Crest 4801 set-MA5850 User Manual

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

+

-

D4
1N4148

Z4

5

R53

6

2.2K

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

R21

IC1B
LM614M

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

R34

4.7K

R24
750/1%

D18

1N4148

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