Epson 670 A-1

Appendix

Rev. A

A-1

4

Ref. No. Description Parts Price List Name

519 Combination Gear 9.17 Com bination Gear, 9.17

520 Combination Gear 14,26 Combination Gear, 14,26

521 Ratchet, RD Ratchet, RD

522 RD Platen Lever Lever, RD, Platen

523 Driven Pulley Pulley, Driven

524 CR Motor Cover Cover, Motor, CR

526 Release Shaft Shaft, Release

527 Release Lever Lever, Release

528 Release Gear Release Gear

529 PF Roller Driven Roller, Paper Load, Driven

530 Paper Guide Lever Change Lever, Paper Guide, Change

531 PF Holder Driven Holder, Paper Load, Driven

532 PF Bearing Driven Bearing, Paper Load, Driven

533 Paper Eject Roller Driven Roller, Paper Eject, Driven

534 Paper Eject Holder Lever Holder, Lever, Paper Eject

535 Paper Eject Lever Driven Lever, Paper Eject, Driven

536 Combination Gear 8,30 Com bination Gear, 8,30

537 Spur Gear 36 Spur Gear,36

538 (Spur) Gear 18 Spur Gear,18

539 Combination Gear, 16,16 Combination Gear, 16,16

540 Spur Gear 16 Spur Gear,16

541 Spur Gear 20 Spur Gear, 20

542 Spur Gear 20 Spur Gear, 20

543 Base Frame Frame, Base

544 CR Frame Frame, CR

545 CR Guide Guide, CR

546 Gap Adjustm ent Lever Lever, Gap, Adjust

547 Ribbon Mask Ribbon Mask

548 CR Motor Mounting Plate Mounting Plate, Motor, CR

549 Driven Pulley Lever Lever, Pulley, Driven

550 Paper Guide Paper Guide

551 Tractor Cover Cover, Tractor

552 Paper Eject Fram e Frame, Paper Eject

553 CR Guide Shaft Shaft, CR Guide

554 Planetary Shaft RD Shaft RD, Planet

555 Driven Pulley Shaft Lever Shaft, Lever, Pulley, Driven

556 PF Drive Shaft Shaft, Paper Load, Driven

557 TR Drive Shaft Shaft, TR Drive

558 TR Drive Shaft Shaft, TR, Guide

559 Front Slider Slider, Front

560 Oil Pad Oil Pad

561 Timing Belt Timing Belt

562 Platen Platen

563 PF Drive Roller Roller, PF, Drive

564 Paper Eject Drive Roller Roller, Paper Eject, Drive

565 (Left) Push Tractor Tractor, Left

566 (Right) Push Tractor Tractor, Right

567 Compress ion Spring 1.96 Compression Spring, 1.96

Table A-15. Parts Reference Table (Con.)

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