Crest 4801 set, 21C1124 User Manual
8
7
6
5
4
3
2
1
R8
10K
VCC+
R9
1K
MPSA75
Q3
R10
R7
10K
100K
R11
22K
R13
220K
C5
470pF
D2
1N4148
R83
NOTE 4
C2
47/35V
D3
1N4148
D13
1N4148
R31
4.7K
R32
1.5K/1%
R33
22K
R30
C13
10/35V
47K
C6 30pF
SIP1B
10K/0.2%
-
6
7
+
5
IC1B
NE5532AN
VCC-
R17 4.7K
84
1
+-IC2A
RC4559
SERVO/HIGH PASS CURRENT LIMITER
R18
2.2K
3
2
R14
10K/1%
84
+
-
0.001/50V
1
IC1A
NE5532AN
R15
10K/1%
2.2/5%/100V
R19
10K
C10
549/1%
-
8
14
+
SELECTED
R38
10K
SELECTED
1
9
R39
VCC-
VCC
R40
-
6
+
7
IC3C
LM339N
C8
R20
IC3B
LM339N
R27
2.2K
D21
NOTE 4
1N4148
D20
VCC+
R29
2.2K
312
5
+
2
4
IC3A
-
LM339N
R28
10K
R81
10K
1N4148
2.2K
R49
R50
10K
13
IC3D
LM339N
D12
ATTENUATOR DRIVER
Q2
R5
4.7K
VCC+
C9
R6
10K
TURN ON DELAY
D5
1N4148
D6
1N4148
C4
30pF
BALANCED INPUT/GAIN
2.2/5%/100V
D9
1N4148
R24
680K
5
+
6
-
RC4559
R25
680K
C1
100/35V
D7
1N4148
C7
0.1/50V
VCC+
2
3
VCC-
VCC+
R26
1K
7
IC2B
VCC- VCC-
D1
1N4148
R1
15K
R2
330K
D D
VCC-
13
12
11
10
9
8
7
6
5
4
3
2
1
J2-M
26-48-1135
C3 0.1/50V
SIP1A
10K/0.2%
SIP1C
Q1
2N5401
R4
22K
R3
2N5551
10K
D4
1N4148
10K/0.2%
SIP1D
10K/0.2%
C C
R16
150K
SPEAKER
SIGNAL
CLIP
CONTROL
SPEAKER
LIMIT
MUTE
B B
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
J3-M
26-48-1155
R21
100K
R82
NOTE 4
VR1
NOTE 4
D8
1N4148
C11
1/50V
R22 10K
D10 1N4148
D11 1N4148
R23 10K
C12 1/50V
SIGNAL DETECTOR CLIP DETECTOR AMPLIFIER FRONT END/IC POWER SUPPLY
R34
499/1%
1
2
3
4
5
6
7
8 9
NE5517AN
VCC-
ATTENUATION/MUTE
R41
1K/0.1%
R42
1K/0.1%
VCC+
11
+
10
-
R51
1M
R52
100K
IC4
R43
1K/0.1%
R44
1K/0.1%
2N5551
Q4
16
15
14
13
12
11
10
R45 100K/0.1%
R46 100K/0.1%
R47
100K/0.1%
R48
100K/0.1%
R53
100K
R54
1M
VCC-
2N5401
Q5
R35
750/1%
VCC+
R36
Z1 1N5353
C14 470uF
3.3K
C16 470uF
0.47/250V
R37
47K
Z3 1N5938
R55
2.2K
D14
1N4148
D15
1N4148
Z4 1N5938
0.47/250V
C17 470uF
C15 470uF
Z2 1N5353
R56
2.2K
C18
0.1uF
R57
100
R58
100
C20
C21
0.1uF
C19
2N5401
VCC+
R65
NOTE 3
R59
511/1%
2N5551
R69
NOTE 1
Q14
2N5551
Q10
Q6
2N5551
R73
0
R74
R76
NOTE 2
R78
2.7K
R79
11K/1%/1W
R80
549/1%
R77
NOTE 2
47
D18
SF14
C22
09-52-3172
J1-F
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
30pF
D19
SF14
R75
D16
1N4148
D17
1N4148
Q8
2N5551
R61
68.1/1%
R63
8.25K/1%
R62
68.1/1%
Q9
2N5401
2N5551
Q12
R67
68.1/1%
R64
8.25K/1%
R68
68.1/1%
2N5401
Q13
R71
100
R72
100
47
Q11
R70
NOTE 1
2N5401
Q15
2N5401
Q7
R60
511/1%
R66
NOTE 3
VCC-
NOTE 1: 8.2K 2W ON MODELS 8001, 7001, CV601
6.8K 2W ON MODELS 6001, 4801
4.3K 2W ON MODEL 4601
5.6K 2W ON MODELS CC301/300
3.3K 2W ON MODELS CV301, CC151, 3301
A A
NOTE 2: 27K 2W ON MODELS 8001, 7001, CV601
20K 2W ON MODELS 6001, 4801, CC301
16K 2W ON MODEL 4601
15K 2W ON MODELS CV301, CC151, 3301
8
7
NOTE 3: 750 10W ON MODELS 8001, CV601
680 10W ON MODEL 7001
620 10W ON MODEL 6001
560 10W ON MODELS 4801, MA5850
1.1K 10W ON MODEL 4601
560 10W ON MODELS CC301
1K 10W ON MODELS CV301, 3301
360 10W ON MODEL CC151
NOTE 4: R82, R83, D20, VR1 ARE USED ON MODEL MA5850 ONLY
PRIOR TO 6-2-92 R65, R66 WERE 1K/10W ON MODEL CC151 NOTE 5:
6
1.1K 10W ON MODEL 4601
560 10W ON MODELS CC301
1K 10W ON MODELS CV301, CC151, 3301
NOTE 4: R82, R83, D20, VR1 ARE USED ON MODEL MA5850 ONLY
5
REV NOTES 7/15/93
(1) DELETE R12
CREST AUDIO INC.
150 Florence Ave.
Hawthorne, NJ 07506
Title
PRO-LINE PREAMP/FRONT END
Size Document Number Rev
21C1124-02 02
C
4
3
Date: Sheet of
2
1 0Friday, May 19, 2000
1
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