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Flow Chart of Troubleshooting
10-33
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L103
L110
C129
L111
VRF_2.9V
850LNA_N
0
4
B
H
X
T
1
4
D
N
G
5
850LNA_P
6900LNA_N
7
900LNA_P
81800LNA_N
9
1800LNA_P
3
C
C
V
3
3
N
O
M
O
L
4
3
A
N
E
G
I
D
V
P
I
_
X
T
|
P
I5
3
6
3
M
I
_
X
T
|
M
I
7
3
M
Q
_
X
T
|
M
Q
8
3
P
Q
_
X
T
|
P
Q
9
3
B
L
X
T
4
CLK
26
SXENA
27
CHIPENA
28
NC
29
NC
3
VPC
30
NC
31
NC
2
3
J
D
A
F
P
L
9
1F
U
B
X
|
Z
H
M
6
2
_
Z
H
M
3
1
2
TXENA
0
2
E
N
U
T
X
21
XTAL
22
VCC2
23
DATAIN
24
LATCHENABLE
25
1900LNA_N
11
1900LNA_P
2
1
A
N
E
X
R
3
1
4
C
C
V
4
1
N
I
F
R
X
T
5
1C
P
A
V
6
1
P
P
M
O
C
7
1N
P
M
O
C
8
1
UCD100
1
VCC1
10
R135
ANT101
R102
ANT100
C134
NC
4
1
VDD
3
VOUT
R122
Q100
6CE
2
GND
5
GND
C104
R127
C102
VRF_2.9V
C136
C133
R115
L109
U406
C142
C128
C124
L102
VBAT
R109
C108
5
GND
PIO_5_UART_RTS2
6
7PIO_4_UART_TX2
8
RESETB
9
PCM_OUT
21
VDD_1.8V
ANT
22
23
GND
24
GND
25
PIO_1
26
UART_CTS
3
PIO_2
4
PIO_3
14
UART_RTS
PIO_7_UART_RX2
15
16
PCM_CLK
17
UART_RX
18
VDD_REG
19
GND
2
UART_TX
20
PCM_SYNC
MOD100
1
PIO_0
10PIO_6_UART_CTS2
11
VDD_UART
12
GND
13
PCM_IN
C140
C111
R124
C107
C119
2
C
3
G
1
G
4
R130
TCX101
2
GND
3
OUT
VCC
4
1
VCON
RFS101
A
ANT102
13
2
R136
Y
R126
A
2
3GND
1NC
NC5
VCC6
4
C103
U101
R111
VRF_2.9V
C113
R101
C118
R104
C132
C112
R125
R123
C126
C120
R112
R118
L115
VBT_1.8V
VBAT
C101
R116
L114
R107
VBT_1.8V
R108
L108
C121
L104
C100
L116
*
C122
VBAT
C135
2
1
1
L
R100
R117
VC2
11
15VC3
L101
1
GSM1900-RX
2
GSM1900-RX
GSM850-RX7
8
GSM850-RX
12GSM850/900-TX
5
GSM900-RX
GSM900-RX6
13VC1
17
ANT
G
1416
G
G
918
G
3
GSM1800-RX
GSM1800-RX4
GSM1800/1900-TX
10
F100
L107
C138
7GSMIN
GSM_OUT12
RSVD
8
VBATT
5
VPC
6
4VSUP
14
DCS|PCS_OUT
ENA
1
15
GND
GND9
GND13
GND11
10
GND
GND
17
PAM101
BS
3
COUP_OUT16
DCS|PCS_IN
2
R114
R120
C116
C115
R128
C130
L106
L105
C141
C110
C109
C137
C106
C139
SERDAT
VAPC
XOENA
BAND_SEL
DCS_TX_EN
GSM_TX_EN
ANT
DPCS_OUT
PCM_TXD
PCM_FCLK
PCM_FSYNC
AFC
CLK13M_MC
RX_EN
RTX_IP
RTX_IN
RTX_QN
RTX_QP
PAC_EN
TX_EN
SX_EN
SERCLK
SERLE
DPCS_OUT
GSM_OUT
BT_EN
GSM74137_OUT
VPC
VPC
MOD_SEL
SAT_DET
GSM_OUT
PCS_RX_EN
DCS74137_OUT
TX_FB
13M_BUF
13M_BUF
SAT_DET
CLK26M_RF
CLK13M_TR
CLK13M_WM
TX_FB
CLK26M_RF
DCS74137_OUT
GSM74137_OUT
DEBUG_TXD
DEBUG_RXD
PCM_RXD