LG VX9100 Service Manual page 106

VX9100
Check the audio signal at R301, R302
Check the audio signal at C320, C321
Check the soldering of CON300
Replace Main B/D
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Only for training and service purposes
Checking Flow: Headset receiving path problem
Checking Flow: Headset receiving path problem
2
YES
NO
YES
NO
YES
NO
YES
Check the soldering at
R301, R302
YES
Resolder R301, R302
Resolder U301
with heat gun
Resolder CON300
- 105 -
Redownload S/W
NO
NO
Replace MSM or B/D
Replace U301
NO
LGE Internal Use Only