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CONTENTS
Chapter 1 PRODUCT DESCRIPTION
1.1 Overview................................................................................................................9
1.2 Specification........................................................................................................11
1.2.1 Printing specification ................................................................................. 11
1.2.2 Character specification .............................................................................. 12
1.2.3 Control code .............................................................................................. 12
1.2.4 Paper feeding ............................................................................................. 12
1.2.5 Paper specification ..................................................................................... 13
1.2.6 Printing area ............................................................................................... 14
1.2.7 Adjust Lever .............................................................................................. 15
1.2.8 Ink .............................................................................................................. 15
1.2.9 Input data buffer ........................................................................................ 16
1.2.10 Electrical specification ............................................................................ 16
1.2.11 Acoustic noise ......................................................................................... 17
1.2.12 CE Marking ............................................................................................. 17
1.2.13 Safety Approvals ..................................................................................... 17
1.2.14 Reliability ................................................................................................ 17
1.2.15 Environmental condition ......................................................................... 17
1.3 Printer Function .................................................................................................19
1.3.1 Operator controls ....................................................................................... 19
1.3.2 Operate switch ........................................................................................... 19
1.3.3 Indicators ................................................................................................... 19
1.3.4 Panel Functions ......................................................................................... 19
1.3.5 Special settings mode (*1) ......................................................................... 20
1.3.6 Printer condition and Panel status ............................................................. 21
1.3.7 Printer Initialization ................................................................................... 22
1.3.8 Default Values ........................................................................................... 23
1.3.9 Errors ......................................................................................................... 23
1.4 Physical specification..........................................................................................24
Chapter 2 OPERATING PRINCIPLES
2.1 Overview..............................................................................................................26
2.2 Printer Mechanism.............................................................................................26
2.2.1 Printhead .................................................................................................... 27
2.2.2 Carriage Mechanism .................................................................................. 28
2.2.3 Paper Feeding Mechanism ........................................................................ 30
2.2.4 Paper Loading Mechanism (ASF Unit) ..................................................... 34
2.3 Electrical Circuit Operating Principles............................................................43
2.3.1 Power Supply Circuit Operating Principles .............................................. 43
2.3.2 C456 Main Board ...................................................................................... 46
Chapter 3 TROUBLESHOOTING
3.1 Overview..............................................................................................................54
3.1.1 Communication Error ................................................................................ 55
3.1.2 Too Late Throughput ................................................................................. 55
3.1.3 Status Monitor does not operate ................................................................ 56
3.1.4 Troubleshooting with LED Error Indications ........................................... 57
3.1.5 Isolating the Faulty Part on the Power Supply Board ............................... 77
3.1.6 Isolating the Faulty Part according to the Phenomenon ............................ 79
Chapter 4 DISASSEMBLY AND ASSEMBLY
4.1 Overview..............................................................................................................92
4.1.1 Precautions ................................................................................................ 92
4.1.2 Tools .......................................................................................................... 93
4.1.3 Screws ....................................................................................................... 94
4.1.4 Work Completion Check ........................................................................... 95
4.2 Disassembly.........................................................................................................96
4.2.1 Housing Removal ...................................................................................... 97
4.2.2 Board Assembly Removal ....................................................................... 101
4.2.3 ASF Unit Removal .................................................................................. 105