Brother MFC-9560CDW - Troubleshooting of the Control Panel; Nothing Is Displayed on the LCD; The Control Panel Does Not Work

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Confidential
3.11 Troubleshooting of the Control Panel
3.11.1 Nothing is displayed on the LCD
<User Check>
- Verify if the power switch is turned off.
- Check if the machine is in the Deep Sleep mode. (Touch panel model)
3.11.2 The control panel does not work
<User Check>
- Check whether the function lock is not set.
- Turn OFF and ON the power switch.
Step Cause Remedy
1 AC cord failure Replace the AC cord.
2 Connection between main
PCB and panel PCB
Connect the connector between the main
PCB ASSY and panel PCB ASSY correctly.
3 Connection between main
PCB and low-voltage power
supply PCB
Connect the connector between the main
PCB ASSY and low-voltage power supply
PCB ASSY correctly.
4 Inlet Harness ASSY failure Replace the inlet harness ASSY.
5 LCD or LCD unit failure Replace the LCD or LCD unit.
6 Panel PCB failure Replace the panel PCB ASSY.
7 High-voltage power supply
PCB failure
Replace the high-voltage power supply PCB
ASSY.
8 Low-voltage power supply
PCB failure
Replace the low-voltage power supply PCB
ASSY.
9 Main PCB failure Replace the main PCB ASSY.
Step Cause Remedy
1 Assembling failure of the
panel unit
Re-assemble the panel unit.
2 Connection between main
PCB and panel PCB
Connect the connector between the main
PCB ASSY and panel PCB ASSY correctly.
3 Rubber key failure Replace with the normal rubber key.
4 Fine adjustment of touch
panel misalignment (for
models with a touch panel)
Perform the fine adjustment of touch panel.
(Function code 61)
5 Panel PCB failure Replace the panel PCB ASSY.
6 Main PCB failure Replace the main PCB ASSY.