LG -MC2670 Service Manual page 48

LG-MC2670
Earphone detect problem
1
Level of pin 4 of CON401
about 1.6V?
5
Yes
Check soldering
U404
Yes
Check working
U404
Yes
4
Earphone sending path problem
3
Level pin4 of CON401
is about 1.6V
Yes
Level of C232 is
About a few tens
or hundreds VAC?
Yes
Earphone detect
problem
No
No
No
Earphone
sending
path problem
No
Re-solder
R206, R207
No
Re-solder
C232
45
Level of R206, R207
about 2.4V?
No
Re-soldering R206, R207
Re-solder U404
Replace U404
No
Does it work well?
Yes
Yes
4
Yes
5
Re-download
software
Does it work well?
No
Change main
board