Samsung SGH-U900 Service Manual page 45

PMIC & CHARGER PART
VRF_2.7V
A3
VREG_GP1
A7 A2
MPP1|AMUX_IN1 VREG_GP2
B7 B1
MPP2|AMUX_IN2 VREG_GP3
K3
AMUX_OUT
L9
VREG_MMC
L3 G11
MPP3|VIB_DRV_N VREG_MSMA
L1 K8
MPP4|LCD_DRV_N VREG_MSME
L2 J11
KPD_DRV_N VREG_MSMP
K4
VREG_MSMC
D7 K5
MPP5|RUIM_M_RST VSW_MSMC
H7
MPP6|RUIM_RST
D6 A9
MPP9|RUIM_M_CLK VREG_RFRX1
H6 A10
MPP10|RUIM_CLK VREG_RFRX2
D5 A8
VREG_RFTX
MPP11|RUIM_M_IO
H5 B8
MPP12|RUIM_IO VREG_RFUBM
L10
VREG_RUIM
K2
MPP7|CBLPWR_N
B4 L8
MPP8|REF_OUT VREG_S2
L6
VREG_S3
D4 U400 K7
OPT_1 VSW_S2
H8 K6
OPT_2 VSW_S3
C11 A1
REF_BYP VREG_TCXO
E10 G2
REF_GND VREG_USB
D10 B11
REF_ISET VREG_WLAN
B5 D1
SPKR_IN_M ISNS_M
B6 D2
SPKR_IN_P ISNS_P
A5
SPKR_OUT_M
A6 L11
SPKR_OUT_P XTAL_IN
K11
XTAL_OUT
D8
TCXO_EN_1
E4 F8
TCXO_EN_2 SBCK
E11 G8
TCXO_IN SBDT|SSBI
H10 E8
TCXO_OUT_1 SBST
B10
TCXO_OUT_2
F11 J10
TCXO_OUT_RF VCOIN
E2
BAT_FET_N
G4 C2
USB_DAT CHG_CTL_N
J1 C1
USB_D_M VCHG
J2 K1
USB_D_P HSET_BIAS
H2 L4
USB_ID KPD_PWR_N
F4 C10
USB_OE_N MSM_INT_N
6X6X1.2T
F2 G10
USB_OVP_G PON_RESET_N
H4 F10
USB_SE0 PS_HOLD
H1 K9
USB_VBUS SLEEP_CLK
R410
VRF_2.1V
R400
L400
CIG21W4R7MNE
L401
L402
VBAT VMSMB_2.6V
OSC400
C413
R403
C432
PM_SBDT
R405
PM_SBST
R427
ON_SW
D400
TP401
PM_INT
2
PS_HOLD
RST_N
3
1
RTC_CLK
PHONE_DEBUG_ON
C435
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VSD_2.8V VMSMB_2.6V
VRF_2.85V VMSMA_2.6V VMSM_1.8V
C419
C420 C421
C418 C422
C417
VEXT_5.0V
C433 R407
R408
1
C436
BAT400
2
10-3
Flow Chart of Troubleshooting
VSIM_3.0V VRF_2.1V VTCXO_2.85V
VMSM_1.2V VRF_2.7V VBT_2.6V
C423 C415
C428 C429
C414 C424 C425 C426 C427
C430 C416