistance, and other values to be checked to evaluate the operation of each c[…]

• Страница 81

  LX-105O+ Service Manual Troubleshooting Table 5-21. Repair of the TAMA Board (Continued) Symptom rhe printer joes not >perate at all. Condition The CPU is not operating. cause rhe reset circuit s not operating. Selection of mntrol ROM is ~bnormal. 7AM is defective rhe CPU is jefective Checkpoint Oheck the voltage waveforms at the E24V and for th[…]

• Страница 82

  Troubleshooting LX-105O+ Service Manual Table 5-21. Repair of the TAMA Board (Continued) e..— +A — Pfinr4itinn Cause Check~oint Solution !5-14 Rev. A[…]

• Страница 83

  LX-105O+ Service Manual Troubleshooting Table 5-21. Repair of the TAMA Board (Continued) Rev. A 5-15[…]

• Страница 84

  Chapter 6 Maintenance Table of Contents 6.1 MAINTENANCE 6-1 6.1.1 Preventive Maintenance . . . . . . . . . . 6.1.2 Lubrication and Adhesive Application . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1 List of Figures Figure 6-1. Figure 6-2. Correct Adhesive Application . . . . . . .[…]

• Страница 85

  LX-105O+ Service Manual Maintenance 6.1 MAINTENANCE Proper maintenance assures optimal and long-term printer perforrnan ce and minimizes the occurrence of malfunctions. Be sure to disconnect the printmfiom the power supply before maintenance. Do not apply thinner, trichloroethylene, or ketone-based solvents to any of the printer’s plastic compone[…]

• Страница 86

  Maintenance LX-105O+ Service Manual Table 6-2. Lubrication Points Ref. No. Lubrication Points Lubricant (1) Contact portion of paper feed lever drive shaft and paper feed lever G-26 (2) Contact portion of paper feed lever drive shaft and base frame G-26 (3) Oil pad o-2 (4) Contact portion of release lever and paper feed lever drive shaft G-26 (5) C[…]

• Страница 87

  LX-105O+ Service Manual Maintenance Figure 6-2. Lubrication Points Rev. A 6-3[…]

• Страница 88

  Appendix Table of Contents A.1 CONNECTOR SUMMARY A-1 A.2 CIRCUIT DIAGRAM A-5 A.3 CIRCUIT BOARD COMPONENT LAYOUT A-8 A.4 EXPLODED DIAGRAM A-9 Figure A-1. Figure A-2. Figure A-3. Figure A-4. Figure A-5. Figure A-6. Figure A-7. List of Figures Interconnection of Major Components . . . . . . . . . . . . . . . . . . . . . . A-1 TAMA Main Control Board C[…]

• Страница 89

  LX-105O+ Service Manual Appendix A.1 CONNECTOR SUMMARY Figure below shows the intercomection between the major components of the LX-105O+. TAPNL- W Contrgrr~anel Model 3D60 Printer Mechanism ;; Inn::; Release PE HOME HEAD I I A II II 4> 1 I I I I I I I I I I I I _l t — . ——- L ———- HOST COMPUTER 1 Figure A-1. Interconnection of Major […]

• Страница 90

  Appendix LX-105O+ Service Manual Table A-1. Connector Summary Connector Description Pins Reference TAMA Main Control Board I CN1 I Parallel interface I 36pin I Table 1-5 ] CN2 Optional interface board connector 26 pin Table A-2 CN3 Control panel 10 pin Table A-3 CN4 Release lever 2 pin Table A-4 CN5 CR motor and PF motor 12 pin Table A-5 CN6 PE sen[…]

• Страница 91

  LX-105O+ Service Manual Appendix Table A-2. Connector Pin Assignment — CN2 Pin No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 Signal Name ERR PE D7 BUSY D6 ACK D5 IN ITRD4 STB D8 AC12 RESET AC12 D3 +5V D2 +24V D1 +12V Pls — SLCTIN GND TxD GND I/o o 0 I o I o I I I I I . 0 — I — I — I — I — I — o — Descripti[…]

• Страница 92

  Appendix LX-105O+ Service Manual Table A-5. Connector Pin Assignment — CN5 Pin No. 1 2 3 4 5 6 7 8 9 10 11 12 Signal Name CRD CRB CRCDCOM CRABCOM CRC CRA PFD PFB PFCOM PFCOM PFC PFA I/o o 0 0 0 0 0 0 0 0 0 0 0 Description CR Phase D CR Phase B CR CD Common CRAB Common CR Phase C CR Phase A PF Phase D PF Phase B PF Common PF Common PF Phase C PF Pha[…]

• Страница 93

  LX-105O+ Sewice Manual Appendix AC A INPUT , “’J) RI .O.lgF LED I G Figure A-3. TA-a Filter Unit Circuit Diagram E: Swl 4 SW2 3 200Q SW3 2 SW4 ~ 401 10 $ GREEN LED2 GREEN 8 I o LED4 1 ) Figure A-4. Control Panel Circuit Diagram GND ONLINE SW FF SW LF SW LD/EJ SW BUZZER READY LP ONLINE LP PE LP +5” Rev. A A-7[…]

• Страница 94

  Appendix LX-105O+ Service Manual A.3 CIRCUIT BOARD COMPONENT LAYOUT c z II II .- . -a Figure A-5. TAMA Main Control Board Component Layout A-a Rev. A[…]

• Страница 95

  LX-105O+ Service Manual Appendix A.4 EXPLODED DIAGRAM Figure A-6. LX-105O+ Exploded Diagram N A — Rev. A A%[…]

• Страница 96

  Appendix LX-105O+ Service Manual Figure A-7. Printer Mechanism Exploded Diagram A-10 Rev. A[…]

• Страница 97

  I EPSON OVERSEAS MARKETING LOCATIONS I EPSON AMERICA, INC. EPSON DEUTSCHLAND GmbH 20770 Madrona Avenue, Ztilpicher StraBe 6,4000 Dikseldorf 11 P.O. B OX 2842 F.R. Germany Torrance, CA 90509-2642 Phone: 0211-56030 Phone: (800) 922-8911 Fax: 0211-504-7787 Fax: (310) 782-5220 EPSON UK LTD. EPSON FRANCE S.A. Campus 100, Maylands Avenue, 68 bis, rue Mar[…]

• Страница 98

  EPSON Printed in Japan 94.04-.2-G[…]

• Epson LX-1050+ — page 1

  EPSON TERMINAL PRINTER LX-1050 + SERVICE MANUAL EPSON 400328 3 ,’ ,, …

• Epson LX-1050+ — page 2

  NOTICE All rights reserved. Reproduction of any part of this manual in any form whatsoever without SEIKO EPSON’s express written permission is forbidden. The contents of this manual are subjects to change without notice. All efforts have been made to ensure theaccuracyof the contents of this manuaI. However, should any errors be detected, SEIKO E …

• Epson LX-1050+ — page 3

  PRECAUTIONS Precautionary notations throughout the text are categorized relative to 1) personal inju~ and 2) damage to equipment. DANGER Signals a precaution which, if ignored, could result in serious or fatal personal injury. Great caution should be exercised in performing procedures preceded by DANGER Headings. WARNING Signals a precaution which, …

• Epson LX-1050+ — page 4

  PREFACE This manual describes functions, theory of electrical and mechanical operations, maintenance, and repair of LX-105O+. The instructions and procedures included herein are intended for the experience repair technician, and attention should be given to the precautions on the preceding page. The chapters are organized as follows: CHAPTER 1. GEN …

• Epson LX-1050+ — page 5

  REVISION SHEET Revision Issue Date Revision Page Rev. A May 18, 1994 1st issue -v- …

• Epson LX-1050+ — page 6

  TABLE OF CONTENTS CHAPTER 1. CHAPTER 2. CHAPTER 3. CHAPTER 4. CHAPTER 5. CHAPTER 6. APPENDIX GENERAL DESCRIPTION OPERATING PRINCIPLES DISASSEMBLY AND ASSEMBLY ADJUSTMENTS TROUBLESHOOTING MAINTENANCE — vi — …

• Epson LX-1050+ — page 7

  Chapter 1 General Description Table of Contents 1.1 FEATURES 1-1 1.2 SPECIFICATIONS 1-3 1.2.1 1.2.2 1.2.3 1.2.4 1.2.5 1.2.6 1.2.7 1.2.8 1.2.9 Printing Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Paper Handling Specification. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Paper Speci …

• Epson LX-1050+ — page 8

  List of Tables Table 1-1. Options for LX-105O+ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 Table 1-2. Print Speed and Printable Columns . . . . . . . . . . . . . . . . . . . . . . . . . l-s Table l-3. CharacterTables. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I-A Table Table Table …

• Epson LX-1050+ — page 9

  LX-105O+ Service Manual General Description 1.1 FEATURES The LX-105O+ is a small, light-weight, low-cost, advanced paper handling printer. Its main features are: c1 Q Ci c1 c1 The LX-105O+ has four Standard version: India version: Russian version: Latin version: South Europe version: versions. Different parts are Program ROM version only. ROM versi …

• Epson LX-1050+ — page 10

  General Description LX-105O+ Service Manual Table 1-1 lists the optional units available for the LX-1050+. Table 1-1. Options for LX-105O+ Cat. No. Description 8143 New Serial Interface Board C82302*/C82304* 32KB Serial Interface C82303* 32KB Parallel Interface 8165 IEEE-488 Interface Board C80624* Single Bin Cut Sheet Feeder i C80014* [ PullTracto …

• Epson LX-1050+ — page 11

  LX-105O+ Service Manual General Description 1.2 SPECIFICATIONS This section provides detailed statistics for this printer. 1.2.1 Printing Specification Printing Method: Serial, impact, dot matrix Pin Configuration: 9 wires (diameter 0.29rnm) #1 #2 #3 #4 #5 #8 #7 #8 #9 b 0.29 mm &—=- 0.35 mm(l/72”) Figure 1-2. I Pin Configuration Print direct …

• Epson LX-1050+ — page 12

  General Description LX-105O+ Service Manual lot matrix format: 9 X 9 Text mode (Draft) 18X 20 Text mode (NLQ Ytaracter sets: ~haracter tables: 13 international character sets See Table 1-3. Table 1-3. Character Tables SW)ck[d India l?~su~ln Latin South Character Table Model Model E$;mg~ ITALIC o 0 0 0 0 PC437 (US/ Standard Europe) o 000 0 PC850 (Mu …

• Epson LX-1050+ — page 13

  LX-105O+ Service Manual General Description 1.2.2 Paper Handling Specification Line spacing: 1/6 inch or 1/8 inch, or progr ammable in units of 1/216 inch Line feed speed: Approximately 95 ms (1/6 inch line feed) Approximately 75 ms (1/6 inch in page feed) Paper feed method: Friction feed Tractor feed (push tractor: standard, pull tractor: optional …

• Epson LX-1050+ — page 14

  General Description LX-105O+ Service Manual 13 mm min. Continuous paper I 345.4 mm max. ➤ o 0 0 0 I Printable area 4—D o 0 0 0 0 .———————————— c1 0 0 0 n u 0 0 0 13 mm min. Adjust lever settings Figure 1-4. Printable Area — Continuous Paper The adjust lever must be set to the proper position for the paper thickness. Tabl …

• Epson LX-1050+ — page 15

  LX-105O+ Service Manual General Description 1.2.4 Ink Ribbon Type: #8755 Ribbon Cartridge Color: Black Reliability: 3 million characters at 14 dots/character 1.2.5 Environmental Conditions Temperature: -30 to60“C — Storage 5to35“C — Operation Humidity: 5 to 85 YO RH (no condensation) — Storage 10to801%0 RH (no condensation) — Operation Resistan …

• Epson LX-1050+ — page 16

  General Description LX-105O+ Service Manual 1.3 INTERFACE OVERVIEW Centronics parallel interface Optional Type A interface Parallel InterFace The LX-105O+ is equipped with the following external interfaces; ■ ■ 1.3.1 Data Format 8-bit parallel Synchronization By STROBE pulse Handshaking By BUSY and ACKNLG signal Signal Level Ill-compatible Adap …

• Epson LX-1050+ — page 17

  LX-105O+ Sewice Manual General Description —. . . . -. . — . . .- . . Table 1-6. Connector Pin Assignments and Signal Functions (Cont.) Pin No. Signal Name 1/0 Description This signal indicates whether paper is available in the 12 PE o printer or not. A HIGH level indicates a no paper condition. 13 SLCT o pulled up to +5V though 3.3KQ resistor …

• Epson LX-1050+ — page 18

  General Description LX-105O+ Service Manual 1.4 PRINTER OPERATIONS This section describes the basic operations of the printer. 1.4.1 Control Panel The control panel of this printer contains four non-lock type push buttons and four LED indicators for easy ope;ation of the various printer function. [Buttons] D POWER D READY 0 ON LINE m PAPER OUT OFF …

• Epson LX-1050+ — page 19

  LX-105O+ Service Manual General Description 1.4.2 SelecType Functions SelecType allows the user to choose fonts and the printing mode easily. This function provides for selection of Draft, Roman, or Saris Serif fonts and selection of normal printing or condensed printing modes. SelecType is effective only when the printer is ON LINE and not printin …

• Epson LX-1050+ — page 20

  General Description L.X-1050+ Service Manual 1.4.5 DIP Switch Settings The two DIP switches are located on the side of the printer and function as shown in Tables 1-7 throum 1-10. Note that the status of the DIP switches is read only at power on or upon receipt of the INIT signal. Table 1-7. Settings for DIP Switch I I I I SW No. Description ON OFF …

• Epson LX-1050+ — page 21

  LX-105O+ Service Manual General Description Table 1-9. Character Table Selection (DIP SW 1-5: ON) Sw 1-6 Sw 1-7 Sw 1-8 ~:pj:;d India :?:/:: Latin South version Version Europe Version I ON ON ON PC437 PC437 PC437 PC437 PC437 ON ON OFF PC850 PC437 PC866 PC852 PC857 ON OFF ON PC860 PC437 PC869 MAZOWIA ISO Lat. IT ON OFF OFF PC863 PC437 Bulgaria Code M …

