LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
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C416
C412
U400
EUSY0343501
0603
1u
C418
C414
1u
FB400
0.1u
C401
C423
DNI
C426
1u
C421
1u
1K
R406
1u
C407
C416
1u
DNI
C424
C403
4.7u
4.7u
C402
1u
C412
4.7u
C406
C425
DNI
12n
6800p
C409
C415
R405
22K
C413
R404
1K
1u
0
R408
12n
C420
6800p
C419
100K
R410
4.7u
C404
FB401
1u
C417
C405
4.7u
1u
C410
C422
DNI
0.1u
C400
C4
OUT4
RIN1
D4
RIN2
D6
D5
RIN3_GPI8
RIN4_RXP
E5
D2
RON
ROP
E1
ROUT
B5
F1
SCLK
SDIN
E3
SPKGND
B1
C1
SPKN
SPKP
A1
B2
SPKVDD
C3
VMID
G2
GPIO3_BCLK2
G3
GPIO4_DACLRC2
G1
GPIO5_DACDAT2
B3
HPGND
HPVDD
A5
LIN1
D3
C5
LIN2
LIN3_GPI7
C6
LIN4_RXN
B6
C2
LON
D1
LOP
LOUT
B4
F5
MCLK
MICBIAS
A2
E2
MODE
OUT3
A4
ADCDAT
F4
ADCLRC_GPIO1
E4
A3
AGND
AVDD
A6
G5
BCLK
CSB_ADDR
F2
DACDAT
F3
DACLRC
G4
DBVDD
G6
DCVDD
F6
E6
DGND
WM8990ECS_RV
U400
1u
C408
R409
0
1u
C411
22K
R407
MIC1P
MIC2P
MAIN_MIC_1P
SPK_L
SPK_R
CODEC_I2C_SCL
VREG_WM_2.7V
VREG_MSME_1.8V
MIC_PWR
MAIN_MIC_1N
MIC1N
FM_AUDIO_L
FM_AUDIO_R
HP_EAR_R
MMP_A_LRCLK
HP_EAR_L
MID_MICP
VREG_5V
MIDI_3.3V
SPK_OUT-
MMP_A_MCLK
CODEC_I2C_SDA
HP_R
HP_L
MMP_A_BCLK
MMP_ADI_ADCDAT
MMP_ADO_DACDAT
Schematic of voice path
U400
C412
C416