LG -E445 Service Manual page 128

4.8.3 Main Mic Trouble Shooting
It's operating voice call(except speakerphone), voice recording, camcorder recording
LGE Internal Use Only
START
Check the Mic signal by test mode
or Voice recording.
Check Mic hole & rubber to
make the voice signal?
No
Check parts about Mic Bias
Mic works well?
No
Reconnect or change Mic
Voice signal OK?
No
Change MT6575(U201).
Mic works well?
No
Change Main Board
END
- 128 -
4. TROUBLE SHOOTING
Yes
Yes
Yes
Yes
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes