LG -T370 Service Manual page 87

START
Can you hear the
sound from
the earphone?
Yes
Set the audio part of the test
Equipment to echo mode
Can you hear
your voice from the earphone?
Earphone will work properly
LGE Internal Use Only
Resolder J501 (3.5π EAR-MIC con)
Change the
No
earphone
and try again
Change the
No
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
- 87 - Copyright © 01 LG Electronics. Inc. All right reserved.
4. TROUBLE SHOOTING
No
Resolder J501
Resolder
No
FB501(TP01), FB50(TP0),
FB507(TP03), FB503(TP04),
FB506(TP05) C510(TP06)
C515(TP07)
Resolder
No
C8(TP08), C9(TP09),
R51(TP10) C51(TP11),
C55(TP1) Or change the
M501(amp),U01(BB IC)
Only for training and service purposes