LG -ID3100 Service Manual page 35

LG-ID3100
Checking Flow
SETTING : "Ringers" at Sounds menu
START
NO
Check the contact of speaker or
Does Speaker work Properly?
Replace the speaker
Yes
Check the signal
NO
Replace U201(QSC6010) or board
TP1, TP2 of U308,
U309
Yes
Check the signal
NO
Re-soldering or
level at TP3, TP4
Replace the U308, U309
of U308, U309
Yes
Speaker will work properly
LGE
LG Electronics Inc.
33/57 LGE Internal Use Only