LG KG245 Service Manual page 86

CHECKING FLOW
SETTING : After initialize Agilent 8960, Test EGSM, DCS mode
START
Voltage across R202
= DC 2.5V ?
YES
Check the signal
Level at each side
of MIC.
Is it a few tens
mV AC?
YES
Check the soldering of
R210, R217,
C211, C215
YES
Microphone will work
properly.
NO
Voltage VMIC of U101
= DC 2.5V?
YES
Resolder R202 & R206.
NO
Replace microphone
NO
Resolder component
- 87 -
4. TROUBLE SHOOTING
NO
Replace U101