4. TROUBLE SHOOTING
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LGE Internal Use Only
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Only for training and service purposes
START
Can you
hear the sound from
The earphone?
Resolder J501 (3.5π EAR-MIC con)
No
Earphone will work properly
Yes
Can you hear the
sound from
the earphone?
Yes
Set the audio part of
the test equipment to PRBS
or Continuous wave
mode
No
Resolder J501
Can you hear the sound from
the earphone?
Yes
No
Can you hear
your voice from the earphone?
Change the
earphone
and try again
Resolder
FB501(TP01), FB50(TP0),
FB507(TP03), FB503(TP04),
FB506(TP05) C510(TP06)
C515(TP07)
No
Change the
earphone
and try again
Can you hear your
voice from
the earphone?
No
Resolder
C8(TP08), C9(TP09),
R51(TP10) C51(TP11),
C55(TP1) Or change the
M501(amp),U01(BB IC)
Yes
Set the audio part of the test
Equipment to echo mode