Button Operation - LG FH2 Service Manual

ELECTRICAL TROUBLESHOOTING GUIDE
3. NO BUTTON OPERATION
No Button operation
Press button,
check JACK2 pin3, 4.
Check IC105 pin168, 169.
END
YES
YES
YES
If no voltage change, check button and resister.
JACK2 4pin Voltage spec:
SW5: 0 V, SW4: 0.356 V, SW3: 0.837 V,
NO
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.
NO
Re-soldering IC105.
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