SOUTHERN AVIONICS COMPANY
Model SA100 Dual 2-69Theory of Operation, Radiobeacon
Figure 2-51. Page 1 Autotransfer Logic Schematic
+5V
+5V
+5V
+5V
+5V
+5V
+5V
U6-2/U7-7
U6-4/U7-12
U6-6/R14
U4-4/U7-11
U4-10/U7-6
U2-12/R25
FAIL INDICATION CTRL
SEC INDICATION CTRL
PRI INDICATION CTRL
IG
IG
G
ET
NOTES
1. THIS DRAWING NO. SEP09906 REV. M.
2. TITLE: AUTOTRANSFER LOGIC PWB SCHEMATIC.
3. ASSEMBLY DWG. NO. SAP09906.
4. ALL RESISTORS 1/4W, UNLESS NOTED.
5. ALL CAPACITORS IN uF, UNLESS NOTED.
6. JP1 AND JP2 NOT USED ON SLP09906.
R9
330K
R9
330K
CR2
1D523600
CR2
1D523600
R23
10K
R23
10K
DOUT
4
CIN
3
FOUT
6
OSCIN
7
DIN
12
EOUT
11
BIN
14
AOUT
15
EIN
5
BOUT
2
OSCOUT
9
FIN
10
AIN
1
VDD
16
VSS
8
COUT
13
U3
1U144900
U3
1U144900
R16
3.9K
R16
3.9K
8
9
10
U5CU5C
3 2
18
U2A
1U404900
U2A
1U404900
5 4
U6BU6B
5
6
4
U1BU1B
1
2
3
147
U4A
1U407000
U4A
1U407000
7 6
U6CU6C
11 12
U2EU2E
R20
10K
R20
10K
R1
22K
R1
22K
+
C5
6.8
+
C5
6.8
R2
10K
R2
10K
R17
10K
R17
10K
Q6
1T344000
Q6
1T344000
CR3
1D400400
CR3
1D400400
9 10
U2DU2D
5
6
4
U5BU5B
5
6
4
U4BU4B
Q5
1T344000
Q5
1T344000
C13
0.1
C13
0.1
1
2
3
147
U5A
1U400100
U5A
1U400100
3 2
18
U6A
1U404900
U6A
1U404900
12
13
11
U4DU4D
+
C1
33
+
C1
33
C2
0.1
C2
0.1
5 4
U2BU2B
+
C3
6.8
+
C3
6.8
Q4
1T344000
Q4
1T344000
C7
0.1
C7
0.1
CR1
1D523600
CR1
1D523600
8
9
10
U1CU1C
R6
220K
R6
220K
1
2
3
147
U1A
1U401100
U1A
1U401100
C11
0.1
C11
0.1
R5
10K
R5
10K
14 15
U2FU2F
C12
0.1
C12
0.1
R22
3.9K
R22
3.9K
C8
0.1
C8
0.1
7 6
U2CU2C
R3
22K
R3
22K
R4
10K
R4
10K
8
9
10
U4CU4C
C4
0.05
C4
0.05
R27
150K
R27
150K
C9
0.1
C9
0.1
R19
3.9K
R19
3.9K
12
13
11
U1DU1D
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