Epson 670 - page 130

LQ-670 Service Manual

Rev. A A-1

3

Ref. No. Description Parts Price List Name

100 Upper Housing Housing, Upper

101 Front Cover Cover, Printer

102 Lower Housing Assembly Housing, Assembly, Lower

103 Logo Plate Logo Plate

104 Printer Cover Assembly Cover Assembly, Printer; B

105 Front Edge Guide Assembly Sheet, Guide As sembly

106 Upper Shield Board Shield Plate, Upper

107 Shield Plate Shield Plate

108 Wire Cover Cover, Wiring

109 I/F Guide Board Guide, I/F Board

110 Grounding Plate Grounding Plate

111 Upper I/F Grounding Plate Grounding Plate, I/F, Upper

112 I/F Grounding Plate Grounding Plate, IF

113 Knob Knob

114 Mechanism Fixing Screw Printer Mechanism Mounting Screw

115 Upper Cover Connector Cover, Connector, Upper

116 C.P. Screw M3X4 C.P. Screw M3X4

117 C.B.(O) Screw M4 X8 C.B.(O) Screw M4 X8 F/ZG

118 Plain Washer 3X0.5X8 Plain Washer 3X0.5X8

119 C.B.S. Screw M3X4 C.B.S. Screw M3X4

120 C.B.S. Screw M3X6 C.B.S. Screw M3X6

121 C.B.B. Screw M3X12 C.B.B. Screw M3X12

122 C.B.B Screw M4X14 C.B.B Screw M4X14

123 Hexagon Nut M4 Hexagon Nut M4

124 Harness Harness

200 Main Board Assembly Board Assembly, Main

300 Power Supply Board Assembly Board Assembly, Power Supply

330 Harness Harness

400 Power Cable Power Cable

450 Panel Unit Panel Unit

500 Printer Mechanism Printer Mechanism, M-5060-100

501 Platen Shaft Holder Platen Shaf t Holder

502 Platen Shaft Holder(Gray) Platen Shaft Holder (Gray)

503 Belt Drive Pulley F Belt Driven Pulley F

504 Cut Washer Cut Washer

505 Plain Washer 4.2X0.3X8 Plain Washer 4.2X0.3X8, L/NA

506 Spur Gear 20 Spur Gear, 20

507 Paper Support Paper Support

508 Base Rubber Base Rubber

509 Adjust Lever Holder Holder, Adjust Lever

510 Parallelism Adjust Bushing Bushing, Parallelism, Adjust

511 Lever Cap Cap, Lever

512 (Front) PE Detector Holder Holder, Detector, PE, Front

513 Upper Cable Holder Holder, Cable, Upper

514 Lower Cable Holder Holder, Cable, Lower

515 Ribbon Mask Holder Holder, Ribbon, Mask

516 Rear Slider Slider, Rear

517 Combination Gear 10, 17.5 Combination Gear, 10, 17.5

518 Spur Gear 11 Spur Gear, 11

Table A-14. Parts Reference Table

Contents

Main NOTICE Copyright 1997 by SEIKO EPSON CORPORATION Nagano, Japan PRECAUTIONS WARNING CAUTION WARNING CAUTION PREFACE Page Page Chapter 1 Product Descriptions 1.1 Specifications 1.1.1 Features Page 1.2 Hardware Specifications 1.2.1 Printing Method 1.2.2 Printing Specifications Rev. A 1- 1.2.3 Paper Handling Specifications 1.2.4 Paper Specification Rev. A 1- Note1) Note3): Note2): Note2): Page Page 1.2.5 Printable Area Rev. A 1-11 Note *1) Printable Area Printable Area BM 1.2.6 Ribbon Cartridge 1.2.7 Input data buffer Note*) 1.2.8 Electrical Specification 1.2.9 Reliability 1.2.10 Environmental Condition 1.2.11 Safety Approvals 1.2.12 CE Marking 1.2.13 Acoustic Noise 1.3 Firmware Specification 1.3.1 Control Codes and Fonts Page 1.3.2 Interface Specification 1.3.2.1 Parallel interface (Forward channel) Page 1.3.2.2 Parallel Interface (Reverse channel) Note*): Rev. A 1-21 1.3.2.3 Optional Interface 1.3.2.4 Interface Selection 1.3.3 Prevention Hosts from Data Transfer Timeout 1.4 Operation 1.4.1 Control Panel 1.4.1.1 Usual Operation Page 1.4.1.2 Switches 1.4.1.3 Indicators(LED) 1.4.1.4 Buzzer 1.4.2 Default Setting Notes. 