• Epson LX-1050+ — page 22

  General Description LX-105O+ Service Manual 1.4.6 Buzzer Operation The buzzer sounds under the following conditions: BEL code: Carriage trouble: PaperQut: Abnormal voltage: Incorrect SRAM: Incorrect RAMinside CPU: Recognition of panel operation: Factory setting: Sheet ejection failure (in CSF mode): Illegal paper release/ unrelease: The buzzer soun …

• Epson LX-1050+ — page 23

  LX-105O+ Service Manual Ganeral Description 1.5 MAIN COMPONENTS The main components of the LX-105O+ printers are designed for easy removal and replacement to maintain/repair the printers. The main components are: Cl TAMA board: Main control board. The CPU on this board controls all main functions. D TAPNL-W control panel: Control panel. Cl TAa filt …

• Epson LX-1050+ — page 24

  General Description LX-105O+ Service Manual 1.5.2 TAa Filter Unit The TAa filter unit contains a power cord (120V Version) or AC inlet (220/240V Version), power switch, fuse filter circuit, and power transformer. 120V Version Figure 1-9. TAa Filter Unit 220/240V Version 1.5.3 Printer Mechanism (M-3D60) The M-3D60 printer mechanism was developed spe …

• Epson LX-1050+ — page 25

  Chapter 2 Operating Principles Table of Contents 2.1 OVERVIEW 2-1 2.2 OPERATING PRINCIPLES OF THE PRINTER MECHANISM 2-1 2.2.1 Printhead Printing Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2 2.2.2 Carriage Drive Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3 2.2.2.1 Home Posit …

• Epson LX-1050+ — page 26

  List of Tables Table 2-1. Ribbon-Feed Gear Train. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7 Table 2-2. Voltage Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8 Table 2-3. Functionsofthe Main ICand Circutis . . . . . . . . . . . . . . . . . . . . . . . 2-10 Table 2-4. Phase-Excita …

• Epson LX-1050+ — page 27

  LX-105O+ Service Manual Operating Principles 2.1 OVERVIEW This section describes the operating principles of the printer mechanism and the electrical circuits of the LX-105O+. 2.2 OPERATING PRINCIPLES OF THE PRINTER MECHANISM The LX-105O+ printer mechanism is composed of the printhead unit, paper feed mechanism, carriage drive mechanism, and variou …

• Epson LX-1050+ — page 28

  Operating Principles LX-105O+ Service Manual 2.2.1 Printhead Printing Operation The dot-wire operation during printing is as follows. When the head-driving coil for a dot wire is energized, the actuating plate, which is engaged to one end of the dot wire, is attracted to the iron core, and drives the dot wire toward the platen. The dot wire forcefu …

• Epson LX-1050+ — page 29

  LX-1050+ Service Manual Operating Principles 2.2.2 Carriage Drive Mechanism The carriage mechanism includes the printhead, the carriage, the timing belt, the carriage motor, and the platen. The timing belt is connected to the bottom of the carriage. The belt is driven by the carriage motor and moved via the beltdriven pulley. The printhead is mount …

• Epson LX-1050+ — page 30

  Operating Principles LX-105O+ Service Manual 2.2.3 Paper Feed Mechanism Operation Friction feeding is used for cut sheets, and push tractor feeding is used for fanfold paper. Friction-Feed Operation The paper is held against the platen by paper-feed rollers. The paper-feed motor rotates the platen gear, via the paper-feed reduction gear, in the dir …

• Epson LX-1050+ — page 31

  LX-105O+ Service Manual Operating Principles Push Tractor Feed Operation When the push tractor unit is used, the paper is set such that its holes mesh with the tractor pins along the tractor belt. The paper feed motor is driven and, via the pinion on the motor shaft, rotates the gears in the direction shown in following figure, rotating the tractor …

• Epson LX-1050+ — page 32

  Operating Principles LX-105O+ Service Manual 2.2.3.1 Paper End Sensor Following figure show the paper end sensor. This sensor switch is ON when no paper is in place (e.g., when the paper supply has run out.). ~ Paper 2 “Paper present” Figure 2-7. Paper End Sensor Mechanism 2.2.3.2 Release Sensor The release sensor senses the position of the rel …

• Epson LX-1050+ — page 33

  LX-105O+ Service Manual Operating Principles 2.2.4 Ribbon Advance Mechanism The ribbon-feed mechanism consists of the ribbon cartridge and the ribbon-feed section. The ribbondriving gear is always driven counterclockwise (regardless of the timing belt direction) via the gear trains shown in following table. Table 2-1. Ribbon-Feed Gear Train 1 I Dir …

• Epson LX-1050+ — page 34

  Operating Principles LX-105O+ Service Manual 2.3 OPERATING PRINCIPLES OF THE ELECTRICAL CIRCUITRIES This section describes principles of electrical circuitries. 2.3.1 Operating Principles of the Power Supply Circuit The electrical power required by this mechanism is developed using the TAa Fiher Unit (which combines a filter and a power transformer …

• Epson LX-1050+ — page 35

  LX-105O+ Service Manual Operating Principles 2.3.2 Operating Principles of the Main Control Circuit The printer CPU is an 8-bit CPU ~D7810HG running at 15 MHz. It oversees control of all the components of the printer. The E05A30 gate array contains various memory management functions that control the assignment of the memory and 1/0 areas. CPU vPD7 …

• Epson LX-1050+ — page 36

  Operating Principles LX-105O+ Service Manual Table 2-3. Functions of the Main IC and Circuits IC and Circuits Looation Functions Receives data from the host computer and loads the data to the input buffer in RAM. Expands the input data held in the buffer to vPD781 OHG 2C create image data. Loads this image data to the image buffer in RAM. Transfers …

• Epson LX-1050+ — page 37

  LX-105O+ Service Manual Operating Principles 2.3.2.2 Sensor Circuit Following figure shows the sensor circuit in block diagram. The PAO of CPU port senses carriage home position. The PA1 senses paper end. The PA2 senses release lever position. The AN5 of CPU A/D convertor senses +24V line voltage. HOME PE RELEASE +24V line CPU PAO uPD7810HG (2C) PA …

• Epson LX-1050+ — page 38

  Operating Principles LX-1050+ Service Manual 2.3.2.4 Paper Feed Motor Drive Circuit The paper-feed motor drive circuit is shown in following figure. me paper-feed motor is a step motor which can utilize 2-2 phase excitation. When the paper-feed signal PC2 is set to HIGH, Q20 and Q16 are turned on, and +24 V is supplied to the motor. When the paper- …

• Epson LX-1050+ — page 39

  LX-105O+ Service Manual Operating Principles 2.3.2.5 Printhead Drive Circuit Gate array E05A30 is used as an 8-bit + l-bit data latch. The CPU determines the pulse width for the head-wire drive pulses from gate array E05A30 by monitoring the printhead drive power (+24 V line). The E05A30 gate array includes circuitry to interface the CPU and the pr …

• Epson LX-1050+ — page 40

  Operating Principles LX-105O+ Service Manual 2.3.2.6 Host Interface The host interface circuit is shown in following figure. STROBE pulses from the host computer pass through the low-pass filter, consisting of R72 and C12, and flow into the STROBE terminal. These pulses latch the parallel data and set the BUSY signal HIGH, so that subsequent data t …

• Epson LX-1050+ — page 41

  LX-105O+ Service Manual Operating Principles 2.3.2.7 EEPROM Circuit The EEPROM stores in its memory the current feed position of continuously fed paper, as well as the current panel settings. This memory is retained even after power is shut off. EEPROM can memorize the current position of continuously fed paper, so that this information can be main …

• Epson LX-1050+ — page 42

  Chapter 3 Disassembly and Assembly Table of Contents 3.1 GENERAL REPAIR INFORMATION 3-1 3.2 DISASSEMBLY AND ASSEMBLY 3-2 3.2.1 Printhead Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2 3.2.2 Removal of Casing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4 3.2.2.1 U …

• Epson LX-1050+ — page 43

  Figure 3-25. Paper Guide Plate Removal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-16 Figure3-26. Adjust l_everRernoval . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-17’ Figure 3-27. Tractor Frame l-Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-17 Figure 3-28. Extraction ofTractorunti . …

• Epson LX-1050+ — page 44

  LX-105O+ Service Manual Disassembly and Assembly 3.1 GENERAL REPAIR INFORMATION This chapter describes the procedures for removin~ replacins and adjusting the main components of the LX-105O+. Prior to beginning any of these procedures, be certain that the AC power cord is disconnected. To help prevent hands jiotn being cut by the printer mechanism …

• Epson LX-1050+ — page 45

  Disassembly and Assembly LX-105O+ Service Manual 3.2 DISASSEMBLY AND ASSEMBLY This section details the disassembly procedures for the LX-105O+. As a rule, reassembly is performed by simply reversing the procedures; a number of special notes, however, are provided under the heading “Notes for Reassembly.” When a disassembly or reassembly procedu …

• Epson LX-1050+ — page 46

  LX-105O+ Service Manual Disassembly and Assembly [Step 3] Unlock the two levers securing the printhead to thecarnage bypulhngthemdown. Then lift and remove the printhead. P Levers Figure 3-2. Printhead Removal [Step 4] Disconnect the head cable from theconnector ontheprinthead. Rev. A 3-3 …

• Epson LX-1050+ — page 47

  Disassembly and Assembly LX-105O+ Service Manual 3.2.2 Removal of Casing This section details the procedure for removing the upper casing and the control panel. 3.2.2.1 Upper Casing Removal [Step 1] [Step 2] [Step 3] [Step 4] Remove the sheet guide unit, printer cover, paper tension unit, and paper feed knob. Pull in the two notches securing the pu …

• Epson LX-1050+ — page 48

  LX-105O+ Service Manual Disassembly and Assembly [Step 5] While lifting the upper casing, discomect the cable of the control panel from connector CN3 on the TAMA board. Then remove the upper casing. Figure 3-5. Upper Casing Removai -2 NOTE FOR REASSEMBLY: Before reassembling the upper casin& prepare the FFC (Flat Flexible Cable) that connects t …

• Epson LX-1050+ — page 49

  Disassembly and Assembly LX-105O+ Service Manual 3.2.2.2 Control Panel Removal [Step 1] Remove the upper casing (as described in the previous section). [step 2] Turn the upper casing over, push in the two notches on the casing that are securing the control panel to it, and remove the control panel. ane l Figure 3-7. Control Panel Removal 3-6 Rev. A …

• Epson LX-1050+ — page 50

  LX-105O+ Service Manual Disassembly and Assembly 3.2.3 Removal of Circuit Boards This section describes the procedure for removing the TAMA Board and the TA-a filter unit. 3.2.3.1 [Step 1] TAMA Board Removal Remove the upper casing (See section 3.2.2.1). The following connectors on the TAMA —- board, which are connecting it to external components …

• Epson LX-1050+ — page 51

  Disassembly and Assembly LX-1050+ Service Manual 3.2.3.2 [Step 1] [Step 2] [Step 3] [Step 4] TA-a Filter Unit Removal Remove the upper casing (See section 3.2.2.1). Disconnect connector CN9 at the TAMA board. This comector comects the TA-a filter unit. Remove the C. B.(O) (M4 x screw securing the frame ground wire. Remove the two C. B.B-tite (M4 …

• Epson LX-1050+ — page 52

  LX-105O+ Service Manual Disassembly and Assembly 3.2.5 Disassembly of Printer Mechanism This section details the removal of components from the printer mechanism. 3.2.5.1 Removal of Carriage Motor [Step 1] Remove theprintermechanism (See section 3.2.4). [Step 2] Disconnect the motor cable from the carriage motor. [Step 3] Remove the belt tension sp …

• Epson LX-1050+ — page 53

  Disassembly and Assembly LX-105O+ Service Manual 3.2.5.2 Removal of Home-Position Sensor [Step 1] Remove the printer mechanism. (See section3.2. [Step 2] Turn the printer mechanism upside-down. [Step 3] Push in the notch securing the home-position base frame. 4) sensor, and remove the sensor from the Notch HP Sensor Figure 3-13. Home-Position Senso …

• Epson LX-1050+ — page 54

  LX-105O+ Service Manual Disassembly and Assembly 3.2.5.3 Removal of Platen [Step 1] Remove the printer mechanism. (See section 3.2.4) [Step2] Remove the paper tension unit. [Step3] Remove the C-ring (6) from the plate shaft. Crecent Ring Figure 3-14. Cresent Ring Removal [Step 4] Remove the two C.B.N.Stite (M3 x 6) screws securing the platen cover …

• Epson LX-1050+ — page 55

  Disassembly and Assembly LX-105O+ Service Manual 3.2.5.4 Separate of Frame [Step 1] Remove the platen. (See section 3.2.5.3) [Step 2] Remove the printhead. (See section 3.2.1) [Step3] Remove the FFC, head cable holder (L), and head cable holder (R) from base frame. Head Cable’ Hoder L Head Cable Hoder R Figure 3-16. Head Cable Holder and FFC Remo …

• Epson LX-1050+ — page 56

  LX-105O+ Service Manual Disassembly and Assembly [Step 6] Push thetwonotches of the release lever outward. Remove the release lever. Figure 3-18. Release Lever Removal When the release lever is replaced, the markings should be analogously positioned. } Release Lever L o Marking f .’ Figure 3-19. Release Lever Replacement Rev. A 3-13 …

• Epson LX-1050+ — page 57

  Disassembly and Assembly LX-105O+ Service Manual [Step 7] Separate the tractor cancellation cum from paper feed lever cancellation shaft. an -2iiB Paw ,Tractor Disengage Cam Lever Drive Shaft Separation of Tractor Diseugage Cam [Step 8] Turn the printer mechanism upside-down, and manually move the carriage unit until it is at the cut-out section …

