Sub Mic1 Trouble Shooting - LG -D855 Service Manual

3.13.5 Sub MIC1 Trouble Shooting

A sub MIC1 (called MIC 2 during Loopback Test) is located beside reciver.
It operates in case of camcorder recording
LGE Internal Use Only
START
Check the Mic signal by test mode
1. Check Mic
hole and mesh and Mic Rubber
Voice Signal OK?
No
2. Check Mic Bias(1.77V) (VA6928)
works well ?
No
3. Check Mic Output (FB6921) works well ?
No
Change Main Board
End
- 160 - Copyright © 2014 LG Electronics. Inc. All right reserved.
3. TROUBLE SHOOTING
Yes
Yes
Yes
Only for training and service purposes