Brother MFC-8880DN - Page 163

3-72
Confidential
■ The control panel does not work.
<User Check>
- Check whether the function lock is not set.
Step Possible cause Check
Result Remedy
1
Key sticking Is there a key on the
control panel stuck?
Yes
Clean up the panel cover,
or remove the burrs from
panel cover and panel
keys.
2
Connection
between main
PCB and control
panel PCB
Are the main PCB and
control panel PCB
connected properly?
No
Reconnect the connector
properly.
3
Rubber Key Is the problem solved
after replacing the
rubber key?
Yes
Replace the rubber Key.
4
Control panel
PCB
Is the problem solved
after replacing the
control panel PCB?
Yes
Replace the control panel
PCB.
5
Main PCB Is the problem solved
after replacing the main
PCB ASSY?
Yes
Replace the main PCB
ASSY.