• Epson LX-1050+ — page 58

  LX-105O+ Service Manual Disassembly and Assembly [Step9] Remove the two C.B.S-tite. (0) (M3 x 6) screws which are securing the side frames to the base frame, and remove the side frames. Separate side frames from base frame. CBS(0) (M3~ 6) Screws Figure 3-22. Separate of Frame When the printer mechanism is separated, perform the following adjustment …

• Epson LX-1050+ — page 59

  Disassembly and Assembly LX-105O+ Service Manual 3.2.5.6 [Step 1] [Step 2] [Step 3] 3.2.5.7 [Step 1] [Step 2] [Step 3] Removal of Paper End Sensor Separate side frames from base frame. (See section 3.2.5.4) Loosen the two bends securing the paper end sensor to the paper guide at the back of the printer. Remove the paper end sensor. Bends r Figure 3 …

• Epson LX-1050+ — page 60

  LX-105O+ Service Manual Disassembly and Assembly 3.2.5.8 Removal of Carriage [Step 1] %paratesideframes from base frame. (Seesection3.2.5 .4) [Step 2] Remove the HNO (M4) nut Securing theadjustlever, and remove the adjust lever. [Step 3] Remove the head adjust lever from thecarriage guide shaft. [Step 4] Remove thecarnageguide shaft and the carriag …

• Epson LX-1050+ — page 61

  Disassembly and Assembly LX-105O+ Service Manual [Step 2] Remove the tractor set L, the paper support, and tractor set R from the tractor and sprocket guide shafts. 4- T7 5- Figure NOTES FOR REASSEMBLY: 3-28. Extraction of Tractor Set When reassembling, align the phases as shown below. /a ,- ‘,.-’, Figure 3-29. Tractor Phase Alignment 3-18 Rev. …

• Epson LX-1050+ — page 62

  Chapter 4 Adjustments Table of Contents 4.1 ADJUSTMENTS 4-1 4.1.1 Carriage Motor Backlash Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1 4.1.2 Paper Feed Motor Backlash Adjustment. . . . . . . . . . . . . . . . . . . . . . . . . 4-2 4.1.3 Paten Gap Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . …

• Epson LX-1050+ — page 63

  LX-105O+ Service Manual Adjustments 4.1 ADJUSTMENTS This section describes the adjustment procedures necessary when the LX-105O+ printer is reassembled or when parts are reinstalled or replaced. These procedures are necessary to ensure the correct operation of the printer. 4.1.1 Carriage Motor Backlash Adjustment This adjustment is required either …

• Epson LX-1050+ — page 64

  Adjustments LX-105O+ Service Manual 4.1.2 Paper Feed Motor Backlash Adjustment This adjustment is required either when the paper feed motor is replaced or when its mounting position is shifted. 1. Separate side frames from base frame. (See section 3.2.5.4) 2. Loose the two CBS(0)(M3 x 6) screws on the paper feed motor. 3. Manually rotate the paper …

• Epson LX-1050+ — page 65

  LX-105O+ Service Manual Adjustments 4.1.3 Platen Gap Adjustment Following the removal of the carriage guide shaft or adjust lever, or if printing is abnormal, the gap between the platen and the print head should be adjusted. 1. Remove the printer mechanism (See section 3.2.4), 2. Remove the printhead. Using tweezers, remove the ribbon mask. Remove …

• Epson LX-1050+ — page 66

  Adjustments LX-105O+ Service Manual 8. insert the blade of a screwdriver into the countersink of carnage guide shaft. < Countersink> Large Small == /’ ” r— I I Carriage G;ide Shaft B I I Figure 4-5. Platen Gap Adjustment 9. Adjust the platen gap using a thickness gauge, while rotating carnage guide shaft in the direction of the arrow …

• Epson LX-1050+ — page 67

  LX-105O+ Service Manual Adjustments 4.2 61-DIRECTIONAL PRINTING ALIGNMENT ADJUSTMENT The bi-directional printing alignment adjustment is required when the printer mechanism or the main board is replaced. By performing this adjustment, a compensation value is determined for the mechanical control as to compensate the deviation of print position, whi …

• Epson LX-1050+ — page 68

  Chapter 5 Troubleshooting Table of Contents 5.1 OVERVIEW 5-1 5.2 SELF-DIAGNOSTIC FUNCTION 5-2 5.3 TROUBLESHOOTING 5-2 5.3.1 Troubleshooting of Abnormal Operation . . . . . . . . . . . . . . . . . . . . . . . . . 5-3 5.3.2 Unit Repair — TAMA Main Control Board . . . . . . . . . . . . . . . . . . . . . . . . 5-12 List of Tables Table 5-1. Motor Resis …

• Epson LX-1050+ — page 69

  LX-105O+ Service Manual Troubleshooting 5.1 OVERVIEW Troubleshooting most other serial impact dot matrix printers is difficult to perform, since there may be wide variety of problems. Therefore, the LX-105O+ have a sophisticated, built-in selfdiagnostic function that reduces troubleshooting time by identifying failed parts or components. The follow …

• Epson LX-1050+ — page 70

  Troubleshooting LX-1050+ Service Manual 5.2 SELF-DIAGNOSTIC FUNCTION This section describes the selfdiagnostic function, in which the controller automatically checks the operating conditions of each component. If any abnormality is detected, the printer displays an error message by beep sound. Table 5-3 lists the messages that tell you if service m …

• Epson LX-1050+ — page 71

  LX-105O+ Servjce Manual Troubleshooting 5.3 TROUBLESHOOTING This section describes the troubleshooting of abnormal operations and circuit board unit repair. 5.3.1 Troubleshooting of Abnormal Operation This section describes how to detect malfunctions, how to determine the cause, and what actions to take for various types of malfunctions. Each parag …

• Epson LX-1050+ — page 72

  Troubleshooting LX-105O+ Service Manual Table 5-5. The Printer does Not Operate at All Cause Step The TA-a filter unit maybe ~ dead. I The TAMA board maybe bead. 4 Checkpoint Finding Is connector CN9 on the TAMA board disconnected? Yes Is the fuse F1 on the TA-a filter unit blown? Yes With the power on, are there output of 26 VAC between two red wi …

• Epson LX-1050+ — page 73

  LX-105O+ Service Manual Troubleshooting Table 5-8. Carriage Error Displayed Cause Step Checkpoint Finding Solution Check the Turn the printer off and try to move carriage The carriage 1 the carriage manually. Does the No mechanism, and mechanism is bad. carriage move smoothly? replace or reassembly the bad patiS. Does the carriage move and clash Th …

• Epson LX-1050+ — page 74

  Troubleshooting LX-105O+ Service Manual Table 5-9. Paper is Not Fed (1) Cause Step Checkpoint Finding Solution The paper end sensor Does the sensor toggle? Replace the ‘ (Check with multimeter) No may be dead. paper end sensor. The release sensor Does the sensor toggle? Replace the may be dead. 2 (Check with multimeter) No release sensor. Disconn …

• Epson LX-1050+ — page 75

  LX-105O+ Service Manual Troubleshooting Table 5-10. Paper is Not Fed (2) Cause The paper end sensor may be dead. The release sensor may be dead. The paper feed motor may be dead. The paper path may be bad. Cause The paper end sensor is dead. 1 2 3 4 Checkpoint Does the sensor toggle? (Check with multimeter) Does the sensor toggle? (Check with multi …

• Epson LX-1050+ — page 76

  Troubleshooting LX-105O+ Service Manual Table 5-12. Abnormal Voltage Displayed Cause Step Checkpoint Finding The CR motor, PF Connector CN5 and CN8 motor or printhead coil 1 disconnect, and power on. Does printer not display abnormal Yes is short. voltage? The TAMA board may 2 — be bad. — Table 5-13. Incorrect SRAM Displayed Solution Replace CR …

• Epson LX-1050+ — page 77

  LX-105O+ Service Manual Troubleshooting Table 5-16. Self-test Printout has Poor Quality (1) Cause Step Checkpoint Finding Solution The printhead wire 1 Check the printhead. No Replace the may be broken. Are wires OK? printhead. Check the printhead coil resistance by multirneter. Yes Replace the .(refer to figure 5-1) printhead. Are coils short or o …

• Epson LX-1050+ — page 78

  Troubleshooting LX-105O+ Service Manual Table 5-17. Self-test Printout has Poor Quality (2) Cause Step Checkpoint Finding Solution Paper feed mechanism , Check the paper feed mechanism Replace or may be bad. gears and rollers. No reassemble Are there OK? gears and rollers. Disconnect CN5 on the TAMA board and check the coil resistance between: pin …

• Epson LX-1050+ — page 79

  LX-105O+ Service Manual Troubleshooting Table 5-19. Abnormal Printing in On-line Mode (2) Cause Step Checkpoint Finding Solution Software setting may , Is it OK? No Set the software be bad. settings. Dip switch settings of ~ Is it OK? No Set the dip printer may be bad. switch settings. Interface cable may be ~ Change the interface cable. No Replace …

• Epson LX-1050+ — page 80

  Troubleshooting LX-105O+ Service Manual 5.3.2 Unit Repair — TAMA Main Control Board This section describes the problems related to the main control board (TAMA). The table below provides various symptoms, likely causes, and checkpoints. me checkpoints refer to waveforms, resistance, and other values to be checked to evaluate the operation of each c …

• Epson LX-1050+ — page 81

  LX-105O+ Service Manual Troubleshooting Table 5-21. Repair of the TAMA Board (Continued) Symptom rhe printer joes not >perate at all. Condition The CPU is not operating. cause rhe reset circuit s not operating. Selection of mntrol ROM is ~bnormal. 7AM is defective rhe CPU is jefective Checkpoint Oheck the voltage waveforms at the E24V and for th …

• Epson LX-1050+ — page 82

  Troubleshooting LX-105O+ Service Manual Table 5-21. Repair of the TAMA Board (Continued) e..— +A — Pfinr4itinn Cause Check~oint Solution !5-14 Rev. A …

• Epson LX-1050+ — page 83

  LX-105O+ Service Manual Troubleshooting Table 5-21. Repair of the TAMA Board (Continued) Rev. A 5-15 …

• Epson LX-1050+ — page 84

  Chapter 6 Maintenance Table of Contents 6.1 MAINTENANCE 6-1 6.1.1 Preventive Maintenance . . . . . . . . . . 6.1.2 Lubrication and Adhesive Application . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1 List of Figures Figure 6-1. Figure 6-2. Correct Adhesive Application . . . . . . . …

• Epson LX-1050+ — page 85

  LX-105O+ Service Manual Maintenance 6.1 MAINTENANCE Proper maintenance assures optimal and long-term printer perforrnan ce and minimizes the occurrence of malfunctions. Be sure to disconnect the printmfiom the power supply before maintenance. Do not apply thinner, trichloroethylene, or ketone-based solvents to any of the printer’s plastic compone …

• Epson LX-1050+ — page 86

  Maintenance LX-105O+ Service Manual Table 6-2. Lubrication Points Ref. No. Lubrication Points Lubricant (1) Contact portion of paper feed lever drive shaft and paper feed lever G-26 (2) Contact portion of paper feed lever drive shaft and base frame G-26 (3) Oil pad o-2 (4) Contact portion of release lever and paper feed lever drive shaft G-26 (5) C …

• Epson LX-1050+ — page 87

  LX-105O+ Service Manual Maintenance Figure 6-2. Lubrication Points Rev. A 6-3 …

• Epson LX-1050+ — page 88

  Appendix Table of Contents A.1 CONNECTOR SUMMARY A-1 A.2 CIRCUIT DIAGRAM A-5 A.3 CIRCUIT BOARD COMPONENT LAYOUT A-8 A.4 EXPLODED DIAGRAM A-9 Figure A-1. Figure A-2. Figure A-3. Figure A-4. Figure A-5. Figure A-6. Figure A-7. List of Figures Interconnection of Major Components . . . . . . . . . . . . . . . . . . . . . . A-1 TAMA Main Control Board C …

• Epson LX-1050+ — page 89

  LX-105O+ Service Manual Appendix A.1 CONNECTOR SUMMARY Figure below shows the intercomection between the major components of the LX-105O+. TAPNL- W Contrgrr~anel Model 3D60 Printer Mechanism ;; Inn::; Release PE HOME HEAD I I A II II 4> 1 I I I I I I I I I I I I _l t — . ——- L ———- HOST COMPUTER 1 Figure A-1. Interconnection of Major …

• Epson LX-1050+ — page 90

  Appendix LX-105O+ Service Manual Table A-1. Connector Summary Connector Description Pins Reference TAMA Main Control Board I CN1 I Parallel interface I 36pin I Table 1-5 ] CN2 Optional interface board connector 26 pin Table A-2 CN3 Control panel 10 pin Table A-3 CN4 Release lever 2 pin Table A-4 CN5 CR motor and PF motor 12 pin Table A-5 CN6 PE sen …

• Epson LX-1050+ — page 91

  LX-105O+ Service Manual Appendix Table A-2. Connector Pin Assignment — CN2 Pin No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 Signal Name ERR PE D7 BUSY D6 ACK D5 IN ITRD4 STB D8 AC12 RESET AC12 D3 +5V D2 +24V D1 +12V Pls — SLCTIN GND TxD GND I/o o 0 I o I o I I I I I . 0 — I — I — I — I — I — o — Descripti …

• Epson LX-1050+ — page 92

  Appendix LX-105O+ Service Manual Table A-5. Connector Pin Assignment — CN5 Pin No. 1 2 3 4 5 6 7 8 9 10 11 12 Signal Name CRD CRB CRCDCOM CRABCOM CRC CRA PFD PFB PFCOM PFCOM PFC PFA I/o o 0 0 0 0 0 0 0 0 0 0 0 Description CR Phase D CR Phase B CR CD Common CRAB Common CR Phase C CR Phase A PF Phase D PF Phase B PF Common PF Common PF Phase C PF Pha …

