Samsung SGH-S720i Service Manual page 21

Flow Chart of Troubleshooting and Circuit Diagrams
VCCD_1.8V VBAT
C330
330PF
L300
2.2uH
C322
C328
10UF
10uF
10V
K12
VSIM
H11
VRTC
G12
LED2_DRV KEY_BL_MAIN
G13
LED1_DRV KEY_BL
F13
RING_DRV
F15
VIB_DRV
C12
VLDO_7
A14
VLDO_6
VL5S_B C9
VIB_DRV
D10
VL5S_A
B10
VLDO_5
B11
VL4S_B
A12
VL4S_A
B12
VLDO_4
A13
VLDO_3
VLDO_2 J12
G11
VLDO_1
F14
VACC
CSN_PSC K8
UP_CS
L8
SCLK_PSC
UP_SCLK
N7
SDO_PSC
UP_SDO
SDI_PSC M7
UP_SDI
VEXT E14
E13
VBAT
VBAT
E11
CH_BDRV
U303
LTC3548EDD-1A
1 VFB1
2
VOUT
3 VIN
4
SW1
GND
5
GND
11
VCCB_2.9V
VCCD_1.8V_E
VR300
C312 C313 C314
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VCCD_1.8V_E VCORE_1.5V
VFB2 10
9
OUT2
RUN1 8
SW2 7
6
RUN2
VCCA_2.9V VCCD_2.9V
VRF_2.9V VCORE_1.5V
C310 C311
C315 C334
3-4
VCCD_1.6V
C327
330PF
L301
4.7uH
C329
10uF
VRTC_1.5V
R300
1
C309
2
C316