LG U990 Service Manual page 129

4. TROUBLE SHOOTING
AC18
LINE_ON
AC17
LINE_OP
AA17
HPH_R
W17
HPH_L
AE18
EAR1ON
AF18
EAR1OP
T15
MICBIAS
C530
12n
C532 1u R510
SPK_R
1K
C535
FM_AUDIO_R
C536
FM_AUDIO_L
C541 1u
R516
SPK_L
1K
C547
12n
CAM_VDD_AF_2.7V
CAM_VDD_SD_1.8V
LGE Internal Use Only
HP_R
HP_L
SPK_R
SPK_L
RCV-
RCV+
MICBIAS
MMP_A_LRCLK
MMP_A_BCLK
MMP_ADI_ADCDAT
MMP_ADO_DACDAT
MMP_A_MCLK
C533
R511
4.7n 18K
1u
1u
C542 MID_MICP
R517
4.7n 18K
CODEC I2C SCL
EAR_MIC_P
BT_SBST
BT_TX_RX_N
TCXO_BT
BT_CLK
BT_SBCK
BT_SBDT
BT_DATA
V_BACK_UP
HOOK_SENSE_N
SPK_OUT-
SPK_OUT+
AGND2
7
LRC
8
BCLK
9
ADCDAT
10
DACDAT VMID
11
MCLK
MICBIAS
4
RIP
5
RIN ROUT1
LOUT1
6
R2_GPIO3
3
L2_GPIO2 ROUT2
1
LIP LOUT2
2
LIN
19
AUXL OUT3
OUT4
20
AUXR
MODE
15
CSB_GPIO1
16
SCLK
CN603
G1
1 40
2 39
3 38
4 37
5 36
6 35
7 34
8 33
9 32
10 31
11 30
12 29
13 28
14 27
15 26
16 25
17 24
18 23
19 22
20 21
G2
AXK740327G
Copyright © 2007 LG Electronics. Inc. All right reserved.
- 130 -
24
C525
C524
10u
0.1u
C531
27
NA
32
29
HP_EAR_R
30
HP_EAR_L
FB500
23
SPK_OUT+
25
SPK_OUT-
FB501
C543 C544
22
MIC2P NA NA
21
18
MICROSD_CLK
MICROSD_DETECT
MICROSD_CMD
MICROSD_DATA[0]
MICROSD_DATA[1]
MICROSD_DATA[2]
MICROSD_DATA[3]
CAM_MIC+
WHEEL_SW_R
WHEEL_SW_L
MMP_CAM_PWR_EN
Only for training and service purposes
MIC_PWR