Akai AM-2450 Schematic

This is a custom vector drawing based on AKAI original schematic, made by my own. The size is ISO A2 (594x420 mm) but may be scaled to any size for printing and/or viewing.

You may download to a local hard disk extracts and/or print this document for personal (non commercial) and educational use only. Commercial copying, hiring, lending of this document or any part of this document is prohibited.

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AM-2450 SCHEMATIC DIAGRAM

ALL VERSIONS

C4 47

C5 2.2

4

10

C7

0.0018(J)C90.0047(J)

10

R4 180k

C6

100p

1.8

14.6

6

5

911

1.8

14.9

C8 (LL) 1

7

8

29.8

R5 16k

R6 68k

R7 1k

35.5

R8 1.2k

9

6
2

8
4
7

PHONO

TUNER

R1
68k

L

R

R2 2.2k

C2 (LL)

4.7/25

L

C1

22/10

6.9

1

14

6.7

R3 220k

C3

0.001

0.600.6

3

2

IC1 LA3133

12

13

0.600.6

R

C11

C10

0.047(Z)

100/35

3

10

AUX

J1

L

R

TUNER

SELECTOR

SW1

PHONOAUX

51

INPUT P.C. BOARD M3-4501A

TAPE 1

PLAY

DIN

REC/PLAY

TAPE 2

PLAY

REC

REC

1

J2

L
R

R11

R9

R10

160k

160k

R12 39k

39k

L
R

J5

1

4

2

3

5

J4

L

R
L
R

J3

5

DUB 1-2

TAPE1

SW2

TAPE MONITOR

SOURCE

TAPE2

3

4

2

DUB 2-1

TAPE P.C. BOARD M3-4501B

1

1

1

SW1-2a

OFF ON

LOUDNESS MODE

VR2 250k(B)

12

6

SW1-2b

OFF ON

5

R3
22k

C2 0.012

VOLUME

C1 220
p(K)

R2
39k

10

11

6

4

5

BALANCE

VR1 250k(MN)

1

1

2

2

3

3

2

1

7

8

2

3

9

R1

4.7k

STEREO MONO

SW1-1

1

3

4

MAIN VOL. B. BALANCE P.C. BOARD M3-4502A/B

WARNING: DENOTATES SAFETY CRITICAL COMPONENTS. FOR CONTINUED SAFETY

AVERTISSEMENT: IL INDIQU LES COMPOSANTS CRITIQUES DE SURETE. POUR

NOTE: Your use of this document is entirely at your own risk, for which I shall NOT BE LIABLE. Thus, that assumes or undertakes NO LIABILITY for any
loss or damage suffered as a result of the use, misuse or reliance on the information and content on this document. All of the information provided in this
document is provided "AS-IS" and with NO WARRANTIES.

Published on http://akdatabase.com/AKview/

!

REPLACE SAFETY CRITICAL COMPONETS ONLY WITH MANUFACTURER’S
RECOMMENDED PARTS.

!

MAINTENIR LE DEGRE DE SECURITE DE L’APPAREIL NE REMPLACER LES
COMPOSANTS DONT LE FONCTIONNEMENT EST CRITIQUE POUR SECURITE
QUE PAR DES PIECES RECOMMANDEES PAR LE FABRICANT.

NOTE

1. UNLESS OTHERWISE SPECIFED
ALL REISTORS IN OHMS 1/4W (J)
ALL CAPACITORS IN uF 50WV (K)

2. (LL) = LOW LEAKAGE CAPACITORS

3. (FS) = FAIL SAFE RESISTORS

4. MARK INDICATE NON POLAR

ELECTROLYTIC CAPACITORS

TR2 2SC2229(O,Y)

R5
33k

C3 330p

TR1

0.1

C2 100p

-45.0

R6 2.2k

-45.0

-41.0

TR3 2SA1015(O,Y,GR)

R8

3.3k

C7

-45.0

TR2

TR3

33

R7 47k

0.2

C5
47/10

R3

3.6k

-1.0

-44.3

-46.1

0.7

-41.0

-41.0

C6 33p

C4

0.0012

35.5

14

24

C1 0.47

25(M)

R2

4.7k

R1 47k

23

R4 4.3k

-41.0

TR5 2SC2235(O,Y)
TR7 2SD718(R,O)

