Checking Ant. Sw Module Block - LG TU550 Service Manual

4.4 Checking Ant. SW Module Block

000 56p
H
L104
05
NA
23
22
p 21
20
19
18
17
16
15
14
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Only for training and service purposes
ANT_SEL1
ANT_SEL0
ANT_SEL2
Antenna Switch Block(Bottom)
R1002
C1007
33p
1
ANT GND1
2
GND6 RX4
3
TRX1 RX3
4
GND5 RX2
5
TRX2 U100 RX1
6
GND4 CXG1198AEQ GND2
7
NC8 NC1
8
NC7 NC2
9
NC6 NC3
10
NC5 NC4
Schematic of the Antenna Switch Block
4. TROUBLE SHOOTING
R1000 1K
R1001 1K
1K
C1008 C1009 C1010
33p 33p 0.1uF
TP1
C1023
33p
L121
NA
- 75 -
15nH
ANT_SEL2
ANT_SEL1
ANT_SEL0
C1011
33p
L111
6.8nH
5 4
C1026
G2 O2
IN
NA
1
G1 O1
2 3
B7837
FL102
L123
6.8nH
LGE Internal Use Only