Akai AC-A2624 Service Manual

SERVICE MANUAL

POWER AMPLIFIER

ACA-2624

Circuitry Frame

ACA-2664 ACA-2624

FL-OUT

AMP

POWER

SW101B

LPF

HPF

5 7

VR103C

FR-OUT

AMP

T151-T157

T158-T161

OFF

POWER

T162-T165

SW101A

HPF

5 7

T251-T257

T258-T261

T262-T265

LPF

OFF

RL-OUT

AMP

POWER

SW301B

LPF

HPF

3 1

VR303C

RR-OUT

AMP

T351-T357

T358-T361

OFF

POWER

T362-T365

SW301A

HPF

3 1

T451-T457

T458-T461

T462-T465

LPF

OFF

PTOTECT

T166,T167

T266,T267

T366,T367

T466,T467

CONTROL

MUTE

VEE

VCC

+/-15

T100,T200

T300,T400

T17

T01

IC02

IC03

TRANS & REGULATOR

CROSSOVER

T09,T10

30Hz-5KHz 12dB/OCT VARIABLE

13

75

POWER

T11-T16

REGULAT OR

T01-04

T22,T23

IC103A IC103B

VR103D

IC102A

3 1

IC203A IC203B

VR103A VR103B

IC102B

IC303B IC303A

VR303D

IC302B

5 7

IC403B IC403A

VR303B VR303A

IC302A

POWER

CONTROL

IC01

T07

T08

@ 50Hz

BOOST 0-12dB

INPUT

VR102B

AMP

IC101A

2 1

VR101A

L-IN

VR102A

IC101B

5 7 5 7

VR101B

R-IN

VR302A

IC301A

2 1

VR301A

RL-IN

VR302B

IC301B

5 7 3 1

VR301B

F01

RR-IN

REM

D.C.

+12V

D

C

B

A

FL

4.7uF/50V

AV4-8.4-13

B

4.7uF/50V

FR AV4-8.4-13

B

RL

4.7uF/50V

AV4-8.4-13

B

4.7uF/50V

RR AV4-8.4-13

IC102A

1/2 4558

C101

R101 1K

C102 102(C)

A

C201

R201 1K

C202 102(C)

A

L101 SHORT

R116 SHORT

C301

R301 1K

C302 102(C)

A

C401

R401 1K

C402 102(C)

A A

C111

OPEN

Z102

OPEN

Z202

OPEN

Z302

OPEN

Z402

Z101

Z201

Z301

Z401 OPEN

R103

1K

R203

1K

C112

OPEN

R303

1K

R403

1K

VR101B B20K

A

VR301B B20K

VR301A

R104 10K

VR101A B20K

R204 10K

R304 10K

B20K

R404 10K

5 6

3 2

R206 10K2

R406 10K2

2

3

R106 10K

IC101B 1/2 4558

R205

6 5

R306 10K

IC301A 1/2 4558

R405

R105

47K

R305 56K

47K

56K

IC101A 1/2 4558

VR102B 500KB

7

VR102A 500KB

IC301B 1/2 4558

VR302A 500KB

1

VR302B 500KB

1

7

R107 1K

3 2

R108 56K

R111 1K

R207

IC102B

1K

1/2 4558 5 6

C203 563(M)

R208 56K

R211 1K

R307 1K

5 6

C303 563(M)

R308 56K

R311 1K

IC302A 1/2 4558

R407 1K

3

2

C403 563(M)

R408 56K

R411 1K

C103 563(M)

7

IC302B 1/2 4558

R310

56K

A

R410

56K

1

C104 563(M)

1

A

C204

563(M)

R210 56K

A

563(M)

7

VR303A

C404

563(M)

R110 56K

C304

C100K

R409 68K

A

R109 68K

VR103A

C100K

R209 68K

C205 563(M)

VR303B C100K

R309 68K

C305 563(M)

C408 563(M)

R412 10K

C405 563(M)

C108 563(M)

VR103B C100K

R112

10K

VR103D C100K

C105 563(M)

C208 563(M)

R212

10K

VR103C C100K

C308 563(M)

R312

10K

VR303C C100K

C409 104(M)

R415 1K

VR303D C100K

R214 22K

R215 1K

A

C309 104(M)

R315 1K

A R414

C406 104(M)

R413 10K

C109

R115 1K

C106 104(M)

R113 10K

A

C209 104(M)

C206 104(M)

R213 10K

C207 563(M)

R314

22K

C306 104(M)

R313 10K

C307

563(M)

22K

C407 563(M)

R114

104(M)

C107 563(M)

3

2

22K

3 2

5 6

5

6

3 2

5

6

3 2

IC303A 1/2 4558

IC303B 1/2 4558

5 6

IC403A 1/2 4558

IC403B

1/2 4558

7654321

R171

T161 OPEN

T260 OPEN

R270

R271

T261

OPEN

R170

T162

KTD718

R172

OPEN

R173

OPEN

T163

TKB688

T165 OPEN

T264

OPEN

T262

KTD718

R272

OPEN

R273

OPEN

T263 TKB688

T265 OPEN

VCC

VEE VCC

VEE

T164 OPEN

R174 1K5

R274 1K5

R275

R175

30K

T166 2N5551

R176 56K

C164

100uF/16V

T266 2N5551

30K

C162 151(C)

1N4148

D151

T167 9014

PROTECTION

C262 151(C)

D251

680/2W

1N4148

O/P

PROTECTION

O/P

PROTECTION

R177

680/2W

C163 104(M)

R277

T267

9014

+15V

C249 104(C)

7

FL-AMP

HI

7

OFF

1

7

HI

LO

1

IC203B 1/2 4558

HI

LO

IC203A 1/2 4558

RL-AMP SW301A

HI

LO

RR-AMP SW301B

OFF

LO

FR-AMP SW101A

SW101B

C149 104(C)

