LG LG9200 Service Manual page 75

4. TROUBLE SHOOTING
Earphone Trouble (5)
1. Earphone Detection pr oble m
The Volt age at " ADIN1"
is 0V?
Yes
The vo lt age at R221
is 0.02V ~ 0.25V?
Yes
The ABB is out o f or der.
Change the board.
The so ld erin g of R216, R217
is O K?
Yes
No
The so ld erin g of J201
is O K?
Yes
The ABB is out o f or der.
Change the board.
Yes
No
The solde ring of R2 21
is O K?
- 76 -
Reso ld er the
No
R216, R217.
No
Reso ld er the J201.
No
Reso ld er the R221.