Oki ML490 Maintenance Manual - Page 115

Is +12V, -8V supplied on Control Board?

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 115 highlights

10-2 (RS232C I/F) Printer I/F pin assignment. Is the correct cable used? Yes No Change I/F cable TXD RXD SSD DTR DSR 2 pin, 3 pin, 11 pin, 20 pin, 6 pin. Is ALARM LED blinking? No Yes See tables 6.2 and 6.3 for the troubleshooting. Make sure of the parameters for RS232C in the menu are correct. Baud rate Bit length Parity Protocol Busy signal and its polarity Remedied? No Yes Control Board End Is +12V, -8V supplied on Control Board? Yes No Remove RS232C I/F Board +12V (pin3) 20 CN2 1 0V (pin8) -8V (pin1) Is the +12V, -8V supplied on the Control Board? No Yes Replace RS232C I/F Board Replace Control Board Replace RS232C I/F Board Remedied? No Yes End Replace Control Board 42114101 Rev.1 115 /

  • 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
115 /
10-2 (RS232C I/F)
Printer I/F pin assignment.
Is the correct cable used?
TXD
2
pin,
RXD
3
pin,
Yes
No
SSD
11
pin,
DTR
20
pin,
Change I/F cable
DSR
6
pin.
Is ALARM LED blinking?
No
Yes
See tables 6.2 and 6.3 for the troubleshooting.
Make sure of the parameters for RS232C in the menu are correct.
Baud rate
Bit length
Parity
Protocol
Busy signal and its polarity
Remedied?
No
Yes
End
Is +12V, -8V supplied on Control Board?
Yes
No
Remove RS232C I/F Board
Is the +12V, -8V supplied on the Control Board?
No
Yes
Replace RS232C I/F Board
Replace Control Board
Replace RS232C I/F Board
Remedied?
No
Yes
End
Replace Control Board
Control Board
20
0V (pin8)
-8V (pin1)
+12V (pin3)
CN2
1