Specifications

6–7
Reference Drawings
STEREO GENERATOR
OUTPUT
+12V
+6V
+12V
-12V
2
3
1
8
4
U4A
TL072
R12
10.0K
1%
R11
100
D3
R58
3.9K
R55
24.9K
C26
1.0
2
3
1
8
4
U6A
TL072
C27
1.0
R57
24.9K
R9
2K
1%
R56
24.9K 1%
R54
24.9K 1%
C3
100PF
R3
0 OHM
C4
0 OHM
R5
1K
(SELECTABLE BY TEST, USE
EXTERNAL COMPOSIT IN
(3.5V P-P for 7.5KHz)
(3.5V P-P for 75KHz)
+12V
-12V
C1
.0027
POLY
R38
1M
R6
499
1%
3
1
2
JP1
C5
.0027
POLY
R7
3.65K
1%
C6
1030PF
2
3
1
8
4
U3A
TL072
R1
330
15.2 KHz LOW-PASS FILTER
(8th ORDER ELLIPTICAL)
LPIN L
+6V
-6V
1
2
3
4
5
6
7
14
13
12
11
10
9
8
U1
LTC1064-1
14
7
+6V
R26
1K
Y1
7.6MHZ
C13
56PF
NPO
R25
1M
1
2
U7A
74HC04
C14
33PF
NPO
C29
1.0
R27
100
CK
1
CK
4
CLR
2
Q
3
Q
5
QC
6
QD
7
U8A
74HC390
13
12
U7F
C24
1.0
D1
1N5818
C23
1.0
D2
1N5818
1
2
3
4
5
6
7
14
13
12
11
10
9
8
U2
LTC1064-1
1.52 MHz
3.8 MHz
14
8
16
14
50 75
50 75
LPOUT R
INPUT R
+6V
+5.00V
CK
15
CK
12
CLR
14
QA
13
QB
11
QC
10
QD
9
U8B
74HC390
A
13
Q
11
Q
10
QC
9
QD
8
CLR
12
U9B
74HC393
4
5
6
U10B
R29
100K
1%
C15
0.1
L
P
A
1
L
P
B
2
0
B
P
A
2
H
P
A
3
I
N
V
A
4
S
1
A
5
B
P
B
1
9
H
P
B
1
8
I
N
V
B
1
7
S
1
B
1
6
S
A
/
B
6
V
A
+
7
V
D
+
8
L
S
H
9
C
L
K
A
1
0
A
G
N
D
1
5
V
A
-
1
4
V
D
-
1
3
5
0
/
1
0
0
1
2
C
L
K
B
1
1
U11
LMF100
R33
10.0K
1%
C11
.01
POLY
C31
1.0
R28
243K
1%
C30
1.0
C2
.0027
POLY
R2
330
3
1
2
JP2
R18
499
1%
C9
.0027
POLY
R19
3.65K
1%
C10
1030PF
R39
1M
6
5
7
U3B
TL072
3 1
2
JP4
R8
4.99K
1%
3
1
2
JP3
C7
.01
POLY
R34
49.9K
1%
R20
4.99K
1%
R10
2.49K
1%
R22
2.49K
1%
1
2
3
U10A
74HC86
38 KHz
3.0VP-P
8
7
16
SEPARATION
(•3.85V P-P)
R204
1K
+12V
-12V
MON L
MON R
COMP METER
SYNC OUT
MONO/STEREO
/EXT ENABLE
+12V
+6V
-12V
-6V
-12V
C17
0.1
R37
1K
C18
.0027
POLY
R40
10K
7
9
1
12
13
2
10
14
311
U12
B-B 4214
R32
10K
C21
0.1
R47
20K
C37
OPEN
R48
4.3K
R17
100
R21
10K
R53
10K
6
5
7
U4B
TL072
R24
100
D6
X0
12
X1
13
Y0
2
Y1
1
Z0
5
Z1
3
INH
6
A
11
B
10
C
9
X
14
Y
15
Z
4
U5
74HC4053
C28
1.0
6
5
7
U6B
TL072
R16
100
R14
1K
R15
4.02K
1%
R13
24.9K
1%
R23
24.9K
1%
4.12K OR 4.15K IF NEEDED)
12
34
56
78
910
J3
RECEPT 5X2
19 KHz
3.3VP-P
19 KHZ LEVEL
STEREO
X1
EXTERNAL COMPOSITE
U205 Connections
X
SCA IN
COMP OUT
COMP METER
/EXT ENABLE
EXT IN
EXT RTN
GND
MONO/STEREO
U5Y
R43
33K
R41
510
1
2
3
4
5
6
7
8
9
10
11
12
J1
RECEPT 12X1
C19
0.1
C20
.0027
POLY
1.9MHz
304 Khz
7
7
+12V
-6V
+12V
+6V
C33
1.0UF
C34
1.0UF
R49
240
IN
1
C
2
OUT
3
VR1
LM317
C16
0.1
C32
1.0
R30
243K
1%
9
10
8
U10C
74HC86
12
13
11
U10D
A
1
QA
3
QB
4
QC
5
QD
6
CLR
2
U9A
74HC393
R35
10.0K
1%
R36
49.9K
1%
R31
100K
1%
R50
910
7.6 MHz
CLK
QA
QB
QC
QD
QB XOR QD
QC XOR QD
QB XOR QC
QA XOR QC
Current at U211 pin 4.
Current at U211 pin 17.
-12V
-12V -6V
C35
1.0
IN
1
C
2
OUT
3
VR2
LM337
R52
910
R51
240
11
10
U7E
74HC04
9
8
U7D
74HC04
5
6
U7C
74HC04
3
4
U7B
74HC04
C36
47UF
MONO
STEREO/MONO
Z
C
X0
B
Y
A
Y1
Y0
Z1
Z0
MON L
MON R
+5.00V
SYNC OUT
INPUT L
INPUT R
GND
LPIN L
LPOUT L
LPIN R
LPOUT R
+5.00V
1
2
3
4
5
6
7
8
9
10
11
12
J2
RECEPT 12X1
U5X
U5Z
U206, pin6
/EXT EN
NOTES :
_______
_______
1. ALL RESISTORS ARE IN OHMS, 1/4W, 5% UNLESS OTHERWISE SPECIFIED.
2. ALL CAPACITORS ARE IN MICROFARADS UNLESSOTHERWISE SPECIFIED.
CROWN INTERNATIONAL, INC.
1718 WEST MISHAWAKA ROAD ELKHART, IN. 46517 PHONE [phone]
DO NOT SCALE PRINT
SUPERSEDES
REV
ME
EE
PE
APPROVED BY :DRAWN
CHECKED
SCALE NONE
PROJ #
DWG. NO.
E.C.
JFL
NEXT ASM:FILENAME:
A
SCM, FM STEREO GENERATOR
7-28-97
MLOWCM0
103203
103203A.SCM
3. ALL DIODES ARE 1N4148 UNLESS OTHERWISE SPECIFIED.
COMP OUT
LPIN R
LPOUT L
R242 1K
R244 10K
INPUT L
C12
5.5—18PF
EXT RTN
EXT IN
SCA IN
D4
D5
19 KHZ PHASE
R46
10K
JB
1