Sub Mic - LG -H815 Service Manual

3.19.4 Audio - Sub MIC
A Sub MIC is located at the bottom of PCB. It operates in case of voice call (handset noise suppression on/
Speaker Phone noise suppression on), camcorder recording (zooming)
Checking Flow
Check the MIC signal by test mode
or Voice recording.
Check MIC-
hole and mesh
and MIC- Rubber
Voice Signal OK
Check parts about
MIC Bias VA6928
works well
Check parts about
MIC Output(FB6921)
works well ?
Change Main Board
LGE Internal Use Only
Start
Yes
?
No
Yes
?
No
Yes
No
End
Folder
MIC Rubber
PCB TOP
MIC Mash
Circuit Diagram
55
3. TROUBLE SHOOTING
Image
FB6921
VA6928
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