Epson 4003353 UNIT REPAIR - , C137, MAIN BOARD

Tivubleshootina

sewkemnua/

5.4

UNIT REPAIR - C137 MAIN BOARD

This

sxtion

desuibes

the problems related to the main

contder

board

(C137

MAIN).

The

table

below provides various symptoms, likely causes, and checkpoints.

‘I&

checkpoints refer to

waveforms, resistance, and other values to be checked to evaluate the operation of each

component.

Table 5-6. Repair of the

C137

MAIN

5-10

Rev.

Contents

Main EPSON TERMINAL PRINTER n As SERVICE MANUAL EPSON c -. Nagano, C PRECAUTIONS DANGER - ii - WARNING PREFACE The contents of this manual are subject to change without notice. iv - REVISION SHEET Revision Issue Date Page /Contents TABLE OF CONTENTS vi - Chapter 1 Product Description Table of Contents 1-9 -., 1.1 FEATURES k \ Figure 1-1. Exterior View of the \(A~i.,et) Page Table 1-3. Character Tables o 1.2.2 Paper Handling Specifications 1.2.3 Paper Specifications Table 1-4. Cut Sheet Paper Specifications Table 1-5. Envelope Specifications c & -P Figure 1-3. Printable Area for Cut Sheet c Figure 1-4. Printable Area for Table 1-6. Adjust Lever Setting Figure 1-5. Adjust Lever 1.2.4 Ink Cartridge Specifications - Black 1.2.5 Electrical Specifications Table 1-7. Rated Electrical Ranges 1.2.6 Environmental Conditions Table 1-8. Acceptable Environmental Conditions Range Temperature/l=lumidity Figure 1-6. \ 1.3 INTERFACE SPECIFICATIONS L.& 1.3.1 Serial interface Specifications L_- Figure 1-7. Data Transmission Timing Table 1-9. Signal and Connector Pin Assignments c for . Parallel Interface 1.3.2 Parallel Interface Specifications X-OIVX-OFF and DTR Table 1-10. Un 1.4.1 Control Panel ~. Buttons I 1.4.2 Panel Operation at Power On 1.4.3 Default Settings 1.4.3.1 Default Setting Items ESC Printing Direction and 1-14. 1.4.3.2 Changing the Default Settings Table 1-15. Language Selection 10 Table 1-16. Feature Selection Table 1-17. Character Table Selection c. , . c 1.4.4 Error Conditions Table 1-18. Error Indications 1.4.5 Printer Initialization Initialization 1.4.5.2 ., 1---1 M i-l :0 n L c Figure 1-13. Housing Chapter 2 Operating Principles Table of Contents 2-i Head). . . . . . . 2.4 List of Figures List of Tables 2.1 OVERVIEW 2.2 OPERATING PRINCIPLES OF THE PRINTER MECHANISM *-J : Figure 2-1. Printer Mechanism Manual 2.2.1 Printer Mechanism ,avi,~et~L~ti,.YerPiezo) >Noue Figure 2-2. Structure of Normal state Injectir state Figure 2-3. Principles of the Printing Operation S* -k (, Figure 2-4. Microwave Mode Operation klul Carriage Drive Mechanism Table 2-1. Carriage Drive Motor Specifications Table 2-2. Drive Terms r 1 - Table 2-5. Drive Terms Figure 2-7. Paper Feed Mechanism 2.2.4 Ink System This fbllowing A 1 [ a)br/blackhead) . . . . . - Clatch -, Figure h-+ Page Table 2-6. Pump Mechanism Operation 0: u 0: Figure 2-13. Pump Operation Opemting 1- (i Wiper(Cleaning Hook 2.3 OPERATING PRINCIPLES OF THE ELECTRICAL CIRCUITS Elecrical Figure 2-16. Block Diagram of the Circuit 2.3.1 Operating Principles of the Power Supply Circuit d is fed back to the primary switching circuit through a return Biock 2-17. Power Supply Circuit =ery Figure 2-18. Main Control Circuit Block Diagram 2.3.2.1 Reset Circuits contains Figure 220. L Figure 2-19. Reset 2.3.2.2 Sensor Circuits mechanism to determine whether there is paper in the printer or not. A LOW level the signal * c w Carriage Motor Drive Circuit and speed v-+-l a Figure 2-22. Serial Data Transfer Procedure 2.3.2.4 Paper Feed Motor Drive Circuit Table 2-9. Paper Feed Motor Drive Modes Figure 2-23. Paper Feed Motor Drive Circuit Diagram c) I--d 2S.2.5 64-bit parallel CLAT DMA Controller Figure 2-26. DMA Controller Operation D-RAM Refreshment Controller (CPU-2CAS Figure 2-27. D-RAM Cycle Timings CPU H8 (ICI) D-RAM (IC5) 79 28 14F HWR 80 OCAS LWR, n 9 , Figure 2-29. Relation of Ink System & Carriage Operation 2.4.1 Ink Operations r 2.4.1.1 Power On Operation :::::;::;::;;;;rmd cnT::y;:g;;sT Cleaning Selection Mode CL I (Normal Cleaning): CL3 CL2 (Power Cleaning): c? 2.4.1.5 Print Start 62 2.4.1.4 Power Off Operation Sets the 2.4.1.6 Refresh Operation 2.4.1.7 the ink Standby Operation 2.4.1.8 Fail Absorbing Operation c 4. than ( button Wiping Operation 2.4.1.10 2. 