LG GB210 - Page 42

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Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
4. TROUBLE SHOOTING
(2) Checking Mobile SW & Rx SAW filter
TEST POINT
CIRCUIT
SW500
TP3
TP4TP5TP6
IN CASE OF GSM850 /PCS1900
CHANGE THIS MODULE
TO PART_NO SKY77517
7
GSM_RX
TX_EN
4
VLOGIC
2 3
VRAMP
11
ANT
5
BS
6
DCS_RX
GND1
8
9
GND2
10
GND3
GND4
12 13
GND5
14
GND6
15
GND7
SKY7751
8
U500
KMS-507
SW500
ANT
G1 G2
RF
L502
NA
L503
4.7nH
NA
L504
R500
68
C502
56p68p
C501
56p
C500
56p
C503
ANT_SW
PA_ BA ND
PA_ EN
TX_RAMP
TP4
TP5
TP6
TP3
CIRCUIT