Only For Training And Service Purposes - LG GW620 Servise Manual

4. TROUBLE SHOOTING
ANTENNA_PAD
DCS_PCS_TX
R53
180ohms
GSM_TX
R64
100ohms
LGE Internal Use Only
ANT_SEL2
ANT_SEL3
C315 1n
C317 1n
R135
30ohms
5dB
R54
180ohms
R138
62ohms
9dB
R63
100ohms
Schematic of the Antenna Switch Block
.
SKY77521
7
BS1
6
BS2
1
HB_RF_IN
3
LB_RF_IN
2
GND1
11
GND2
12
U20
GND3
21
GND4
22
GND5
23
GND6
24
GND7
25
GND8 WCDMA1
26
GND9 WCDMA2
27
GND10 WCDMA3
28
GND11
29
GND12
30
GND13
2mm
VBATT
(1608)
TP1
- 98 - Copyright © 2009 LG Electronics. Inc. All right reserved.
C316 C318
17
1n 1n
ANT
8
ANT_SEL0
_TXEN
9
MODE ANT_SEL1
10
RSVD
13
RX4
14
RX3
15
RX2
16
RX1
18
WCDMA_2100_RTX
19
WCDMA_900_RTX
20
WCDMA_1900_RTX
R13
4
VAPC
5
VBATT
C326
39p
C278 C335
10uF
47pF

Only for training and service purposes

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