4. TROUBLE SHOOTING
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4. TROUBLE SHOOTING
4.12 LTE Tx Trouble
TP1
TP2
TP3
TP4
TP6
TP1
TP2
TP3
TP5
TP7
TP3
TP7
U101
TP4
TP6
TP1
TP2
TP5
U102
C141
1p
DNI
C125
47p
C100
FL106 HHM1726T4
960M
698M
6
5
2
4
1
3
B2
UB
B1
1
D
N
G
2
D
N
G
C
N
C142
DNI
R112
12n
C101 18p
10n
L104
100p
C105
U100
BGA751L7
7
4
3
5
2
6
1
RFIN
RFOUT
VEN
RREF
VGS
VCC
D
N
G
P
1n
C106
1n
C107
0
R100
10n
C108
100n
C109
5.6k
R103
L106
DNI
47p
C104
FL104
SAFEA842MAL0F00
842MHz
5
2 3
4
1
IN
OUT
G2
G1 G3
R101
5.6n
L101
DNI
C123
1n
2V8_LNA
8.2p
C112
8.2n
L116
C115 6.8p
SKY77704-18
U102
6
5
7
4
8
3
9
2
10
1
11
PGND
VCC1
VCC2
RFIN
RFOUT
VMODE_1
CPL_IN
VMODE_0
GND
VEN
CPL_OUT
680p
C124
10u
C126
49.9
R119
10u
C127
680p
C128
0
R105
1n
C117
1n
C118
1n
C119
SYS_PWR
DNI
R113
47p
C113
698M960M
HHM1726T4
FL103
6
5
2
4
1
3
B2
UB
B1
1
D
N
G
2
D
N
G
C
N
C111
1n
47p
C114
L107
1p
R117
27n
4.7n
L100
L103 47p
C151 15p
U101
SKY77704-18
6
5
7
4
8
3
9
2
10
1
11
PGND
VCC1
VCC2
RFIN
RFOUT
VMODE_1
CPL_IN
VMODE_0
GND
VEN
CPL_OUT
L112
10n
L102
3.3n
47p
C116
DNI
R118
10n
C130
1n
C122
2.2u
C131
SYS_PWR
0
R106
49.9
R120
DNI
R108
DNI
R107
4.7K
R109
1n
C121
1n
C120
10n
C132
2.2u
C133
330p
C129
49.9
R121
47p
C153
FL109
SAFEA806MCL0F00
806MHz
4
5
1
3
2
G1 O1
IN
G2 O2
FL101
B7959
1732.5 MHz,2132.5 MHz
9
5
8
4
7
2
3
6
1
RX1
ANT
TX
GND1
GND4
GND2
RX2
GND3
GND6
R102
27n
SW100
G1
ANT
G2
C110
DNI
C150 47p
C143
DNI
4.7K
R110
R116
18n
L105 4.7n
L114
12n
L113
18n
C144
2.2p
4.7n
L117
47p
C152
C154 47p
L115
8.2n
C102
4.7n
LNA0_MODE1
RRFM1_INP
PA_EN1
PA_EN1
PA_MODE0
PA_MODE1
TRF1_OUTN
TRF1_OUTP
CPL_OUT
RRFM1_INN
TP3
4.12 LTE Tx Trouble
TP7
TP6
TP2
TP5
TP4
TP1