LG GX500 - Microphone Trouble

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4. TROUBLE SHOOTING
GX500 Operational Description Revision A
LG Electronics 86/143 LGE Property
4.7 Microphone trouble
Check Points
-Microphone hole
-Mic. Bias & signal line
Figure 4-18. Microphone
Checking Flow
STAR
T
Mic bias ON
(2.5V)when
Assemble
Check mic. Bias line
Yes
No
Check microphone sound
hole
Check Signal
C307, C316 (2.
5V)
Replace microphone
(MIC301)
No
L303 C307 C316
MIC301