LG -D385 Service Manual page 167

Check the ear-jack condition Good?
Check the Signal level at TP1 (C9021)
LGE Internal Use Only
START
Yes
Yes
Check Bias Voltage Good?
Yes
FM will work properly
No
No
No
- 167 - Copyright © 2014 LG Electronics. Inc. All right reserved.
3. TROUBLE SHOOTING
Replace ear-jack
Replace U5100
Replace U2100
Only for training and service purposes