• Epson LX-1050+ — page 93

  LX-105O+ Sewice Manual Appendix AC A INPUT , “’J) RI .O.lgF LED I G Figure A-3. TA-a Filter Unit Circuit Diagram E: Swl 4 SW2 3 200Q SW3 2 SW4 ~ 401 10 $ GREEN LED2 GREEN 8 I o LED4 1 ) Figure A-4. Control Panel Circuit Diagram GND ONLINE SW FF SW LF SW LD/EJ SW BUZZER READY LP ONLINE LP PE LP +5” Rev. A A-7 …

• Epson LX-1050+ — page 94

  Appendix LX-105O+ Service Manual A.3 CIRCUIT BOARD COMPONENT LAYOUT c z II II .- . -a Figure A-5. TAMA Main Control Board Component Layout A-a Rev. A …

• Epson LX-1050+ — page 95

  LX-105O+ Service Manual Appendix A.4 EXPLODED DIAGRAM Figure A-6. LX-105O+ Exploded Diagram N A — Rev. A A% …

• Epson LX-1050+ — page 96

  Appendix LX-105O+ Service Manual Figure A-7. Printer Mechanism Exploded Diagram A-10 Rev. A …

• Epson LX-1050+ — page 97

  I EPSON OVERSEAS MARKETING LOCATIONS I EPSON AMERICA, INC. EPSON DEUTSCHLAND GmbH 20770 Madrona Avenue, Ztilpicher StraBe 6,4000 Dikseldorf 11 P.O. B OX 2842 F.R. Germany Torrance, CA 90509-2642 Phone: 0211-56030 Phone: (800) 922-8911 Fax: 0211-504-7787 Fax: (310) 782-5220 EPSON UK LTD. EPSON FRANCE S.A. Campus 100, Maylands Avenue, 68 bis, rue Mar …

• Epson LX-1050+ — page 98

  EPSON Printed in Japan 94.04-.2-G …

• Page 1: Service Manual

  EPSON TERMINAL PRINTER L X — 1 0 5 0 + SERVICE MANUAL EPSON 4 0 0 3 2 8 3 ,’…

• Page 2
  All efforts have been made to ensure theaccuracyof the contents of this manuaI. However, should any errors be detected, SEIKO EPSON would greatly appreciate being informed of them. The above notwithstanding SEIKO EPSON can assume no responsibility for any errors in this manual or the consequence thereof.
• Page 3
  THE POWER SUPPLY CABLE MUST BE CONNECTED, USE EXTREME CAUTION IN WORKING ON POWER SUPPLY AND OTHER ELECTRONIC COMPONENTS. REPAIRS ON EPSON PRODUCT SHOULD BE PERFORMED ONLY BY AN EPSON CERTIFIED REPAIR TECHNICIAN. MAKE CERTAIN THAT THE SOURCE VOLTAGE IS THE SAME AS THE RATED VOLT- AGE, LISTED ON THE SERIAL NUMBER/RATING PLATE.
• Page 4
  The chapters are organized as follows: CHAPTER 1. GENERAL DESCRIPTION Provides a general product overview, lists specifications, and illustrates the main components of the printer. CHAPTER 2. OPERATING PRINCIPLES Describes the theory of printer operation.
• Page 5
  REVISION SHEET Revision Issue Date Revision Page May 18, 1994 Rev. A issue…
• Page 6
  TABLE OF CONTENTS CHAPTER 1. CHAPTER 2. CHAPTER 3. CHAPTER 4. CHAPTER 5. CHAPTER 6. APPENDIX GENERAL DESCRIPTION OPERATING PRINCIPLES DISASSEMBLY AND ASSEMBLY ADJUSTMENTS TROUBLESHOOTING MAINTENANCE vi -…

• Page 7: Table Of Contents

  1.5.2 TAa Filter Unit……….1-16 1.5.3 Printer Mechanism (M-3D60)……. . . 1-16 Figure 1-1.

• Page 8: List Of Tables

  Table 1-1. Options for LX-105O+ ……..1-1 Table 1-2.

• Page 9: Features

  LX-105O+ Service Manual 1.1 FEATURES The LX-105O+ is a small, light-weight, low-cost, advanced paper handling printer. Its main features are: versions. Different parts are Program ROM version only. four The LX-105O+ has ROM version SOxxxx Standard version: ROM version Slxxxx…

• Page 10
  General Description Table 1-1 lists the optional units available Table 1-1. Options for LX-105O+ Cat. No. 8143 C82302*/C82304* C82303* 8165 C80624* i C80014* 8755 for the LX-1050+. Description New Serial Interface Board 32KB Serial Interface 32KB Parallel Interface IEEE-488 Interface Board Single Bin Cut Sheet Feeder [ PullTractorUnit Ribbon Cartridge…

• Page 11: Specifications

  LX-105O+ Service Manual 1.2 SPECIFICATIONS This section provides detailed statistics for this printer. 1.2.1 Printing Specification Printing Method: Serial, impact, dot matrix Pin Configuration: 9 wires (diameter 0.29rnm) Figure 1-2. Bi-directional printing with logical seeking (Text mode) Print direction: Uni-directional (left to right) printing (Bit image mode) Print speed: See Table 1-2.
• Page 12
  General Description 9 X 9 matrix format: 18X 20 Text mode (NLQ 13 international character sets Ytaracter sets: ~haracter tables: See Table 1-3. Table 1-3. Character Tables Character Table ITALIC PC437 (US/ Standard Europe) PC850 (Multilingual) PC860 (Portuguese) PC863 (Canadian-French) PC865 (Nordic) PC866 (Russian) PC855 (Cyrillic)

• Page 13: General Description

  LX-105O+ Service Manual Paper Handling Specification 1.2.2 1/6 inch or 1/8 inch, or programmable in units of 1/216 inch Line spacing: Approximately 95 ms (1/6 inch line feed) Line feed speed: Approximately 75 ms (1/6 inch in page feed) Friction feed Paper feed method: Tractor feed (push tractor: standard, pull tractor: optional) Rear…

• Page 14
  General Description Continuous paper 13 mm min. .———————————— Figure 1-4. Printable Area — Continuous Paper The adjust lever must be set to the proper position for the paper Adjust lever settings thickness. Table 1-4. Adjust Lever Settings Lever position 2nd step 3rd step Figure 1-5.

• Page 15: Reliability

  LX-105O+ Service Manual 1.2.4 Ink Ribbon #8755 Ribbon Cartridge Type: Black Color: 3 million characters at 14 dots/character Reliability: 1.2.5 Environmental Conditions Temperature: -30 to60“C — Storage 5to35“C — Operation 5 to 85 Humidity: 10to801%0 2 G, 1 ms — Storage Resistance to shock: 1 G, 1 ms — Operation 0.50 G (55 Hz max.) — Storage…

• Page 16: Interface Overview

  ACKNLG is an acknowledge pulse with a width of approximately 10P.s. This signal goes LOW upon the completion of data reception, to indicates that the printer is ready to receive further data. The BUSY signal informs the host computer of the printer’s status.

• Page 17: Optional Interface #8143

  — runs out of paper. — off line. Signal ground. Used Pulled up to +5 V through 3.3 KQ resistor in the printer. The DC1/DC3 code is only valid when this signal is HIGH. 1 bit 1 bit or more…

• Page 18: Printer Operations

  1.4 PRINTER OPERATIONS This section describes the basic operations of the printer. 1.4.1 Control Panel The control panel of this printer contains four non-lock type push buttons and four LED indicators for easy ope;ation of the various printer function. [Buttons]…

• Page 19: Selectype Functions

  To select the Draft font, press the DRAFT button. The buzzer will sound once, indicating that the DRAFT font is selected. To set for condensed printing when the printer is in the print mode, press the CONDENSED button once (the buzzer will sound once), and the printer will enter the condensed print mode.

• Page 20: Dip Switch Settings

  General Description 1.4.5 DIP Switch Settings The two DIP switches are located on the side of the printer and function as shown in Tables 1-7 throum 1-10. Note status of the DIP switches is read only at power on or upon receipt of that the INIT signal.

• Page 21
  Manual LX-105O+ Service Table 1-9. Character Table Selection (DIP SW 1-5: ON) Sw 1-8 ~:pj:;d Sw 1-7 PC437 PC850 PC860 PC863 PC865 PC437 PC437 PC437 Table Rev. A India :?:/:: version PC437 PC437 PC437 PC866 PC437 PC869 PC437 Bulgaria PC437 PC437 PC437 PC437…

• Page 22: Buzzer Operation

  This printer has EEPROM, it memorized SelecType settings, position of continuous paper, and bi-directional printing adjustment value. EEPROM reset operations are only required after the main board replacement, EEPROM replacement, or printer mechanism replacement. The EEPROM is cleared, when the printer power on while FF and LOAD/EJECT switches are pressed. 1-14 LX-105O+ Service Manual Rev.

• Page 23: Main Components

  D M-3D60: Printer mechanism. 1.5.1 TAMA Main Control Board The TAMA board is the main controller of this printer. It takes charge of interfacing with the host computer and processing of received print data, as well as control of the whole printer mechanism.

• Page 24: Taa Filter Unit

  TAa filter unit contains a power cord (120V Version) or AC inlet (220/240V Version), power switch, fuse filter circuit, and power transformer. 120V Version Figure 1-9. TAa Filter Unit 1.5.3 Printer Mechanism (M-3D60) The M-3D60 printer mechanism was developed specifically for the LX-105O+ printer. Its components include: Carriage motor Carriage mechanism Paper feed motor…

• Page 25: Table Of Contents

  Figure 2-1 Block Diagram of the Printer Mechanism ….2-1 Printhead-Printing Operation ……2-2 Figure 2-2 Figure 2-3.

• Page 26
  of Tables List Table 2-1. Ribbon-Feed Gear Train……..2-7 Table 2-2.

• Page 27: Overview

  LX-105O+ Service Manual 2.1 OVERVIEW This section describes the operating principles of the printer mechanism and the electrical circuits of the LX-105O+. OPERATING PRINCIPLES OF THE PRINTER MECHANISM printer mechanism is composed of the printhead unit, paper feed mechanism, The LX-105O+ carriage drive mechanism, and various sensors.

• Page 28: Printhead Printing Operation

  Operating Principles 2.2.1 Printhead Printing Operation The dot-wire operation during printing is as follows. When the head-driving coil for a dot wire is energized, the actuating plate, which is engaged to one end of the dot wire, is attracted to the iron core, and drives the dot wire toward the platen.

• Page 29: Carriage Drive Mechanism

  LX-1050+ Service Manual Drive Mechanism 2.2.2 Carriage The carriage mechanism includes the printhead, the carriage, the timing belt, the carriage motor, and the platen. The timing belt is connected to the bottom of the carriage. The belt is driven by the carriage motor and moved via the beltdriven pulley.

• Page 30: Paper Feed Mechanism Operation

  Operating Principles 2.2.3 Paper Feed Mechanism Operation Friction feeding is used for cut sheets, and push tractor feeding is used for fanfold paper. Friction-Feed Operation The paper is held against the platen by paper-feed rollers. The paper-feed motor rotates the platen gear, via the paper-feed reduction gear, in the direction shown in following figure.

• Page 31
  LX-105O+ Service Manual Push Tractor Feed Operation When the push tractor unit is used, the paper is set such that its holes mesh with the tractor pins along the tractor belt. The paper feed motor is driven and, via the pinion on the motor shaft, rotates the gears in the direction shown in following figure, rotating the tractor belts.

• Page 32: Paperendsensor

  Operating Principles Sensor 2.2.3.1 Paper End Following figure show the paper end sensor. This sensor switch is ON when no paper is in place (e.g., when the paper supply has run out.). Figure 2-7. Paper End Sensor Mechanism Release Sensor 2.2.3.2 The release sensor senses the position of the release lever in order to detect whether tractor feed or friction feed is in effect.

• Page 33: Ribbon Advance Mechanism

  LX-105O+ Service Manual 2.2.4 Ribbon Advance Mechanism The ribbon-feed mechanism consists of the ribbon cartridge and the ribbon-feed section. The ribbondriving gear is always driven counterclockwise (regardless of the timing belt direction) via the gear trains shown in following table. Table 2-1.

• Page 34: Operating Principles Of The Electrical Circuitries

  Operating Principles 2.3 OPERATING PRINCIPLES OF THE ELECTRICAL CIRCUITRIES This section describes principles of electrical circuitries. 2.3.1 Operating Principles of the Power Supply Circuit The electrical power required by this mechanism is developed combines a filter and a power transformer) and the T14NfA board. The Ac input passes first through the filter circuit, where line noise is removed, and is then set to the transformer, where it is stepped down into two separate voltages: AC 26V and AC 12C.

• Page 35: Operating Principles Of The Main Control Circuit

  LX-105O+ 2.3.2 Operating Principles of the Main Control Circuit The printer CPU is an 8-bit CPU ~D7810HG running at 15 MHz. It oversees control of all the components of the printer. The E05A30 gate array contains various memory management functions that control the assignment of the memory and 1/0 areas.

• Page 36: Reset Circuits

  E05A30 gate array. 2.3.2.1 Reset Circuit 11-tis circuit generates the signal that initializes the printer, and is made by monitoring the +5 and +24V voltages when the power is switched ON and OFF. The reset signal line is comect to the CPU and gate array 3B.

• Page 37: Sensor Circuit

  LX-105O+ Service Manual Sensor Circuit 2.3.2.2 Following figure shows the sensor circuit in block diagram. The PAO of CPU port senses carriage home position. The PA1 senses paper end. The PA2 senses release lever position. The AN5 of CPU A/D convertor senses +24V line voltage. HOME RELEASE +24V…

• Page 38: Paper Feed Motor Drive Circuit

  Operating Principles 2.3.2.4 Paper Feed Motor Drive Circuit paper-feed motor drive circuit is shown in following figure. me paper-feed motor is a step motor which can utilize 2-2 phase excitation. When the paper-feed signal PC2 is set to HIGH, Q20 and Q16 are turned on, and +24 V is supplied to the motor.

