Crest pro4801 schematic
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
200K 1%
-
+
LF353N
8 4
OC1
5
CLM5010
VCC-
-
6
1
IC1 A
VCC+
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
1
2
3
4
5
D D
6
7
8
J3
OCTAL
21
PIN 3 HOT (+)
A
3
J1
NC3FD
J5
13
12
A2
A-
A3
C C
A+
A1
BB+
11
10
9
8
7
6
5
4
3
2
1
1
B B
2
3
4
5
6
B-
B2
A2
A3
MSSA2350
B+
STEREO
BRIDGE
PIN 3 HOT (+)
B
21
7
8
J4
OCTAL
3
J2
NC3FD
A2
A3 PARALLEL
B3
SW1
CREST AUDIO
A A
HAWTHORNE, NJ 07506
Title
6001/4801/3301 INPUT PCB
Size Document Number Rev
A
Date: Sheet of
8
7
6
5
4
21A1006
3
2
1
1 0Wednesday, May 17, 2000
8
7
6
5
4
3
2
1
CENTER TAP
D1
1N4004
D D
34 V. AC
F1
3A/MINI
34 V. AC
26-48-1155
M5
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
44 V. OUT
SIGNAL CH. A
CLIP CH. A
CONTROL V. CH. A
LIMIT CH. A
C C
SPKR. RAIL CH. A
MUTE CH. A
TEMP SENSOR +
TEMP SENSOR OUT
TEMP SENSOR GND
GROUND
GROUND
GROUND
TRANSFORMER TEMP
TRANSFORMER TEMP
RS202
D3
1N4148
R42
33/2W/5%
C9
470/25V
C6
470/50V
LED 3
SIGNAL
R7
100K
BR1
R3
10K
R5
2.7K
Q1
2N5551
2N5551
D5
1N4148D71N4148
C1
1/50V
D9
1N4148
R11
5K/5W
TR1
R13
10K
MAC97A
C8
100/25V
470/6.3V
R9
2.7K
R40
SELECTED
Q3
LED 1
CLIP
C3
Z1
1N5927
D11
1N4148
26-48-1136
C5
0.1/100V
M12
12345678910111213
1N5927
R41
SELECTED
R12
5K/5W
TR2
MAC97A
C2
1/50V
2N5551
2.7K
R6
R4
D6
1N4148
10K
D4
1N4148
D2
1N4148
26-48-1155
M6
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
27 V. IN
SIGNAL CH. B
CLIP CH. B
CONTROL V. CH. B
LIMIT CH. B
SPKR. RAIL CH. B
MUTE CH. B
TEMP SENSOR +
TEMP SENSOR OUT
TEMP SENSOR GND.
GROUND
RELAY GROUND
RELAY GROUND
RELAY 1,3
RELAY 2,4
Q2
R14
10K
R8
100K
LED 4
SIGNAL
D8
1N4148
LED 2
CLIP
R10
2.7K
2N5551
Q4
C4
470/6.3V
Z2
C7
100/25V
D10
1N4148
R19
5.1K
1N4148
D17
1N4148
D15
-
2
+
3
4 13
R29
10K
4.7K
LED 5
TEMP/DC
R17
2.7K
1
IC1A
LM614
R38
R25
100K
D13
1N4148
B B
LED 7
ACTIVE
R15
2.7K
MPSA75
Q5
R27
390
R21
1K
7
IC1B
LM614
R23
750/1%
8
D19
1N4148
-
6
+
5
13
IC1E
LM614
9
R31
390K
499/1%
R33
4.7K
R35
R36
499/1%
R37
2.2K
R34
4.7K
R24
750/1%
D18
1N4148
R32
390K
R22
1K
IC1D
LM614
D14
16
1N4148
D16
1N4148
-
15
+
14
M9
53.6K 1/4W/1%
60.4K 1/4W/1%
73.2K 1/4W/1%
123456789
M7
3
2
1
26-48-1035
A A
VR1
5KB
10
26-48-1102
R40, R41 RESISTOR VALUES
MODEL VALUE
3301 41.2K 1/4W/1%
4601
4801
6001
7001 84.5K 1/4W/1%
R20
5.1K
12
11
R39 100K
R30
10K
LED 6
TEMP/DC
R18
2.7K
+
10
-
IC1C
LM614
R26
4.7K
R28
390
LED 8
ACTIVE
R16
2.7K
Q6
MPSA75
D12
1N4148
M8
3
26-48-1035
2
1
VR2
5KB
CREST AUDIO INC.
