Fostex X-24 service manual Block, Mixer / Jack PCBs

MIXER / JACK PCBs

5.

CIRCUIT

JACK PCB (1/2)

MIXER PCB

&

S S

(+7.1dB)

C151

(+6dB)

R105

C105

T T

R150

22P

10P

L R

C154

BLOCK

TRIM

100K

+VCC

68K

+VCC

22P

+VCC

R113

(6.0dB)

-17.1dBV

R152

(0dB <-> 40dB)

-10dBV

INPUT

R116

R118

-10dBV

24K

R103

R130B

C107

1

U101A

FADER

12K

24K

30K

8

C152

J101

8

4

C109

+VCC

2

10/16

1K

4

6

2

10/16

10/16

R131

1

-16dBV

+VCC

-10dBV

1

1

2

20KA

C113

3

3

4560

3

C101

R101

J1

W1

5

C103

3

2068

R111

3

-16.0dBV

2

8

-10dBV

10/16

PAN

C150

U4A

R151

8

C155

R154

J4

100/10

U1A

REC 7

1

D101

1

R133

2

220P

4

2

12K

2

10/16

INPUT MIC 1/3

NON

12K

4

12K

4560

R134A

1K

3

3

3

2

3

U2A

50KB

1

2

L

(BALANCE)

2

2

100KCC

R107

D102

4

U101D

R119

-VCC

3

4556

-10dBV <> -50dBV

1

U5A

U105

1

STEREO OUT

1

1

-VCC

47K

-VCC

4 5 1

C153

R153

1

R115

9

30K

4

3

2

-10dBV

INPUT IMP

C102

R102

R130A

R112

R114

8

220P

47K

2

C104

U101B

+VCC

-VCC

47K

R117

3

MIC :12Kohm

12K

2

100/10

100K

12K

6

24K

-VCC

1

R

LINE:22Kohm

3

1

3

11

10

R109

+VCC

A.B

R104

R125

R126

DTC314TK

J102

1K

7

8

9

PB

1

47K

U103

12K

C251

1

R106

C106

2

2

3

22P

MASTER

10P

DTC144EK

R250

FADER

DIAGRAMS

100K

3

2

68K

20KAA

C254

U101C

1

U102

C252

22P

1

6

10/16

AGND

3

4

DTC144EK

7

R134B

R252

-VCC

-VCC

5

4560

6

24K

C205

A.B

5

C250

U4B

C255

R254

R205

220P

5

6

10/16

10P

7

1K

100K

R251

TRIM

+VCC

5

4556

INPUT

R213

4

12K

U205

(0dB <-> 40dB)

R216

R218

C253

U5B

R253

R203

R230B

C207

1

U201A

C209

FADER

12K

24K

30K

220P

3

2

J201

4

47K

1K

4

6

6

10/16

10/16

R231

1

2068

7

1

2

20KA

C213

3

C201

5

C203

5

R211

3

6

10/16

PAN

DTC314TK

R201

J2

W2

100/10

U1B

D201

7

2

INPUT MIC 2/4

NON

12K

REC 7

1

12K

2

5

4560

R233

C256

(BALANCE)

3

3

R207

3

U2B

50KB

R256

2

2

100KCC

D202

U201D

R219

470/10

W3

J3

-10dBV <> -50dBV

1

1

47K

-VCC

4 5 1

16

1

R215

9

30K

3

3

PHONES OUT

INPUT IMP

C202

R202

R212

8

R

2

R230A

C204

U201B

+VCC

R214

47K

2

2

(16ohm 20mW)

MIC :12Kohm

NON

12K

2

100/10

100K

12K

R217

L

3

1

3

11

10

6

C156

R156

1

1

LINE:22Kohm

24K

GND

R209

+VCC

A.B

470/10

16

R204

7

8

9

PB

1

R225

R226

R155

R255

J202

1K

47K

30K

+VCC

47K

J5

1

C206

2

2

3

U203

12K

47K

R206

10P

DTC144EK

100K

U201C

1

U202

3

2

CH1 BAR GRAPH

HGND

1

3

4

-10dB

W4

AGND

DTC144EK

D103

PUNCH IN/OUT

-VCC

-VCC

2

A.B

5

C114

R120

-5dB

1

10/16

U104

LINE IN1

12K

8

IN

OUT1

1

D104

-10dBV

+VCC

C108

INPUT

R313

R122

7

OUT2

2

0dB

J6

INPUT IMP

10/16

R110

1

R316

R318

R121

10K

AMP

OUT3

3

D105

FADER

4

14Kohm

47K

4

U301A

C309

12K

+VCC

24K

30K

5.1K

C115

OUT4

6

+3dB

R108

10/16

R331

10/16

5

GND

OUT5

9

4.3K

1

2

20KA

8

C313

3

VCC

D106

JACK PCB (2/2)

