SOUTHERN AVIONICS COMPANY
Model SA100 Dual
2-42
Theory of Operation, Radiobeacon
Figure 2-28. Page 2 Monitor Schematic
+12V
+12V
+12V
+12V
+12V
+12V
+12V
+12V
+12V
+12V
+12V
+12V
+12V
+12V
+12V
+12V
+12V
U5-1/U4-4
CR1-A/U1-5
U5-13/U4-3
Q1-K/U4-6
SSP
SSN
SSC
MSD
SSV
XDSI
SDO2
SDO
NOTE: REMOVE JP1 FOR OPTIONAL XDSI EXTERNAL SHUTDOWN.
* JP2: 2-1: MASTER SHUTDOWN IS NOT USED 2-3: MASTER SHUTDOWN IS USED
DS1 RED
DS1 RED
R6 10K
R6 10K
TP5
CONT TONE
TP5
CONT TONE
TP8 SDO
TP8 SDO
5
4
2
+
-
U1B
+
-
U1B
S0
4
R0
3
S1
6
R1
7
S2
12
R2
11
S3
14
R3
15
EN
5
Q0
2
Q1
9
Q2
10
Q3
1
VDD
16
VSS
8
U4
1U404300
U4
1U404300
8
9
10
U3CU3C
R12 5.6K
R12 5.6K
R9 10K
R9 10K
TP1
LOW PWR
TP1
LOW PWR
C4 0.1
C4 0.1
Q3
1T700000
Q3
1T700000
C8 0.1
C8 0.1
TP9 SDO2
TP9 SDO2
R28 10K
R28 10K
TP3
NO TONE
TP3
NO TONE
R8 10K
R8 10K
Q7
1T700000
Q7
1T700000
7
6
1
3
12
+
-
U1A 1U339000
+
-
U1A 1U339000
JP1
XDSI GND
JP1
XDSI GND
R54 820
R54 820
S0
4
R0
3
S1
6
R1
7
S2
12
R2
11
S3
14
R3
15
EN
5
Q0
2
Q1
9
Q2
10
Q3
1
VDD
16
VSS
8
U2
1U404300
U2
1U404300
DS2 RED
DS2 RED
5
6
4
U3BU3B
R13 10K
R13 10K
C13 0.1
C13 0.1
R1 10K
R1 10K
1
2
3
14
7
U3A
1U407000
U3A
1U407000
R23 47K
R23 47K
R10 5.6K
R10 5.6K
C2 0.1
C2 0.1
11 12 13
10
U7CU7C
R17 10K
R17 10K
3
2
1
JP2JP2
R31 680
R31 680
12
13
11
U3DU3D
R21 10K
R21 10K
C21 .01
C21 .01
R53 2.7K
R53 2.7K
11
10
13
+
-
U1D
+
-
U1D
R3 10K
R3 10K
R48 100K
R48 100K
R5 560
R5 560
R15 10K
R15 10K
1 2 8
9
14
7
U7A
1U402500
U7A
1U402500
R11 5.6K
R11 5.6K
R40 1.0K
R40 1.0K
3 4 5
6
U7BU7B
R16 10K
R16 10K
C1 0.1
C1 0.1
9
8
14
+
-
U1C
+
-
U1C
Summary of Contents for SA100
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