Troubleshooting For Control Panel Problems; Nothing Is Displayed On The Led; Control Panel Is Inoperable; Only Specified Buttons Are Inoperable - Brother ADS-2000 Service Manual

4.5

Troubleshooting for Control Panel Problems

4.5.1 Nothing is displayed on the LED

<User Check>
- Check that the AC cord is connected correctly.
Step
1 AC cord failure
Connection failure of the panel PCB
2
harness
Connection failure of the top cover
3
sensor harness
4 Top cover sensor failure
5 Panel PCB failure
6 Power supply PCB failure
7 Main PCB failure

4.5.2 Control panel is inoperable

<User Check>
- Check that the function lock is not set.
Step
1 Panel ASSY attachment failure
Connection failure of the panel PCB
2
harness
Connection failure of the front cover
3
sensor harness
4 Front cover sensor failure
5 Rubber key failure
6 Panel PCB failure
7 Power supply PCB failure
8 Main PCB failure

4.5.3 Only specified buttons are inoperable

Step
1 Panel ASSY attachment failure
2 Rubber key failure
3 Panel PCB failure
Cause
Replace the AC cord.
Reconnect the panel PCB harness.
Reconnect the top cover sensor harness.
Replace the top cover sensor ASSY.
Replace the panel PCB ASSY.
Replace the power supply PCB ASSY.
Replace the main PCB ASSY.
Cause
Reattach the panel ASSY.
Reconnect the panel PCB harness.
Reconnect the front cover sensor harness.
Replace the front cover sensor ASSY.
Replace the rubber key.
Replace the panel PCB ASSY.
Replace the power supply PCB ASSY.
Replace the main PCB ASSY.
Cause
Reattach the panel ASSY.
Replace the rubber key.
Replace the panel PCB ASSY.
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Remedy
Remedy
Remedy
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