LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
- 87 -
4.6.2 Checking Ant. SW Module
Refer to chapter 4.4
4.6.3 Checking RF Tx level
TP1
TP3
TP2
LOW
DCS/PCS TX
LOW
IN_A
DCS RX
PCS RX
LOW
HIGH
LOW
HIGH
ANTENNA SWITCH MODULE LOGIC
(1%)
IN_C
HIGH
HIGH
GSM900 RX
HIGH
LOW
LOW
HIGH
HIGH
LOW
LOW
GSM/EDGE
GSM 850 RX
HIGH
LOW
HIGH
UMTS 1900
HIGH
LOW
LOW
UMTS 850
HIGH
GSM900/GSM850 TX
LOW
IN_B
HIGH
0.5p
C1828
NA
L117
R1000
1K
NA
L121
33p
C1009
KMS-507
ANT
G1
G2
RF
SW100
56nH
L105
33p
C1046
33p
C1023
1K
R1001
NA
L116
C1000 56p
68p
C1038
C1007
33p
NA
L104
100p
C1511
L172
4.7nH
1
IN
3
O1
4
O2
B7837
FL102
2
G1
5
G2
R1008
2.2K
4p
1K
R1002
C1014
100p
C1056
51p
0.75p
C1001
33p
C1008
33p
C1019
0.5p
C1827
15
TX_EN
VBATT
4
VCC21
8
VCC22
18
13
VCC_OUT
VRAMP
6
5
VREG
BS
2
1
DCS_PCS_IN
DCS_PCS_OUT
16
9
GND1
11
GND2
GND3
12
GND4
14
15
GND5
GND6
17
GSM_IN
7
GSM_OUT
10
19
PGND1
PGND2
20
21
PGND3
3
U102
AND0041
C1910 27p
30
NC9
PGND1
29
31
PGND2
RX1
5
4
RX2
RX3
3
2
RX4
21
TRX1
19
TRX2
TX1
13
TX2
11
25
VDD
GND1
1
6
GND2
12
GND3
18
GND4
GND5
20
GND6
22
GND7
24
NC1
7
32
NC10
8
NC2
NC3
9
10
NC4
14
NC5
NC6
15
16
NC7
NC8
17
CXG1198AEQ
U100
23
ANT
CTL-A
26
27
CTL-B
CTL-C
28
6.8nH
L402
33p
C1011
0.1uF
C1010
ANT100
L1001
6.8nH
NA
L103
WCDMA_800
WCDMA_1900
Schematic of RF TX Level
TP1
TP2
TP3
Содержание TU550
Страница 1: ...Date May 2007 Issue 1 0 Service Manual Model TU550 Service Manual TU550 Internal Use Only ...
Страница 151: ... 152 LGE Internal Use Only Copyright 2007 LG Electronics Inc All right reserved Only for training and service purposes ...
Страница 161: ... 162 LGE Internal Use Only Copyright 2007 LG Electronics Inc All right reserved Only for training and service purposes ...
Страница 185: ...Note ...
Страница 186: ...Note ...