Troubleshooting Of The Control Panel; Nothing Is Displayed On The Lcd; Unable To Perform Panel Operation; Lamp Malfunction - Brother MFC-9130CW Service Manual

4.6

Troubleshooting of the Control Panel

4.6.1

Nothing is displayed on the LCD.

Step
1
2
3
4
5
6
7
8
4.6.2

Unable to perform panel operation

<User Check>
- Check whether the function lock is not set.
Step
1
2
3
4
5
4.6.3

Lamp malfunction

<User Check>
- Check whether sleep mode is ON.
- Using the menu, check whether lamps can be turned ON.
Step
1
2
3
Cause
AC cord failure
Incompatible firmware
Panel PCB harness
connection failure
LCD harness connection
failure
LCD failure
Panel PCB failure
Low-voltage power supply
PCB failure
Main PCB failure
Cause
Panel cover ASSY
attachment failure
Panel PCB harness
connection failure
Panel PCB failure
Low-voltage power supply
PCB failure
Main PCB failure
Cause
Panel PCB harness
connection failure
Panel PCB failure
Main PCB failure
Replace the AC cord.
Install the latest firmware.
Check the panel PCB harness connection
and reconnect it.
Check the LCD harness connection and
reconnect it.
Replace the LCD.
Replace the panel PCB ASSY.
Replace the low-voltage power supply PCB
ASSY.
Replace the main PCB ASSY.
Re-assemble the panel cover ASSY.
Check the panel PCB harness connection
and reconnect it.
Replace the panel cover ASSY.
Replace the low-voltage power supply PCB
ASSY.
Replace the main PCB ASSY.
Check the panel PCB harness connection
and reconnect it.
Replace the panel cover ASSY.
Replace the main PCB ASSY.
2-105
Remedy
Remedy
Remedy
Confidential