Checking Rf Rx Block - LG KS20 Operating Instructions Manual

4. TROUBLE SHOOTING

4.7.5 Checking RF Rx Block

Schematic of `GSM900/DCS/PCS Rx Block
C503
33p
L502
100nH
0
11
ANT
13
VDD
7
NC
3
DCS_PCS_TX
6
EGSM_TX
9
UMTS_TX_RX
19
DCS_RX2
20
DCS_RX1
21
PCS_RX2
22
PCS_RX1
23
EGSM_RX2
24
EGSM_RX1
010001
LGE Internal Use Only
L501
VRF_SMPS
15nH
C509
0.1u
TP3
- 100 -
TP1. DCS RX INPUT
TP2. PCS RX INPUT
TP3. GSM RX INPUT
DCS(1805-1880 MHz)
TP1
PCS(1930-1990 MHz)
TP2
TP3
GSM(925-960 MHz)
Copyright © 2007 LG Electronics. Inc. All right reserved.
L503 5.6nH
L504
15nH
L505 5.6nH
L506 5.6nH
L507
12nH
5.6nH
L508
L509 27nH
L510
33nH
L511 27nH
Only for training and service purposes