LG MG200 Service Manual page 73

4. TROUBLE SHOOTING
START
Does
the Audio profile change
to the earphone
mode?
Can you
hear the sound
from the
earphone?
Yes
2. Sending Path problem
Insert the earphone
into the headset.
No
1. Earphone detection problem
Set the audio part of test
equipment to PRBS or c
ontinuous wave mode
No Soldering
of C240, R224, R225
Yes
Soldering of J201
Yes
The earphone is OK?
Yes
The ABB is out of order.
Change the board.
- 72 -
cf) PRBS : Pseudo Random Bit Sequence
No
is OK?
No
is OK?
No
Resolder the
C240, R224, R225
Resolder the
J201
Change the
Earphone.