The Control Panel Cover Assy Does Not Work - Brother MFC-9320CW Service Manual

8.2

The control panel cover ASSY does not Work.

<User Check>
- Check whether the function lock is not set.
Step
1 Key sticking
2 Connection
between main PCB
and panel PCB
3 Rubber key
4 Panel PCB
5 Main PCB
Cause
Is there a key on the
panel stuck?
Are the main PCB and
panel PCB connected
properly?
Is the problem solved
after replacing the
rubber key?
Is the problem solved
after replacing the panel
PCB ASSY?
Is the problem solved
after replacing the main
PCB ASSY?
Check
Result
Yes
No
Yes
Yes
Yes
3-94
Remedy
Clean up the control
panel cover ASSY, or
remove the burrs from
control panel cover
ASSY and panel keys.
Reconnect the
connector properly.
Replace the rubber Key.
Replace the panel PCB
ASSY.
Replace the main PCB
ASSY.
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