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LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
START
Is R310(JACK DETECT)
LOW?
NO
YES
Resolder CN200
YES
Earphone will work properly
Can you hear your
voice from
the earphone?
Set the audio part of the test
Equipment to echo mode
Change the earphone
and try again
NO
Can you hear
the sound from
the earphone?
Set the audio part of the test
equipment to PRBS or
Continuous wave mode
YES
YES
Resolder pin8 in CN300
CHECKING FLOW
Resolder R310
NO
YES
Can you hear
the sound from
the earphone?
NO
Change the earphone
and try again
NO
Can you hear your
voice from
the earphone?
NO
Resolder R305,R324,L302,L303
C202,C204(Call)
or
Resolder L301,R301,R300,
C302,C303
or
Change the U101
Check the
pin(#8) in CN300 is LOW?
Resolder R305,R324,L302,L303,
C206,C208 (Mp3)
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