SOUTHERN AVIONICS COMPANY
Model SA100 Dual
2-56
Theory of Operation, Radiobeacon
Figure 2-40. SA Exciter Control Motherboard Schematic
ATK2
GND
AUDM
GND
ATK2
ATK2
TSL
+12V
TSL
TSL
KET1
KET1
KET1
+12V
RST
RST
SDO1
SDO1
SDO1
RST
RST
+5V
RST
SDO
RST
AUD2
GND
AUD2
AUD2
GND
ATK1
ATK1
ATK1
INTEL1
+12V
GND
MOD
INTEL2
KET2
GND
AUD3
CODE TRAIN
CODE TRAIN
LOAD/SHIFT
CLOCK
SDO2
MON
MON
MON
MON
KMC
XSDI
+12V
+5V
+5V
SQL
SQL
SQL
GND
MTK
+12V
MTK
CARR OUT
UBAL AUD I
N
UBAL AUDIO IN
RFL
UBAL AUDIO IN
SHTDN
RFL
FWD
MOD
MON
XSDI
SDO2
MSD
+12V
CODE TRAIN
RST
+5V
CLOCK
LOAD/SHIFT
+12V
SDO
+5V
AUD2
SQL
MON
GND
GND
GND
+12V
+12V
CODE TRAIN EXT
LOAD/SHIFT
CLOCK
+5V
SDO1
GND
LOAD/SHIFT
CLOCK
+5V
RST
AUD2
SQL
+12V
CODE TRAIN EXT
GND
GND
+5V
+12V
GND
GND
AUDM
FWD
+12V
KMC
+12V
+12V
SDO1
SHTDN
SDO1
SDO1
AUD2 ATK1
+12V
AUD2
KMC
FWD
RFL
MOD
CARR 1
EXCV
LV OUT
LV IN
CARR 5
CARR 4
CARR 3
CARR 2
CARR OUT
+5V
+12V
+12V
+5V
+5V
+5V
+5V
NOTES 1. THIS DRAWING NO. SEP40600 REV. A. 2. TITLE: EXCITER MOTHERBOARD PCB SCHEMATIC. 3. ASSEMBLY DWG. NO. SAP40600. 4. ALL RESISTORS 1/4W, UNLESS NOTED. 5. ALL CAPACITORS IN uF, UNLESS NOTED.
INTEL TO RFMB
AUDIO INPUT
KEY
* JP1 NOT USED WITH UK SERIES MONITOR PCB ( SLP40700)
* C8 USED ONLY WITH UNBALANCED AUDIO INPUT - FACTORY SELECT
* JP3 USED WITH AUDIO OPTION
33
9
8
U2DU2D
TP2TP2
1
2
3
4
5
6
7
8
9
10
11
12
13
14
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
XA7
MONITOR
XA7
MONITOR
+
C6 6.8
+
C6 6.8
R4 10K
R4 10K
TP1TP1
R5 680
R5 680
55
11
1
2
14
7
U2A 1U740600
U2A 1U740600
TP5TP5
1
2
3
4
5
6
7
8
9
TB2TB2
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
XA4
CODE SHIFT REGISTER
XA4
CODE SHIFT REGISTER
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
E1E1
+
C5 33
+
C5 33
11
10
U2EU2E
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
XA1
SYNTHESIZER
XA1
SYNTHESIZER
C7 0.01
C7 0.01
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
TB1TB1
22
A1A8CRA1A8CR
+
C2 6.8
+
C2 6.8
R1 39K
R1 39K
JP3JP3
Q1 1T372500
Q1 1T372500
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
E3E3
TP6TP6
TP4TP4
13
12
U2FU2F
C9 0.1
C9 0.1
R3 100K
R3 100K
+
C8 *
+
C8 *
5
6
U2CU2C
44
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
J1J1
3
4
U2BU2B
+
C3 6.8
+
C3 6.8
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
XA6 AUDIO
XA6 AUDIO
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
XA2
TONE KEY
XA2
TONE KEY
R6 1K
R6 1K
IN
1
OUT
3
GND
2
U1
1U780500
U1
1U780500
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
XA5
CODE SHIFT REGISTER
XA5
CODE SHIFT REGISTER
+
C4 33
+
C4 33
C1 0.068 50V
C1 0.068 50V
JP2JP2
TP3TP3
1 2 3 4 5 6 7 8 9 10 11 12 13 14
J2J2
JP1JP1
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
E2E2
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
XA3
KEYER CODE
XA3
KEYER CODE
Q2 1T372500
Q2 1T372500
Summary of Contents for SA100
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