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SGH-X450 Flow Chart of Troubleshooting
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7-5
POWER
SIM_CLK
SIM_RST
SIM_VCC
SIM_IO
VCC
A
R31
00
+VBAT
T
100N
F
C300
VCC
D
R30
2
0.051
6.3V
10U
F
C318
VDD_VIB
10NF
C314
R306
10K,1%
1.2K,1%
R301
C30
2
100N
F
VCCD
2.2U
F
C311
VR
F
2.2U
F
C316
C305
33PF
ML414R-F9GE
BAT300
+VBATT
C315
2.2U
F
R30
3
330
K
6
_ACOK
8
_CHG
5
_EN
C30
1
2.2U
F
9
GG
10
11
GG
12
3
GND
2
IN
4
ISET
VL
1
U30
1
MAX1508ETA
BATT
7
100NF
C322
2.2U
F
C310
C309
2.2UF
C32
4
C313
100PF
T30
100P
F
R305
47
K
VCC
B
470nF
C30
6
VSI
M
48
R304
390K
VLDO_
1
9
VLDO_
2
11
39
VLDO_
3
VLDO_
4
37
VLDO_
5
33
42
VLDO_
6
40
VLDO_
7
VREF
30
VRT
C
12
34
VDD67
41
1
VEXT
VIB_DRV
4
36
VL4S_A
VL4S_B
35
32
VL5S_A
VL5S_B
31
49
SIM_RST
53
UP_CL
K
UP_IO
52
UP_RST
54
VACC
3
VBAT
2
10
VDD12
VDD34
38
VDD5
5
RING_DR
V
RING_PWM
55
13
RTC_ALMN
SCLK
17
SD
I
15
SD
O
16
SIM_CLK
50
51
SIM_IO
14
INTR
Q
7
LED1_DRV
LED2_DRV
8
PSW1_BUF
20
21
PWR_KEEP
PWR_SW1N
46
47
PWR_SW2
RESETN
19
62
GND
GND 63
64
GND
65
GND
GND
66
GNDD
60
GNDD
1
6
28
GND
Q
26
EN_5A
EN_5B
27
GND
57
67
GND
GND
68
58
GND
GND
59
61
GND
56
ADC_TRI
G
BTEMP
43
29
CREF
18
CS
N
22
EN_3
EN_4[0]
23
24
EN_4[1]
EN_5
25
U30
0
PSC2106A1WUS-D
T
ADC_AUX1
44
45
ADC_AUX2
C304
33PF
R300
10
C312
2.2U
F
2.2UF
T3
3
NC
C321
C307
33PF
T64
C303
2
VCC_1.8A
Q300
DTC144EE/TR
1
3
10
V
10UF
C319
100NF
C320
+VBATT
C323
4.7uF
R30
7
NC
G
7
8
G
G
9
10
G
VRTC
VCCD
CN300
11
2
2
33
4
4
5
5
6
6
3K,1%
R308
PC-D6-A3-H3.0-
S
CHG_DE
T
+VBATT
VRT
C
VREF
SIMRST
SIMCL
K
SIMDAT
A
RTCALARM
EN_VPAC
UP_SDI
UP_SCLK
UP_CS
BACKLIGHT
1
BACKLIGHT
2
TA_VEX
T
CHG_ON
KEY_ROW(0)
KEY_COL(2)
TA_VEXT
PWR_KEEP
RS
T
PWR_ON
JIG_O
N
ICHRG
YMU_VIB_EN
XOENA