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PH690 Radio Maintenance Manual
42
6.8 Side Key Failure
Start
Side Key failure
Are the main PCB and
back cover assembled
correctly? Is the button
touch feeling normal?
No
Reassemble
correctly
Yes
Replace the
main PCB
End
Is the main PCB Side
Key metal dome
collapsed?
No
Yes
Repair the Side
Key metal dome
No
Is the contact of Side
Key FPC corroded or
dirty?
Yes
Clean or replace
the Side Key FPC