Table Of Contents - Epson 680Pro - LQ B/W Dot-matrix Printer Service Manual

Chapter 1 PRODUCT DESCRIPTION
1.1 FEATURES ........................................................................................ 10
1.2 SPECIFICATIONS.............................................................................. 11
1.2.1 Physical Specification............................................................... 11
1.2.2 Printing Specification................................................................ 11
1.2.3 Paper Feeding.......................................................................... 12
1.2.4 Input Data Buffer ...................................................................... 12
1.2.5 Electric Specification ................................................................ 12
1.2.6 Environmental Condition .......................................................... 13
1.2.7 Reliability .................................................................................. 13
1.2.8 Safety Approvals ...................................................................... 13
1.2.9 Acoustic Noise.......................................................................... 13
1.2.10 CE Marking............................................................................. 13
1.3 INTERFACE ....................................................................................... 14
1.3.1 Parallel Interface (Forward Channel) ....................................... 14
1.3.2 Parallel Interface (Reserve Channel) ....................................... 17
1.3.3 USB Interface ........................................................................... 18
1.3.4 Prevention of Data Transfer Time-out ...................................... 19
1.3.5 Interface Selection.................................................................... 19
1.3.6 IEEE1284.4 Protocol ................................................................ 19
1.4 OPERATOR CONTROLS .................................................................. 20
1.4.1 Operating Switch ...................................................................... 20
1.4.2 Control Panel............................................................................ 20
1.4.3 Panel Functions........................................................................ 21
1.4.4 Printer Condition and Panel Status .......................................... 22
1.4.5 Printer Initialization ................................................................... 22
1.4.6 Errors........................................................................................ 23
1.5 PAPER ............................................................................................... 24
1.5.1 Paper Handling......................................................................... 24
1.5.2 Paper Specification .................................................................. 24
1.5.3 Printing Area............................................................................. 26
1.6 INK CARTRIDGE ............................................................................... 28
1.6.1 Black Ink Cartridge ................................................................... 28
1.6.2 Color Ink Cartridge ................................................................... 28
Chapter 2 Operating Principles
2.1 Overview............................................................................................. 30
2.1.1 Printer Mechanism ................................................................... 30
2.1.2 Printhead .................................................................................. 31
2.1.3 Carriage Mechanism ................................................................ 33
2.1.4 Paper Feeding Mechanism ...................................................... 34
2.1.5 Paper Loading Mechanism (ASF Unit)..................................... 35
2.1.6 Ink System Mechanism ............................................................ 38
2.2 Electrical Circuit Operating Principles ................................................ 40
2.2.1 C383 PSB/PSE board .............................................................. 40
2.2.2 C383 MAIN Board .................................................................... 43
Chapter 3 Troubleshooting
3.1 Overview ............................................................................................ 50
3.2 Troubleshooting with LED Error Indications ....................................... 51
Chapter 4 Disassembly and Assembly
4.1 Overview ............................................................................................ 62
4.1.1 Precautions .............................................................................. 62
4.1.2 Tools ........................................................................................ 63
4.1.3 Work Completion Check .......................................................... 64
4.2 Disassembly ....................................................................................... 65
4.2.1 Housing removal ...................................................................... 66
4.2.2 Operation Panel removal ......................................................... 67
4.2.3 Printhead removal .................................................................... 68
4.2.4 CR motor removal .................................................................... 71
4.2.5 Waste drain ink pad unit removal ............................................. 73
4.2.6 Circuit board removal ............................................................... 75
4.2.7 LD Roller removal .................................................................... 79
4.2.8 HP/PE Sensor removal ............................................................ 83
4.2.9 Ink system unit removal (Cap & Pump unit ) ............................ 85
4.2.10 Paper Eject Roller removal .................................................... 87
4.2.11 PF motor removal................................................................... 89
4.2.12 CR unit removal ..................................................................... 91
4.2.13 Paper feed roller removal ....................................................... 94
4.2.14 Disassembling ASF frame unit ............................................... 97
Chapter 5 Adjustment
5.1 Overview .......................................................................................... 101