Classe Audio SSP-30 MKII, Service Manual

File:

C:\MHT-project\MHTV2\MHTA1-v2\MHTA1-V21.DDB - Documents\MHTA1_Circle

Copyright © Sample Rate Systems Oy 1994 - 2000

22-Feb-2001

Printed:

Sheet:

1 of

7 , revision

1.0

Title:

Project:

MHTA1  MHT-100 Audio board 1

Circle surround switching

Sample Rate Systems Oy
Finlaysoninkatu 2
33210 Tampere, Finland

tel. + 358 3 254 2000
fax + 358 3 254 2030

, drawn by Vesa Koli

"EX-S" bypass, CS mode

SCLK

1

Din

3

Dout

22

CS

24

NO0

5

NO1

7

NO2

9

NO3

11

NO4

14

NO5

16

NO6

18

NO7

20

COM0

6

COM1

8

COM2

10

COM3

12

COM4

13

COM5

15

COM6

17

COM7

19

GND

4

V-

21

V+

2

Vl

23

IC18
MAX335EWG

McCSWCs

McMosi

McSClk

+5D

R69
220k

R70
220k

R89
220k

C162

100n

+5D

C153

100n

+15A

-15A

SCLK

1

Din

3

Dout

22

CS

24

NO0

5

NO1

7

NO2

9

NO3

11

NO4

14

NO5

16

NO6

18

NO7

20

COM0

6

COM1

8

COM2

10

COM3

12

COM4

13

COM5

15

COM6

17

COM7

19

GND

4

V-

21

V+

2

Vl

23

IC23
MAX335EWG

CircleS_bypass

McSClk
McMosi

C154

10u

C172

10u

C113

100n

C107

100n

+15A

C109

10u

C118

10u

3

2

1

8

4

IC27A

TL072

-15A

R133

20k

C182

33p

+15A

3

2

1

8

4

IC28A

TL072

R140

20k

C183

33p

R139

20k

5

6

7

IC27B

TL072

-15A

R148

20k

C198

33p

+15A

5

6

7

IC28B

TL072

R153

20k

C199

33p

R152

20k

A

B

R102
20k

R104
20k

R98
20k

R128
20k

R100
20k

R105
20k

R125
20k

R130
20k

R99
20k

R103
20k

R127
20k

R126
20k

R101
20k

R129
20k

3

2

1

8

4

IC19A

TL072

-15A

R77

20k

C116

33p

+15A

3

2

1

8

4

IC17A

TL072

R86

20k

C121

33p

R85

20k

5

6

7

IC19B

TL072

-15A

R63

20k

C106

33p

+15A

5

6

7

IC17B

TL072

R72

20k

C108

33p

R71

20k

BOutLsum

BOutRsum

SurOutLsum

SurOutRsum

R68

0R

R66

0R

R88

0R

R67

not installed

R65

not installed

R87

not installed

R131

not installed

R134

0R

R142

not installed

R149

0R

R73

not installed

R75

0R

R61

not installed

R62

0R

Sw_Ls

Sw_Rs

Sw_Lb

Sw_Rb

Sw_L

Sw_C

Sw_R

Main_L

Main_C

Main_R

Main_Ls

Main_Rs

Main_Lb

Main_Rb

CSout_L

CSout_C

CSout_R

CSout_Ls
CSout_Rs

Main_L

Main_C

Main_R

Main_Ls
Main_Rs

CSout_C

CSout_L
CSout_R

-15A

Option

Not Installed

Not Installed

STRAIGHT MODE:

 pass Main_Ls (COM1),
         Main_Rs (COM2)

CIRCLE SURROUND MODE:

 pass CSout_C (COM0),
         CSout_L (COM3),
         CSout_R (COM4),
         CSout_Ls (COM5),
         CSout_Rs (COM6)

In CS-mode back channel receives CsC-channel,
while CsL and CsLs are summed to Ls and CsR and CsRs are summed to Rs.