LG VX8350 Service Manual page 108

VX8350
Headset receiving path problem
The voltage level of C405,
C406 is about 1.8V?
Check the soldering of Pin
Change main board
Headset detect problem
Headset detect
Problem
Level of pin4 of CON301
Check the soldering of
EAR_JACK_SENSE/
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Only for training and service purposes
Headset receiving
Path problem
2
Yes
Yes
2,3 of CON301
Yes
1
Yes
is 1.65~2.1V?
Yes
U401
Yes
Level of
Yes
4
NO
Download S/W
NO
Re-soldering of Pin 2,3 of CON301
NO
Check the Soldering of
R308
Yes
NO
Replace U401
NO
Download S/W
107
NO
Re-solder R308
LGE Internal Use Only