• Page 39: Printhead Drive Circuit

  LX-105O+ Service Manual Printhead Drive Circuit 2.3.2.5 Gate array E05A30 is used as an 8-bit + l-bit data latch. The CPU determines the pulse width for the head-wire drive pulses from gate array E05A30 by monitoring the printhead drive power (+24 V line).

• Page 40: Host Interface

  Operating Principles 2.3.2.6 Host Interface The host shown in following figure. STROBE pulses from the host computer pass interface circuit is through the low-pass filter, consisting of R72 and C12, and flow into the STROBE terminal. These pulses latch the parallel data and set the BUSY signal HIGH, so that subsequent data transfer is inhibited.

• Page 41: Eeprom Circuit

  LX-105O+ Service Manual Circuit 2.3.2.7 EEPROM The EEPROM stores in its memory the current feed position of continuously fed paper, as well as the current panel settings. This memory is retained even after power is shut off. EEPROM can memorize the current position of continuously fed paper, so that this information can be maintained even if power goes off.

• Page 42
  3.2.3.2 TA-a Filter Unit Removal……. 3-8 3.2.4 Removal of Printer Mechanism . .“……3-8 3.2.5 Disassembly of Printer Mechanism .
• Page 43
  Figure 3-25. Paper Guide Plate Removal……3-16 Figure3-26. Adjust l_everRernoval ……. . . 3-17’ Figure 3-27.

• Page 44: General Repair Information

  Prior to beginning any of these procedures, be certain that the AC power cord is disconnected. To help prevent hands jiotn being cut by the printer mechanism or sharp plate edges, wear gloves when performing these procedures. The printer mechanism, boards, and other parts are sometimes held in place with plastic clips rather than screws.

• Page 45: Disassembly And Assembly

  The disassembly procedure detailed below is in the following sequence: (1) removal of the printhead, (2) removal of the casings, (3) removal of the circuit boards, (4) removal of the printer mechanism unit, and (5) disassembly of the printer mechanism.

• Page 46
  LX-105O+ Service Manual Disassembly and Assembly [Step Unlock the two levers securing the printhead to thecarnage bypulhngthemdown. Then lift and remove the printhead. Levers Figure 3-2. Printhead Removal [Step Disconnect the head cable from theconnector ontheprinthead. Rev. A…

• Page 47: Removal Of Casing

  3.2.2.1 Upper Casing Removal Remove the sheet guide unit, printer cover, paper tension unit, and paper feed knob. [Step 1] Pull in the two notches securing the push tractor to the printer mechanism, and remove [Step the push tractor from the printer mechanism.

• Page 48
  LX-105O+ Service Manual [Step While lifting the upper casing, discomect the cable of the control panel from connector CN3 on the TAMA board. Then remove the upper casing. Figure 3-5. Upper Casing Removai -2 NOTE FOR REASSEMBLY: Before reassembling the upper casin& prepare the FFC (Flat Flexible Cable) that connects the Control Panel and TAMA board in such a way that it can be connected to the Panel Cable Sailed Plate.

• Page 49: Control Panel Removal

  LX-105O+ Service Manual Disassembly and Assembly Control Panel Removal 3.2.2.2 [Step 1] Remove the upper casing (as described in the previous section). [step Turn the upper casing over, push in the two notches on the casing that are securing the control panel to it, and remove the control panel.

• Page 50: Removal Of Circuit Boards

  LX-105O+ Service Manual 3.2.3 Removal of Circuit Boards This section describes the procedure for removing the TAMA Board Removal 3.2.3.1 Remove the upper casing (See section 3.2.2.1). The following connectors on the TAMA [Step 1] board, which are connecting it to external components, should be disconnected: CN4, CN5, CN6, CN7, CN8 FFC (Flexible Flat Cable), and CN9.

• Page 51: Ta-A Filter Unit Removal

  Disconnect the cables from the following connectors on the TAMA board: CN4 (red), [Step 1] CN5 (white), CN6 (black), and CN8 FFC (Flexible Flat Cable). [Step 2] Remove the fore C. B.B-tite (M4 x 12) screws securing the printer mechanism to the lower case. Remove the printer mechanism. [Step 3] II+M! Figure 3-10.

• Page 52: Disassembly Of Printer Mechanism

  LX-105O+ Service Manual 3.2.5 Disassembly of Printer Mechanism This section details the removal of components from the printer mechanism. 3.2.5.1 Removal of Carriage Motor [Step 1] Remove theprintermechanism (See section 3.2.4). [Step 2] Disconnect the motor cable from the carriage motor.

• Page 53
  Disassembly and Assembly 3.2.5.2 Removal of Home-Position [Step 1] Remove the printer mechanism. (See section3.2. [Step 2] Turn the printer mechanism upside-down. [Step 3] Push in the notch securing the home-position base frame. Figure 3-13. Home-Position Sensor Removal 3-10 LX-105O+ Service Manual…

• Page 54: Removalofplaten

  LX-105O+ Service Manual 3.2.5.3 Removal of Platen [Step 1] Remove the printer mechanism. (See section 3.2.4) [Step2] Remove the paper tension unit. [Step3] Remove the C-ring (6) from the plate shaft. Figure 3-14. Cresent Ring Removal [Step C.B.N.Stite (M3 x 6) screws securing the platen cover and remove the Remove the two platen cover.

• Page 55
  Disassembly and Assembly 3.2.5.4 Separate of Frame [Step 1] Remove the platen. (See section 3.2.5.3) [Step 2] Remove the printhead. (See section 3.2.1) [Step3] Remove the FFC, head cable holder (L), and head cable holder (R) from base frame. Head Cable’ Hoder L Figure 3-16.
• Page 56
  LX-105O+ Service Manual [Step 6] Push thetwonotches of the release lever outward. Remove the release lever. Figure 3-18. Release Lever Removal When the release lever is replaced, the markings should be analogously positioned. Marking Figure 3-19. Release Lever Replacement Rev. A Release Lever .’…
• Page 57
  Separate the tractor cancellation cum from paper feed lever cancellation shaft. [Step Separation of Tractor Diseugage Cam Turn the printer mechanism upside-down, and manually move the carriage unit until it is [Step at the cut-out section of the base frame. The joint of the carriage unit and timing belt should be visible through the cut-out.

• Page 58: Removal Ofpaperfeed Motor

  Separate side frames from base frame. CBS(0) (M3~ 6) Screws Figure 3-22. Separate When the printer mechanism is separated, perform the following adjustment. Section 4.1.3 Platen Gap Adjustment 3.2.5.5 Removal of Paper Feed Motor [Step 1] Separate side frames from base frame.

• Page 59: Removal Ofpaperendsensor

  [Step Separate side frames from base frame. (See section 3.2.5.4) Loosen the two bends securing the paper end sensor to the paper guide at the back of the [Step printer. Remove the paper end sensor. [Step 3] Figure 3-24. Paper Removal of Paper Guide Plate 3.2.5.7…

• Page 60: Removal Ofcarriage

  LX-105O+ Service Manual 3.2.5.8 Removal of Carriage [Step 1] %paratesideframes from base frame. (Seesection3.2.5 .4) [Step 2] Remove the HNO (M4) nut Securing theadjustlever, and remove the adjust lever. [Step 3] Remove the head adjust lever from thecarriage guide shaft. [Step 4] Remove thecarnageguide shaft and the carriage from the frame.

• Page 61
  LX-105O+ Service Manual Disassembly and Assembly Remove the tractor set L, the paper support, and tractor set R from the tractor and [Step 2] sprocket guide shafts. Figure 3-28. Extraction of Tractor Set NOTES FOR REASSEMBLY: When reassembling, align the phases as shown below. ‘,.-’, Figure 3-29.
• Page 62
  Chapter 4 Adjustments Table of Contents 4.1 ADJUSTMENTS 4.1.1 Carriage Motor Backlash Adjustment ……4-1 4.1.2 Paper Feed Motor Backlash Adjustment.
• Page 63
  LX-105O+ Service Manual ADJUSTMENTS section describes the adjustment procedures necessary when the LX-105O+ printer is This reassembled or when parts are reinstalled or replaced. These procedures are necessary to ensure the correct operation of the printer. 4.1.1 Carriage Motor Backlash Adjustment…
• Page 64
  Adjustments 4.1.2 Paper Feed Motor Backlash Adjustment adjustment is required either when the paper This position is shifted. Separate side frames from base frame. (See section 3.2.5.4) CBS(0)(M3 x 6) screws on the paper feed motor. Loose the two 3. Manually rotate the paper feed motor, and adjust the backlash between the pinion and the appear feed reduction gear.
• Page 65
  Following the removal of the carriage guide shaft or adjust lever, or if printing is abnormal, the gap between the platen and the print head should be adjusted. 1. Remove the printer mechanism (See section 3.2.4), Remove the printhead. Using tweezers, remove the ribbon mask. Remove the maskby pulling it slightly forward, then lifting.
• Page 66
  Adjustments insert the blade of a screwdriver into the countersink of carnage guide shaft. < Countersink> Large / ’ ” Carriage G;ide Shaft B Figure 4-5. Platen Gap Adjustment 9. Adjust the platen gap using a thickness gauge, while rotating carnage guide shaft in the direction of the arrow in figure.
• Page 67
  The printer stores the compensation data in the EEPROM on the main board (TAMA), and referring to this data when the bi-directional printing is performed.
• Page 68
  Table 5-4. Symptoms and Problems……. . . 5-3 Table 5-5. The Printer does Not Operate at All ……5-4 Table 5-6.
• Page 69
  LX-105O+ Service Manual 5.1 OVERVIEW Troubleshooting most other serial impact dot matrix printers is difficult to perform, since there may be wide variety of problems. Therefore, the LX-105O+ function that reduces troubleshooting time by identifying failed parts or selfdiagnostic components. The following tables and figure provide troubleshooting information.
• Page 70
  This section describes operating conditions of each component. If any abnormality is detected, the printer displays an error message by beep sound. Table 5-3 lists the messages that tell you if service maintenance is required.

• Page 71: Troubleshooting

  Each paragraph refers you to a detailed troubleshooting table. Table 5-4. Symptoms and Problems Symptom The printer does not operate at all. The LEDs on control panel does not oDerate at all. The buttons on control panel does not…

• Page 72
  Troubleshooting The Printer does Not Operate at Table 5-5. Cause Step The TA-a filter unit maybe dead. The TAMA board maybe bead. Table 5-6. The LEDs do Not Operate at All Step Cause Connector CN3 on the TAMA board may be disconnected.
• Page 73
  The TAMA boards may be dead. Rev. A Checkpoint Turn the printer off and try to move the carriage manually. Does the carriage move smoothly? Does the carriage move and clash to right or left frame before error displayed?
• Page 74
  Troubleshooting Table 5-9. Paper is Not Fed (1) Step Cause The paper Does the sensor toggle? sensor ‘ (Check with multimeter) may be dead. Does the sensor toggle? The release sensor (Check may be dead. Disconnect CN5 on the TAMA board and cheek the coil resistance between: pin 12 and pin 10;…
• Page 75
  LX-105O+ Service Manual Table 5-10. Paper is Not Fed (2) Cause The paper end sensor may be dead. The release sensor may be dead. The paper feed motor may be dead. The paper path may be bad. Table 5-11. Paper Out Displayed Step Cause The paper end sensor…
• Page 76
  Table 5-12. Abnormal Voltage Displayed Cause Step Connector CN5 and CN8 The CR motor, PF disconnect, and power on. motor or printhead coil Does printer not display abnormal is short. voltage? The TAMA board may — be bad. Table 5-13. Incorrect SRAM Displayed…
• Page 77
  LX-105O+ Service Manual Table 5-16. Self-test Printout has Poor Quality (1) Cause Step The printhead wire may be broken. The printhead coil short or open. Rev. A Checkpoint Check the printhead. Are wires OK? Check the printhead coil resistance by multirneter. .(refer to figure 5-1) Are coils short or open? If any coil is shorted, check the…
• Page 78
  Troubleshooting Table 5-17. Self-test Printout has Poor Quality (2) Step Cause Check the paper feed mechanism Paper feed mechanism gears and rollers. may be bad. Are there OK? Disconnect board and between: pin 12 and pin 10; pin 8 and pin 10; pin 11 and pin 9; pin 7 and pin 9 (4 points total) on the disconnected cable side using a multimeter.
• Page 79
  Table 5-19. Abnormal Printing in On-line Step Cause Software setting may be bad. Dip switch settings of printer may be bad. Interface cable may be bad. The TAMA board may be bad. Table 5-20. Abnormal Printing in On-1ine Mode (3)
• Page 80
  Table 5-21. Repair of the TAMA Board Condition Symptom IC 3A is defective The printer The +24V is ~oes not jead. >perate at all. IC 3Aor transistor Q1 (Q2) is defective.
• Page 81
  LX-105O+ Service Manual Table 5-21. Repair of the TAMA Board (Continued) Condition Symptom rhe reset circuit s not operating. Selection of rhe printer CPU is mntrol ROM is joes not not operating. ~bnormal. >perate at all. 7AM is defective rhe CPU is…
• Page 82
  LX-105O+ Service Manual Troubleshooting Table 5-21. Repair of the TAMA Board (Continued) Solution e..— +A — Check~oint Cause Pfinr4itinn Rev. A !5-14…
• Page 83
  LX-105O+ Service Manual Troubleshooting Table 5-21. Repair of the TAMA Board (Continued) Rev. A 5-15…
• Page 84
  Maintenance Chapter 6 Table of Contents 6.1 MAINTENANCE 6.1.1 Preventive Maintenance ..6.1.2 Lubrication and Adhesive Application Figure 6-1. Correct Adhesive Application ……6-2 Figure 6-2.
• Page 85
  6.1.2 Lubrication and Adhesive Application EPSON recommends lubrication at the points illustrated in Figure 6-2. Table 6-2 provides a list of these points, and the recommended lubricant to be used for each. The lubricants—EPSON O-2, EPSON G-26, and EPSON G-37—have all been thoroughly tested and fully meet the needs of this printer.
• Page 86
  Maintenance Table 6-2. Lubrication Points Ref. No. Contact portion of paper feed lever Contact portion of paper feed lever drive shaft and base frame Oil pad Contact portion of release lever and paper feed lever drive shaft Contact portion of adjust lever and side frame left Contact portion of adjust lever and side frame left Contact portion of belt pulley and ribbon gear Contact portion of carriage and carriage guide plate…
• Page 87
  Maintenance LX-105O+ Service Manual Figure 6-2. Lubrication Points Rev. A…
• Page 88
  LX-1050+ Exploded Diagram ……A-9 Figure A-6. Printer Mechanism Exploded Diagram ….. A-10 Figure A-7.
• Page 89
  Figure below shows the intercomection between the major components of the LX-105O+. T A P N L — W Contrgrr~anel Release — . ——- L ———- HOST COMPUTER 1 Interconnection of Major Components Figure A-1. Rev. A Model 3D60 Printer Mechanism ;; Inn::; HOME HEAD Appendix 4>…
• Page 90
  Appendix Table A-1. Connector Summary Connector Main TAMA Control Board I CN1 I Parallel interface Optional interface board connector Control panel Release lever CR motor and PF PE sensor ! CN7 I Home Position sensor Printhead AC voltage input CN1O Not used TA-a Filter Unit AC voltage…
• Page 91
  LX-105O+ Service Manual Table A-2. Connector Pin Assignment — CN2 Pin No. Signal Name BUSY IN ITRD4 AC12 RESET AC12 +24V +12V — SLCTIN Table A-3. Connector Pin Assignment — CN3 Pin No. Sigrial N a m e UO LF SW FF SW LINE SW LIE SW…
• Page 92
  Appendix Table A-5. Connector Pin Assignment — CN5 Pin No. Signal Name CRCDCOM CRABCOM PFCOM PFCOM Table A-6. Connector Pin Assignment — CN6 Signal Name Pin No. Table A-7. Connector Pin Assignment — CN7 Pin No. Signal Name HOME Table A-8. Connector Pin Assignment — CN8 Name Pin No.
• Page 93
  LX-105O+ Sewice Manual INPUT Figure A-3. TA-a Filter Unit Circuit Diagram 200Q .O.lgF LED I $ GREEN Figure A-4. Control Panel Circuit Diagram Rev. A , “’J) LED2 GREEN LED4 Appendix ONLINE SW FF SW LF SW LD/EJ SW BUZZER READY LP ONLINE LP PE LP…
• Page 94
  Appendix A.3 CIRCUIT BOARD COMPONENT LAYOUT II II Figure A-5. TAMA Main Control Board Component Layout LX-105O+ Service Manual Rev. A…

