- 102 -
LGE Internal Use Only
Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
LGE Internal Use Only
START
NO
YES
Change the earphone
and try again
Can you hear
the sound from
the earphone?
Set the audio part of the test
equipment to PRBS or
Continuous wave mode
CHECKING FLOW
Check L205, U103
YES
Can you hear
the sound from
the earphone?
NO
Is CN302
(JACK DETECT : TP1)
LOW?
When you call,
can you hear sound at center speaker
in speakerphone mode?
YES
NO
Check U203, FB301,FB302,
Resolder U103,Q201,R208,U202,C202,C204,
205,R205,C217,U205,
Can you hear
the sound from
the earphone in the mp3 mode?
Resolder C221,C227
yes
NO