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Flow Chart of Troubleshooting
10-21
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VBAT
C122
C123
C115
C109
C105
C106
L108
L107
L101
C114
C117
C118
L104
C103
C100
2
GND1
GND2
4
HOT
1
3
HOT
VRF_2.9V
C126
31
2
1
VDD
51
VLDO1
6
1
VLDO2
9 VLDO3
OSC100
11
TXOP_LO
01
81
C
F
A
V
VBAT
4
1
I
B
B_
C
C
V
4
Q
B
B_
C
C
V
42
E
F
_
C
C
V
1
F
E
R_
C
C
V
71
VCC_TXVCO
5
2
2
3
RX850
13
RX850B
03
RX900
92
RX900B
6
K
L
C
S
A
T
A
D
S
5
N
E
S
7
TXOP_HI
Q
32
B
Q
22
NI
F
E
R
02
B
NI
F
E
R
91
12
P
O_
F
E
R
82
RX1800
RX1800B
62
72
RX1900
RX1900B
GND
33
2
I
3
BI
8
C
N
4
3
C
N
C
N
5
3
U103
C101
C124
L103
TA100
C104
R103
C111
C110
C107
C113
VCCD_2.9V
C112
C108
VBAT
R111
C120
R101
C135
D
N
G
8
D
N
G
9
C125
VLOGIC
2
02
D
N
G
D
N
G
12
VRAMP
3
TX_EN
4
5
BS
DCS_RX
6
GSM_RX
7
4
D
N
G
21 31
3
D
N
G
41
2
D
N
G
51
1
D
N
G
61
D
N
G
GSM_IN
17
18
NC
DCS_IN
19
PAM100
1
VBATT
D
N
G
01
T
N
A
1
1
L102
R100
C121
C119
4
G
C116
RFS100
A
2
3
C
1
G
R102
C127
4
IN2
8 OUT1
OUT2
6
L100
BAL1
9
BAL2
7
2
G
G
3
G
5
10
G
IN1 1
TP101
F100
VMOD_EN
BAND_SEL
TX_EN
VAPC
DPCS_PAM_IN
GSM_LNA_IN_P
GSM_LNA_IN_N
DCS_LNA_IN_N
DCS_LNA_IN_P
GSM_PAM_IN
DPCS_PAM_IN
GSM_PAM_IN
RTXQP
RTXQN
26M_OUT
DCS_LNA_IN_N
DCS_LNA_IN_P
GSM_LNA_IN_N
GSM_LNA_IN_P
SERCLK
SERDAT
SERLE
AFC
RTXIP
RTXIN