• Page 95: Exploded Diagram

  LX-105O+ Service Manual EXPLODED DIAGRAM Figure A-6. LX-105O+ Exploded Diagram Rev. A Appendix A —…

• Page 96
  LX-105O+ Service Manual Appendix Figure A-7. Printer Mechanism Exploded Diagram Rev. A A-10…
• Page 97
  EPSON OVERSEAS MARKETING LOCATIONS EPSON AMERICA, INC. 20770 Madrona Avenue, P.O. B 2842 Torrance, CA 90509-2642 Phone: (800) 922-8911 Fax: (310) 782-5220 EPSON UK LTD. Campus 100, Maylands Avenue, Hemel Hempstead, Herts. HP27EZ, U.K. Phone: 442-61144 Fax: 442-227227 EPSON IBERICA, S.A.
• Page 98
  EPSON Printed in Japan 94.04-.2-G…

1. Инструкции и руководства
2. Бренды
3. Epson
4. LX-1050+
5. Справочник Пользователя

• Page 1: Epson LX-1050+

  EPSON TERMINAL PRINTER LX-1050 + SERVICE MANUAL EPSON 400328 3 ,’ ,,[…]

• Page 2: Epson LX-1050+

  NOTICE All rights reserved. Reproduction of any part of this manual in any form whatsoever without SEIKO EPSON’s express written permission is forbidden. The contents of this manual are subjects to change without notice. All efforts have been made to ensure theaccuracyof the contents of this manuaI. However, should any errors be detected, SEIKO E[…]

• Page 3: Epson LX-1050+

  PRECAUTIONS Precautionary notations throughout the text are categorized relative to 1) personal inju~ and 2) damage to equipment. DANGER Signals a precaution which, if ignored, could result in serious or fatal personal injury. Great caution should be exercised in performing procedures preceded by DANGER Headings. WARNING Signals a precaution which,[…]

• Page 4: Epson LX-1050+

  PREFACE This manual describes functions, theory of electrical and mechanical operations, maintenance, and repair of LX-105O+. The instructions and procedures included herein are intended for the experience repair technician, and attention should be given to the precautions on the preceding page. The chapters are organized as follows: CHAPTER 1. GEN[…]

• Page 5: Epson LX-1050+

  REVISION SHEET Revision Issue Date Revision Page Rev. A May 18, 1994 1st issue -v-[…]

• Page 6: Epson LX-1050+

  TABLE OF CONTENTS CHAPTER 1. CHAPTER 2. CHAPTER 3. CHAPTER 4. CHAPTER 5. CHAPTER 6. APPENDIX GENERAL DESCRIPTION OPERATING PRINCIPLES DISASSEMBLY AND ASSEMBLY ADJUSTMENTS TROUBLESHOOTING MAINTENANCE — vi -[…]

• Page 7: Epson LX-1050+

  Chapter 1 General Description Table of Contents 1.1 FEATURES 1-1 1.2 SPECIFICATIONS 1-3 1.2.1 1.2.2 1.2.3 1.2.4 1.2.5 1.2.6 1.2.7 1.2.8 1.2.9 Printing Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Paper Handling Specification. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Paper Speci[…]

• Page 8: Epson LX-1050+

  List of Tables Table 1-1. Options for LX-105O+ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 Table 1-2. Print Speed and Printable Columns . . . . . . . . . . . . . . . . . . . . . . . . . l-s Table l-3. CharacterTables. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I-A Table Table Table […]

• Page 9: Epson LX-1050+

  LX-105O+ Service Manual General Description 1.1 FEATURES The LX-105O+ is a small, light-weight, low-cost, advanced paper handling printer. Its main features are: c1 Q Ci c1 c1 The LX-105O+ has four Standard version: India version: Russian version: Latin version: South Europe version: versions. Different parts are Program ROM version only. ROM versi[…]

• Page 10: Epson LX-1050+

  General Description LX-105O+ Service Manual Table 1-1 lists the optional units available for the LX-1050+. Table 1-1. Options for LX-105O+ Cat. No. Description 8143 New Serial Interface Board C82302*/C82304* 32KB Serial Interface C82303* 32KB Parallel Interface 8165 IEEE-488 Interface Board C80624* Single Bin Cut Sheet Feeder i C80014* [ PullTracto[…]

• Page 11: Epson LX-1050+

  LX-105O+ Service Manual General Description 1.2 SPECIFICATIONS This section provides detailed statistics for this printer. 1.2.1 Printing Specification Printing Method: Serial, impact, dot matrix Pin Configuration: 9 wires (diameter 0.29rnm) #1 #2 #3 #4 #5 #8 #7 #8 #9 b 0.29 mm &—=- 0.35 mm(l/72”) Figure 1-2. I Pin Configuration Print direct[…]

• Page 12: Epson LX-1050+

  General Description LX-105O+ Service Manual lot matrix format: 9 X 9 Text mode (Draft) 18X 20 Text mode (NLQ Ytaracter sets: ~haracter tables: 13 international character sets See Table 1-3. Table 1-3. Character Tables SW)ck[d India l?~su~ln Latin South Character Table Model Model E$;mg~ ITALIC o 0 0 0 0 PC437 (US/ Standard Europe) o 000 0 PC850 (Mu[…]

• Page 13: Epson LX-1050+

  LX-105O+ Service Manual General Description 1.2.2 Paper Handling Specification Line spacing: 1/6 inch or 1/8 inch, or progr ammable in units of 1/216 inch Line feed speed: Approximately 95 ms (1/6 inch line feed) Approximately 75 ms (1/6 inch in page feed) Paper feed method: Friction feed Tractor feed (push tractor: standard, pull tractor: optional[…]

• Page 14: Epson LX-1050+

  General Description LX-105O+ Service Manual 13 mm min. Continuous paper I 345.4 mm max. ➤ o 0 0 0 I Printable area 4—D o 0 0 0 0 .———————————— c1 0 0 0 n u 0 0 0 13 mm min. Adjust lever settings Figure 1-4. Printable Area — Continuous Paper The adjust lever must be set to the proper position for the paper thickness. Tabl[…]

• Page 15: Epson LX-1050+

  LX-105O+ Service Manual General Description 1.2.4 Ink Ribbon Type: #8755 Ribbon Cartridge Color: Black Reliability: 3 million characters at 14 dots/character 1.2.5 Environmental Conditions Temperature: -30 to60“C — Storage 5to35“C — Operation Humidity: 5 to 85 YO RH (no condensation) — Storage 10to801%0 RH (no condensation) — Operation Resistan[…]

• Page 16: Epson LX-1050+

  General Description LX-105O+ Service Manual 1.3 INTERFACE OVERVIEW Centronics parallel interface Optional Type A interface Parallel InterFace The LX-105O+ is equipped with the following external interfaces; ■ ■ 1.3.1 Data Format 8-bit parallel Synchronization By STROBE pulse Handshaking By BUSY and ACKNLG signal Signal Level Ill-compatible Adap[…]

• Page 17: Epson LX-1050+

  LX-105O+ Sewice Manual General Description —. . . . -. . — . . .- . . Table 1-6. Connector Pin Assignments and Signal Functions (Cont.) Pin No. Signal Name 1/0 Description This signal indicates whether paper is available in the 12 PE o printer or not. A HIGH level indicates a no paper condition. 13 SLCT o pulled up to +5V though 3.3KQ resistor […]

• Page 18: Epson LX-1050+

  General Description LX-105O+ Service Manual 1.4 PRINTER OPERATIONS This section describes the basic operations of the printer. 1.4.1 Control Panel The control panel of this printer contains four non-lock type push buttons and four LED indicators for easy ope;ation of the various printer function. [Buttons] D POWER D READY 0 ON LINE m PAPER OUT OFF […]

• Page 19: Epson LX-1050+

  LX-105O+ Service Manual General Description 1.4.2 SelecType Functions SelecType allows the user to choose fonts and the printing mode easily. This function provides for selection of Draft, Roman, or Saris Serif fonts and selection of normal printing or condensed printing modes. SelecType is effective only when the printer is ON LINE and not printin[…]

• Page 20: Epson LX-1050+

  General Description L.X-1050+ Service Manual 1.4.5 DIP Switch Settings The two DIP switches are located on the side of the printer and function as shown in Tables 1-7 throum 1-10. Note that the status of the DIP switches is read only at power on or upon receipt of the INIT signal. Table 1-7. Settings for DIP Switch I I I I SW No. Description ON OFF[…]

• Page 21: Epson LX-1050+

  LX-105O+ Service Manual General Description Table 1-9. Character Table Selection (DIP SW 1-5: ON) Sw 1-6 Sw 1-7 Sw 1-8 ~:pj:;d India :?:/:: Latin South version Version Europe Version I ON ON ON PC437 PC437 PC437 PC437 PC437 ON ON OFF PC850 PC437 PC866 PC852 PC857 ON OFF ON PC860 PC437 PC869 MAZOWIA ISO Lat. IT ON OFF OFF PC863 PC437 Bulgaria Code M[…]

• Page 22: Epson LX-1050+

  General Description LX-105O+ Service Manual 1.4.6 Buzzer Operation The buzzer sounds under the following conditions: BEL code: Carriage trouble: PaperQut: Abnormal voltage: Incorrect SRAM: Incorrect RAMinside CPU: Recognition of panel operation: Factory setting: Sheet ejection failure (in CSF mode): Illegal paper release/ unrelease: The buzzer soun[…]

• Page 23: Epson LX-1050+

  LX-105O+ Service Manual Ganeral Description 1.5 MAIN COMPONENTS The main components of the LX-105O+ printers are designed for easy removal and replacement to maintain/repair the printers. The main components are: Cl TAMA board: Main control board. The CPU on this board controls all main functions. D TAPNL-W control panel: Control panel. Cl TAa filt[…]

• Page 24: Epson LX-1050+

  General Description LX-105O+ Service Manual 1.5.2 TAa Filter Unit The TAa filter unit contains a power cord (120V Version) or AC inlet (220/240V Version), power switch, fuse filter circuit, and power transformer. 120V Version Figure 1-9. TAa Filter Unit 220/240V Version 1.5.3 Printer Mechanism (M-3D60) The M-3D60 printer mechanism was developed spe[…]

• Page 25: Epson LX-1050+

  Chapter 2 Operating Principles Table of Contents 2.1 OVERVIEW 2-1 2.2 OPERATING PRINCIPLES OF THE PRINTER MECHANISM 2-1 2.2.1 Printhead Printing Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2 2.2.2 Carriage Drive Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3 2.2.2.1 Home Posit[…]

• Page 26: Epson LX-1050+

  List of Tables Table 2-1. Ribbon-Feed Gear Train. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7 Table 2-2. Voltage Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8 Table 2-3. Functionsofthe Main ICand Circutis . . . . . . . . . . . . . . . . . . . . . . . 2-10 Table 2-4. Phase-Excita[…]

