LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
- 69 -
START
Is JACK_DETECT
High(2.8V)?
NO
YES
Resolder CN202
YES
Earphone will work properly
Can you hear your
voice from
the earphone?
Set the audio part of the test
Equipment to echo mode
Change the earphone
and try again
NO
Can you hear
the sound from
the earphone?
Set the audio part of the test
equipment to PRBS or
Continuous wave mode
YES
YES
Resolder R2181, R222
Is voltage level at R218
About 2.5v?
Change the U102
NO
YES
Can you hear
the sound from
the earphone?
NO
Change the earphone
and try again
NO
Can you hear your
voice from
the earphone?
NO
Resolder FB802, C233
Or Change the U102
Resolder R227,C226
Or Change the U102
CHECKING FLOW
Содержание KP175
Страница 135: ...Note ...