Crest Audio P-2500 Schematic
8
7
6
5
4
3
2
1
23
D D
PRIOR TO 6-3-92 R14/R15 WERE 680/10W ON MODEL 6001
R1
LM317T
IC3
R17
1
221/1%
D5
1N4004
390/2W
D1
1N4148C3
10/50V
R6
2.2K
C C
NOTE C1 IS NOT CORRECT ON PCB. MUST FIX NEXT REV
R5
2.2K
Z1
1N5363A
Q1
MPSA13
IC2B
LM393N
7
DELETE THIS NOTE WHEN BOARD IS REVED!!
5
+
6
-
R8
1K
R11
1K/1%
84
2
-
3
+
1
IC2A
LM393N
D2
1N4148
R4
100K
D3
1N4148
R10
39.2K/1%
R12
1K/1%
R7
1K
R9
39.2K/1%
D4
1N4004
R3
2.2K
IC1
1
LM317T
221/1%
23
R2
R16
4.7K
C1
0.1/100V
R15
NOTE 1
15
14
13
12
11
10
9
8
7
6
5
4
3
2
B B
1
M1
26-48-1155
R14
NOTE 1
NOTE 1:
680/10W ON 7001
CREST AUDIO INC.
620/10W ON 6001
A A
1K/10W ON 3301
150 Florence Ave.
Hawthorne, NJ 07506
1.1K/10W ON 4601
Title
7001/6001/4601/3301 FAN DRIVER
Size Document Number Rev
21A0952
A
8
7
6
5
4
3
2
Date: Sheet of
1 1Wednesday, May 17, 2000
1
8
7
6
5
4
3
2
1
D3
R3
330K
1N4148
Q3
2N5401
R1
15K
D D
VCC-
13
12
11
10
J2-M
9
8
7
6
5
4
3
2
1
10K 0.2%
R9 A
R9 C
0.1uF
C5
D5
1N4148
10K 0.2%
R10
C C
20K 1%
R9 D
10K 0.2%
C8 2.2uF 5%
R25
150K
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
J3-M
B B
D10
1N4148
C12
1/50V
R34 10K
D12 1N4148
R33 100K
D13 1N4148
R31 10K
C13
1/50V
SIGNAL DETECTOR LIMIT DETECTOR
VCC+
R6
22K
R2
10K
Q4
2N5551
R4
4.7K
C2
100uF 35V
D4
1N4148
R20
Q1
2N5551
R15
4.7K
D21
1N4148
10K
TURN ON DELAY/MUTE
VCC+
D9
1N4148
D6
1N4148
C3
30pF
6
5
D8
1N4148
C6
0.1uF
10K 0.2%
-
+
LF353N
R17
100K 1%
C4
30pF
R9 B
IC1 B
7
VCC-
R16
2
3
2 1
4 6
5
200K 1%
-
+
IC1 A
LF353N
8 4
VCC-
VCC+
OC1
CLM5010
-
6
1
IC4 B
LM393N
7
+
5
BALANCED INPUT/GAIN
R26 4.7K
VCC-
-
2
1
+
D11
1N4148
3
IC2 A
RC4559N
8 4
VCC+
R45
2.2K
SERVO/HIGH PASS CURRENT LIMITER
C9
2.2uF 5%
R27
10K
R28
549 1%
IC4 A
LM393N
1
C11
VCC-
-
2
+
3
8 4
VCC+
0.001uF
R24
R52
1K
1K
VCC+
R35
680K
R19
1K
5
+
7
6
-
IC2 B
RC4559N
R18
4.7K
R21
10K
R22
180K
R7
220K
D28
1N4148
VCC+
R23
10K
84
3
+
1
2
-
IC3 A
RC4559N
VCC-
7
IC3 B
RC4559N
VCC+
D7
1N4148
R32
680K
VCC-
NOTE 1: 8.2K 2W ON MODELS 8001, 7001, CV601/600
6.8K 2W ON MODELS 6001, 4801
VCC+
Z1 1N5353
C17 470uF
R65
C14 470uF
NOTE 3
C22
0.47uF 250V
R70
C19
511 1%
R69
NOTE 1
0.1uF
R55
SELECTED
R54
100K 0.1%
R58
1K 0.1%
R57
1K 0.1%
VCC-
R56
100K 0.1%
Z4 1N5938
Q5
2N5551
Q7
2N5551
R72
68.1 1%
R71
100
R75
8.25K 1%
Q6
2N5551
2N5551
Q8
R73
68.1 1%
R74
100
D22
1N4148
D23
2N5401
C23
0.1uF
C26
1N4148
R77
100
R78
68.1 1%
Q9
2N5401
Q11
R82
511 1%
R76
8.25K 1%
R79
68.1 1%
2N5401
Q10
Q12
2N5401
R81
NOTE 1
R80
100
R66
NOTE 3
VCC-
R90
4.7K
R61
1K 0.1%
R63 100K 0.1%
R62
SELECTED
-
6
+
5
D27
1N4148
R60
1K 0.1%
D26
1N4148
R59
100K 0.1%
VCC+
R47
1M
R46
100K
Q15
2N5551
R50
2.2K
Z6 1N5938
0.47uF 250V
