LG -E450 Service Manual page 173

Check the ear-jack condition
Check the components condition
LGE Internal Use Only
START
Good?
Yes
Good? (R520,L501,L500)
Yes
Check Bias Voltage
Good?
Yes
FM will work properly
No
No
Give the addition solder in
No
- 173 - Copyright © 2013 LG Electronics. Inc. All right reserved.
4. TROUBLE SHOOTING
Replace ear-jack
(R520,L501,L500)
Replace U600
Only for training and service purposes