Crown FM30 User Manual page 73

15.2 KHz LOW-PASS FILTER
(8th ORDER ELLIPTICAL)
LTC1064-1
1 14
LPIN L
2 13
12
3
4 U1 11
+6V
5 10
6 9
7 8
LTC1064-1
1 14
LPIN R 2
13
3 12
4
U2 11
5
10
6
9
7 8
C24 C23
D1
1.0 1.0
1N5818
+6V
R27
R26 C29
100
1K 1.0
R25
1M
U8A
Y1
74HC390
U7F
7.6MHZ 1
14
12 CK
1 2 13 4
CK
7 2
U7A
CLR
C13 C14
74HC04
56PF C12 33PF
NPO NPO
5.5—18PF
7.6 MHz
CLK
QA
QB
QC
QA XOR QC
QB XOR QC
Current at U211 pin 4.
QD
QB XOR QD
QC XOR QD
Current at U211 pin 17.
Reference Drawings
JP1
INPUT L 1 3
2
-6V
R1
330
R6
LPOUT L
499
C? R38
1%
C1
100 pF 1M
.0027
POLY
JP2
1 3
INPUT R
2
R2
330
LPOUT R R18
499
R39
C?
1M 1%
C2
100 pF
.0027
POLY
D2
+5.00V
1N5818
74HC86
1
U10A
2
1.52 MHz
4
U10B
5
16
3 15 13
Q CK QA
12 U9B
5 11
Q CK QB 74HC393
6 10 14
QC QC
14 13
7 9 11
QD CLR QD A Q
10
Q
9
8
U8B QC
12
8
304 Khz
74HC390 CLR QD
7
U9A
74HC393
3 1
QA A
4
QB
5 74HC86
QC 2 9
6
CLR
QD
U10C
10
12
13 U10D
U7B
74HC04
3 4
VR1
LM317
+12V
+12V 1 3
U7C IN OUT
74HC04
C33 C
5 6
1.0UF R49
2
240
U7D
74HC04
9 8 R50
910
U7E
74HC04
11
10
VR2
LM337
-12V
-12V 1 3
IN OUT
C35 C
1.0 R51
2
240
R52
910
R54 24.9K 1%
EXT RTN
EXTERNAL COMPOSIT IN
(3.5V P-P for 75KHz)
2
R56
24.9K 1%
EXT IN 3
R57
24.9K
C5 (3.5V P-P for 7.5KHz)
.0027 SCA IN
POLY
R3
0 OHM
+12V
8
R7
2 U3A
3.65K TL072
1
1% 3
+12V
4
C6
8
1030PF R11
2
-12V R10
R8 100
1
2.49K 1%
4.99K 1%
3
4 U4A
1 3
TL072
C9 JP3
2
.0027 POLY
50 75 -12V
C7
.01 POLY
6
R19
7
3.65K 1%
5
U3B
TL072
C10 R22
R20 R24
6
2.49K
1030PF 4.99K 100
7 MON R
1% 1%
5
U4B
1 3
TL072
JP4
2
50 75
C11
C30
.01 POLY
1.0
+6V
R204
1K
SYNC OUT
14
R28
C31
243K 1%
1.0
3
C17
C15
R33 0.1 R37
0.1
1K
10.0K 1%
6
38 KHz
R29
3.0VP-P
100K 1%
R34
49.9K
1%
3.8 MHz
C18
R40
1 .0027
10K
0 9 8 7 6 5 4 3 2 1 POLY
C L V V S S I H B L
L S D A A 1 N P P P
H + + / A V A A A
K
B A
A
U11
C21
5
0 LMF100
0.1
C
/ A I
L 1 V V G S N H B L
K 0 D A N 1 V P P P
0 - - D B B B B B
B
1 1 1 1 1 1 1 1 1 2
1 2 3 4 5 6 7 8 9 0
1.9MHz
R36
R30
49.9K
243K
1%
1%
8 19 KHZ PHASE
R35 R41
11
C19
C16 0.1 10.0K 1% 510
0.1
R31
100K
7
1% C20
.0027
POLY
C32
1.0
+6V
-6V
C34 U205 Connections
1.0UF
EXTERNAL COMPOSITE
U5Y X1
STEREO X
X0
B
-6V
U5Z
Z1
U206, pin6
Z
C36 U5X
Y1 Z0
47UF
MONO Y
/EXT EN
Y0 C
STEREO/MONO A
+12V
R55 24.9K
C26
1.0
8
R58
3.9K
1
U6A
4 TL072
D3
D4
C27
C4
-12V 1.0
R5
0 OHM
1K
C3
100PF
R12
10.0K
1%
R9
2K 1%
+6V
OUTPUT
MON L C28
1.0
R14 1K
U5
74HC4053
D5
16
12 14
X0 X
13
X1
15
Y
2
Y0
1 4 6
D6
Y1
Z
5 5
Z0
3
Z1
6
INH
11
A
MONO/STEREO 10
B
9
C
+6V
R21
7
8
10K
R53
-6V
10K
/EXT ENABLE
R13
24.9K 1%
R23
24.9K 1%
C37 -12V
+12V OPEN +12V
U12
B-B 4214
14
7
1
R48
9
4.3K
2
13
12 10
11 3
SEPARATION
R46
10K
-12V
R32
R47
10K
20K
RECEPT 12X1
19 KHZ LEVEL
R43
33K
R242 1K R244 10K
19 KHz
3.3VP-P
NOTES :
_______
_______
1. ALL RESISTORS ARE IN OHMS, 1/4W, 5% UNLESS OTHERWISE SPECIFIED.
RECEPT 12X1
2. ALL CAPACITORS ARE IN MICROFARADS UNLESSOTHERWISE SPECIFIED.
3. ALL DIODES ARE 1N4148 UNLESS OTHERWISE SPECIFIED.
1718 WEST MISHAWAKA ROAD ELKHART, IN. 46517
SCM, FM STEREO GENERATOR
DRAWN JFL 7-28-97 APPROVED BY : DO NOT SCALE PRINT
CHECKED JB 1 ME SUPERSEDES
SCALE NONE EE E.C.
DWG. NO.
PROJ # MLOWCM0 PE
1 0 3 2 0 3
FILENAME: 103203A.SCM NEXT ASM:
R15 (SELECTABLE BY TEST, USE
4.02K 4.12K OR 4.15K IF NEEDED)
1%
R16
100
7 COMP OUT
(•3.85V P-P)
U6B
TL072
R17
100
COMP METER
J3
10 9
8 7
6 5
4 3
2 1
RECEPT 5X2
J1
1 EXT IN
2
EXT RTN
3
SCA IN
4
COMP OUT
5
COMP METER
6
MONO/STEREO
7
/EXT ENABLE
8
GND
9
INPUT L
10
INPUT R
11
12
J2
1
MON L
2
MON R
3
4
GND
5
LPIN L
6
LPOUT L
7
LPIN R
8
LPOUT R
9
+5.00V
10
+5.00V
SYNC OUT
11
12
PHONE (219) 294-8000
REV
A
Stereo Generator
6–7