Crest Audio 21 c 1348 2 Service Manual
8
D D
7
6
5
4
3
2
1
R10 470
C1 0.1/100V
1
2
3
4
5
6
7
8
J3
CH A OCTAL
21
3
J1
CH A XLR
BAR1
1
2
3
4
5
6
INPUT BARRIER
26-48-1136
CH B OCTAL
J6
1
2
3
4
5
6
7
8
9
10
11
12
13
1
2
3
4
5
6
7
8
J4
+18V
-18V
21
ANALOG GND
C C
RETURN CH B
SEND CH B
ANALOG GND
RETURN CH A
SEND CH A
ATTENUATE CH B
ATTENUATE CH A
+12 V
DATA CH A
DATA CH B
+16 V
10K/1%
10K/1%
R3
NOTE 1
SW1
R23
R22
NOTE 2:
3
J2
CH B XLR
R21
MSSA2350
1N4148
NOTE 1
1N4148
D3
0.1/100V
R4
C3
30pF
D1
D5
1N4148
1N4148
C2
R26
10K/1%
R27
10K/1%
R28
NOTE 2
NOTE 2
C5 30pF
+18V
C30
84
-
+
CP
1
IC1A
OPA2604AU
2
3
D7
C31
CP
-18V
220K
220pF
R6
C29
R34
1.5K
R35
+18V
5
+
7
6
IC1B
-
NE5532
1.5K
R44
C12
1/63V
C14
R45
10/16V/BP
3.3K
750
1N4148
R39
1.5K
R36
750
R37
R38
3.3K
NE5517AN
10K
IC3
R40
10K
C28
+18V
C6 30pF
D2
R25 NOTE 2
220pF
220K
R5
5
+
6
- IC2B
7
NE5532
R41
1.5K
1234567
10111213141516
R42
47K
8 9
R43
47K
+18V
30pF
84
2
-
1
3
IC2A
+
OPA2604AU
C4
R46
4.7K
R32
100K
4.7/35V
R33
R47
100K
4.7K
C25
4.7/35V
C26
90.9K/1%
C7
0.1/100V
1N4148
1N4148
D4
D6
1N4148
D8
R24
90.9K/1%
C8
0.1/100V
-18V
R12
6.65K/1%
C22
330pF
13
15
+
14
-
IC4B
STK3152
R2
C10 15pF
R9 470
C21
330pF
349
1
+
2
-
IC4A
STK3152
R1
R11
6.65K/1%
C9
15pF
-18V
B B
-16V
1/63V
C13
12
8
7
C11
10/16V/BP
C24
150pF
R17 100
10
11
R18 100
100K/1W/2%
100/100V
100/100V
C23
150pF
6
5
R13 100K/1W/2%
1
2
3
C20
330pF
R14
R19
4.7/1W
C17
C15
C16
0.1/100V
0.1/100V
C18
R20
4.7/1W
4
5
6
7
8
J8
CH A MODULE
T90N5D12-24
T90N5D12-24
1
2
RELAY
CH A OUT
CH A MODULE
RLY1
J9
CH B OUT
CH B MODULE
RLY2
SUPPLY GND
SUPPLY GND
R15
100
R16 100
NOTE 3
C19
330pF
R29
R30
NOTE 3
1
2
3
4
5
6
BAR2
OUTPUT BARRIER
1
2
3
4
5
6
7
8
J7
CH B MODULE
10/13/92 CHANGED J6 TO 13 PIN
NOTE 1:
FA601 = 13.3K/1%
FA901 = 12.7K/1%
FA1201 = 12.4K/1%
FA2401 = 12.4K/1%
NOTE 2:
FA601 = 30.1K/1%
FA901 = 36.5K/1%
FA1201 = 40.2K/1%
FA2401 = 44.2K/1%
NOTE 3: FA601 = 680/10W
NOTE 4:
A A
FA901 = 820/10W
FA1201 = 1K/10W
FA2401 = 1K/10W
FA601 = 1.3K/7W
FA901 = 1K/7W
FA1201 = 1.2K/7W
FA2401 = 1.2K/7W
CREST AUDIO INC.
100 Eisenhower Drive
Paramus, NJ 07652
Title
OTA PREAMP/DRIVER FOR FA SERIES
Size Document Number Rev
21C1348
C
8
7
6
5
4
3
Date: Sheet of
2
1 1Thursday, January 24, 2002
1
01
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