LG KS20 - Checking Rf Rx Block

LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4.7.5 Checking RF Rx Block
Schematic of `GSM900/DCS/PCS Rx Block
4. TROUBLE SHOOTING
- 100 -
TP1. DCS RX INPUT
TP2. PCS RX INPUT
TP3. GSM RX INPUT
GSM(925-960 MHz)
DCS(1805-1880 MHz)
PCS(1930-1990 MHz)
010001
27nHL509
L511 27nH
L505 5.6nH
5.6nHL503
33p
C503
L507
12nH
15nH
L504
33nH
L510
5.6nH
L508
VRF_SMPS
C509
0.1u
100nH
L502
13
7
NC
22
PCS_RX1
PCS_RX2
21
9
UMTS_TX_RX
VDD
ANT
11
DCS_PCS_TX
3
DCS_RX1
20
DCS_RX2
19
EGSM_RX1
24
23
EGSM_RX2
6
EGSM_TX
0
15nH
L501
5.6nHL506
TP1
TP2
TP3
TP3