LG KG290 - Page 58

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Only for training and service purposes
4. TROUBLE SHOOTING
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(2) Checking Mobile SW & FEM
RF 600.ANT
RF 600.RF
RF600
FL500
Vctrl 1
Vctrl 2
Vctrl 3
Vdd (C534)
Vdd (C535)
EGSM RX
Vctrl 1
Vctrl 2
Vctrl 3
NC2
19
PCS_RX+
13
12
PCS_RX-
TX1G
6
TX2G
8
VCTRL1
22
21
VCTRL2
20
VCTRL3
3
VDD
DCS_RX+
15
14
DCS_RX-
EGSM_RX+
17
16
EGSM_RX-
GND1
2
25
GND10 GND11
26
GND2
4
GND3
5
7
GND4
GND5
9
10
GND6
11
GND7
GND8
23
GND9
24
18
NC1
YGHF-S006T
FL500
1
ANT
0
R506
39p
C545
2V75_VVCXO
C535
0.1u
C544
R505NA
39p
TP502
C546
39p
39p
R590
C534
NA
G1 G2
RF
R591
0
RF-600
SW500
ANT
TP500
22p
C517
TP501
ANT_SW3
ANT_SW2
ANT_SW1
Graph 4.2.2 FEM Control Signal
TEST POINT
CIRCUIT
WAVEFORM