LG -A230 Service Manual page 92

CHECKING FLOW
START
Can you hear
the sound from
the earphone?
YES
Set the audio part of the test
Equipment to echo mode
NO
Can you hear your
voice from
the earphone?
Earphone will work properly
LGE Internal Use Only
Resolder J200 (3.5 Ear-Mic con)
NO
Change the earphone
and try again
Change the earphone
and try again
Can you
hear the sound from
The earphone?
YES
Set the audio part of the test
equipment to PRBS or
Continuous wave mode
Can you hear
the sound from
the earphone?
YES
Can you hear your
voice from
the earphone?
YES
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4. TROUBLE SHOOTING
NO
Resolder J200
NO
Resolder
R246,R247,FB200,FB201
NO
Resolder headset MIC circuit
Or change the
IC200(amp),U101(BB IC)
Only for training and service purposes