LG U990 Service Manual page 126

C532 1u R510
SPK_R
1K
C535
FM_AUDIO_R
C536
FM_AUDIO_L
C541 1u
R516
SPK_L
1K
C548 1u
HP_L
C549 1u
HP_R
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
U502
C548
MIDI_3.3V
C518 C519
4.7u 0.1u
MMP_A_LRCLK
MMP_A_BCLK
C530 MMP_ADI_ADCDAT
12n MMP_ADO_DACDAT
MMP_A_MCLK
C533
R511
4.7n 18K
1u
1u
C542 MID_MICP
R517
4.7n 18K
C547
12n
CODEC_I2C_SCL
CODEC_I2C_SDA
C550 C551
NA NA
Schematic of voice path
4. TROUBLE SHOOTING
C549
VREG_5V
R533
C514 C513 VREG_WM_2.7V
10u
0.1u 0
C516 C517
4.7u 0.1u
VREG_MSME_1.8V
C520 C521
4.7u 0.1u
U502 WM8983
13 12
DCVDD DGND
14
DBVDD
26 28
AVDD2 AGND1
31
AVDD1
24
AGND2
U502
7
LRC
8
BCLK
9
ADCDAT
10 27
DACDAT VMID
11
MCLK
32
MICBIAS
4
RIP
5 29
RIN ROUT1
30
LOUT1
6
R2_GPIO3
3 23
L2_GPIO2 ROUT2
1 25
LIP LOUT2
2
LIN
19 22
AUXL OUT3
21
OUT4
20
AUXR
18
MODE
15
CSB_GPIO1
16
SCLK
17 33
SDIN PGND
- 127 -
C525
C524
10u
0.1u
C531
NA
MIC_PWR
HP_EAR_R
HP_EAR_L
FB500
SPK_OUT+
SPK_OUT-
FB501
C543 C544
NA NA
MIC2P
LGE Internal Use Only