Only For Training And Service Purposes - LG KG290 Service Manual

4. TROUBLE SHOOTING
(2) Checking Mobile SW & FEM
TEST POINT
CIRCUIT
TP500 TP502 TP501
R590 NA
NA R505
RF-600
SW500
C517
22p
FL500
YGHF-S006T
2V75_VVCXO
C534
C535
39p
0.1u
LGE Internal Use Only
RF 600.ANT
RF 600.RF
Vctrl 1
Vctrl 2
FL500
Vctrl 3
11
GND6 TX2G
10 8
GND5 TX1G
9 6
GND4
7
GND3 PCS_RX+
5 13
GND2 PCS_RX-
4 12
GND1 DCS_RX+
2 15
DCS_RX-
14
VCTRL3 EGSM_RX+
20 17
VCTRL2 EGSM_RX-
21 16
VCTRL1 NC2
22 19
VDD NC1
3 18
C544 C545 C546
39p 39p 39p
RF600
Waveform
Graph 4.3.2(a) GSM Tx mode
ANT_SW1
ANT_SW2
ANT_SW3
Graph 4.3.2(b) DCS,PCS Tx mode
Copyright © 2007 LG Electronics. Inc. All right reserved.
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Vdd (C534)
Vdd (C535)
Vctrl 1
Vctrl 2
Vctrl 3
Vctrl 1
Vctrl 2
Vctrl 3

Only for training and service purposes