LG E900 Service Manual page 80

GSM_PA_RAMP
DCS_PCS_TX
DCS(1710-1785 MHz)
PCS(1850-1910 MHz)
GSM850(824-849MHz)
GSM900(880-915MHz)
+VPWR
Copyright © 2010 LG Electronics. Inc. All right reserved.
Only for training and service purposes
R105
2.2K
C182
39p
R117
47
7dB
R111
GSM_TX
75
11dB
2mm
C155
C216
10u 47p
ANT_SEL0
ANT_SEL1
ANT_SEL2
ANT_SEL3
C178 1n
C176 1n
C173 1n
C171 1n
0603
ENWY0008701 (2.3X2.3X1.4)
TP1
SW102
C174 33p
2
ANT COMMON
1
G3 G4
3 4
1
DCS_PCS_IN
2
GND1
3
GSM_IN
4
VAPC
5
VBATT
6
BS2
U104
7
BS1
8
SKY77544
_TXEN
SMRH0006201
29
PGND1
30
PGND2
31
PGND3
32
PGND4
33
PGND5
34
PGND6
- 81 -
4. TROUBLE SHOOTING
L135
100n
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
LGE Internal Use Only