LG -T500 Service Manual page 96

CHECKING FLOW
SETTING : After initialize Agilent 8960, Test EGSM900, DCS mode ( or GSM850, PCS mode )
Check microphone sound hole
Make a phone call,
then check C236(TP02) mic bias
comes from U201?
Level at each side of MIC501.
Check the soldering of
Microphone will work
LGE Internal Use Only
START
YES
Check the signal
Is it a few tens
mV AC?
YES
R517, R518
(TP05,06)
YES
properly.
NO
1. Check mic Bias signal line
2. Change the U201
NO
Change the microphone
NO
Re-solder component
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4. TROUBLE SHOOTING
Only for training and service purposes