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■ 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
Harness
between main
PCB and control
panel PCB
Is the harness
damaged?
Yes
Replace the harness with a
normal one.
4
Rubber Key Is the problem solved
after replacing the
rubber key?
Yes
Replace the rubber Key.
5
Control panel
PCB
Is the problem solved
after replacing the
control panel PCB?
Yes
Replace the control panel
PCB.
6
Main PCB Is the problem solved
after replacing the main
PCB ASSY?
Yes
Replace the main PCB
ASSY.