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Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
4. TROUBLE SHOOTING
Insert Headset
& Make a call
Change the Main b’d
MIC_BIAS(C445)
is 2.3V ?
YES
NO
Can you scoping
Some sound signal
at R412?
Change the MIC
YES
YES
make some sound or
voice to MIC
Work well?
END
YES
Can you scoping
Some sound signal
at FB401,C252?
Check the IC401 or
Change the Main B’d
NO
NO
YES
Start
Содержание Vodafone GM750
Страница 1: ...Service Manual Model GM750 Internal Use Only Service Manual GM750 Date September 2009 Issue 1 0 ...
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