Keypad And Touch Key Trouble; Only For Training And Service Purposes - LG KU580 Service Manual

4. TROUBLE SHOOTING

4.5 Keypad And Touch key Trouble

4.5.1 Keypad Trouble
START
Press the Keypad
Keypad operates well?
Check side key short?
1
Check BtoB connector short?
CN501(Main Bíd), CN100(Keypad)
Change Keypad
Keypad operates well?
Change Main Board
LGE Internal Use Only
YES
NO
YES
NO
YES
NO
NO
- 82 -
Resolder side key
(Camera key or volum key)
NO
Keypad operates well?
NO
Resolder BtoB connector
CN501(Main Bíd) or CN100(Keypad)
Keypad operates well?
NO
YES
Finish
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YES
YES

Only for training and service purposes