LG -S310 Service Manual page 84

4.9.4 Headset sound play Trouble
Check Headset sound signal path
-MUIC (U400), WM9093(IC500)
-HS_OUT_ L/R (TP1, TP2)
-HS_ L/R (TP3, TP4)
FM_AUDIO_R
FM_AUDIO_L
HS_L
HS_R
SPK_N
SPK_P
AUD_I2C_SCL
AUD_I2C_SDA
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Only for training and service purposes
TP
C506 1u C2
IN1-
C507 1u C1
IN1+
TP4
C508 1u D2
IN2-
WM9093ECS-R
C509 1u D1
IN2+
EUSY0403901
D3
IN3-
C3
IN3+
C515
Figure 4.9.4.1 Headset Circuit for sound Check
C5 FB502
OUT+
D5 FB503
OUT-
A2
IC500
HPL
A1
HPR
B5
CPVDD
A3
CPVSS
A4
CP
A5
CN
C514 2.2u
C516
2.2u
2.2u
1V8_AMP
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4. TROUBLE SHOOTING
220
220
TP1
FB504 1000
FB505 1000
TP2
LGE Internal Use Only