Checking Front-End Module Block - LG KF690 Service Manual

4. TROUBLE SHOOTING

4.15 Checking Front-End Module Block

SW100
G1
G2
G3 ANT
20369-001E
VREG_RF_SMPS
ANT_SEL0
ANT_SEL1
ANT_SEL2
[Fig. 4.11] Schematic of the Front-End Module Block
LGE Internal Use Only
SW101
KMS-507
G2
ANT RF
G1
TP4 TP1 TP2 TP3
C108 C109
C112
C111
0.1u
10n
10n
10n
[Fig. 4.12] Test Point of Front-End Module Block
- 98 -
C100
1
ANT
100p
2
GND1
3
GND2
8
GND3
10
GND4
20
GND5
22
GND6
23
GND7
24
GND8
WCDMA_2100
PCN_PCS_TX
GSM850_EGSM_TX
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
FL100
DGM112M02
12
PCN_RX1
13
PCN_RX2
14
PCS_RX1
15
PCS_RX2
16
EGSM_RX1
17
EGSM_RX2
18
GSM850_RX1
19
GSM850_RX2
21
9
11