Low-Voltage Power Supply Pcb Failure; Modem Pcb Failure - Brother MFC-9130CW Service Manual

4.10.5 Low-voltage power supply PCB failure

Step
1
2
3
Note:
The irregular power supply detection error (Error code 0900) occurs when there is a large
distortion of the power supply voltage supplied to the machine. In this case, if the same
power supply is used, the same error might occur again even if the low-voltage power sup-
ply PCB ASSY is replaced. For this reason, be sure to ask the user to rearrange the instal-
lation environment.

4.10.6 Modem PCB failure

Step
1
2
3
Cause
Harness connection failure of
the low-voltage power supply
PCB
Low-voltage power supply
PCB failure
Main PCB failure
Cause
Harness connection failure of
the modem PCB.
Modem PCB failure
Main PCB failure
Check the harness connection of the
low-voltage power supply PCB and
reconnect it.
Replace the low-voltage power supply PCB
ASSY and reset the irregular power supply
detection counter.
Replace the main PCB ASSY.
Check the harness connection of the modem
PCB and reconnect it.
Replace the modem PCB ASSY.
Replace the main PCB ASSY.
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Remedy
Remedy
Confidential