Oki ML490 Maintenance Manual - Page 5

Rs-232c Serial Interface Board Option

Get Oki ML490 PDF manuals and user guides View all Oki ML490 manuals
Add to My Manuals
Save this manual to your list of manuals

Page 5 highlights

3.3.20 Rear Tractor Assy 77 3.3.21 Rear Pressure Assy 78 3.3.22 Switch Lever ...79 4. ADJUSTMENT 80 5. CLEANING AND LUBRICATION 88 5.1 Cleaning ...88 5.2 Lubrication ...89 6. TROUBLESHOOTING AND REPAIR 97 6.1 Items to Check Before Repair 97 6.2 Troubleshooting Table ...97 6.3 Lamp Display ...98 6.4 Connection Circuit Check for Printhead and SP/LF Motor 102 6.5 Troubleshooting flow chart 104 APPENDIX A PCB LAYOUT 116 APPENDIX B SPARE PARTS LIST 117 APPENDIX C RS-232C SERIAL INTERFACE BOARD (OPTION 128 1. GENERAL ...128 2. OPERATION DESCRIPTION 128 2.1 Element Description 128 2.2 Circuit Description ...129 2.2.1 Operation at power on 129 2.2.2. RS-232C interface 129 2.3 Communication Procedure Flowchart 130 2.3.1 Mode a ...130 2.3.2 Mode b ...131 3. TROUBLESHOOTING FLOWCHART 132 3.1 Before Repairing a Fault 132 3.2 Troubleshooting ...132 3.3 Local Test ...135 3.3.1 Circuit test mode 135 42114101 Rev.1 5 /

  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15
  • 16
  • 17
  • 18
  • 19
  • 20
  • 21
  • 22
  • 23
  • 24
  • 25
  • 26
  • 27
  • 28
  • 29
  • 30
  • 31
  • 32
  • 33
  • 34
  • 35
  • 36
  • 37
  • 38
  • 39
  • 40
  • 41
  • 42
  • 43
  • 44
  • 45
  • 46
  • 47
  • 48
  • 49
  • 50
  • 51
  • 52
  • 53
  • 54
  • 55
  • 56
  • 57
  • 58
  • 59
  • 60
  • 61
  • 62
  • 63
  • 64
  • 65
  • 66
  • 67
  • 68
  • 69
  • 70
  • 71
  • 72
  • 73
  • 74
  • 75
  • 76
  • 77
  • 78
  • 79
  • 80
  • 81
  • 82
  • 83
  • 84
  • 85
  • 86
  • 87
  • 88
  • 89
  • 90
  • 91
  • 92
  • 93
  • 94
  • 95
  • 96
  • 97
  • 98
  • 99
  • 100
  • 101
  • 102
  • 103
  • 104
  • 105
  • 106
  • 107
  • 108
  • 109
  • 110
  • 111
  • 112
  • 113
  • 114
  • 115
  • 116
  • 117
  • 118
  • 119
  • 120
  • 121
  • 122
  • 123
  • 124
  • 125
  • 126
  • 127
  • 128
  • 129
  • 130
  • 131
  • 132
  • 133
  • 134
  • 135
42114101
Rev.1
5 /
3.3.20
Rear Tractor Assy
.................................................................................................
77
3.3.21
Rear Pressure Assy
..............................................................................................
78
3.3.22
Switch Lever
.........................................................................................................
79
4. ADJUSTMENT
...................................................................................................
80
5.
CLEANING AND LUBRICATION
.......................................................................
88
5.1
Cleaning
.............................................................................................................................
88
5.2
Lubrication
.........................................................................................................................
89
6.
TROUBLESHOOTING AND REPAIR
................................................................
97
6.1
Items to Check Before Repair
............................................................................................
97
6.2
Troubleshooting Table
.......................................................................................................
97
6.3
Lamp Display
.....................................................................................................................
98
6.4
Connection Circuit Check for Printhead and SP/LF Motor
...............................................
102
6.5
Troubleshooting flow chart
...............................................................................................
104
APPENDIX A
PCB LAYOUT
...............................................................................
116
APPENDIX B
SPARE PARTS LIST
....................................................................
117
APPENDIX C
RS-232C SERIAL INTERFACE BOARD (OPTION)
....................
128
1.
GENERAL
............................................................................................................................
128
2.
OPERATION DESCRIPTION
..............................................................................................
128
2.1
Element Description
..................................................................................................
128
2.2
Circuit Description
.....................................................................................................
129
2.2.1
Operation at power on
....................................................................................
129
2.2.2.
RS-232C interface
..........................................................................................
129
2.3
Communication Procedure Flowchart
.......................................................................
130
2.3.1
Mode
a
..........................................................................................................
130
2.3.2
Mode
b
..........................................................................................................
131
3.
TROUBLESHOOTING FLOWCHART
.................................................................................
132
3.1
Before Repairing a Fault
............................................................................................
132
3.2
Troubleshooting
.........................................................................................................
132
3.3
Local Test
..................................................................................................................
135
3.3.1
Circuit test mode
............................................................................................
135