Epson 890N Service Manual - Page 6

Contents - fx troubleshooting

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EPSON FX-890/2190 Table of Contents Revision B 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 Chapter 2 Operating Principles 2.1 Overview ...44 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 Chapter 3 Troubleshooting 3.1 Overview ...53 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 Troubleshooting Based on Symptoms 55 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 6

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EPSON FX-890/2190
Revision B
6
Table of Contents
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
Chapter 2 Operating Principles
2.1 Overview
............................................................................................................
44
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
Chapter 3 Troubleshooting
3.1 Overview
............................................................................................................
53
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 Troubleshooting Based on Symptoms
............................................................
55
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