Only For Training And Service Purposes - LG -A155 Service Manual

4. TROUBLE SHOOTING
CHECKING FLOW
START
Resolder TP1
Check the TP2 is LOW?
YES
Is FBTP8(JACK DETECT)
LOW?
YES
Set the audio part of the test
equipment to PRBS or
Continuous wave mode
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
NO
Resolder TP 2
NO
Resolder TP1
Change t
NO
he earphone
and try again
Change
NO
the earphone
and try again
- 78 -
4. TROUBLE SHOOTING
Can you hear
the sound from
the earphone?
YES
Can you hear your
voice from
the earphone?
YES
85/140
Copyright © 2010 LG Electronics. Inc. All right reserved.
Resolder TP4, (Call)
NO
or
Resolder TP5
(Mp3)
Resolder
NO
TP6,TP7,TP8,TP9,
TP10,TP11,TP12

Only for training and service purposes