LG KM710 Service Manual page 82

Check the soldering of
R602, R604, C620, C624,C625,L600-601
Soldering is OK?
YES
Play the Ring tone.
Check the C615(SPKPA),C617(SPKNA)
The signal is a Analog
Check the Speaker contact
PAD of the FPCB
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Only for training and service purposes
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4. Trouble Shooting
NO
Re-solder R602, R604,
C620, C624,C625,L600-
601
NO
U104(DBB) is broken.
Change the board.
LGE Internal Use Only