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Flow Chart of Troubleshooting
VDD_RX_TX_2.8V
4
3
VCC
OUT
TCX101
VC
GND
2
1
C142
NRESET
GSM_REF_OUT
GSM_REF_ON
BT_DD
R205
BT_DU
BT_INT
BT_DCL
BT_FSC
RXD2
TP203
CTS2
TXD2
TP204
RTS2
OUT
32KHZ_DIGIT
R111
C143
C145
VDD_BT_1.5V
VDD_IO_LOW_1.8V
R203
C221
C223
R204
SPI_CLK
B4
AIO0
SPI_CS#
SPI_MISO
C4
PIO0
SPI_MOSI
B5
PIO1
C5
PIO2
VREGIN_H
C6
PIO3
VREGIN_L
TP201
E7
PIO4
VREGOUT_H
B7
U204
PIO5
VREGENABLE
D5
PIO7
C7
PIO9
RF_N
RF_P
G4
PCM_IN
H2
PCM_OUT
XTAL_IN
TP202
H3
PCM_CLK
XTAL_OUT
H4
PCM_SYNC
RST#
G7
SDIO_DATA0|CSPI_MISO|UART_TX
LO_REF
F6
SDIO_DATA1|CSPI_INT|UART_RTS
TEST_EN
F7
SDIO_DATA2|UART_RX
G6
SDIO_DATA3|CSPI_CS#|UART_CTS
N|CS
H7
SDIO_CLKCSPI_CLK
N|CS
D6
SDIO_CMDCSPI_MOSI
N|CS
E5
SDIO_SD_CS#
N|CS
R206
NC
E6
CLK_32K
NC
BOTH102
C223
R203
R205
TP204
TP205
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U106
1
8
VCC
GND
2
7
MCLK
NC
3
6
EN1
CLK1
4
5
EN2
CLK2
VDDCO
R112
R114
U107
1 NC
VCC 6
2
NC 5
A
3
4
C144
GND
Y
R115
C146
BT_CLK
VDD_IO_LOW_1.8V
C220
C219
C222
H1
E4
F4
G2
A5
B2
A4
5
A6
BAL
7 BAL
E2
F2
3
A3
BT_CLK
A2
G3
B3
G5
VDD_IO_LOW_1.8V
C2
D2
D4
F5
C231
1
R207
2
BT_RST
U102
U104
U105
RFS101
R114
R112
L109
L110
C133
9-41
C133
CLK26M_GSM_RF
C134
G2_26MHZ
REF26M_RF
ANT201
1
2 3
4
F201
L214
1
UNBAL
L208
2
DC
G
G
G
L213
8
6
4
VDD_BT_1.5V
L210
C232
TA101
C145
R113
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