Symetrix 425, 2A00 Schematic

D

C

B

A

-15VA

+15VA

654321

JP2

1

0 OHM

D6
1N4148

D5
1N4148

R8
10K

R1
1M

2

R7
120 OHM

1

2

R2
2K67

R3
3K01

R4
4K22

R5
4K22

R6
35K7

Q1
2N4403

3

9

+

8

-

11

+

10

-

5

+

4

-

7

+

6

-

EXPLEDS_CH1

U1D

14

LM339

U1C

13

LM339

U1B

2

LM339

U1A

1

LM339

-15VA

CH1 EXPANDER LEDS

1

JP1
0 OHM

2

D4

D3

D2

D1

+15VA

R20

10K

-2dB

(RED)

-6dB

(RED)

-12dB

(RED)

-18dB

(RED)

+15VA

D16
1N4148

D15
1N4148

R14
10K5

R15
6K49

R16
5K76

R17
5K62

R9
5K62

R10
5K62

R11
8K45

R18
28K0

R12
124K

R19
120 OHM

1

2

11

10

11

10

R13
1M

Q2
2N4403

3

1

2

D12

1

0 OHM

D10

-15VA

JP10
0 OHM

D14

-2dB

(RED)

D13

-4dB

(RED)

-6dB

(RED)

JP6

-10dB

(RED)

-12dB

D9

(RED)

-15dB

D8

(RED)

D7

-25dB

(RED)

-8dB

D11

2

(RED)

LIMLEDS_CH1

U3D

9

+

8

-

+

-

5

+

4

-

7

+

6

-

9

+

8

-

+

-

5

+

4

-

7

+

6

-

14

LM339

U3C

13

LM339

U3B

2

LM339

U3A

1

LM339

U2D

14

LM339

U2C

13

LM339

U2B

2

LM339

U2A

1

LM339

CH1 COMPRESSOR LEDS

JP15

1

0 OHM

D18
1N4148

D17
1N4148

R28
10K

-15VA

+15VA

COMPLEDS_CH1

2

R27
120 OHM

1

3

Q3
2N4403

9

+

8

-

11

+

10

-

5

+

4

-

7

+

6

-

R21
1M

U4D

14

LM339

U4C

13

LM339

U4B

2

LM339

U4A

1

LM339

-15VA

2

R22
8K45

R23
5K90

R24
5K49

R25
5K76

R26
100K0

CH1 LIMITER LEDS

DRAWN:

RELEASED:

1

2

D22

D21

D20

D19

JP16
0 OHM

-3dB

(RED)

-6dB

(RED)

-9dB

(RED)

-12dB

(RED)

DETECT_CH1

DATED:

DATED:

C3

.01uF/25V

R32
10K

-15VA

+15VA

D24
1N4148

D23
1N4148

2

R29
549 OHM

R30
1K21

R33
3K83

R34
12K1

R35
30K1

JP19

1

0 OHM

COMPANY:

TITLE:

DRAWING NO:

REVISION RECORD

REVISIONS DONE OR ECO NUMBER:

VALUE CHANGES IN OUTPUT LED STRING

CHANGES AS PER ECO 425-001
ECO 425-8 SWAPPING LED REF DES.

D40-D43 & D60-D63

CORRECTED P/N AND DWG ERRORS,
CHG’D REV TO CONFORM TO NEW CONVENTION.

-20

LIMLEDS_CH1

(GREEN)

+15VA

-10

(GREEN)

0VU

(GREEN)

CLIP

(RED)

R31
120 OHM

1

Q4
2N4403

3

10

DETECT_CH1

2

8

11

5
4

7

LTR

B

C C4 & C5 ADDED AS PER ECO 169 2/13/92

E

A0

U5D

9

+

-

+

-

+

-

+

6

-

LM339

U5C

LM339

U5B

LM339

U5A

LM339

14

D25

13

D26

2

D27

1

D28

-15VA

CH1 OUTPUT LEDS

SYMETRIX INC.

14926 35th Ave. W.

Lynnwood, WA 98037

425 LED DAUGHTERBOARD

023425

FROM MOTHERBOARD

JP14

1

0 OHM

EXPLEDS_CH1

COMPLEDS_CH1

JP13

1

0 OHM

O/PLEDS_CH1

STEREO

D33

(RED)

DUAL

D32

(RED)

SHEET:

2

2

JP20

1

0 OHM

1

1

2

3

4

5

6

2

8

REV:

OF

12/19/91

J1A

J1B

J1C

J1D

J1E

J1F

DATE:

7/9/92D

8/24/93

B.G.