I/P

MUTE

C150

4.7uF/50V

R100

OPEN

R200

OPEN

C250

4.7uF/50V

IC103B 2/24558

IC103A 1/24558

-15V

1

OFF

1

OFF

7

R150

5.6K

2(G)

R250

5.6K

2(G) T100

OPEN

T200 OPEN

4.7uF/50V

10uF/25V

C151

4.7uF/50V

10uF/25V

C251

C254 10uF/25V

C153

R151 22K

C154

3 (S)

1(D)

3(S)

C253 10uF/25V

R251 22K

C152 102(C)

R252

C252 102(C)

R152

1K

+15V

1K

-15V

+15V

-15V

POWER-AMP[FL]

R156 1K

T151

5551

*

7K5

R154 7K5

1K

R153

*

5401

R155

T153

R157 100

R159 100

R161 1K

T154 5401

C155 15(C)

R158 100

R160

100

POWER-AMP[FR]

R256 1K

T251

5551

*

R253

7K5

*

R254

7K5

R255

1K

R257 100

R259 100

T253

5401

C255

R261

15(C)

1K

POWER-AMP(RL]

[SAME AS FL-CH]

POWER-AMP(RR]

[SAME AS FR-CH]

R258 100

R260

100

T254 5401

T152 5551

T252 5551

R162 15K

R262 15K

C157 47(C)

C257 47(C)

R164 100

R163 560

C156

100uF/25V

C158 47(C)

R167

100

R264

100

R263 560

C256

100uF/25V

C258 47(C)

R267

100

T155 5401

*

R165 4K7

2N5551

R166 1K8

T156 5551

T255 5401

*

R265 4K7

2N5551

R266 1K8

T256 5551

T157

T257

C159 47(C)

T158 2SC2383

T159 2SA1013

C161 47(C)

C259 47(C)

T258 2SC2383

T259 2SA1013

C261 47(C)

C160

C260

473(M)

R168 220

R268 220

R169 OPEN

R269

OPEN

T160 OPEN

0.12/3W

R178

4.7/0.5W

R276 56K

R278

4.7/0.5W

C263 104(M)

O/P

GND

8

PROTECTION

C97

OPEN

C99

OPEN

SPK01

FRONT OUT

SPK02

REAR OUT

FLFL+ FRFL+

RLRL+ RRRR+

D

C

B

A

ACA-2624-AMP-PA4-4.SCH

1 2 3 4 5 6 78

7654321

8

T07 2SA1013

R15 130KF

D

R44

C50

10K

104(C)

C

R01 4K7

R02 4K7

B

T23 9014C

T01

9015C

C01 100U/16V

T22

9015C

47U/16V

C52

C51

C03

C02

100U/16V

R06 10K

T03

9014C

104(C)

T02

C08 104(C)

R03 10K

9015C

1N4148

R07 1K

C11

R16

104(C)

51KF

16

14

15

Ref

2IN-

2IN+

1IN-21IN+

3

1

R05 10

C04

100U/16V

TH01 R04 68K

50KTH

t

D01

R12 1K

JP3

OPEN

R48 56K

C06 100U/16V

C09 10U/25V

R13 27K

C05 102(M)

R08 22K

12

OUT13VCC

C12

10U/25V

T05 9014C

C211E210E1

R14 15K

R09 33K

R25 10K

9

C18GND7RT6CT5DTC4Fback

R19 4K7

R21 4K7

R23

R24 1K2

IC01 KIA494AP

T04 5401

T08 9014C

C13

51K

LED01 SAM3270

R10 15K

R17 10 1/2W

R18 4K7

R22 1K2

C07 100U/25V

473(C)

C10 47U/50V

R11 15K

F01

D17 1N5404

D08 FR154

D07 FR154

D06 FR154

D05 FR154

D13 C25-02C

R38 OPEN

C26

OPEN

D12 C25-02N

15A

L03

SHORT

R41 OPEN

R42 OPEN

R43 OPEN

OPEN

R36

*150 2W

C20 4U7/50V

C21 4U7/50V

R37

*150 2W

C27

C28

L01 SHORT

C33 OPEN

C35 OPEN

C36 OPEN

C37

OPEN

G 2

JUMPER

IC02 OPEN

1

I

G

Z1 1N4744

2

1

Z2 1N4744

G

2

I

IC03 OPEN

JUMPER

C29

3300U/50V

C31 104(C)

C32 104(C)

C30

3300U/50V

S 3

T17 OPEN

D 1

C34 OPEN

L02

CL-310 8T 1.8uH

R20 10K

C14 104(C)

D02

1N4148

T09

9015C R26 220

R27 220

D03

1N4148

PROTECTION

9015C

D04

1N4004

T06 9014C

T15

OPEN R45 OPEN

T13

T14

FQP50N06

C15

2200U/25V"RX"

C16

2200U/25V"RX"

C17 104(C)

FQP50N06

T16 FQP50N06

C18

OPEN

R30 47

R31 47

T11

R28

FQP50N06

1K

R29 1K

R32 OPEN

T10

T12

OPEN

R33 47

R46 47

C19 OPEN

R34 OPEN

TR01

362315-40554

R35 OPEN

D15

OPEN D16

OPEN

O

JSZ3-06C

+12V

REM

GND

3

R39 10K/0.5W

R40 10K/0.5W

MUTE

P01

C22 220U/25V

C23 220U/25V

C24 104(C)

C25 104(C)

+15V

-15V

VCC

VEE

D

C

B

A

ACA-2624-POWER-P A 4-4.SC H

1 2 3 4 5 6 78

PA4-4.PCB X060210