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F low Chart of Troubleshooting
ONKEYN
C40 6
C40 7
VBAT
V400
R40 2
0
+VDD_RX_T X
R40 7
+VCC_SYN
+VDD_IMAGE
+AVDD
+AVDD_HF A
+VDD_IO_HIGH
+VDD_IO_LOW
VDD_IO_HIGH
2.9V
MIC_BIAS
VDD_IO_LOW
1.8V
VDD_VI B
2.9V
RSTON
VDD_IMAGE
1.9V
AVDD
2.6V
IT_PM U
AVDD_HFA
2.6V
VCC_RX_TX
2.8V
VCC_SYN
2.8V
SIMI O
VDD_GSM_CORE
1.8V
VDD_CORE_BT
1.8V
VDD_VIB_2. 9
2.9V
VDD_4V
4V
OSC400
CC7V-T1A
R401
C40 9
C410
C411
C413
24
RF2VDD
23
RF12VBAT
22
RF1VDD
21
D1VDD
C414
20
LPD1VBAT
19
LPVDD
18
HCVBAT
17
HCVDD
16
C415
D2VDD
15
IOD2VBAT
14
IOVDD
13
_REC2
C421
C422
22UF
C423
C424
+VDD_IO_LOW
R409
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C404
C405
BU_RST
C425
BAT401
25
26
27
28
29
30
31
32
33
34
35
36
37
SCP
38
SC N
39
D3VDD
40
SIMD3VBAT
41
SIMVCC
42
SIMIOCD
43
SIMCKCD
U403
44
_SIMRSCD
45
SIME N
46
GPO3
GPO2 47
TP401
48
TP402
GPO1
GND 49
50
GND
GND 51
52
GND
NC 53
54
NC
12
11
10
9
8
7
6
5
4
3
2
1
LCD_BL_ON
7- 8
VDD_SLEEP
C412
R403
+VDD_IO_LOW
SIM_VCC
SIM_IO
SIM400
2-292292- 9
SIM_CLK
1
2
SIM_RST
3
G
G
G
10
9
8
C416
C417
C418
C426
C419
+VDD_IO_HIGH
+VDD_IO_HIGH
R406
U404
R404
BACKLIGHT
C420
R408
6
5
4
G
7
AUX_ON
SCL
SDA
32KHz_DIGI T
PON_TX
REF_ON
SIMRST
SIMCLK
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