LG FH2 - Button Operation

3-13
ELECTRICAL TROUBLESHOOTING GUIDE
3. NO BUTTON OPERATION
YES
YES
YES
No Button operation
END
If no voltage change, check button and resister.
JACK2 4pin Voltage spec:
SW5: 0 V, SW4: 0.356 V, SW3: 0.837 V,
SW1: 1.324 V, SW11: 2.363 V.
JACK2 3pin Voltage spec:
SW10: 0 V, SW9: 0.356 V, SW8: 0.837 V,
SW7: 1.323 V, SW6: 1.979 V.
Re-soldering IC105.
NO
NO
Press button,
check JACK2 pin3, 4.
Check IC105 pin168, 169.