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Flow Chart of Troubleshooting
9-2
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NC
R505
VBATT_4.2_3.3V
VDD_USB_3.3V
USB_LDO_5V
C529
VDD_IO_HIGH_2.9V
C516
BAT500
C509
R502
C510
VDD_LCR_LOW_1.8V
R504
OSC500
VDD_RX_2.8V
C519
C508
C505
C528
VDD_MEM_CORE_1.8V
TP502
VBATT_4.2_3.3V
L502
C514
C526
C511
VDD_IO_LOW_1.8V
V
B
A
T
T
_
4
.2
_
3
.3
V
C
5
0
3
VDD_LCR_HIGH_3.3V
C506
C500
AVDD_HFA_2.6V
C521
SHORT
0603
VDD_BT_1.8V
VDD_IO_LOW_1.8V
R503
R508
TP500
VINT
C512
C507
C527
R507
VINT
VDD_IO_HIGH_2.9V
C525
AVDD_2.6V
VDD_TX_2.6V
C530
C513
C
5
0
2
C517
VDD_TX_2.6V
TP503
VHIGH
VBATT_4.2_3.3V
VDD_GSM_CORE_1.2V
VDD_IO_3.3V
VHIGH
VINT
TP501
VDD_SLEEP_2.9V
R528
C504
VDD_PLL_1.2V
D5
REC1_N
D6
GPIO56GND
D7
NC
D8
GPO1
B6
PWREN5
B7
PWREN3
B8
PWREN2
B9
PWREN1
D1
SCUSB
D2
NC
D3
NC
D4
GPO1VIN
B39
VINT
B4
RSTMEM_N
B40
NC
B41
OSCO
B42
NC
B43
VINT
B44
CCSET
B5
INT_N
B
3
1
U
S
IM
V
IN
B
3
2
R
F
3
R
F
4
V
IN
B
3
3
R
F
1
R
F
2
V
IN
B34
GPO2VIN
B35
NC
B36
NC
B
3
7
M
IC
B
IA
S
V
D
D
B38
REFC
B
2
4
N
C
B25
NC
B
2
6
IO
V
IN
B
2
7
D
3
D
4
V
IN
B
2
8
U
S
B
V
IN
B
2
9
D
1
D
2
V
IN
B
3
D
C
D
2
F
B
B
3
0
V
C
C
B
1
7
N
C
B
1
8
N
C
B
1
9
H
C
V
D
D
B
2
L
C
V
IN
B
2
0
N
C
B
2
1
D
6
V
D
D
SCL
B22
B
2
3
N
C
B1
VBATSENSE
B10
GPIO1
B11
GPIO3
B12
GPIO6
B13
CLK32K
B14
USIMACT
B15
USIMPRES
B16
SHUTDOWN
A53
VBUS
VCHG
A54
A55
VCHG
A56
REC2_N
A
6
D
C
D
2
L
X
A
7
D
C
D
1
V
IN
A8
PWREN4
A
9
D
C
D
1
L
X
A
4
6
N
C
A47
VSAVE
A48
REFGND
A49
VHIGH
A
5
D
C
D
2
V
IN
A
5
0
N
C
A
5
1
N
C
A52
OSCI
A
3
9
R
F
4
V
D
D
A
4
N
C
A
4
0
R
F
3
V
D
D
A
4
1
R
F
2
V
D
D
A
4
2
R
F
1
V
D
D
A43
GPO2
A44
NC
A
4
5
N
C
A31
NC
A32
NC
IO
V
D
D
A
3
3
A
3
4
D
4
V
D
D
A
3
5
D
3
V
D
D
U
S
B
V
D
D
A
3
6
A
3
7
D
2
V
D
D
A
3
8
D
1
V
D
D
A24
NC
A25
NC
A
2
6
D
5
D
6
V
IN
A
2
7
D
5
V
D
D
A28
SDA
A29
NC
L
C
V
D
D
A
3
A30
VINT
A17
NC
A18
NC
A
1
9
G
N
D
A2
VBAT
A20
ONKEY_N
A21
NC
A
2
2
G
N
D
A
2
3
H
C
V
IN
A1
VBAT
A
1
0
D
C
D
1
F
B
GPIO2
A11
A12
GPIO4
A
1
3
N
C
A14
GPIO5
A
1
5
N
C
A16
RSTHC_N
U502
1
G
N
D
2
NC
3
NC
VDD_SYN_2.8V
L501
R506
TA500
VDD_RX_TX_2.8V
C522
C524
C515
SIMVCC_M_3.0V
L
5
0
0
C518
D4VDD_1.2V
C520
USB_VBUS_5V
AUX_ON
PMU_INT_M
GSM_REF_ON_PMU
DVM1
DVM2
SDA1
SCL1
RSTON
USB_SUSPEND
SIM_OFF
KEY_POWER_ON
G2_REF_ON
32KHZ_DIGIT
CCSET