Table Of Contents - Epson 890N - FX B/W Dot-matrix Printer Service Manual

EPSON FX-890/2190
Chapter 1 PRODUCT DESCRIPTIONS
1.1 Features ............................................................................................................... 9
1.2 Interface ............................................................................................................. 23
1.2.1 Parallel interface (Forward channel) ........................................................ 23
1.2.2 Parallel interface (Reverse channel) ......................................................... 25
1.2.3 USB Interface ........................................................................................... 26
1.2.4 Optional Interface ..................................................................................... 27
1.2.5 Type-B Interface communication specification ........................................ 27
1.2.6 Interface selection ..................................................................................... 28
1.2.7 IEEE1284.4 protocol ................................................................................ 29
1.3 Operation ........................................................................................................... 30
1.3.1 Control panel ............................................................................................ 30
1.3.2 Switches .................................................................................................... 30
1.3.2.1 Operation in Normal Mode ............................................................... 30
1.3.2.2 Operations at Power-on ..................................................................... 31
1.3.2.3 Operation in Default Setting Mode ................................................... 31
1.3.3 Indicators ( LEDs ) ................................................................................... 31
1.3.3.1 Indications in Normal Mode .............................................................. 31
1.3.4 Buzzer ....................................................................................................... 33
1.3.5 Default Setting .......................................................................................... 33
1.3.5.1 Setting Method .................................................................................. 33
1.3.5.2 Setting Items ...................................................................................... 34
1.3.6 EEPROM Clear Function ......................................................................... 35
1.3.7 Bi-D Adjustment ....................................................................................... 36
1.4 Dimensions and Weight ................................................................................... 37
1.4.1 FX-880T+ Mode ....................................................................................... 41
1.4.1.1 Setting of FX-880T+ mode ............................................................... 41
1.4.1.2 Supported commands ........................................................................ 41
1.4.1.3 Default setting items .......................................................................... 42
1.4.1.4 Printer defaults .................................................................................. 42
1.4.1.5 Action of the printer .......................................................................... 42

Table of Contents

Chapter 2 Operating Principles
2.1 Overview ............................................................................................................ 44
Chapter 3 Troubleshooting
3.1 Overview ............................................................................................................ 53
3.2 Troubleshooting Based on Symptoms ............................................................ 55
2.1.1 Printer Mechanism .................................................................................... 45
2.1.1.1 Printhead ............................................................................................ 45
2.1.1.2 Paper Feed Mechanism ..................................................................... 45
2.1.1.3 Carriage Movement Mechanism ....................................................... 45
2.1.1.4 Tractor Feed Mechanism ................................................................... 45
2.1.1.5 Platen Gap Adjustment Mechanism .................................................. 45
2.1.1.6 Ribbon Feed Mechanism ................................................................... 46
2.1.1.7 Sensors .............................................................................................. 46
2.1.2 Circuit Operation ...................................................................................... 47
2.1.2.1 C524 MAIN Board ............................................................................ 47
2.1.2.2 C524 PSB/PSE/PSH Power Supply Circuit ...................................... 50
3.1.1 Specified Tools ......................................................................................... 53
3.1.2 Procedure for Troubleshooting ................................................................. 53
3.1.3 Preliminary Checks ................................................................................... 54
3.1.4 Error .......................................................................................................... 54
3.2.1 Printer fails to operate when power is turned on ...................................... 55
3.2.2 No LED on Control Panel lights up even with power turned on .............. 56
3.2.3 Abnormal operation of Carriage at power on ........................................... 56
3.2.4 Abnormal paper feeding ........................................................................... 57
3.2.5 Printing is faulty during self-test, but carriage operation is normal ......... 58
3.2.6 Abnormal operation of Control Panel ...................................................... 59
3.2.7 Abnormal on-line operation (normal self-printing, though) ..................... 59
3.2.8 Abnormal operation of ribbon .................................................................. 60
3.2.9 Abnormal operation of Carriage Unit ....................................................... 61
3.2.10 Faulty print ............................................................................................. 62
Revision B
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