Only For Training And Service Purposes - LG CU720 Service Manual

4. TROUBLE SHOOTING
4.7.3 Checking Rx Level
TP7
TP6
TP3
SW101
TP1
KMS-518
rev.B
WCDMA_850
TP3
L121 47p
RX_WCDMA_850
C158
4.7nH
WCDMA_1900
TP5
C168 6.8nH
C167 56p
RX_WCDMA_1900
REV.D
C171
NA
LGE Internal Use Only
TP8
TP4
TP2
[Fig 4.7.3.1] Test point of the WCDMA RX Block
C101 56p
L103
100nH
TP2
VREG_W
C178
82p
FL103
ANT
B7638
RX TX
C159 2.7nH
C152 56p
TP4
ANT
C169 33p
RX TX
FL104
ACMD-7402-TR1G
[Fig 4.7.3.2] Schematic of the WCDMA RX Block
- 90 -
TP5
TP6
(Vvias)
TP7
C179
R123 L130
0.1u
1.5K 15nH
C182
L132 100p
15nH
C187
NA
TP8
R127
L136
NA
1.5nH
C196
L138 82p
3.3nH
C202
NA
Copyright © 2007 LG Electronics. Inc. All right reserved.

Only for training and service purposes

TP1
L129
3.9nH
C180
L131
4.7p
22nH
FL106
2 3
G1 O1
1
IN
B7838
G2 O2
5 4
C185
L133
4.7p
22nH
L134
3.9nH
C194 47p
REV.D
C195
1.8p L137
3.9nH
REV.D
2 3
FL107
G1 O1
1
IN
G2 O2
B7847
5 4
L139
C201
3.9nH
1.8p REV.D
C203 47p
REV.D