LG G5300 Service Manual page 85

4. TROUBLE SHOOTING
The signal flow of
the microphone to
U103.
MIC activating signal : Mic is
activated when this signal
goes to high.
R206, R208,
C206, C211
C208 0.1u
R206
VINNORP
100
C211 0.1u
R208
VINNORN
100
R213
MIC_ONOFF
1.5K
2V45_VAN
C204
R202
R202
1K
C202
C204
NC 10uF
R204
(2012) (2012)
R204
1.2K
C209
C210
39p
39p
C213
R211
39p
1.2K
3
Q203
2
2SC5585
1
CLOSE TO MIC
The voltage at pin. 3 of
Q203 goes to almost 0V
when the mic is activated.
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MIC201
1
2
mic