Control Panel Is Inoperable - Brother DCP-7080 Service Manual

4.6.3 Control panel is inoperable

<User Check>
- Turn the power switch OFF and then ON again.
Step
Rubber key attachment failure
1
(For models without touch panel)
Connection failure of the panel
2
harness
Connection failure of the key PCB
3 flat cable
(For models with touch panel)
Connection failure of the LVPS
4
harness
Rubber key failure
5
(For models without touch panel)
Panel PCB failure
6
Key PCB failure
7
(For models with touch panel)
Low-voltage power supply PCB
8
failure
Main PCB failure
9
Cause
Reattach the rubber key.
Reconnect the panel harness.
Reconnect the key PCB flat cable.
Reconnect the LVPS harness.
Replace the panel unit.
Replace the panel PCB ASSY.
Replace the panel unit.
Replace the low-voltage power supply PCB
ASSY.
Replace the main PCB ASSY.
2-81
Remedy
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