LG CT815 Service Manual page 159

6. BLOCK DIAGRAM
Audio Sub System
MSM7201A
LGE Internal Use Only
LINE_OP
LINE_ON
RCV_P
RCV_N
HPH_R
HPH_L
AUDIO_ADDR
AUDIO_I2C_SCL
AUDIO_I2C_SDA
MICBIAS
MIC_1P
MIC
MIC_1N
Audio Sub System
LM49100GR
EAR_SENSE_N
HS_MIC
CALL_KEY
Copyright © 2009 LG Electronics. Inc. All right reserved.
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SPKR_P
Receiver/
Speaker
SPKR_N
18x12
HSR
HSL
EAR JACK
3.5
Only for training and service purposes