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Flow Chart of Troubleshooting
9-46
PM_INT
VREG_MSMC_1.2V
C418
7
14
R
VREG_RFRX2_2.7V
VDC
VREG_RFRX1_2.1V
VREG_ADC_2.6V
R407
C413
C425
R419
C407
R420
D401
3
1
2
C409
R403
CAM_2.8V
OSC401
C411
C426
C415
VREG_USB_3.3V
C424
C408
L403
C423
C417
R409
TP_AMUX_OUT
C430
VDC
VBATT
C412
TP_RF_TCXO
VREG_MMC_2.8V
L402
R408
R404
R410
3
S
6 S
5 S
U407
7
D
4 G
S 1
2
S
VREG_TCXO_2.8V
C414
C429
VREG_USIM_3.0V
EXT_5V
C410
BAT401
G
E
N
2
S
O
P
1
L401
C421
CAM_1.8V
C449
VREG_BT_2.6V
R405
C416
C432
OPT_1
C419
EXT_5V
VREG_MSME_1.8V
VREG_MSMA_2.6V
VREG_MSMP_2.6V
VREG_S2
L8
VREG_MMC
L9
C428
VREG_RUIM
L10
XTAL_IN
L11
L2
KPD_DRV_N
MPP3|VIB_DRV_N
L3
KPD_PWR_N
L4
C
M
S
M
_
D
D
V
5
L
VREG_S3
L6
3
2
S
_
D
D
V
7
L
AMUX_OUT
K3
VREG_MSMC
K4
VSW_MSMC
K5
K6
VSW_S3
VSW_S2
K7
VREG_MSME
K8
SLEEP_CLK
K9
MPP4|LCD_DRV_N
L1
USB_D_M
J1
VCOIN
J10
VREG_MSMP
J11
USB_D_P
J2
K1
HSET_BIAS
MI
U
R
_
D
D
V
0
1
K
XTAL_OUT
K11
MPP7|CBLPWR_N
K2
TCXO_OUT_1
H10
M
S
M
_
D
D
V
1
1
H
USB_ID
H2
USB_SE0
H4
MPP12|RUIM_IO
H5
MPP10|RUIM_CLK
H6
MPP6|RUIM_RST
H7
OPT_2
H8
VREG_MSMA
G11
VREG_USB
G2
USB_DAT
G4
D
N
G
5
G
D
N
G
6
G
7
G
D
N
G
SBDT|SSBI
G8
USB_VBUS
H1
USB_OVP_G
F2
USB_OE_N
F4
D
N
G
5
F
D
N
G
6
F
D
N
G
7
F
SBCK
F8
V
5
_
G
E
R
V
1
G
PON_RESET_N
G10
TCXO_EN_2
E4
D
N
G
5
E
D
N
G
6
E
D
N
G
7
E
SBST
E8
V
5
_
W
S
V
1
F
PS_HOLD
F10
TCXO_OUT_RF
F11
MPP11|RUIM_M_IO
D5
MPP9|RUIM_M_CLK
D6
MPP5|RUIM_M_RST
D7
TCXO_EN_1
D8
T
A
B
V
1
E
REF_GND
E10
TCXO_IN
E11
BAT_FET_N
E2
MSM_INT_N
C10
REF_BYP
C11
CHG_CTL_N
C2
ISNS_M
D1
REF_ISET
D10
C
N
D
11
D
ISNS_P
D2
OPT_1
D4
P
G
_
D
D
V
3
B
MPP8|REF_OUT
B4
SPKR_IN_M
B5
SPKR_IN_P
B6
MPP2|AMUX_IN2
B7
VREG_RFUBM
B8
F
R_
D
D
V
9
B
VCHG
C1
SPKR_OUT_P
A6
MPP1|AMUX_IN1
A7
VREG_RFTX
A8
VREG_RFRX1
A9
VREG_GP3
B1
TCXO_OUT_2
B10
VREG_WLAN
B11
NI
A
M
_
D
D
V
2
B
C
N
2
VREG_TCXO
A1
VREG_RFRX2
A10
N
A
L
W_
D
D
V
1
1
A
A2
VREG_GP2
VREG_GP1
A3
R
K
P
S
_
D
D
V
4
A
SPKR_OUT_M
A5
CAM_AVDD_2.8V
U401
C
N
1
C420
C422
USB_5V
D402
VDD_TOUCH_2.8V
BAT_FET_N
BAT_FET_N
PMIC_SBST
MSM_SIM_CLK
MSM_SIM_IO
REF_OUT
PON_RESET_N
PS_HOLD
BOOT_SW
VF
PHONE_ON
SLEEP_CLK
PMIC_SBDT
PM_INT_N
TCXO_OUT
TCXO
TCXO_EN
JIG_ON_SW
USB_D+
USB_D-
SIM_RST
SIM_CLK
SIM_IO
USB_SEO_MSM
USB_DAT_MSM
USB_OE_MSM
MSM_SIM_RST
AMUX_OUT
R208
71
2
R
ANT201
VREG_BT_2.6V
ANT200
C217
12
2
C
R215
L211
R218
VREG_BT_2.6V
C220
22
V
3
R
D
D
V
V5
R
D
D
V
32
VIO
29
20
VREG_CTL
8
WLAN_RF_ACTIVE
10 WLAN_STATUS
WLAN_TX_CONFX
9
16
RESET
2
UART_CTS
UART_RTS
3
30
UART_RX
UART_TX
1
6
UART_WAKEUP
4
VAFL|VAFR
VAFR|VAFL
5
5
3
I2C_CK
17
18
I2C_DA
INTX 21
LPO_IN
19
26
PCM_CLK
PCM_IN
25
24
PCM_OUT
PCM_SYNC
27
9
3
D
N
G
3
1
5
1
D
N
G
8
2
D
N
G
D
N
G
13 23
D
N
G
D
N
G
33 43
D
N
G
D
N
G
21
T
N
A_
T
B
7
BT_WAKEUP
41
T
N
A_
M
F
D
N
G
1
1
6
3
D
N
G
D
N
G
7
3
8
3
D
N
G
D
N
G
MOD201
T
N
A_
M
F
BT_RESET
SLEEP_CLK
BT_WAKE
PCM_CLK
PCM_DOUT
PCM_DIN
PCM_SYNC
UART1_RFR
UART1_CTS
UART1_TX
UART1_RX
HOST_WAKE
RADIO_ROUT
RADIO_LOUT
BT_PWR_ON
Summary of Contents for SGH-G400
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