LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
- 91 -
(1%)
(1%)
5.6nH
L113
C1911
5.6p
C1027
820p
2
G1
5
G2
1
IN
3
O1
4
O2
B7844
FL103
C1030
1000p
L119
4.7nH
B7845
G1
2
G2
5
IN
1
O1
3
O2
4
00
FL100
1K
R1006
11K
NA
L121
p
009
VREG_RFRX_2.85V
L123
6.8nH
4.7nH
L118
4.7nH
L126
L102
4.7nH
5.6n
C1045
ECHU1C562JX5
R1004
1.8K
100
R1036
R1005
3.3K
33p
C1444
4.7nH
L127
1000p
C1020
1nH
L107
C1026
NA
1
IN
3
O1
4
O2
B7837
FL102
2
G1
5
G2
VREG_RFTX_2.85V
4.7nH
L125
008
2K
C1032
15p
C1040
330p
1000p
C1006
C1912
5.6p
2.2nH
C1029
100p
L114
33p
C1043
C1028
0.01u
IN
3
O1
4
O2
B7851
FL101
2
G1
5
G2
1
L101
15nH
C1015
33p
C1004
33p
2.2nH
L110
1000p
C1033
6.8nH
L111
4.7nH
L128
L106
NA
4.7nH
L108
0
R1037
0.5p
C1829
C1031
ECHU1C103JX5
10n
VDDA9
31
TX_MOD_C
40
42
TX_VCO_F
36
VDDA10
VDDA11
39
41
VDDA12
GSM900_IN
38
37
GSM900_IN
32
RX_VCO_I
33
R_BIAS
30
CP2
29
CP_HOLD2
GSM1800_
34
35
GSM1800_
33p
C1016
33p
C1011
C1048
33
R1010
1p
C1141
0.1uF
C1010
L100
1nH
C1041
22n
120p
C1039
FB100
L124
4.7nH
ANT_SEL0
ANT_SEL2
ANT_SEL1
GSM_PA_RAMP
CP2_OUT
UHF_LO_BUFF
Schematic of GSM850/GSM900/DCS/PCS Rx Block
Summary of Contents for TU550
Page 1: ...Date May 2007 Issue 1 0 Service Manual Model TU550 Service Manual TU550 Internal Use Only ...
Page 185: ...Note ...
Page 186: ...Note ...