LG KP270 Service Manual page 106

GND501
ANT_SEL2
ANT_SEL6
TP5
TP6
ANT_SEL1
ANT_SEL4
VC1 VC1
(TP1) (TP1)
850/900 Tx 850/900 Tx 1 1
1800/1900 Tx 1800/1900 Tx 1 1
850 Rx 850 Rx 0 0
900 Rx 900 Rx 0 0
1800 Rx 1800 Rx 0 0
1900 Rx 1900 Rx 0 0
UMTS1 UMTS1 0 0
UMTS2 UMTS2 0 0
UMTS3 UMTS3 0 0
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
ANT501
R502
270 : 100pF
0 275 : 10pF
GND502 ANT502
R505
C501 100p
DNI
L532
8.2nH
270 : 8.2nH 270 : 18nH
275 : 12nH 275 : DNI
TP11
2V85_VRF
FB503
C540
1000p
R516
R517
R518
R519
2V85_VRF
U505
NL27WZ32USG
1 8
A1 VCC
2 7
B1 Y1
3 6
Y2 B2 ANT_SEL3
4 5
GND A2 ANT_SEL5
VC2 VC2 VC3 VC3 VC4 VC4
(TP2) (TP2) (TP3) (TP3) (TP4) (TP4)
0 0 0 0 0 0
1 1 0 0 0 0
1 1 1 1 0 0
0 0 1 1 0 0
0 0 0 0 0 0
1 1 0 0 0 0
0 0 0 0 1 1
1 1 0 0 1 1
0 0 1 1 1 1
4. TROUBLE SHOOTING
TP9
G1
ANT RF
G2
SW501 KMS-512_P
L533
18nH
TP10
FL501 LMSP43QL-771
GSM850_900TX
GSM1800_1900TX
2
ANT GSM850_RX1
GSM850_RX2
GSM900_RX1
GSM900_RX2
GSM1800_RX1
GSM1800_RX2
GSM1900_RX1
1
GND1 GSM1900_RX2
8
GND3
10
GND2
23
C541
GND4
24
0.1u GND5
1K
1K
1K
1K
C553
1u
TP7
TP8
ANT_SEL1 ANT_SEL1 ANT_SEL3 ANT_SEL3
ANT_SEL2 ANT_SEL2
(TP6) (TP6) (TP8) (TP8)
0 0 1 1
1 1 1 1
1 1 0 0
0 0 0 0
0 0 0 0
1 1 0 0
0 0 0 0
0 0 0 0
0 0 0 0
- 107 -
11
GSM_PAOUT_LB
9
GSM_PAOUT_HB
12
13
14
15
16
17
18
19
20
UMTS1 3G_RF_BC5_8
21
UMTS2
22
UMTS3 3G_RF_BC1
TP1
TP2
TP3
TP4
ANT_SEL4 ANT_SEL4 ANT_SEL5 ANT_SEL5
ANT_SEL6 ANT_SEL6
(TP7) (TP7) (TP9) (TP9)
0 0 0 0 0 0
0 0 0 0 0 0
1 1 0 0 0 0
1 1 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
0 0 1 1 0 0
0 0 0 0 1 1
LGE Internal Use Only
0 0
0 0
0 0
0 0
0 0
0 0
1 1
1 1
1 1