Samsung SPH-A900 Service Manual page 30

Flow Chart of Troubleshooting
DC_VOLT
ZD201
D200
VICHG
DC_SENS
ON_SW_SENSE
ON_SW
R205
HP_PWR
PS_HOLD
HRESET
SDA_PM
SCL_PM
EAR_REF
EAR_DET
EAR_MIC+
SEND_END
USB_OE_N
USB_SUSPEND
USB_DATA
USB_VPO
USB_VMO
C225 C226
TA204
C206
U200
VPD
35 34 30 9 4
C208
R201
REFBP
36
VL
37
VICHG PGND1
38
_AC_OK
2
_ONO
46
PWR_ON PGND2
26
HP_PWR
41
PWR_HOLD
_RESET
42
_HRESET
25
DATA
40
CLK
11
INV1 RX_EN
12
COMP1
15
INV2
14
COMP2
TCXO_EN
16
_OE
17
SUSPEND
20
RCV
21
VP
22
VM
C215
C227
44 23 24 1918
C228
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C200
C201 C202 C203
TA205
C207
45
L200
31
LX1
32 R202
33
FB1
R203
29
LX2
28 R204 L201
27
FB2
R206
48
10
OUT1
8
OUT2
13
OUT3
43
7
OUT4
1
OUT5
39
47
OUT6
3
OUT7
5
OUT8
6
OUT9
49
GND C216 C217 C218 C219 C220
50
NC
51
NC
D201
7-2
S3.6
V_BAT
ZD200
TDZ5.6 VPD
R200
C209
C210
C211
C212
C221 C222 C223 C224
V_BUS
VPULL
D+_IN
D-_IN
V_MSMCORE
V_MSMC
RESETIN_N
VPD
VPA
V_RFRX
RX_CTRL
VDD_LCD_2.85
V_TCXO
TCXO_CTRL
V_SYNTH
V_RFTX
VDD2.6
MOTOR_EN