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Flow Chart of Troubleshooting
7-2
+VDD_IO_HIGH
R315
+VDD_IO_HIGH
C312
R313
U302
3
GND
2
INA
NC
1
OUTY
4
5
VCC
R314
26M_DIGIT
26M_CLK
SIM_RST
SIM_CLK
SIM_IO
SIM_VCC
Typical 3.7V
C419
C422
V401
C425
+VDD_SLEEP
C417
C416
C406
C412
C413
OSC400
R405
C410
R406
C405
C418
V400
C424
C420
C421
C407
C408
C411
+VDD_IO_LOW
TP400
C414
BAT400
NEG
POS
C423
_
S
IM
R
S
H
C
7
C415
V
IN
T
29
V
S
A
V
E
30
_
IR
Q
10
_
O
N
K
E
Y
27
_
R
E
C
1
1
_REC2
13
_
R
S
T
H
C
11
44
_SIMRSCD
S
IM
C
K
H
C
8
SIMD3VBAT 40
SIMEN
45
SIMIOCD
42
S
IM
IO
H
C
9
SIMVCC
41
V
B
A
T
31
V
C
H
G
32
RF12VBAT
23
22
RF1VDD
RF2VDD
24
S
C
L
2
SCN
38
SCP
37
S
D
A
3
SIMCKCD
43
M
IC
B
IA
S
12
NC 53
54
NC
O
S
C
I
26
O
S
C
O
25
P
W
R
E
N
1
6
P
W
R
E
N
2
5
R
E
F
C
28
GPO2
47
46
GPO3
18
HCVBAT
HCVDD
17
IOD2VBAT
15
14
IOVDD
20
LPD1VBAT
LPVDD
19
D1VDD
21
16
D2VDD
D3VDD 39
GND 49
50
GND
GND 51
52
GND
GPO1
48
U400
C
H
G
C
U
R
/B
A
T
M
A
X
34
C
H
G
D
R
V
33
C
L
K
32
K
4
C
P
V
B
A
T
36
C
P
V
D
D
35
R401
R402
G
9
10
G
1
2
3
4
5
6
G
7
8
G
SIM400
R404
C409
PON_TX
BU_RST
REF_ON
MIC_BIAS
+VDD_IO_LOW
+AVDD_HFA
VBAT
32KHz_DIGIT
+VDD_IMAGE
SIMRST
RSTON
AUX_ON
ONKEYN
IT_PMU
SIMIO
SIMCLK
SDA
SCL
+VDD_RX_TX
+VCC_SYN
+AVDD
+VDD_IO_HIGH