SOUTHERN AVIONICS COMPANY
Model SA100 Dual 2-41Theory of Operation, Radiobeacon
Figure 2-27. Page 1 Monitor Schematic
FWD
+12V
GND
RST
MON
RFL
+12V
+12V
+12V+12V
+12V+12V +12V
+12V
+12V
+12V
+12V
+12V
+12V
CR1-A/U1-5
U5-1/U4-4
U5-13/U4-3
Q1-K/U4-6
XDSI
MSD
SSV
SSN
SSC
SSP
SDO2
SDO
NOTES
1. THIS DRAWING NO. SEP31210 REV. M.
2. TITLE: MONITOR CONTROL SA25-200 PWB SCHEMATIC.
3. ASSEMBLY DWG. NO. SAP31210.
4. ALL RESISTORS 1/4W, UNLESS NOTED.
5. ALL CAPACITORS IN uF, UNLESS NOTED.
6. R4 IS TO BE SHORTED WITH A JUMPER WIRE ON SLP31210.
7. DS3, JP5, Q4, R32, R41, R56, R57, R59 NOT USED ON SLP31210.
TP10
RESET
TP10
RESET
C20
0.01
C20
0.01
C9
0.1
C9
0.1
+
C6
33
+
C6
33
3
2
1
411
+
-
U6A
1U324000
+
-
U6A
1U324000
5
4
2
+
-
U5B
+
-
U5B
TP4
GND
TP4
GND
R27
120K
R27
120K
12
13
14
+
-
U6D
+
-
U6D
R20
100K
R20
100K
10
9
8
+
-
U6C
+
-
U6C
R42
15K
R42
15K
C10
1.0
C10
1.0
+
C16
33
+
C16
33
G
KA
Q1
1T602700
Q1
1T602700
11
10
13
+
-
U5D
+
-
U5D
9
8
14
+
-
U5C
+
-
U5C
CR3
1D414800
CR3
1D414800
C7
.001
C7
.001
C5
.001
C5
.001
TP7
FAULT TEST
TP7
FAULT TEST
+
C14
100
+
C14
100
R47
470K
R47
470K
CR1
1D414800
CR1
1D414800
TP2
+12V
TP2
+12V
5
6
7
+
-
U6B
+
-
U6B
+
C17
6.8
+
C17
6.8
R19
50K
R19
50K
Q5
1T700000
Q5
1T700000
R2
820
R2
820
+
C12
6.8
+
C12
6.8
+
C3
33
+
C3
33
R45
47K
R45
47K
3
2
1
JP3
MON
JP3
MON
C19
0.1
C19
0.1
CR2
1D414800
CR2
1D414800
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
P1
GOLD FINGERS (22X)
P1
GOLD FINGERS (22X)
R36
500K
R36
500K
TP6
SETUP
TP6
SETUP
R7
10K
R7
10K
R4
10K
R4
10K
CR4
1D414800
CR4
1D414800
CR6
1D414800
CR6
1D414800
Q2
1T222200
Q2
1T222200
C11
0.1
C11
0.1
C18
1.0
C18
1.0
R22
270
R22
270
R50
10K
R50
10K
R43
220K
R43
220K
R55
1.8K
R55
1.8K
R34
470K
R34
470K
R29
10K
R29
10K
R14
100K
R14
100K
R52
47K
R52
47K
R49
10M
R49
10M
R46
12K
R46
12K
R39
10K
R39
10K
R24
27K
R24
27K
R25
1K
R25
1K
R33
100
R33
100
R51
10K
R51
10K
R44
33K
R44
33K
R37
10K
R37
10K
R30
10K
R30
10K
R18
2.7K
R18
2.7K
R26
820
R26
820
R38
10K
R38
10K
7
6
1
312
+
-
U5A
1U339000
+
-
U5A
1U339000
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