GX20
5 – 30
CONFIDENTIAL
Figure 25 SCHEMATIC DIAGRAM (23/24)
A
B
C
D
E
F
G
H
1
2
3
4
5
6
RECEPTION SIGNAL
TRANSMISSION SIGNAL
1
2
34
56
7
8
9
1
0
1
1
1
2
1
3
1
4
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
G
BATT
G
BS2
G
BS1
G
BS0
G
RAMPDAC
G
ITXN
G
ITXP
G
QTXN
G
QTXP
G
QRXN
G
QRXP
G
IRXP
G
IRXN
G
SYNTHDATA
G
SYNTHEN
G
VTCXO
G
SYNTHCLK
G
AFCDAC
G
VRF
G
VSYNTH
G
TCXOOUT
G
VTXVCO
1
2
3
4
56
7
8
1
2
3
4
56
7
8
+B
+B
+B
+B
+B
+B
+B
+B
+B
+B
1 2 3
4
5
6
NC
1
2
3
4
5 6 7
8
Vcc
OUTPUT
GND
Vcont
1
2
3
4
VRF
VTXVCO
GSM
DCS
PCS
TX
RX
TX
RX
TX
RX
BS0
BS1
BS2
LOW
LOW
LOW
LOW
LOW LOW
LOW
HIGH
HIGH
HIGH
HIGH
HIGH
HIGH
HIGH
HIGH
HIGH
LOW
LOW
BS
GSM
DCS
PCS
VCO8
Rx
(~
50CH)
Tx,Rx
(51CH~)
LOW
HIGH
GSM
DCS
PCS
LOW
HIGH
Pin3
VCO971
KEY PWB-B(2/2)
4
6
5
14 12 11
13
20
17
,
,
18
15
,
19
16
29
27
28
,
,
,
8
7
10 9
5-29 (1-D)
5-23 (11-G)
5-28 (6-A)
5-29 (8-E)
5-27 (8-G)
5-26 (6-G)
5-29 (11-E)
5-29 (11-E)
5-29 (11-E)
5-29 (8-E)
5-29 (8-D)
5-28 (6-A)
C901
0.01
C905
0.01
C977
0.01
C976
0.01
C982
0.01
R953
10
R941
10
R942
10
C860
22P(C
C980
0.0022
C981
0.0022
C902
C921
0.01
C978
3P(CH)
C979
3P(CH)
IC901
HD155148TF
RF
IC993
NL27WZ08
LOGIC
IC992
TC7W00FK
LOGIC
FL971
BALUM
VCO971
RF VCO
C993
0.01
C922
0.01
C943
0.01
C946
0.01
C971
0.1
C873
0.001
L861
FERRITE BEADS
L971
FERRITE
BEADS
TCX951
26MHz
TCXO
C91
1
R886
10K
R871
47
R872
33
C871
100P(CH)
C861
R901
10
R905
10
C945
270P
(CH)
R944
4.7K
C952
100P
(CH)
R972
1.5K
R973
3.3K
C975
150P
(CH)
R974
4.7K
C954
0.1
C955
0.1
C889
2.2
R887
100K
C947
22P(CH)
C944
0.0018
C872
0.012
L90
8.2n
L902
8.2n
L903
2.7n
L904
2.7n
C924
220P(CH)
C923
220P(CH)
C974
0.001
C973
0.0082
L905
2.2n
L90
2.2n
L951
FERRITE BEADS
L972
FERRITE BEADS
C941
0.1
C942
0.1
L973
FERRITE BEADS
L974
FERRITE BEADS
NOTES ON SCHEMATIC DIAGRAM can be found on page 5-1.