• Page 27: Epson LX-1050+

  LX-105O+ Service Manual Operating Principles 2.1 OVERVIEW This section describes the operating principles of the printer mechanism and the electrical circuits of the LX-105O+. 2.2 OPERATING PRINCIPLES OF THE PRINTER MECHANISM The LX-105O+ printer mechanism is composed of the printhead unit, paper feed mechanism, carriage drive mechanism, and variou[…]

• Page 28: Epson LX-1050+

  Operating Principles LX-105O+ Service Manual 2.2.1 Printhead Printing Operation The dot-wire operation during printing is as follows. When the head-driving coil for a dot wire is energized, the actuating plate, which is engaged to one end of the dot wire, is attracted to the iron core, and drives the dot wire toward the platen. The dot wire forcefu[…]

• Page 29: Epson LX-1050+

  LX-1050+ Service Manual Operating Principles 2.2.2 Carriage Drive Mechanism The carriage mechanism includes the printhead, the carriage, the timing belt, the carriage motor, and the platen. The timing belt is connected to the bottom of the carriage. The belt is driven by the carriage motor and moved via the beltdriven pulley. The printhead is mount[…]

• Page 30: Epson LX-1050+

  Operating Principles LX-105O+ Service Manual 2.2.3 Paper Feed Mechanism Operation Friction feeding is used for cut sheets, and push tractor feeding is used for fanfold paper. Friction-Feed Operation The paper is held against the platen by paper-feed rollers. The paper-feed motor rotates the platen gear, via the paper-feed reduction gear, in the dir[…]

• Page 31: Epson LX-1050+

  LX-105O+ Service Manual Operating Principles Push Tractor Feed Operation When the push tractor unit is used, the paper is set such that its holes mesh with the tractor pins along the tractor belt. The paper feed motor is driven and, via the pinion on the motor shaft, rotates the gears in the direction shown in following figure, rotating the tractor[…]

• Page 32: Epson LX-1050+

  Operating Principles LX-105O+ Service Manual 2.2.3.1 Paper End Sensor Following figure show the paper end sensor. This sensor switch is ON when no paper is in place (e.g., when the paper supply has run out.). ~ Paper 2 “Paper present” Figure 2-7. Paper End Sensor Mechanism 2.2.3.2 Release Sensor The release sensor senses the position of the rel[…]

• Page 33: Epson LX-1050+

  LX-105O+ Service Manual Operating Principles 2.2.4 Ribbon Advance Mechanism The ribbon-feed mechanism consists of the ribbon cartridge and the ribbon-feed section. The ribbondriving gear is always driven counterclockwise (regardless of the timing belt direction) via the gear trains shown in following table. Table 2-1. Ribbon-Feed Gear Train 1 I Dir[…]

• Page 34: Epson LX-1050+

  Operating Principles LX-105O+ Service Manual 2.3 OPERATING PRINCIPLES OF THE ELECTRICAL CIRCUITRIES This section describes principles of electrical circuitries. 2.3.1 Operating Principles of the Power Supply Circuit The electrical power required by this mechanism is developed using the TAa Fiher Unit (which combines a filter and a power transformer[…]

• Page 35: Epson LX-1050+

  LX-105O+ Service Manual Operating Principles 2.3.2 Operating Principles of the Main Control Circuit The printer CPU is an 8-bit CPU ~D7810HG running at 15 MHz. It oversees control of all the components of the printer. The E05A30 gate array contains various memory management functions that control the assignment of the memory and 1/0 areas. CPU vPD7[…]

• Page 36: Epson LX-1050+

  Operating Principles LX-105O+ Service Manual Table 2-3. Functions of the Main IC and Circuits IC and Circuits Looation Functions Receives data from the host computer and loads the data to the input buffer in RAM. Expands the input data held in the buffer to vPD781 OHG 2C create image data. Loads this image data to the image buffer in RAM. Transfers[…]

• Page 37: Epson LX-1050+

  LX-105O+ Service Manual Operating Principles 2.3.2.2 Sensor Circuit Following figure shows the sensor circuit in block diagram. The PAO of CPU port senses carriage home position. The PA1 senses paper end. The PA2 senses release lever position. The AN5 of CPU A/D convertor senses +24V line voltage. HOME PE RELEASE +24V line CPU PAO uPD7810HG (2C) PA[…]

• Page 38: Epson LX-1050+

  Operating Principles LX-1050+ Service Manual 2.3.2.4 Paper Feed Motor Drive Circuit The paper-feed motor drive circuit is shown in following figure. me paper-feed motor is a step motor which can utilize 2-2 phase excitation. When the paper-feed signal PC2 is set to HIGH, Q20 and Q16 are turned on, and +24 V is supplied to the motor. When the paper-[…]

• Page 39: Epson LX-1050+

  LX-105O+ Service Manual Operating Principles 2.3.2.5 Printhead Drive Circuit Gate array E05A30 is used as an 8-bit + l-bit data latch. The CPU determines the pulse width for the head-wire drive pulses from gate array E05A30 by monitoring the printhead drive power (+24 V line). The E05A30 gate array includes circuitry to interface the CPU and the pr[…]

• Page 40: Epson LX-1050+

  Operating Principles LX-105O+ Service Manual 2.3.2.6 Host Interface The host interface circuit is shown in following figure. STROBE pulses from the host computer pass through the low-pass filter, consisting of R72 and C12, and flow into the STROBE terminal. These pulses latch the parallel data and set the BUSY signal HIGH, so that subsequent data t[…]

• Page 41: Epson LX-1050+

  LX-105O+ Service Manual Operating Principles 2.3.2.7 EEPROM Circuit The EEPROM stores in its memory the current feed position of continuously fed paper, as well as the current panel settings. This memory is retained even after power is shut off. EEPROM can memorize the current position of continuously fed paper, so that this information can be main[…]

• Page 42: Epson LX-1050+

  Chapter 3 Disassembly and Assembly Table of Contents 3.1 GENERAL REPAIR INFORMATION 3-1 3.2 DISASSEMBLY AND ASSEMBLY 3-2 3.2.1 Printhead Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2 3.2.2 Removal of Casing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4 3.2.2.1 U[…]

• Page 43: Epson LX-1050+

  Figure 3-25. Paper Guide Plate Removal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-16 Figure3-26. Adjust l_everRernoval . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-17’ Figure 3-27. Tractor Frame l-Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-17 Figure 3-28. Extraction ofTractorunti .[…]

• Page 44: Epson LX-1050+

  LX-105O+ Service Manual Disassembly and Assembly 3.1 GENERAL REPAIR INFORMATION This chapter describes the procedures for removin~ replacins and adjusting the main components of the LX-105O+. Prior to beginning any of these procedures, be certain that the AC power cord is disconnected. To help prevent hands jiotn being cut by the printer mechanism […]

• Page 45: Epson LX-1050+

  Disassembly and Assembly LX-105O+ Service Manual 3.2 DISASSEMBLY AND ASSEMBLY This section details the disassembly procedures for the LX-105O+. As a rule, reassembly is performed by simply reversing the procedures; a number of special notes, however, are provided under the heading “Notes for Reassembly.” When a disassembly or reassembly procedu[…]

• Page 46: Epson LX-1050+

  LX-105O+ Service Manual Disassembly and Assembly [Step 3] Unlock the two levers securing the printhead to thecarnage bypulhngthemdown. Then lift and remove the printhead. P Levers Figure 3-2. Printhead Removal [Step 4] Disconnect the head cable from theconnector ontheprinthead. Rev. A 3-3[…]

• Page 47: Epson LX-1050+

  Disassembly and Assembly LX-105O+ Service Manual 3.2.2 Removal of Casing This section details the procedure for removing the upper casing and the control panel. 3.2.2.1 Upper Casing Removal [Step 1] [Step 2] [Step 3] [Step 4] Remove the sheet guide unit, printer cover, paper tension unit, and paper feed knob. Pull in the two notches securing the pu[…]

• Page 48: Epson LX-1050+

  LX-105O+ Service Manual Disassembly and Assembly [Step 5] While lifting the upper casing, discomect the cable of the control panel from connector CN3 on the TAMA board. Then remove the upper casing. Figure 3-5. Upper Casing Removai -2 NOTE FOR REASSEMBLY: Before reassembling the upper casin& prepare the FFC (Flat Flexible Cable) that connects t[…]

• Page 49: Epson LX-1050+

  Disassembly and Assembly LX-105O+ Service Manual 3.2.2.2 Control Panel Removal [Step 1] Remove the upper casing (as described in the previous section). [step 2] Turn the upper casing over, push in the two notches on the casing that are securing the control panel to it, and remove the control panel. ane l Figure 3-7. Control Panel Removal 3-6 Rev. A[…]

• Page 50: Epson LX-1050+

  LX-105O+ Service Manual Disassembly and Assembly 3.2.3 Removal of Circuit Boards This section describes the procedure for removing the TAMA Board and the TA-a filter unit. 3.2.3.1 [Step 1] TAMA Board Removal Remove the upper casing (See section 3.2.2.1). The following connectors on the TAMA —- board, which are connecting it to external components[…]

• Page 51: Epson LX-1050+

  Disassembly and Assembly LX-1050+ Service Manual 3.2.3.2 [Step 1] [Step 2] [Step 3] [Step 4] TA-a Filter Unit Removal Remove the upper casing (See section 3.2.2.1). Disconnect connector CN9 at the TAMA board. This comector comects the TA-a filter unit. Remove the C. B.(O) (M4 x screw securing the frame ground wire. Remove the two C. B.B-tite (M4[…]

• Page 52: Epson LX-1050+

  LX-105O+ Service Manual Disassembly and Assembly 3.2.5 Disassembly of Printer Mechanism This section details the removal of components from the printer mechanism. 3.2.5.1 Removal of Carriage Motor [Step 1] Remove theprintermechanism (See section 3.2.4). [Step 2] Disconnect the motor cable from the carriage motor. [Step 3] Remove the belt tension sp[…]

• Page 53: Epson LX-1050+

  Disassembly and Assembly LX-105O+ Service Manual 3.2.5.2 Removal of Home-Position Sensor [Step 1] Remove the printer mechanism. (See section3.2. [Step 2] Turn the printer mechanism upside-down. [Step 3] Push in the notch securing the home-position base frame. 4) sensor, and remove the sensor from the Notch HP Sensor Figure 3-13. Home-Position Senso[…]

• Page 54: Epson LX-1050+

  LX-105O+ Service Manual Disassembly and Assembly 3.2.5.3 Removal of Platen [Step 1] Remove the printer mechanism. (See section 3.2.4) [Step2] Remove the paper tension unit. [Step3] Remove the C-ring (6) from the plate shaft. Crecent Ring Figure 3-14. Cresent Ring Removal [Step 4] Remove the two C.B.N.Stite (M3 x 6) screws securing the platen cover […]

• Page 55: Epson LX-1050+

  Disassembly and Assembly LX-105O+ Service Manual 3.2.5.4 Separate of Frame [Step 1] Remove the platen. (See section 3.2.5.3) [Step 2] Remove the printhead. (See section 3.2.1) [Step3] Remove the FFC, head cable holder (L), and head cable holder (R) from base frame. Head Cable’ Hoder L Head Cable Hoder R Figure 3-16. Head Cable Holder and FFC Remo[…]

• Page 56: Epson LX-1050+

  LX-105O+ Service Manual Disassembly and Assembly [Step 6] Push thetwonotches of the release lever outward. Remove the release lever. Figure 3-18. Release Lever Removal When the release lever is replaced, the markings should be analogously positioned. } Release Lever L o Marking f .’ Figure 3-19. Release Lever Replacement Rev. A 3-13[…]

• Page 57: Epson LX-1050+

  Disassembly and Assembly LX-105O+ Service Manual [Step 7] Separate the tractor cancellation cum from paper feed lever cancellation shaft. an -2iiB Paw ,Tractor Disengage Cam Lever Drive Shaft Separation of Tractor Diseugage Cam [Step 8] Turn the printer mechanism upside-down, and manually move the carriage unit until it is at the cut-out section […]

• Page 58: Epson LX-1050+

  LX-105O+ Service Manual Disassembly and Assembly [Step9] Remove the two C.B.S-tite. (0) (M3 x 6) screws which are securing the side frames to the base frame, and remove the side frames. Separate side frames from base frame. CBS(0) (M3~ 6) Screws Figure 3-22. Separate of Frame When the printer mechanism is separated, perform the following adjustment[…]

• Page 59: Epson LX-1050+

  Disassembly and Assembly LX-105O+ Service Manual 3.2.5.6 [Step 1] [Step 2] [Step 3] 3.2.5.7 [Step 1] [Step 2] [Step 3] Removal of Paper End Sensor Separate side frames from base frame. (See section 3.2.5.4) Loosen the two bends securing the paper end sensor to the paper guide at the back of the printer. Remove the paper end sensor. Bends r Figure 3[…]

• Page 60: Epson LX-1050+

  LX-105O+ Service Manual Disassembly and Assembly 3.2.5.8 Removal of Carriage [Step 1] %paratesideframes from base frame. (Seesection3.2.5 .4) [Step 2] Remove the HNO (M4) nut Securing theadjustlever, and remove the adjust lever. [Step 3] Remove the head adjust lever from thecarriage guide shaft. [Step 4] Remove thecarnageguide shaft and the carriag[…]

• Page 61: Epson LX-1050+

  Disassembly and Assembly LX-105O+ Service Manual [Step 2] Remove the tractor set L, the paper support, and tractor set R from the tractor and sprocket guide shafts. 4- T7 5- Figure NOTES FOR REASSEMBLY: 3-28. Extraction of Tractor Set When reassembling, align the phases as shown below. /a ,- ‘,.-’, Figure 3-29. Tractor Phase Alignment 3-18 Rev.[…]

• Page 62: Epson LX-1050+

  Chapter 4 Adjustments Table of Contents 4.1 ADJUSTMENTS 4-1 4.1.1 Carriage Motor Backlash Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1 4.1.2 Paper Feed Motor Backlash Adjustment. . . . . . . . . . . . . . . . . . . . . . . . . 4-2 4.1.3 Paten Gap Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . […]

