4. TROUBLE SHOOTING
- 101 -
LGE Internal Use Only
Copyright © 011 LG Electronics. Inc. All right reserved.
Only for training and service purposes
CHECKING FLOW
START
Resolder J501
(3.5
Ɋ
EAR-MIC con)
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 J501
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
FB501,FB502,
FB508,FB509,
C539,C540
Resolder
FB504,R508,R509,
C520,C518,C521,
C522,C517,C519
Or change the
M501(amp),
U201(BB IC)
Can you
hear the sound from
The earphone?