Troubleshooting Of The Led Assy; Led Assy Failure - Brother MFC-9130CW Service Manual

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4.9

Troubleshooting of the LED ASSY

4.9.1

LED ASSY failure

- Turn ON the power, open the joint cover ASSY and back cover, and leave them as they are
for a while.
- Clean the LED ASSY.
Step
1
2
3
4
5
6
Cause
Flat cable connection failure
of the LED ASSY
Harness connection failure of
the LED control PCB
Flat cable failure of LED
ASSY
LED ASSY failure
LED control PCB failure
Main PCB failure
Check the flat cable connection of the LED
ASSY and reconnect it.
Check the harness connection of the LED
control PCB ASSY and reconnect it.
Replace the flat cable of the LED ASSY.
Replace the LED ASSY.
Replace the LED control PCB ASSY.
Replace the main PCB ASSY.
2-110
Remedy
Confidential
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