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Flow Chart of Troubleshooting
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7-9
SIM_VCC
SIM_IO
SIM_RST
1.8V
2.9V
SIM_CLK
1.8V
R405
C417
C418
+VDD_IO_LOW
C421
C406
6
G
7
8
G
G
9
10
G
SIM400
1
2
3
4
5
_REC1
1
_REC2
13
_RSTHC
11
44
_SIMRSCD
_SIMRSHC
7
42
SIMIOHC
9
SIMVCC
41
VBAT
31
VCHG
32
VINT
29
VSAVE
30
_IRQ
10
_ONKEY
27
SCN
38
SCP
37
SDA
3
SIMCKCD
43
SIMCKHC
8
SIMD3VBAT 40
SIMEN
45
SIMIOCD
26
OSCO
25
PWREN1
6
PWREN2
5
REFC
28
RF12VBAT
23
22
RF1VDD
RF2VDD
24
SCL
2
IOD2VBAT
15
14
IOVDD
20
LPD1VBAT
LPVDD
19
MICBIAS
12
NC 53
54
NC
OSCI
50
GND
GND 51
52
GND
GPO1
48
GPO2
47
46
GPO3
18
HCVBAT
HCVDD
17
34
CHGDRV
33
CLK32K
4
CPVBAT
36
CPVDD
35
D1VDD
21
16
D2VDD
D3VDD 39
GND 49
U400
CHGCUR/BATMAX
V401
C413
+VDD_SLEEP
C419
C408
NEG
POS
C426
C420
TP400
C423
C409
PON_TX
BU_RST
SCL
REF_ON
32KHz_DIGIT
SIMRST
AUX_ON
SIMCLK
SDA