LG U990 Service Manual page 109

4. TROUBLE SHOOTING
4.6.4 Checking RF Rx Level
KMS-518
SW100
C101 120p
L102
NA
FL100
5 10
VC1 ANT
4
VC2
3 6
VC3 VDD
7
NC
1
GND1
2 8
GND2 UMTS_TX_RX
9 13
GND3 DCS_PCS_TX
11 16
GND4 EGSM_TX
12
GND5
14 19
GND6 DCS_RX2
15 20
GND7 DCS_RX1
17 21
GND8 PCS_RX2
18 22
GND9 PCS_RX1
25 23
PGND1 EGSM_RX2
26 24
PGND2 EGSM_RX1
LSHS-M090UH
Schematic of GSM-900, DCS-1800, PCS-1900 Rx Block
LGE Internal Use Only
VREG_RF_SMPS
C109
47p
GSM
TP1 TP2 TP3
Test Point of Rx Block
- 110 -
L103 5.6nH
DCS
L105 5.6nH
L106 5.6nH
L107
TP2
PCS
15nH
5.6nH
L108
L109 22nH
TP1
L110
22nH
L111 22nH
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
TP3
L104
15nH