Troubleshooting For Control Panel Problems; Nothing Is Displayed On The Lcd; Control Panel Is Inoperable - Brother ADS-2600W Service Manual

4.5

Troubleshooting for Control Panel Problems

4.5.1 Nothing is displayed on the LCD

<User Check>
- Check that the AC power cord is connected correctly.
Step
1 AC power cord failure
Connection failure of the key PCB
2
harness
Connection failure of the panel PCB
3
harness
Connection failure of the LCD flat
4
cable
Connection failure of the top cover
5
sensor harness
6 Top cover sensor failure
7 Key PCB failure
8 Power supply PCB failure
9 Main PCB failure

4.5.2 Control panel is inoperable

<User Check>
- Check that the function lock is not set.
Step
1 Key PCB attachment failure
Connection failure of the key PCB
2
harness
Connection failure of the front cover
3
sensor harness
4 Front cover sensor failure
5 Rubber key failure
6 Key PCB failure
7 Power supply PCB failure
8 Main PCB failure
Cause
Replace the AC power cord.
Reconnect the key PCB harness.
Reconnect the panel PCB harness.
Reconnect the LCD flat cable.
Reconnect the top cover sensor harness.
Replace the top cover sensor ASSY.
Replace the key PCB ASSY.
Replace the power supply PCB ASSY.
Replace the main PCB ASSY.
Cause
Reattach the key PCB.
Reconnect the key PCB harness.
Reconnect the front cover sensor harness.
Replace the front cover sensor ASSY.
Replace the rubber key.
Replace the key PCB ASSY.
Replace the power supply PCB ASSY.
Replace the main PCB ASSY.
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Remedy
Remedy
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