LGE Internal Use Only
Signal exist?
Signal exist?
yes
yes
Check TP2, TP3
Check TP2, TP3
Signal exist?
Signal exist?
no
no
Change the board
Change the board
Chart 5 WCDMA Receiver Block sequence
TP 1
TP 3
FIG 26 WCDMA Rx Block
SW200
TP2
TP2
R129
L202
4.7K
100n
FIG 27 Schematic of the FEM
yes
yes
Check FEM Block
Check FEM Block
12
VC4
13
5
VDD
GSM850RX1
14
4
GND1
GND2
15
3
ANT
GSM1800/1900RX2
16
2
GND3
GSM1800/1900RX1
17
1
UMTS1
UMTS3
TP1
- 80 -
Copyright © 2011 LG Electronics. Inc. All right reserved.
4. TROUBLE SHOOTING
TRX_W2100
TRX_AWS
TRX_W900
Only for training and service purposes