Epson 4003353 m

Sty/us Color Service ManualOperating Principles

2.3.2 Operating Principles of the Main Control Circuit

The main control circuit of this printer is the C137 MAIN board. This circuit is controlled by the16-bit CPU H8/3003 (ICI), running at 14.7456 MHz. This CPU has a unique architecture capable ofhandling data on the data bus at either an 8-bit or 16-bit bus width. Because of this, a 16-bit or 8-bitdata bus width-type ROM is used on this board, increasing the internal processing speed. Also, theCPU has a unique architecture capable of the refresh control function. A 4M D-RAM (2CASmethod) on this board is controlled by the CPU itself. The CPU controls the serial interface control(RS-422 for Mac).Gate array E05A96 (IC2) manages

printhead

drive control, external Centronics@ parallel I/F,extension CG board and the control panel, and the controls that create the 4-bit signal for thecarriage or the paper feed motor. (The carriage and paper feed motor are controlled by the currentduty data.)This board is also equipped with EEPROM 93C46 (IC12) to store certain parameters, such as theprinter mechanism control parameter, default setting parameters, as well as a special counter valueused for

printhead

(ink management) protection.The timer IC NJU6355E (IC7) counts each time the printer is cleaned and keeps track of how longthe printer is not used, thereby allowing the printer to be cleared only when necessary.

Note:l Note:2

mmmm

EEPROM

Reset

(Power)

RS-422

L

1 1

I

I1

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Type B l/F

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Reflesh

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(IC12)

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93C46

uru

4

E05A96

4

B

(IC13)

H8/3003 (IC2) PST592D

(IC8)

(lCl)

M51955B

Panel

DMAREQ

II

Seria\W#

Cl 37 MAIN Board

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

=ery

NJ U6355E

(Timer

Counter)

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Carriage

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From A

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Black/Color head

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SED5620

➤ Black 64 nozzle

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Common driver Circuit

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(UI ,U2)

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SLA7041MS(IC14,15)

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Note:l 32-pin IC socket only

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(NLSP and European ver. only)

Motor Driver Note:2 8M is only equipped in NLSP ver.

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Figure 2-18. Main Control Circuit Block Diagram

Reset

(Logic)

Rev. A

2-15

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