LG -A258 Service Manual page 100

CHECKING FLOW
START
<Play any Sound file>
Can you hear
the sound from
the earphone?
LGE Internal Use Only
NO
Change the earphone
and try again
Can you hear
the sound from
the earphone?
NO
YES
Check the Audio signal
TP5, TP6. is it ok?
Yes
Check the Audio signal
of TP10, TP11. is it ok?
Yes
Earphone will work properly
When playing sound file.
Check the
Audio signal
TP3, TP4. is it ok?
No Check
the signal of
I2C CLK, DATA.
Is it ok?
Yes
No
No
Check the c
Onnection of CN203.
is it ok?
Yes
- 100 - Copyright © 011 LG Electronics. Inc. All right reserved.
4. TROUBLE SHOOTING
NO
Redownload SW
Or change main
board
No
Redownload SW
Or change U200
No
Re-soldering or
Replace CN203
Redownload SW
Or change U202
Only for training and service purposes