3/20/95

7

J1G

J1H

A0

4

D

C

B

A

D

C

B

A

JP32

1

0 OHM

D39
1N4148

D38
1N4148

R42
10K

D31
1N4148

654321

2

R41
120 OHM

2

R40
3K01

R43
4K22

R44
4K22

R45
35K7

+15VA

1

3

R39
2K67

Q5
2N4403

9

+

8

-

11

+

10

-

5

+

4

-

7

+

6

-

R38
1M

U7D

LM339

U7C

LM339

U7B

LM339

U7A

LM339

EXPLEDS_CH2

D48

1N4148

14

13

2

1

-15VA

CH2 EXPANDER LEDS

LEDBUSS

LEDBUSS

1

JP31
0 OHM

2

D37

(RED)

D36

(RED)

D35

(RED)

D34

(RED)

+15VA

R57

20K0

-2dB

-6dB

-12dB

JP38

1

0 OHM

-18dB

+15VA

COMPLEDS_2

R51
10K5

R52
6K49

R53
5K76

R54
5K62

2

R47
5K62

R48
5K62

R49
8K45

R55
28K0

R46
124K

D50
1N4148

D49
1N4148

2

9
8

11

10

5
4

7

2

6

0 OHM
JP37

9

1

8

11

10

5
4

7
6

R56
120 OHM

LEDBUSS

1N4148

JP43

1

0 OHM

D47

D46

1

0 OHM

(RED)

JP41

1

0 OHM

D43

D42

D53

2

-2dB

(RED)

-4dB

JP46

2

2

(RED)

-12dB

R61

10K

R50
1M

-6dB

D45

D44

-8dB

-10dB

LIMLEDS_CH2

+15VA

1

3

+

-

+

-

+

-

+

-

+

-

+

-

Q6
2N4403

U9D

LM339

U9C

LM339

U9B

LM339

U9A

LM339

U8D

LM339

U8C

LM339

14

13

2

1

14

13

U8B

+

-

+

-

LM339

U8A

LM339

2

1

-15VA

(RED)

-15dB

D41

(RED)

-25dB

D40

(RED)

CH2 COMPRESSOR LEDS

D55

1N4148

D54
1N4148

2

COMPLEDS_CH2

R62
8K45

R64
5K90

R65
5K49

R66
5K76

R67
100K0

R60
120 OHM

1

Q7
2N4403

3

-3dB

U11D

9

+

8

-

11

+

10

-

5

+

4

-

7

+

6

-

R63

CH2 LIMITER LEDS

1M

DRAWN:

RELEASED:

14

LM339

U11C

13

LM339

U11B

2

LM339

U11A

1

LM339

D58

D57

D56

-15VA

JP54

2

0 OHM

(RED)

-9dB

(RED)

-12dB

(RED)

1

D59

-6dB

.01uF/25V

DETECT_CH2

-15VA

C13

+15VA

DATED:

DATED:

D65
1N4148

D64
1N4148

R71
10K

2

R68
549 OHM

R69
1K21

R72
3K83

R73
12K1

R74
30K1

R70
120 OHM

1

Q8
2N4403

3

U12D

9

+

8

-

LM339

U12C

11

+

10

-

LM339

5

+

4

-

LM339

U12A

7

+

6

-

LM339

COMPANY:

TITLE:

DRAWING NO:

EXPLEDS_CH2

JP24

+15VA

2

0 OHM

2

0 OHM

2

2

0 OHM

JP22

JP23

0 OHM

JP25

14

13

COMPLEDS_CH2

-20

D60

(GREEN)

-10

D61

LIMLEDS_CH2

O/PLEDS_CH2

U12B

2

1

D63

-15VA

(GREEN)

D62

(GREEN)

0VU

-15VA

CLIP

(RED)

CH2 OUTPUT LEDS

SYMETRIX INC.

14926 35th Ave. W.

Lynnwood, WA 98037

425 LED DAUGHTERBOARD

023425

9

J1I

10

1

1

1

1

J1J

11

J1K

12

J1L

13

J1M

14

J1N

15

J1O

16

J1P

LEDBUSS

SHEET:

REV:

A0

OF

24

D

C

B

A