4. 2. Sets e) 7 2.4.1.16 Carriage Lock Set (Performed when start: = Ink Level Counter R (On the RAM) (Monochrome= Rb, start: (Blaclq Timer Fail Flushing Counter (Black, c m, 4 CMY= 4. CL Chapter3 Disassembly and Assembly MAIN 3.1 OVERVIEW 3.1.1 Precautions for Disassembling the Printer Disassembly and Assemb/y Stylus Color Service I%!!??& P t 3.2 DISASSEMBLY AND ASSEMBLY Mi3nual u C137 D&u c. c . L ,,: :.[[[[[[[ from CN1l, L 12) Figure 3-6. Main Controller Removal 3.2.4 Printer Mechanism (M-4AIO) Removal CBN(M4X13) Figure 3-7. Printer Mechanism 3.2.5 Printer Mechanism Disassembly Printhead Wc: 3.2.5.1 Unit Removal Page 3.2.5.2 Carriage Unit Removal CBN(0)( Hgure Figure 3-10. Front Frame Removal { 3-10 Pump Unit Removal feL7@ - @ Figure 3-12. Pump Unit Removal CBN(M3X5) Cleaner Head Replacement f- . CR Motor Removal Figure 3-14. CR Motor Removal PF Motor Removal Figure 3-15. PF Motor Removal k. Figure 3-16. Carriage Home Position Sensor Removal 3.2.5.8 PE Sensor Removal Bottom Frame Figure 3-17. PE Sensor Removal II Figure 3-19. Paper Feed Roller Assembly Removal Paper Assembly Removal Tension Roller Assembly ! CBN(M3X5) \ N Chapter 4 Adjustments I head) . . . . . . . . . . . . . . . . . . . . . Table of Contents 4.1 OVERVIEW 4.1 OVERVIEW Table 4-1. Required Adjustments Head gap 4.1.1 Destination Data Writing Operation r . Bi-D 4.1.2 (Bidirectional Printing) Alignment Adjustment 4.1.3 Head Gap Adjustment I 1 d Figure 4-1. Head Gap Adjustment Sample Stylus Color Service o Rev. A4-5 c1 E 0.25 BK; L J Figure 4-5. Spacer Selection Figure 4-6. Removing the Rubber Cap II o Figure 4-7. Spacer (Spacer Angular I Angular Replacement Position) Replacement Method ! %- Figure 4-8. Black-Color Head Vertical Adjust Confirmation Pattern PMting Conception black- color head vertical adjustment is based upon the black head angle. Figure 4-10. Removing the Rubber Cap CMY: 1020627). 1020626 o (Linear Spacer Replacement Position) 4.1.6 Color Head Angle Adjustment r Figure 4-13. Color Head m- L +*~ *T / / a Angular Spacer (For Color Head) D, angular spacer YMC angular spacer YMC-B I 10. t 41?E5iirTu~J~@ Figure 4-17. Spacer Angular Replacement Method(YMC) 4.1.7 Platen Gap Adjustment Table 4-2. Gap and Adjustment Direction Cw Ccw Cw Figure 4-18. Adjusting the Paper Gap lzzzzzz----- Yl Figure 4-19. Confirming the Gap 4.1.8 Internal Timer Reset Operation Chapter 5 Troubleshooting 5.1 OVERVIEW w &l Figure 5-1. Troubleshooting Process Table 5-1. Motor Resistance Flowchart Table 5-2. Sensor Status o . . . : 5.2 UNIT LEVEL TROUBLESHOOTING Table 5-4. Symptom and Problem 5.2.1 Printer does not operate at power on c1 START / Mthea)rlect W** + .: ----- f Stylus Co/or service Manual Troubleshooting r AS-5 YES v (See the 5.2.2 Error is detected ~ J END Stylus Color Service & 5.2.4 4 Twbleshootina Printer does not feed the paper correctly m START END Page UNIT REPAIR - C137 5.4 MAIN BOARD table r 1 Amtud 5.5 UNIT REPAIR -PRINTER MECHANISM (M-4A1O) Any problems related to W printer Foreign Mmually PrhMer Repair of the Table 5-7. Repair of the Printer Mechanism (Cont.) Tbubkshodng (-J Table Chapter 6 Maintenance 6.1 PREVENTIVE MAINTENANCE AND ADHESIVE LUBRICATION 6-1 6.2 SERVICE MAINTENANCE 6.1 PREVENTIVE MAINTENANCE af-- 6.2.1 mnuai 6.2 SERVICE MAINTENANCE 6.3 LUBRICATION AND ADHESIVE (lo) Table 6-1. Recommended Lubricants Table 6-2. Lubrication and Adhesive Points Page Page Appendix A.1 EXPLODED DIAGRAM A.4 A-16 q-cl-tor Components Table A-1. Connector Summary Pin Pin Assignments - Table A-2. Connector Locatfon Table A-3. Connector Pin Assignments - CN2 Table A-4. Connector Pin Assignments - Table A-5. Connector Pin Assignments - CN3 CN4 Connector Table Table A-9. Connector A-10. Connector Pin Assignments - Table A-8. Connector Pin Assignments - I/o CN12 I/o StY/us Color Service Manual Amendix A-15 II Figure A-3. C137 MAIN A-9 Service Manual Board Circuit n w l m tl IL! T ~n+-: h- -n-= ( 7)7 SW6 ax 4 1 .+ -w- !5 !4 R Figure A-8. C137 PSB/PSE Board Component Layout EPSON OVERSEAS MARKETING LOCATIONS