• Page 63: Epson LX-1050+

  LX-105O+ Service Manual Adjustments 4.1 ADJUSTMENTS This section describes the adjustment procedures necessary when the LX-105O+ printer is reassembled or when parts are reinstalled or replaced. These procedures are necessary to ensure the correct operation of the printer. 4.1.1 Carriage Motor Backlash Adjustment This adjustment is required either […]

• Page 64: Epson LX-1050+

  Adjustments LX-105O+ Service Manual 4.1.2 Paper Feed Motor Backlash Adjustment This adjustment is required either when the paper feed motor is replaced or when its mounting position is shifted. 1. Separate side frames from base frame. (See section 3.2.5.4) 2. Loose the two CBS(0)(M3 x 6) screws on the paper feed motor. 3. Manually rotate the paper […]

• Page 65: Epson LX-1050+

  LX-105O+ Service Manual Adjustments 4.1.3 Platen Gap Adjustment Following the removal of the carriage guide shaft or adjust lever, or if printing is abnormal, the gap between the platen and the print head should be adjusted. 1. Remove the printer mechanism (See section 3.2.4), 2. Remove the printhead. Using tweezers, remove the ribbon mask. Remove […]

• Page 66: Epson LX-1050+

  Adjustments LX-105O+ Service Manual 8. insert the blade of a screwdriver into the countersink of carnage guide shaft. < Countersink> Large Small == /’ ” r— I I Carriage G;ide Shaft B I I Figure 4-5. Platen Gap Adjustment 9. Adjust the platen gap using a thickness gauge, while rotating carnage guide shaft in the direction of the arrow[…]

• Page 67: Epson LX-1050+

  LX-105O+ Service Manual Adjustments 4.2 61-DIRECTIONAL PRINTING ALIGNMENT ADJUSTMENT The bi-directional printing alignment adjustment is required when the printer mechanism or the main board is replaced. By performing this adjustment, a compensation value is determined for the mechanical control as to compensate the deviation of print position, whi[…]

• Page 68: Epson LX-1050+

  Chapter 5 Troubleshooting Table of Contents 5.1 OVERVIEW 5-1 5.2 SELF-DIAGNOSTIC FUNCTION 5-2 5.3 TROUBLESHOOTING 5-2 5.3.1 Troubleshooting of Abnormal Operation . . . . . . . . . . . . . . . . . . . . . . . . . 5-3 5.3.2 Unit Repair — TAMA Main Control Board . . . . . . . . . . . . . . . . . . . . . . . . 5-12 List of Tables Table 5-1. Motor Resis[…]

• Page 69: Epson LX-1050+

  LX-105O+ Service Manual Troubleshooting 5.1 OVERVIEW Troubleshooting most other serial impact dot matrix printers is difficult to perform, since there may be wide variety of problems. Therefore, the LX-105O+ have a sophisticated, built-in selfdiagnostic function that reduces troubleshooting time by identifying failed parts or components. The follow[…]

• Page 70: Epson LX-1050+

  Troubleshooting LX-1050+ Service Manual 5.2 SELF-DIAGNOSTIC FUNCTION This section describes the selfdiagnostic function, in which the controller automatically checks the operating conditions of each component. If any abnormality is detected, the printer displays an error message by beep sound. Table 5-3 lists the messages that tell you if service m[…]

• Page 71: Epson LX-1050+

  LX-105O+ Servjce Manual Troubleshooting 5.3 TROUBLESHOOTING This section describes the troubleshooting of abnormal operations and circuit board unit repair. 5.3.1 Troubleshooting of Abnormal Operation This section describes how to detect malfunctions, how to determine the cause, and what actions to take for various types of malfunctions. Each parag[…]

• Page 72: Epson LX-1050+

  Troubleshooting LX-105O+ Service Manual Table 5-5. The Printer does Not Operate at All Cause Step The TA-a filter unit maybe ~ dead. I The TAMA board maybe bead. 4 Checkpoint Finding Is connector CN9 on the TAMA board disconnected? Yes Is the fuse F1 on the TA-a filter unit blown? Yes With the power on, are there output of 26 VAC between two red wi[…]

• Page 73: Epson LX-1050+

  LX-105O+ Service Manual Troubleshooting Table 5-8. Carriage Error Displayed Cause Step Checkpoint Finding Solution Check the Turn the printer off and try to move carriage The carriage 1 the carriage manually. Does the No mechanism, and mechanism is bad. carriage move smoothly? replace or reassembly the bad patiS. Does the carriage move and clash Th[…]

• Page 74: Epson LX-1050+

  Troubleshooting LX-105O+ Service Manual Table 5-9. Paper is Not Fed (1) Cause Step Checkpoint Finding Solution The paper end sensor Does the sensor toggle? Replace the ‘ (Check with multimeter) No may be dead. paper end sensor. The release sensor Does the sensor toggle? Replace the may be dead. 2 (Check with multimeter) No release sensor. Disconn[…]

• Page 75: Epson LX-1050+

  LX-105O+ Service Manual Troubleshooting Table 5-10. Paper is Not Fed (2) Cause The paper end sensor may be dead. The release sensor may be dead. The paper feed motor may be dead. The paper path may be bad. Cause The paper end sensor is dead. 1 2 3 4 Checkpoint Does the sensor toggle? (Check with multimeter) Does the sensor toggle? (Check with multi[…]

• Page 76: Epson LX-1050+

  Troubleshooting LX-105O+ Service Manual Table 5-12. Abnormal Voltage Displayed Cause Step Checkpoint Finding The CR motor, PF Connector CN5 and CN8 motor or printhead coil 1 disconnect, and power on. Does printer not display abnormal Yes is short. voltage? The TAMA board may 2 — be bad. — Table 5-13. Incorrect SRAM Displayed Solution Replace CR[…]

• Page 77: Epson LX-1050+

  LX-105O+ Service Manual Troubleshooting Table 5-16. Self-test Printout has Poor Quality (1) Cause Step Checkpoint Finding Solution The printhead wire 1 Check the printhead. No Replace the may be broken. Are wires OK? printhead. Check the printhead coil resistance by multirneter. Yes Replace the .(refer to figure 5-1) printhead. Are coils short or o[…]

• Page 78: Epson LX-1050+

  Troubleshooting LX-105O+ Service Manual Table 5-17. Self-test Printout has Poor Quality (2) Cause Step Checkpoint Finding Solution Paper feed mechanism , Check the paper feed mechanism Replace or may be bad. gears and rollers. No reassemble Are there OK? gears and rollers. Disconnect CN5 on the TAMA board and check the coil resistance between: pin […]

• Page 79: Epson LX-1050+

  LX-105O+ Service Manual Troubleshooting Table 5-19. Abnormal Printing in On-line Mode (2) Cause Step Checkpoint Finding Solution Software setting may , Is it OK? No Set the software be bad. settings. Dip switch settings of ~ Is it OK? No Set the dip printer may be bad. switch settings. Interface cable may be ~ Change the interface cable. No Replace[…]

• Page 80: Epson LX-1050+

  Troubleshooting LX-105O+ Service Manual 5.3.2 Unit Repair — TAMA Main Control Board This section describes the problems related to the main control board (TAMA). The table below provides various symptoms, likely causes, and checkpoints. me checkpoints refer to waveforms, resistance, and other values to be checked to evaluate the operation of each c[…]

• Page 81: Epson LX-1050+

  LX-105O+ Service Manual Troubleshooting Table 5-21. Repair of the TAMA Board (Continued) Symptom rhe printer joes not >perate at all. Condition The CPU is not operating. cause rhe reset circuit s not operating. Selection of mntrol ROM is ~bnormal. 7AM is defective rhe CPU is jefective Checkpoint Oheck the voltage waveforms at the E24V and for th[…]

• Page 82: Epson LX-1050+

  Troubleshooting LX-105O+ Service Manual Table 5-21. Repair of the TAMA Board (Continued) e..— +A — Pfinr4itinn Cause Check~oint Solution !5-14 Rev. A[…]

• Page 83: Epson LX-1050+

  LX-105O+ Service Manual Troubleshooting Table 5-21. Repair of the TAMA Board (Continued) Rev. A 5-15[…]

• Page 84: Epson LX-1050+

  Chapter 6 Maintenance Table of Contents 6.1 MAINTENANCE 6-1 6.1.1 Preventive Maintenance . . . . . . . . . . 6.1.2 Lubrication and Adhesive Application . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1 List of Figures Figure 6-1. Figure 6-2. Correct Adhesive Application . . . . . . .[…]

• Page 85: Epson LX-1050+

  LX-105O+ Service Manual Maintenance 6.1 MAINTENANCE Proper maintenance assures optimal and long-term printer perforrnan ce and minimizes the occurrence of malfunctions. Be sure to disconnect the printmfiom the power supply before maintenance. Do not apply thinner, trichloroethylene, or ketone-based solvents to any of the printer’s plastic compone[…]

• Page 86: Epson LX-1050+

  Maintenance LX-105O+ Service Manual Table 6-2. Lubrication Points Ref. No. Lubrication Points Lubricant (1) Contact portion of paper feed lever drive shaft and paper feed lever G-26 (2) Contact portion of paper feed lever drive shaft and base frame G-26 (3) Oil pad o-2 (4) Contact portion of release lever and paper feed lever drive shaft G-26 (5) C[…]

• Page 87: Epson LX-1050+

  LX-105O+ Service Manual Maintenance Figure 6-2. Lubrication Points Rev. A 6-3[…]

• Page 88: Epson LX-1050+

  Appendix Table of Contents A.1 CONNECTOR SUMMARY A-1 A.2 CIRCUIT DIAGRAM A-5 A.3 CIRCUIT BOARD COMPONENT LAYOUT A-8 A.4 EXPLODED DIAGRAM A-9 Figure A-1. Figure A-2. Figure A-3. Figure A-4. Figure A-5. Figure A-6. Figure A-7. List of Figures Interconnection of Major Components . . . . . . . . . . . . . . . . . . . . . . A-1 TAMA Main Control Board C[…]

• Page 89: Epson LX-1050+

  LX-105O+ Service Manual Appendix A.1 CONNECTOR SUMMARY Figure below shows the intercomection between the major components of the LX-105O+. TAPNL- W Contrgrr~anel Model 3D60 Printer Mechanism ;; Inn::; Release PE HOME HEAD I I A II II 4> 1 I I I I I I I I I I I I _l t — . ——- L ———- HOST COMPUTER 1 Figure A-1. Interconnection of Major […]

• Page 90: Epson LX-1050+

  Appendix LX-105O+ Service Manual Table A-1. Connector Summary Connector Description Pins Reference TAMA Main Control Board I CN1 I Parallel interface I 36pin I Table 1-5 ] CN2 Optional interface board connector 26 pin Table A-2 CN3 Control panel 10 pin Table A-3 CN4 Release lever 2 pin Table A-4 CN5 CR motor and PF motor 12 pin Table A-5 CN6 PE sen[…]

• Page 91: Epson LX-1050+

  LX-105O+ Service Manual Appendix Table A-2. Connector Pin Assignment — CN2 Pin No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 Signal Name ERR PE D7 BUSY D6 ACK D5 IN ITRD4 STB D8 AC12 RESET AC12 D3 +5V D2 +24V D1 +12V Pls — SLCTIN GND TxD GND I/o o 0 I o I o I I I I I . 0 — I — I — I — I — I — o — Descripti[…]

• Page 92: Epson LX-1050+

  Appendix LX-105O+ Service Manual Table A-5. Connector Pin Assignment — CN5 Pin No. 1 2 3 4 5 6 7 8 9 10 11 12 Signal Name CRD CRB CRCDCOM CRABCOM CRC CRA PFD PFB PFCOM PFCOM PFC PFA I/o o 0 0 0 0 0 0 0 0 0 0 0 Description CR Phase D CR Phase B CR CD Common CRAB Common CR Phase C CR Phase A PF Phase D PF Phase B PF Common PF Common PF Phase C PF Pha[…]

• Page 93: Epson LX-1050+

  LX-105O+ Sewice Manual Appendix AC A INPUT , “’J) RI .O.lgF LED I G Figure A-3. TA-a Filter Unit Circuit Diagram E: Swl 4 SW2 3 200Q SW3 2 SW4 ~ 401 10 $ GREEN LED2 GREEN 8 I o LED4 1 ) Figure A-4. Control Panel Circuit Diagram GND ONLINE SW FF SW LF SW LD/EJ SW BUZZER READY LP ONLINE LP PE LP +5” Rev. A A-7[…]

• Page 94: Epson LX-1050+

  Appendix LX-105O+ Service Manual A.3 CIRCUIT BOARD COMPONENT LAYOUT c z II II .- . -a Figure A-5. TAMA Main Control Board Component Layout A-a Rev. A[…]

• Page 95: Epson LX-1050+

  LX-105O+ Service Manual Appendix A.4 EXPLODED DIAGRAM Figure A-6. LX-105O+ Exploded Diagram N A — Rev. A A%[…]

• Page 96: Epson LX-1050+

  Appendix LX-105O+ Service Manual Figure A-7. Printer Mechanism Exploded Diagram A-10 Rev. A[…]

• Page 97: Epson LX-1050+

  I EPSON OVERSEAS MARKETING LOCATIONS I EPSON AMERICA, INC. EPSON DEUTSCHLAND GmbH 20770 Madrona Avenue, Ztilpicher StraBe 6,4000 Dikseldorf 11 P.O. B OX 2842 F.R. Germany Torrance, CA 90509-2642 Phone: 0211-56030 Phone: (800) 922-8911 Fax: 0211-504-7787 Fax: (310) 782-5220 EPSON UK LTD. EPSON FRANCE S.A. Campus 100, Maylands Avenue, 68 bis, rue Mar[…]

• Page 98: Epson LX-1050+

  EPSON Printed in Japan 94.04-.2-G[…]