2

R311

3

1

10/16

PAN

2

BA6124

+6dB

REC 7

1

D301

-VCC

J104

12K

2

3

4560

R333

D107

3

U3A

U301D

50KB

LINE IN2

D302

4

R319

CH2 BAR GRAPH

-VCC

4 5 1

-10dBV

1

R315

9

30K

C208

R312

R314

8

-10dB

U301B

+VCC

47K

INPUT IMP

10/16

R210

100K

12K

-VCC

6

R317

D203

14Kohm

R208

47K

11

10

A.B

24K

C214

-5dB

R325

R309

R326

+VCC

10/16

U204

D204

4.3K

PB

1

30K

8

1

47K

U303

12K

R222

IN

OUT1

2

2

3

7

OUT2

2

0dB

J204

DTC144EK

R221

10K

AMP

3

D205

3

2

12K

OUT3

4

U301C

1

5.1K

C215

OUT4

U302

R220

6

+3dB

LINE IN3

1

10/16

5

OUT5

9

D206

-10dBV

C308

3

4

DTC144EK

GND

VCC

INPUT IMP

10/16

R310

A.B

5

-VCC

-VCC

-VCC

BA6124

D207

+6dB

14Kohm

47K

R308

4.3K

+VCC

CH3 BAR GRAPH

INPUT

R413

R416

R418

-10dB

1

FADER

D303

J304

U401A

C409

12K

24K

30K

4

R431

10/16

C314

-5dB

1

2

20KA

C413

3

10/16

10/16

U304

D304

LINE IN4

R411

3

6

10/16

PAN

C315 8

IN

OUT1

1

-10dBV

C408

REC 7

1

12K

D401

2

4560

7

R433

2

R322

OUT2

2

0dB

INPUT IMP

10/16

R410

3

5

U3B

U401D

50KB

R321

7

AMP

OUT3

3

D305

D402

R419

OUT4

4

14Kohm

R408

47K

-VCC

R415

4 5 1

5.1K

10K

6

+3dB

H+VCC

1

9

8

30K

R320

5

OUT5

9

D306

4.3K

U401B

+VCC

R412

R414

47K

12K

GND

VCC

100K

12K

6

R417

BA6124

11

10

24K

-VCC

D307

+6dB

J404

H+VCC

1

R409

+VCC

A.B

D1

R1

2

3

PB

1

R425

30K

R426

+VCC

TRK1

47K

U403

12K

CH4 BAR GRAPH

750

U7

2

SW1

DTA144EK

2

3

3

DTC144EK

-10dB

W5

1

2

U401C

2

D403

D2

R2

1

1

U402

1

2

3

1

C11

C414

AGND

TRK2

DTC144EK

R127

R420

-5dB

750

U8

3

4

22P

10/16

U404

D404

+VCC

2

SW2

C13

12K

12K

-VCC

3

1

2

DTA144EK

-VCC

-VCC

R10

8

IN

OUT1 1

HGND

4

AGND

1

A.B

5

R12

22P

R227

R422

7

OUT2 2

0dB

H+VCC

5

D3

R3

2

3

12K

+VCC 12K

12K

R421

10K

AMP

OUT3

3

D405

6

TRK3

C415

4

H-VCC

HGND

750

U9

R327

5.1K

OUT4

+3dB

SW3

8

10/16

5

OUT5 6

DTA144EK

R11

12K

GND

VCC

9

D406

1

2

C14

2

R4

1

10/16

6

12K

1

R427

BA6124

+6dB

D4

-VCC

TRK4

2

3

WIDE PITCH

7

4560

3

C10

-VCC

D407

750

U10

4560 5

U6A

12K

SW4

DTA144EK

CONTROL

U6B

C12

4

220P

H-VCC

1

2

(+15% <-> -50%)

R13

220P

+VCC

H+VCC

D5

R5

2

1

3

R135

47K

-VCC

C5

A.B

10KB

750

U11

4

C1

47/10

J7

+VCC

SW5

POWER LED

DTA144EK

5

3

47/10

1

1

2

1

1

TOP SHIELD

D7

R7

REC

D6

R6

2

3

2

C2

47/10

C6

750

LED

750

U12

AGND

HGND

AGND

47/10

DTA144EK

-VCC

H-VCC

1 1 1 1

AGND

-VCC

H-VCC

AGND

W6

1 2 3 4 5 6 7 8 9 0 1 2 3

1 2 3 4 5 6 7 8

W7

1 2 3 4 5 6 7 8 9

W8

A R T T T T T T T T A P

P P P P R R R R

E E E E A A A A P

• E R R R R R R R R •

I

B B B B E E E E

/ / / / • • • • •

B C K K K K K K K K B T

4 3 2 1 C C C C

D D D D B B B B M

1 2 3 4 1 2 3 4

C

1 2 3 4

1 2 3 4 1 2 3 4 U

H

T

LED

SEL

E

SW

23 X-24