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8 7 6 5 4 3 2 1
D3 VCC+ R15
1N4148
R6 4.7K
R1 Q1
Q3 22K 2N5551 VCC+
2N5401 D4 D21
15K
R2
R3 Q4 1N4148 1N4148 Z1 1N5353
D 2N5551 D
C2
330K 10K 100uF 35V
R4 C17 470uF
4.7K R65
R20
C14 470uF NOTE 3
VCC-
10K
C22
TURN ON DELAY/MUTE
0.47uF 250V R70 R69
C19 511 1% NOTE 1
R17 0.1uF
2 1 OC1 Q13
13 2N5551
12 100K 1%
11
4 6
10 VCC+ Z4 1N5938
9 C5 C4 Q6
8 Q5 2N5551
5
7 30pF 2N5551
6 CLM5010
0.1uF D9 R83
5 1N4148
4 R9 B R16 200K 1%
R9 A
3 47
2 10K 0.2% Q7
1 D5 D6 2N5551 2N5551
Q8
10K 0.2% 6 - R55
J2-M 1N4148 1N4148 7 D24
R9 C VCC- SELECTED VCC-
5 +
4
IC1 B
R54 R72 R73
LF353N 2 - - 6 SF14
D8 68.1 1% 68.1 1%
10K 0.2% 1 7
1N4148 100K 0.1%
3 + + 5 R87
IC1 A IC4 B R71
100 R74 NOTE 2
R9 D C3 LF353N LM393N
R10 100
8
20K 1% 10K 0.2% 30pF C27
VCC+ R57 R75
R58 R56 R89
C VCC- C
C6 1K 0.1% 1K 0.1% 100K 0.1% 8.25K 1%
0.1uF 2.7K 17
30pF 16
15
14
D22 R85 13
BALANCED INPUT/GAIN
12
1N4148 11K 1% 1W 11
10
9
R86 8
D23 7
549 1% 6
1N4148 5
C8 2.2uF 5% R26 4.7K
C9 4
R61 R60 R59 R76 3
2.2uF 5% R77
1K 0.1% 1K 0.1% 100K 0.1% 8.25K 1% 2
VCC- 100
R88 1
4
R25 VCC- R80
4
R27 R28 NOTE 2
2 -
100 J1-F
1 - 2
150K
3 + 1
D10 D11 IC2 A 10K 549 1% + 3 D25
1N4148 1N4148 R78 R79
RC4559N R45 IC4 A
15 2.2K R63 100K 0.1% 68.1 1% 68.1 1%
8
LM393N
14 VCC+
8
R62 SF14
13 C11 VCC+
12 SELECTED Q9
11 2N5401 2N5401
Q10
10 R84
9 0.001uF
8 SERVO/HIGH PASS CURRENT LIMITER 47
7
6
5 2N5401 Q12
4 2N5401
3 Q11
2 VCC+
1 R52
R24 1K
J3-M Z6 1N5938 Q14
B 2N5401 B
1K R47 C23
1M
C12 0.1uF R82 R81
D28
- 6 511 1% NOTE 1
VCC+ 7
1/50V 1N4148 C26
R7 + 5 D27 D26 R46
R35 IC3 B 1N4148 1N4148
R18 220K 100K 0.47uF 250V
VCC+ RC4559N
680K 4.7K R66
R34 10K
R19
R21 C15 470uF
8
D12 1N4148 1K VCC+ NOTE 3
10K R23 Q15
3 D7 2N5551
+ 1N4148
5 1
R33 100K + 10K
7 2 C18 470uF
- IC3 A
6 R50
- IC2 B RC4559N R90 2.2K
VCC-
4
RC4559N
D13 1N4148 R22 4.7K
180K Z2 1N5353
VCC-
CLIP DETECTOR AMPLIFIER FRONT END/IC POWER SUPPLY
R31 10K
C13 R32
1/50V 680K
NOTE 1: 8.2K 2W ON MODELS 8001, 7001, CV601/600
VCC-
SIGNAL DETECTOR LIMIT DETECTOR 6.8K 2W ON MODELS 6001, 4801
5.6K 2W ON MODELS CC301/300
3.3K 2W ON MODELS CV301/300, CC151/150
NOTE 2: 27K 2W ON MODELS 8001, 7001, CC601/600
20K 2W ON MODELS 6001, 4801, CC301/300
A A
15K 2W ON MODELS CV301/300, CC151/150
NOTE 3: 1K 10W ON MODELS CC151/150, CV301/300
820 10W ON ALL OTHER MODELS
CREST AUDIO
150 Florence Ave.
Hawthorne, NJ 07506
Title
PREAMP/FRONT END
Size Document Number Rev
C 2123001
Date: Wednesday, May 17, 2000 Sheet 1 of 0
8 7 6 5 4 3 2 1
8 7 6 5 4 3 2 1
C3
R6
R1 1.78K/1%
100K 10/25V
26-48-1035
3
STEP 4 J2 +20V
IC2B 13
5 R13 R17
NJM5532M + 1 A/OUTPUT 12
5 2
+ R7 2 A/IGM 11
D 7 4 D
- IC5A 2.7K OPTO1A 15K 3 A/CLIP 10
6 D3 9
- 2.2K LM339D PC3Q17 A/PROTECT
12
DL103A B/OUTPUT 8
D1
R2 R8 B/IGM 7
549/1% R18 B/CLIP 6
150K STEP 3 7.5K B/PROTECT 5
1N4148 4
7 A/TEMP
+ R14 B/TEMP 3
D2 1
R3 +24V 2
6 OPTO1B 1
- 2.7K
10K R9 IC5B PC3Q17
1N4148 243/1% LM339D R19 J2
R4 09-48-2131
STEP 2
9 1.8K
10K D4 + R15
14 ANALOG GND
DL103A D7 1
8 OPTO1C ANALOG GND
- IC5C 2.7K 2
R10 PC3Q17 1N4004 3
8
121/1% LM339D A/+16V
R20 4
2 B/+16V
- STEP 1 D8 A/-16V 5
1
0.1/50V 2K/1% B/-16V 6
3 11 R16 1N4004
+ + 7
C2 13
IC2A
NJM5532M 10 OPTO1D J3
- 2.7K D9
4
IC5D 26-48-1075
C PC3Q17 DATA & POWER CONN. C
C1 LM339D 1N4004
C4 R11 R12
.22/50V 10/1% 330K
0.1/50V D10
1
1N4004 2
C5 3
C4 4
0.1/50V 0.1/50V
5
6
7
8
9
10
J1
09-48-2101
VR JUMPER
B B
CHANNEL B SAME AS ABOVE
A A
CREST AUDIO
100 EISENHOWER DRIVE
PARAMUS, NJ 07652