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Level 3 Repair
8-23
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8-3-1-10. Key Input Part
Key Input does not work
Volume Key
working?
Yes
No
Yes
SIM Switch key
working?
Check the TACT300,TACT301 (crack, open,
etc) & change the TACT300,TACT301
No
Check the TACT302 (crack, open, etc) &
change the TACT302
Check the S/W setting
(key auto lock, etc)
Yes
Function Key &
Qwerty Key
working?
No
Check Dome sheet (crack, open, etc) &
Change Dome sheet & UCP200
Yes
Key LED working?
No
Check U310, LED300~304 (crack, open, etc)
& Resolder U310, LED300~304, R327~R331
