Troubleshooting For Control Panel Problems; Nothing Is Displayed On The Lcd; Control Panel Is Inoperable - Brother DCP-1510 Service Manual

4.6

Troubleshooting for Control Panel Problems

4.6.1 Nothing is displayed on the LCD

Step
1 Main firmware discrepancy
Connection failure of the panel flat
2
cable
Connection failure of the LCD
3
harness
4 LCD failure
5 Panel PCB failure
AC cord or low voltage power
6
supply PCB failure
7 Main PCB failure

4.6.2 Control panel is inoperable

<User Check>
- Check that the function lock is not set.
Step
1 Panel unit attachment failure
Connection failure of the panel flat
2
cable
3 Rubber key attachment failure
4 Rubber key failure
5 Panel PCB failure
Low voltage power supply PCB
6
failure
7 Main PCB failure
Cause
Install the latest main firmware.
Reconnect the panel flat cable.
Reconnect the LCD harness.
Replace the LCD.
Replace the panel PCB ASSY.
Replace the low voltage power supply PCB
unit.
Replace the main PCB ASSY.
Cause
Reattach the panel unit.
Reconnect the panel flat cable.
Reattach the rubber key.
Replace the rubber key.
Replace the panel PCB ASSY.
Replace the low voltage power supply PCB
unit.
Replace the main PCB ASSY.
1-59
Remedy
Remedy
Confidential