2-18
Service Manual
24XX-200
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 248X-200 series
Page 11: ...xi 24XX 200 ...
Page 56: ...2 38 Service Manual 24XX 200 ...
Page 67: ...Repair information 4 5 24XX 200 Covers removals ...
Page 103: ...Repair information 4 41 24XX 200 Sensors removals ...
Page 111: ...Locations and connectors 5 3 24XX 200 Logic board 9w 24w ...
Page 114: ...5 6 Service Manual 24XX 200 Logic board 9w 24w ...
Page 116: ...5 8 Service Manual 24XX 200 Logic board 9w 24w ...
Page 118: ...5 10 Service Manual 24XX 200 Logic board 9w 24w ...
Page 120: ...5 12 Service Manual 24XX 200 Logic board 9w 24w ...
Page 122: ...5 14 Service Manual 24XX 200 Logic board 9w 24w ...
Page 124: ...5 16 Service Manual 24XX 200 Logic board 9w 24w ...
Page 126: ...5 18 Service Manual 24XX 200 Logic board 9w 24w ...
Page 128: ...5 20 Service Manual 24XX 200 Logic board 9w 24w ...
Page 130: ...5 22 Service Manual 24XX 200 Logic board 9w 24w ...
Page 132: ...5 24 Service Manual 24XX 200 Logic board 9w 24w ...
Page 136: ...5 28 Service Manual 24XX 200 ...
Page 144: ...7 2 Service Manual 24XX 200 Assembly 1 Covers ...
Page 146: ...7 4 Service Manual 24XX 200 Assembly 1 cont Covers ...
Page 148: ...7 6 Service Manual 24XX 200 Assembly 2 Carrier paper feed right side ...
Page 150: ...7 8 Service Manual 24XX 200 Assembly 2 cont Carrier paper feed right side ...
Page 152: ...7 10 Service Manual 24XX 200 Assembly 3 Carrier paper feed left side ...
Page 154: ...7 12 Service Manual 24XX 200 Assembly 3 cont Carrier paper feed left side ...
Page 156: ...7 14 Service Manual 24XX 200 Assembly 4 Electronics ...
Page 158: ...7 16 Service Manual 24XX 200 Assembly 5 ASF Roller support ...
Page 160: ...7 18 Service Manual 24XX 200 Assembly 6 ASF Side frame covers ...
Page 162: ...7 20 Service Manual 24XX 200 Assembly 7 Tractor 2 option ...
Page 164: ...7 22 Service Manual 24XX 200 ...
Page 168: ...I 4 Service Manual 24XX 200 ...