Checking Front-End Module Block - LG KU380 Service Manual

4.5 Checking Front-End Module Block

VREG_RF_SMPS
ANT_SEL0
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
TP1
L106
19
VDD
7.5nH
C110
10p
7
GND1
8
GND2
10
GND3
12
GND4
13
GND5
15
GND6
17
GND7
20
GND8
21
GND9
23
GND10
Schematic of the Front-End Module Block
TP1
Test Point of the Front-End
Module Block
4. TROUBLE SHOOTING
5
GSM900_RX1
6
GSM900_RX2
1
GSM1800_RX1
2
GSM1800_RX2
3
GSM1900_RX1
4
GSM1900_RX2
9
WCDMA2100
D5011 18
CTRL1
22
CTRL2
16
GSM900_TX
14
GSM18001900_TX
- 79 -
ANT_SEL0
1K R102
ANT_SEL1
1K R103
C116 C117
33p 33p
ANT_SEL1
LGE Internal Use Only