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Flow Chart of Troubleshooting
7-7
SIM_IO
+VDD_GSM_CORE
+VCC_SYN
2.8V
1.8V
2.1V
2.8V
SIM_VCC
+AVDD_HFA
typical 3.8V
VDD_CAM
SIM_CLK
+AVDD
2.6V
+VDD_IO_LOW
2.6V
+VDD_IO_HIGH
+VDD_RX_TX
1.875V
2.9V
2.9V
MIC_BIAS
+VDD_1V8
2.8V
1.8V
SIM_RST
C423
C413
C405
TP402
TP401
C425
C429
C424
C422
C426
C414
BAT409
N
E
G
2
P
O
S
1
R401
C418
OSC400
C407
C411
C420
R404
30
V
S
A
V
E
10
_
IR
Q
27
_
O
N
K
E
Y
1
_
R
E
C
1
13
_REC2
11
_
R
S
T
H
C
_SIMRSCD
44
7
_
S
IM
R
S
H
C
40
SIMD3VBAT
45
SIMEN
42
SIMIOCD
9
S
IM
IO
H
C
41
SIMVCC
31
V
B
A
T
32
V
C
H
G
29
V
IN
T
RF1VDD
22
24
RF2VDD
2
S
C
L
38
SCN
37
SCP
3
S
D
A
43
SIMCKCD
8
S
IM
C
K
H
C
53
NC
NC 54
26
O
S
C
I
25
O
S
C
O
6
P
W
R
E
N
1
5
P
W
R
E
N
2
28
R
E
F
C
23
RF12VBAT
GPO3
46
HCVBAT
18
17
HCVDD
15
IOD2VBAT
IOVDD
14
LPD1VBAT
20
19
LPVDD
12
M
IC
B
IA
S
D2VDD
16
39
D3VDD
49
GND
GND 50
51
GND
GND 52
48
GPO1
47
GPO2
34
C
H
G
C
U
R
/B
A
T
M
A
X
33
C
H
G
D
R
V
4
C
L
K
3
2
K
36
C
P
V
B
A
T
35
C
P
V
D
D
21
D1VDD
U400
G
10
C419
2
3
4
5
6
7
G
G
8
9
G
SIM400
1
+VDD_IO_LOW
C415
C408
C417
TA410
C406
VR400
C412
+AVDD
+AVDD_HFA
BT_RST
BU_RST
VBAT
IT_PMU
ONKEYN
AUX_ON
RSTON
SIMRST
+VDD_RX_TX
+VCC_SYN
32KHz_DIGIT
+VDD_1V8
+VDD_IO_HIGH
+VDD_CAM
+VDD_IO_LOW
MIC_BIAS
REF_ON
PON_TX
SCL
SDA
SIMCLK
SIMIO