Brother MFC-7380

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