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Flow Chart of Troubleshooting
10-28
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L206
L203
C209
C211
L220
L208
L209
V
C
C
2L
VCC2
12
11
VCC2
10
VCC2
V
C
C
B
IA
S
16
V
D
E
T
5
3
VMODE
VREG
4
N
C
8
N
C
19
N
C
18
N
C
20
NC
RFIN
1
RFOUT 9
15
V
C
C
1
13
PAM200
2
NC
G
N
D
17
14
IM
6
N
C
7
C207
C216
C208
C214
L200
L210
C201
C213
C215
G
G
8 9
G
RX 5
TX
7
DUF200
ANT
2
G
1 3
G
G
4 6
L205
C200
L201
C205
F200
2
G G
3 5
G
IN
1
OUT
4
L204
VBAT
C204
C206
C210
LNA_IN
3G_TX
VREF_3G_B1
RF_DAC2
3G
<VCTCXO>
26MHZ
VCC_RX_TX_2.8V
6
3
0
3
X
E
N
X
M
O
D
E
29
8
XOUT
35
X
T
A
L
1
34
X
T
A
L
2
_PDN
19
_RES
9
1
_SEN
RFIPP
R
F
O
H
17
15
R
F
O
L
SCLK
3
SDIO 2
33
V
D
D
1
32
V
D
D
2
11
V
D
D
3
12
V
D
D
4
V
D
D
5
16
V
IO
10
X
D
IV
38
N
C
2
13
R
A
M
P
IN
14
R
A
M
P
O
U
T
RFIAN
27
RFIAP
26
23
RFIDN
22
RFIDP
25
RFIEN
24
RFIEP
RFIPN
21
20
A
F
C
31
6
BIN
7
BIP
BQN
4
5
BQP
G
N
D
28
37
G
N
D
1
18
N
C
N
C
1
39
AERO4221HN/1
U100
C100
VCC_RX_TX_2.8V
C111
C107
R102
VCC_RX_TX_2.8V
R103
C113
0
C126
VDD_IO_LOW_1.8V
C101
C103
3
OUT
VCC
4
1 VCONT
OSC401
2
GND
5
N
C
7
N
C
N
C
8
N
C
6
C115
R105
C117
C106
VCC_SYN_2.8V
C110
D_REF_CLK
AFC
BT_CLK_REQ
D_REF_CLK
RAMP
GSM_RXM_850
GSM_RXP_850
DCS_PCS_TX
GSM_850_900_TX
RF_CLK
RF_EN
BT_CLK_26M
RF_DATA
PON_4220
BB2G_REF_CLK
IRX_TX_P
QRX_TX_N
QRX_TX_P
DCS_RXM
DCS_RXP
GSM_RXM_900
GSM_RXP_900
PCS_RXM
PCS_RXP
RAMP_PAM
IRX_TX_N