2-20
Service Manual
25XX-100, -110
Intermittent problem service check
FRU/Symptom
Action
1
The printer
sometimes fails
before POST is
complete.
Check for the following:
1. Loose connectors. Reconnect all
connectors to the logic board.
2. Electrical noise or static discharge.
Check the following:
• Power supply ground
• Printer frame ground
• Printer interface cable is grounded and
shielded.
3. Intermittently low voltages.
Check for ac and all dc voltages and short
circuits on the logic board.
a. Check the user’s outlet voltage, and
ensure that it is within tolerance.
b. Check the continuity of the power
cord.
c. Disconnect the power supply cable
from connector CN12 on the logic
board. Turn the printer power on, and
check all dc output voltages at
CN12-1, CN12-2, and CN12-6.
Verify the following output voltages:
CN12 - 1 (+40 V dc ±10%)
CN12 - 2 (+40 V dc ±10%)
CN12 - 3 (GND)
CN12 - 4 (GND)
CN12 - 5 (Signal GND)
CN12 - 6 (+5 V dc ±5%)
CN12 - 7 (Power Save Mode)
• If the voltages are incorrect, replace the
power supply.
• If the failure remains, replace the logic
board.
Note
: When replacing the logic board, always
reset the bidirectional print adjustment. See
“Bidirectional print adjustment” on
page 4-4
.
Summary of Contents for 25**-100
Page 11: ...xi 25XX 100 110 ...
Page 62: ...2 42 Service Manual 25XX 100 110 ...
Page 74: ...3 12 Service Manual 25XX 100 110 ...
Page 118: ...4 44 Service Manual 25XX 100 110 Sensor removals ...
Page 124: ...4 50 Service Manual 25XX 100 110 ...
Page 127: ...Locations and connectors 5 3 25XX 100 110 Logic board 9w 24w ...
Page 130: ...5 6 Service Manual 25XX 100 110 Logic board 9w 24w ...
Page 132: ...5 8 Service Manual 25XX 100 110 Logic board 9w 24w ...
Page 134: ...5 10 Service Manual 25XX 100 110 Logic board 9w 24w ...
Page 136: ...5 12 Service Manual 25XX 100 110 Logic board 9w 24w ...
Page 138: ...5 14 Service Manual 25XX 100 110 Logic board 9w 24w ...
Page 140: ...5 16 Service Manual 25XX 100 110 Logic board 9w 24w ...
Page 142: ...5 18 Service Manual 25XX 100 110 Logic board 9w 24w ...
Page 144: ...5 20 Service Manual 25XX 100 110 Logic board 9w 24w ...
Page 146: ...5 22 Service Manual 25XX 100 110 Logic board 9w 24w ...
Page 148: ...5 24 Service Manual 25XX 100 110 Logic board 9w 24w ...
Page 152: ...5 28 Service Manual 25XX 100 110 ...
Page 160: ...7 2 Service Manual 25XX 100 110 Assembly 1 Covers ...
Page 162: ...7 4 Service Manual 25XX 100 110 Assembly 1 cont Covers ...
Page 164: ...7 6 Service Manual 25XX 100 110 Assembly 2 Carrier paper feed right side ...
Page 166: ...7 8 Service Manual 25XX 100 110 Assembly 2 cont Carrier paper feed right side ...
Page 168: ...7 10 Service Manual 25XX 100 110 Assembly 3 Carrier paper feed left side ...
Page 170: ...7 12 Service Manual 25XX 100 110 Assembly 3 cont Carrier paper feed left side ...
Page 172: ...7 14 Service Manual 25XX 100 110 Assembly 4 Electronics ...
Page 174: ...7 16 Service Manual 25XX 100 110 Assembly 5 ASF Roller support ...
Page 176: ...7 18 Service Manual 25XX 100 110 Assembly 6 ASF Side frame covers ...
Page 178: ...7 20 Service Manual 25XX 100 110 Assembly 7 Tractor 2 option ...
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Page 184: ...I 4 Service Manual 25XX 100 110 ...