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8-3-1-9. Key Input Part
Key Input does not work
SIM Switch key
working?
Yes
Function Key &
3x4 Key working?
Yes
Key LED working?
Yes
Check the S/W setting
(key auto lock, etc)
No
Check the TACT300 (crack, open, etc) &
No
Check Dome sheet (crack, open, etc) &
No
Check U302, LED300~305 (crack, open, etc)
& Resolder U302, LED300~305, R323~R328
SAMSUNG Proprietary-Contents may change without notice
This Document can not be used without Samsung's authorization
change the TACT300
Change Dome sheet & UCP200
8-21
Level 3 Repair
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