Only For Training And Service Purposes - LG MG295 Service Manual

4. TROUBLE SHOOTING
Checking Flow
START
Resolder J200
Is voltage level at R216
About 2.8v?
YES
Is JACK_DETECT
High(2.8V)?
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 R216, R220
NO
Resolder R207
NO
Change the earphone
and try again
NO
Change the earphone
and try again
- 68 -
Can you hear NO
Resolder R217, C222
the sound from
the earphone?
YES
NO
Can you hear your
voice from
the earphone?
YES
Copyright © 2007 LG Electronics. Inc. All right reserved.

Only for training and service purposes

Or Change the U103
Resolder R221,C218
Or Change the U103