C15 470uF
C18 470uF
Z2 1N5353
CLIP DETECTOR AMPLIFIER FRONT END/IC POWER SUPPLY
Q13
2N5551
D24
SF14
R87
NOTE 2
R89
2.7K
R85
11K 1% 1W
R86
549 1%
R88
NOTE 2
D25
SF14
Q14
2N5401
R83
47
C27
30pF
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
J1-F
R84
47
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
A A
20K 2W ON MODELS 6001, 4801, CC301/300
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
2123001
C
8
7
6
5
4
3
Date: Sheet of
2
1 0Wednesday, May 17, 2000
1
8
7
6
5
4
3
2
1
R8
10K
R7
10K
R13
220K
C6 30pF
SIP1B
10K/0.2%
-
6
+
5
VCC+
C5
470pF
IC1B
NE5532AN
R9
1K
(NEW)
2N5401
Q3
R11
22K
100K
C2
D2
1N4148
47/35V
D3
1N4148
D13
R10
1N4148
R31
4.7K
R32
1.5K/1%
R33
22K
R30
C13
10/35V
47K
84
3
+
1
7
VCC-
2
R14
10K/1%
-
IC1A
NE5532AN
R15
10K/1%
2.2/5%/100V
2N5401
Q9
C8
Q2
R5
4.7K
VCC+
R6
10K
C1
100/35V
TURN ON DELAY
D5
1N4148
D6
1N4148
C4
30pF
BALANCED INPUT/GAIN
D7
1N4148
C7
0.1/50V
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
2N5551
C9
2.2/5%/100V
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
D9
1N4148
R24
680K
5
+
6
-
R25
680K
C12 1/50V
VCC+
2
3
VCC-
VCC+
R26
1K
7
IC2B
RC4559
VCC- VCC-
SIGNAL DETECTOR CLIP DETECTOR AMPLIFIER FRONT END/IC POWER SUPPLY
R17
4.7K
84
1
+-IC2A
RC4559
SERVO/HIGH PASS I.G.M. DETECTOR
R18
2.2K
R19
10K
C10
0.001/50V
576/1%
(NEW)
R20
R27
2.2K
D21
NOTE 4
1N4148
D20
VCC+
R29
2.7K
84
(NEW)
3
+
1
2
-
1C3A
LM393
R28
10K
R81
10K
D12
1N4148
2.2K
ATTENUATOR DRIVER
Q8
R49
VCC-
ATTENUATION/MUTE
R39
100K
R38
47K
VCC-
R50
10K
7
IC3B
LM393
R34
499/1%
1
2
3
4
5
6
7
8 9
IC4
NE5517AN
R40
47K
R41
100K
VCC+
5
+
6
-
2N5551
R51
1M
R52
100K
2N5551
Q4
16
15
14
13
12
11
10
1nF
R42
100K
Q12
C23
VCC-
R53
100K
R54
1M
2N5401
Q5
R37
47K
R35
750/1%
2.7K
(NEW)
Z5
SELECT
D23
1N4004
R44
SELECT
D22
1N4004
Z6
SELECT
R36
SELECT
100/1%
100/1%
SELECT
R55
2.2K
D14
1N4148
D15
1N4148
R56
2.2K
VCC+
Z1 1N5353
C14 470uF
C16 470uF
0.47/250V
Z3 1N5938
R47
R45
R43
R46
Z4 1N5938
0.47/250V
C17 470uF
C15 470uF
Z2 1N5353
C18
R57
100
R58
100
C20
0.1uF
C21
0.1uF
C19
2N5401
VCC+
R65
NOTE 3
2N5551
Q6
R69
NOTE 1
Q10
2N5551
Q14
2N5551
R59
511/1%
R74
R76
NOTE 2
R78
2.7K
R79
11K/1%/1W
R80
576/1%
(NEW)
R77
NOTE 2
R75
D18
SF14
D19
SF14
47
C22
09-52-3172
J1-F
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
30pF
D16
1N4148
D17
1N4148
Q1A
MPQ6700
R61
68.1/1%
R63
8.25K/1%
R62
68.1/1%
Q1C
MPQ6700
MPQ6700
MPQ6700
Q1B
R67
68.1/1%
R71
R64
8.25K/1%
R68
68.1/1%
100
R72
100
Q1D
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, 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 1Wednesday, May 17, 2000
1
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