LG -P500 Service Manual page 99

4. TROUBLE SHOOTING
ANT1002
ANT1003
R1005
0.75p
C1007
100p
R1006
GSM_PA_RAMP
2.2K
DCS_PCS_TX
DCS(1710-1785 MHz)
PCS(1850-1910 MHz)
GSM_TX
GSM850(824-849MHz)
GSM900(880-915MHz)
2mm
+VPWR_RF
C1043
10u
LGE Internal Use Only
R1004
C1003
3.3n
15p
C1009
8.2n
C1024
39p
TP3
R6
47
7dB
TP2
R7
75
11dB
0603
0603
C1045 1n
C1044
C1047 1n
47p
C1048 1n
C1051 1n
ANT_SEL3
ANT_SEL2
ANT_SEL0
ANT_SEL1
Schematic of GSM/DCS/PCS Tx Block
GND
3 4
G3 G4
1
ANT COMMON
2
SW1001
TP1
C1005
L11
DNI
1
DCS_PCS_IN
2
GND1
3
GSM_IN
4
VAPC
5
VBATT
6
BS2
U1002
7
BS1
8
_TXEN
29
PGND1
30
PGND2
31
PGND3
32
PGND4
33
PGND5
34
PGND6
- 100 -
Copyright © 2010 LG Electronics. Inc. All right reserved.
33p
L1004
18n
44
PGND16
43
PGND15
42
PGND14
41
PGND13
22
GND5
21
GND4
20
GND3
19
GND2
18
ANT
17
WCDMA3
16
WCDMA2
15
WCDMA1
40
PGND12
39
PGND11
38
PGND10
Only for training and service purposes