150 Florence Ave.
Hawthorne, NJ 07506
Title
7-6-48-46-3301 DISPLAY W/NEXSYS CONTROL
Size Document Number Rev
21C1095
C
8
7
6
5
4
3
Date: Sheet of
2
1 0Wednesday, May 17, 2000
1
02
8
7
6
5
4
3
2
1
34 V. AC
34 V. AC
D D
26-48-1155
M5
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
44 V. OUT
SIGNAL CH. A
CLIP CH. A
CONTROL V. CH. A
LIMIT CH. A
SPKR. RAIL CH. A
MUTE CH. A
TEMP SENSOR +
TEMP SENSOR OUT
TEMP SENSOR GND
GROUND
GROUND
GROUND
TRANSFORMER TEMP
TRANSFORMER TEMP
C C
3A/MINI
1N4148
F1
BR1
RS202
R3
10K
D3
1N4148
D13
LED 7
ACTIVE
D5
1N4148D71N4148
TEMP/DC
R15
2.7K
MPSA75
Q5
LED 5
4.7K
C6
470/50V
LED 3
SIGNAL
470/6.3V
C3
R7
100K
D9
1N4148
4.7K
R5
2.7K
Q1
2N5551
C1
1/50V
R11
5K/5W
TR1
R13
MAC97A
D11
1N4148
R19
7.5K
R17
2.7K
1N4148
1N4148
D15
D17
-
2
1
+
IC1A
LM614
R25
100K
R27
390
3
4 13
R38
R29
10K
7
IC1 B
LM614
R9
2.7K
Q3
2N5551
R21
1K
-
6
+
5
390K
Z1
1N5927
LED 1
CLIP
C5
0.1/100V
LED 2
CLIP
1N5927
R10
2.7K
2N5551
Q4
Z2
470/6.3V
D10
R8
100K
LED 4
SIGNAL
D8
1N4148
C2
1/50V
C4
TR2
MAC97A
2N5551
R12
5K/5W
R6
2.7K
R4
D4
1N4148
10K
D2
1N4148
M6
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
26-48-1155
27 V. IN
SIGNAL CH. B
CLIP CH. B
CONTROL V. CH. B
LIMIT CH. B
SPKR. RAIL CH. B
MUTE CH. B
TEMP SENSOR +
TEMP SENSOR OUT
TEMP SENSOR GND.
GROUND
RELAY GROUND
RELAY GROUND
RELAY 1,3
RELAY 2,4
Q2
D6
1N4148
R14
4.7K
1N4148
* *
R23
750/1%
D19
1N4148
R31
R35
499/1%
R33
4.7K
R24
750/1%
8
13
IC1 E
LM614
1N4148
D18
9
R34
4.7K
R32
390K
R36
499/1%
R37
2.2K
R22
1K
LM614
IC1D
D14
16
1N4148
D16
1N4148
-
15
+
14
R20
7.5K
12
+
11
- IC1C
R39 100K
R30
10K
LM614
LED 6
TEMP/DC
R18
2.7K
LED 8
ACTIVE
R16
2.7K
D12
1N4148
10
R26
4.7K
Q6
R28
390
MPSA75
B B
26-48-1035
M7
1
2
3
VR1
5KB
VR2
5KB
26-48-1035
M8
1
2
3
* NOTE
ON 7001 R23, R24 WILL CHANGE TO 1K/1% WITH UL APPROVAL
A A
CREST AUDIO INC.
