Only For Training And Service Purposes - LG -C300 Service Manual

CHECKING FLOW
SETTING : After initialize Agilent 8960, Test EGSM900, DCS mode ( or GSM850, PCS mode )
START
Check microphone sound hole
Make a phone call,
then check C231 mic bias signal
comes from U101?
YES
Check the signal
Level at each side of MIC201.
Is it a few tens
mV AC?
YES
Check the soldering of
C233, C236
YES
Microphone will work
properly.
Copyright © 2010 LG Electronics. Inc. All right reserved.

Only for training and service purposes

NO
1. Check mic Bias signal line
2. Change the U101
NO
Change the microphone
NO
Resolder component
- 95 -
4. TROUBLE SHOOTING
2. TROUBLE SHOOTING
LGE Internal Use Only