LG D722K Service Manual page 75

4. 7. LTE RF Part
4. 7. 3. LTE B7 TX/PRX 4 7 3 LTE B7 TX/PRX
3.7.3.3 Checking RF signal path
4. 7. 3. 3. Checking RF signal path
Test Point
TP5
TP2
TP1
TP1(C1101)
TP1(C1101)
33p
C1101
TP5(L1753)
TP4(C1756)
C1756 1.5n
LGE Internal Use Only
FL1100
FL1100
4 3
Termination_Port OUT
5 2
TP2(C1103)
GND2 GND1
6 1
Coupling IN
1 2
TP5(L1753)
C1750 33p
FL1750
4 7
ANT RX
1
TP6(C1757)
TX
2 6
GND1 GND4
3 8
GND2 GND5
5 9
GND3 GND6
61
2655MHz
4. Trouble Shooting
FL1102 FL1102
FL10062
FL10062
1
GND1
C1103 3.3n
2
COMMOM
3
GND2
TP2(C1103)
L1753 1.2n
WTR0_PRX_HB3_IN
L1754
2n
ACPM-9307-TR1
C1753 33p 1
10
3
C1757 2n
9
7
11
TP6(C1757)
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3. TROUBLE SHOOTING
U1500
U1751
FL1750
TP3(C1104)
C1104 8p
6
HI-BAND
5
GND3
4
LO-BAND
C1105
2.2n
TP7(C1760)
U1751
4
VCC1 VIO
6
VCC2 SCLK
VBAT
2
RFOUT RFIN
5
SDTA
GND
8
PGND NC
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Only for training and service purposes
TP7
TP6
TP4 TP4
TP3
( )
TP3(C1104)
TP7(C1760)
C1760 33p