Crest Audio 21 a 1003 Service Manual
8
7
6
5
4
3
2
1
R1
D D
1K/2W
LED3
D1 1N4004
D2 1N4004
R3
100
CLIP
Z3
1N4733
RELAY B
RELAY A
SIG GND
A RETURN
A SEND
C C
B SEND
B RETURN
SIG GND
8
7
6
5
4
3
2
1
D3 1N4004
D4 1N4004
VR1
5K
R14 3.32K/1%
J2
PREAMP CONN.
GROUND
GROUND
CLIP B+
SIGNAL B
CLIP BMUTE B
+20 V.
MUTE A
CLIP ASIGNAL A
B B
CLIP A+
GROUND
GROUND
1
2
3
4
5
6
7
8
9
10
11
12
13
J1
PWR SUPPLY CONN
R11
1K/0.5W
Q1 MPSA75
R9
2.2K
GRN
LED7
R7
100/1W
D9
1N4004
LED1
SIGNAL
TEMP/DC
VR2
5K
LED5
46
5
R12
2.7K
R2
1K/2W
R15
3.32K/1%
21
0C1
CLM5010
R5
27
D5
D6 1N4004
D7 1N4004
D8
5
1N4004
1N4004
46
21
0C2
CLM5010
R4
100
LED2
SIGNAL
R6
27
Z4
1N4733
LED4 CLIP
12/8/92 OC1, OC2
BECAME VTL5C6
TEMP/DC
LED6
Q2 MPSA75
R13
2.7K
D10
1N4004
R8
100/1W
A A
R10
2.2K
11/22/95 CHANGED R12, R13
AS PER ECO 811R
CREST AUDIO INC.
150 FLORENCE AVE.
HAWTHORNE, NJ 07506
Title
FA601/901/1201 DISPLAY
Size Document Number Rev
21A1003
A
8
7
6
5
4
3
2
Date: Sheet of
0 0Thursday, January 24, 2002
1
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