150 Florence Ave.
Hawthorne, NJ 07506
Title
7001/6001/4801 DISPLAY
Size Document Number Rev
21C0948
C
8
7
6
5
4
3
Date: Sheet of
2
1 0Wednesday, May 17, 2000
1
8
17 V. AC
R54
33R/5W
34 V. AC
D D
34 V. AC
F1
1N4004
7
6
5
M12
26-48-1136
4
12345678910111213
3
2
1
D1
C9
470/16V
R40
NOTE 1:
NOTE 1:
R41
3A/MINI
BR1
RS202
C6
470/50V
1N5913B
R46
Z3
R50
2.2K
84
3
+
2
- IC2A
LM393M
R3
NOTE 2:
10K
10K/1W
C10
2.2/100V
R47
44 V. OUT
SIGNAL CH. A
CLIP CH. A
CONTROL V. CH. A
LIMIT CH. A
C C
SPKR. RAIL CH. A
MUTE CH. A
TEMP SENSOR +
TEMP SENSOR OUT
TEMP SENSOR GND
GROUND
GROUND
GROUND
TRANSFORMER TEMP
TRANSFORMER TEMP
M5
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
26-48-1155
2.2K/1W
D3
1N4148
R42
10K
1
D5
1N4148D71N4148
470/6.3V
D10
1N4148
R8
100K
2.7K
R6
PMBT5551
Q2
LED 4
SIGNAL
D8
1N4148
C4
C2
1/50V
R12
5K/5W
TR2
MAC97A
C7
R14
10K
R43
10K
IC2B
LM393M
7
D6
1N4148
+
-
5
6
D4
1N4148
2.2K
Z4
R53
1N5913A
R48
10K/1W
C11
2.2/100V
NOTE 2:
D2
1N4148
R4
10K
2.2K/1W
R49
M6
27 V. IN
1
SIGNAL CH. B
2
CLIP CH. B
3
CONTROL V. CH. B
4
LIMIT CH. B
5
SPKR. RAIL CH. B
6
MUTE CH. B
7
TEMP SENSOR +
8
TEMP SENSOR OUT
9
TEMP SENSOR GND.
10
GROUND
11
RELAY GROUND
12
RELAY GROUND
13
RELAY 1,3
14
RELAY 2,4
15
26-48-1155
100/25V
R5
2.7K
Q1
PMBT5551
5K/5W
R13
10K
MAC97A
R7
100K
LED 3
SIGNAL
PMBT5551
C8
100/25V
470/6.3V
D9
1N4148
C3
C1
1/50V
R11
TR1
R9
2.7K
Q3
LED 1
CLIP
R45
45.3/1%
499/1%
R44
Z1
1N5927
VR3
250
0.1/100V
NOTE 3
1N5927
C5
R10
2.7K
PMBT5551
LED 2
Q4
CLIP
R52
Z2
D11
1N4148
R20
5.1K
14
15
R39 100K
R30
10K
3
+
-
IC1D
LM614M
LED 6
TEMP/DC
R18
2.7K
LED 8
ACTIVE
R16
2.7K
D12
1N4148
16
R26
4.7K
Q6
R28
390
MPSA75
M8
3
26-48-1035
2
1
VR2
5KB
CREST AUDIO INC.
150 Florence Ave.
Hawthorne, NJ 07506
Title
MA5850 DISPLAY WITH NEXUS CONTROL
Size Document Number Rev
21C1229
C
Date: Sheet of
2
1 0Friday, May 19, 2000
1
02
R32
390K
R22
1K
IC1C
D14
10
1N4148
D16
1N4148
-
11
+
12
LM614M
7
IC1B
LM614M
R21
1K
R23
750/1%
8
LM614M
R35
IC1E
13
9
R36
499/1%
R37
2.2K
D19
1N4148
-
6
+
5
R31
390K
499/1%
R33
4.7K
D13
1N4148
LED 7
ACTIVE
R15
2.7K
LED 5
TEMP/DC
R17
2.7K
1
IC1A
LM614M
B B
4.7K
R38
R25
100K
MPSA75
Q5
R27
390
R19
5.1K
1N4148
D17
1N4148
D15
-
2
+
3
4 13
R29
10K
4.7K
R24
750/1%
D18
1N4148
R34
M9
60.4K 1/4W/1%
73.2K 1/4W/1%
123456789
M7
3
2
1
26-48-1035
A A
VR1
5KB
NOTE 1:
NOTE 2: R3, R4 NOT INSTALLED
10
26-48-1102
R40, R41 RESISTOR VALUES
MODEL VALUE
4801
6001
7001 84.5K 1/4W/1%
RESERVED FOR FUTURE USE
NOTE 3: R52 USED FOR FIXED SIGNAL PRESENSE THRESHOLD
8
7
6
5
4
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