LG -S310 Service Manual page 87

4. TROUBLE SHOOTING
4.9.5 Headset Receiving voice Trouble
Check Headset voice signal path
-MUIC (U400), WM9093(IC500)
-HS_OUT_L/R (TP1, TP2)
-SPK_P/N (TP3, TP4)
-RCV_ SPK_P/N (TP5, TP6)
FM_AUDIO_R
FM_AUDIO_L
HS_L
HS_R
SPK_N
SPK_P
AUD_I2C_SCL
AUD_I2C_SDA
AVDD28_MBUF
AVDD28_BUF
AU_MICBIAS_P
AU_MICBIAS_N
AVDD28_AFE
AVDD28_GSMRFTX
LGE Internal Use Only
TP
C506 1u C2
IN1-
C1
C507 1u
IN1+
TP4
D2
C508 1u
IN2-
WM9093ECS-R
C509 1u D1
IN2+
EUSY0403901
D3
IN3-
C3
IN3+
C515
Figure 4.9.5.1 WM9093 check point
J1
AU_MOUTL
J2
AU_MOUTR
K4
AU_FMINL
K3
AU_FMINR
K2
AU_OUT0_N
K1
AU_OUT0_P
C260 39p
L2
L1
C248 1u
M2
AU_VREF_N
C249 1u
M1
AU_VREF_P
C250 0.1u
N1
AU_VIN0_P
C251 0.1u
N2
AU_VINO_N
N3
AU_VIN1_N
N4
AU_VIN1_P
P1
RF_QP
BDLAQP
P2
RF_QN
BDLAQN
R1
BDLAIN RF_IN
R2
BDLAIP RF_IP
T3
RF_TX_RAMP
APC
Figure 4.9.5.2 MT6235 check point
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
TP6
VMIC_BIAS_P
VMIC_BIAS_N
R206 0
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Copyright © 2010 LG Electronics. Inc. All right reserved.
220
220
TP1
FB504 1000
FB505 1000
TP2
HS_L
HS_R
TP5
RCV_SPK_N
RCV_SPK_P
MIC_P
MIC_N
HP_MIC_N
HP_MIC_P
Only for training and service purposes