1.4.3 Bi-d Adjustment 1.4.4 Initialization 1.4.5 Errors 1-3 1.5 Main Components 1.5.1 C214 Main Board 1.5.2 C214PSB Board Page Chapter 2 Operating Principles Rev. A 2-1 2.1 Printer Mechanism Operation 2.1.1 Printing Mechanism Page 2.1.2 Carriage Mechanism Page 2.1.3 Ribbon Advance Mechanism 2- 2.1.4 Paper Advance Mechanism 2.1.4.1 Paper Advance Mechanism 2.1.4.2 Paper Advance Detector Mechanism Page 2.1.4.3 Release Lever Mechanism Release Lever Tractor Gear Roller, PF Drive Tractor Transmission Gear 2.1.5 Platen Gap Adjustment Rev. A 2-11 2.2 Power Supply Operation 2.2.1 Power Supply Circuit 2.2.1.1 Power Supply Overview 2.2.1.2 Power Supply Circuit Operation Rev. A 2-1 2.2.2 Control Circuit 2.2.2.1 Operating Principles of the Control Circuit 2.2.2.2 EEPROM Control Circuit 2.2.2.3 System Reset Circuit 2.2.2.4 Power Off Detector Circuit 2.2.2.5 Print Head Driver Circuit 2.2.2.6 CR Motor Driver Circuit 2.2.2.7 PF Motor Driver Circuit 2.2.2.8 Operation Panel Control Circuit Page Chapter 3 Disassembly and Assembly Page 3.1 Overview 3.1.1 Precautions for Disassembling the Printer 3.1.2 Tools WARNING 3-2 3.1.3 Service Check After Repair 3.1.4 Specifications for Screws 3-4 3.2 Printer Disassembly and Assembly Figure 3-1. Disassembly Flowchart The flowchart below show you the basic order for disassembly. Before disassembling any part of the printer, note the warnings in Section 3.1.1. START 3.2.1 HOUSING, UPPER Removal 3-6 3.2.2 Printer Mechanism Removal 3.2.3 C214 MAIN Board Removal 3.2.4 C214 PSB/PSE Board Removal 3.2.5 EP-ROM Replacement CHECK POINT 3.2.6 Printhead Removal 3.2.7 Ribbon Mask Removal 3.2.8 PAPER EXIT ASSY. Removal 3.2.9 Ribbon Mask Holder Removal 3.2.10 PW Detector (Top) Removal 3.2.11 MOTOR, CR Removal 3.2.12 Carriage Assy. Removal CHECK POINT Page 3.2.12.1 RATCHET, RD Removal 3.2.13 PAPER GUIDE Removal Page Chapter 3 Disassembly and Assembly Rev. A 3-21 3-22 3.2.14 Platen Removal 3.2.15 MOTOR, PF Removal Page 3.2.19 DETECTOR, PE, FRONT Removal 3.2.20 DETECTOR, PE, REAR Removal 3.2.21 LEVER, RELEASE Removal 3.2.22 Tractor ASSY. Removal Page Rev. A 4-1 4.1 Adjustment Overview Note*2) Note*1) 4.1.1 Required Adjustments 4.1.2 Required Adjustment Tools 4.2 Adjusting and Resetting the Printer Do not rotate the platen roller during this adjustment. 4.2.1 Platen Gap Adjustment Rev. A 4- 4.2.2 Factory Setting Page Rev. A 4- 4.2.3 Bi-d Adjustment Page Page 5.1 Overview 5- 5.2 Unit Level Troubleshooting Page Page Page Page Rev. A 5- Page View A R F R L 1-24 :Wire Number C :Common Terminal T:Thermistor Terminal Note*) Rev. A 5-11 5.3 Repairing the Power Supply Circuit Board Page Page 5.4 Repairing the Main Board Page Page 5.5 Repairing the Printer Mechanism Page Page 6.1 Preventive Maintenance Page Appendix A.1 Connector Summary A- Rev. A A- A- Page Page Page Page Page Page Page Page Page A-1 Page A.5 Dimension and Weight EPSON OVERSEAS MARKETING LOCATIONS As of September, 1996