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4. TROUBLE SHOOTING
4.6.4 Checking RF Rx Level
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Schematic of GSM-900, DCS-1800, PCS-1900 Rx Block
Test Point of Rx Block
DCS
GSM
PCS
15nH
L104
47p
C109
5.6nH
L103
15nH
L107
NA
L102
A
C
G1
G2
KMS-518
SW100
L109
22nH
120p
C101
12
GND5
14
GND6
GND7
15
GND8
17
18
GND9
NC
7
PCS_RX1
22
PCS_RX2
21
25
PGND1
26
PGND2
8
UMTS_TX_RX
VC1
5
4
VC2
VC3
3
VDD
6
ANT
10
DCS_PCS_TX
13
DCS_RX1
20
19
DCS_RX2
EGSM_RX1
24
23
EGSM_RX2
EGSM_TX
16
1
GND1
2
GND2
GND3
9
11
GND4
FL100
LSHS-M090UH
5.6nH
L105
5.6nH
L106
22nH
L110
L111
22nH
L108
5.6nH
VREG_RF_SMPS
TP1
TP2
TP3
TP3
TP2
TP1
Содержание U990
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