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Epson LX-1050+ manuel d'utilisation

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Table des matières du manuel d’utilisation

  • Page 1

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

  • 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[...]

  • 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,[...]

  • 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[...]

  • Page 5

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

  • 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

    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

    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

    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

    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

    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

    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

    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

    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

    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

    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

    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

    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

    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

    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

    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

    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

    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

    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

    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

    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

    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

    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

    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

    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

    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

    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

    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

    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

    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

    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

    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

    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

    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

    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

    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

    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

    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

    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

    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

    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

    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

    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

    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

    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

    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 8) screw securing the frame ground wire. Remove the two C. B.B-tite (M4[...]

  • 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[...]

  • 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[...]

  • 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 [...]

  • 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[...]

  • 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[...]

  • 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 [...]

  • 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[...]

  • 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[...]

  • 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[...]

  • 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.[...]

  • 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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [...]

  • 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 [...]

  • 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 [...]

  • 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 [...]

  • 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[...]

  • 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[...]

  • 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[...]

  • 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[...]

  • 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[...]

  • 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[...]

  • 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[...]

  • 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[...]

  • 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[...]

  • 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[...]

  • 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[...]

  • 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[...]

  • 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 [...]

  • 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[...]

  • 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[...]

  • 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[...]

  • 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[...]

  • Page 83

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

  • 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 . . . . . . .[...]

  • 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[...]

  • 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[...]

  • Page 87

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

  • 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[...]

  • 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 [...]

  • 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[...]

  • 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[...]

  • 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[...]

  • 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[...]

  • 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[...]

  • Page 95

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

  • Page 96

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

  • 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[...]

  • Page 98

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