IDLING

CURRENT

R11 100

VR1 1kB

R10 2.2k

R9 3.3k

33

-0.5

R12

(FS) 820

34

29

2

30

-45.0

-41.0

IDLING

1

35.5

CURRENT

MAIN AMP. P.C. BOARD M3-4504A

8

35.5

7
6
5

R9 (FS) 470

4

1

C3
100/35

2

33.2

C1 0.1
25(M)

C2 100p

R1

2.2k

TR1

1.7

R4 470k

TR1,2 2SC2240(GR,BL)

C5 10p
500(D)

R2 270k

2.4

TR2

1.2

C4 47/10

R5

100k

R3 10k

20.0

R7 750

R6 5.6k

C6

4.7/25

1.9

R8 300

C7

47/10

3

TONE CONTROL P.C. BOARD M3-4503

TR15

TR5

1.2

32

TR6

-1.0

31

C8

0.015

R10 6.8k

R12
100k

C9

0.15
25

R11 1.5k VR1 50k(C)

C8 100p

C9
330p

R13

3.3k

BASS

44.4

0.7

R14 (FS) 150

R15 (FS) 150

-0.5

-44.3

44.4

R14 47k

TREBLE

R13 (FS) 4.7

0.7

41

44

-0.5

R16 (FS) 4.7

35

38

C10 0.0033

VR2 50k(C)

C11 0.027

R15 620

TR7

R17 5W

0.47(K)

R18 5W

0.47(K)

TR8

-44.5

-44.5-44.3

TR6 2SA965(O,Y)

44.5

TR8 2SB688(R,O)

42

R21 15k

43

R19 2.7k

0

0

C10 3.3

0

R20 2.7k

46

45

TR9 2SC2240(GR,BL)
TR10 2SA1015(O,Y,GR)

32.1

TR9

0

R22 15k

C11

0.1(Z)

C12

0.1(Z)

R23 (FS)

1/2W 10

D1

D2

C14

C15

R24 (FS)

1/2W 10

1S2472

1S2472

0.1(Z)

0.1(Z)

D3

C13

1S2472

0.047(Z)

TR11, 12, 15
2SC1815(O,Y,GR)

R26 47k

TR10

32.4

-1.9

R28 22k

TR11

32.4

a

R27
220

31.8

R30 10k

c

-46.1

U/T, CSA, AAL

L2 2.2µH(K)

a

R47(FS) 1/2W 10

MARK PARTS ARE
LOCATED ON MAIN
AMP. P.C. BOARD

36

M3-4505B

37

R29(FS) 1/2W 10

c

L1 2.2 H(K)µ

CEE, UK

a

L2 2.2 H(K)µ
L1 2.2 H(K)µ

c

40

39

44.5

7

8

28

IND901

25

9

R32 5.6k

TR12

b
d

b

d

b

d

TR13 2SC536(G,H)
TR14 2SD571(K,L)TR1 2SA979(G,H)

R31 75k

8.7

TR13

C17

2.2/25

0

R33 10k

0

R34 5.6k

U/T, CSA, AAL

R45 (FS) 27

f

e

CEE, UK

f

R35 39kR36 22

TR14

C16

R37 8.2k

R38
10k

f

D9-D12
GP30G

-44.5

6

C904

10000/52

R25 1k

8.8

220/10

e

e

8.1

R40 1W

C18

C19

R39
10k

C30

C32

35.5

D4
1S2472

C20

0.047(Z)

D5

220(K)

1S2472

470/6.3

RL1
MS24D4

-0Z

470/6.3

R59 1/2W 2.2k

VR2 500B

R52 330

D13

1S2473

36.8

TR4

37.3

C21 47

C22 100/63

D9

D10

D12

D11

C903
10000/52

27

R41
18k

LEVEL

-8.5

54.6

R46 1k

C29

C31

R42 24k

1

METER

R53 4.7K

D6

RD36E(C)

C29-C32

0.01/500(P)

44.5

26

0

4

IC1 TA7318P

3

-0.5

C34 0.0068

D7

C24 0.01

R48 1/2W

3.3K

500(P)

5

-8.5

5

72

-0.5

GP08D

C23 220

63

3

R54 27K

0

6

8

C35 0.0068

-46.1

C33, C36 - non polar

R55 27K

8.7

9

VR3 500B

-8.5

R58 1/2W

1.5K

35.5

-57.8

TR16

-46.7

R49 51K

C25 47

12

4

42.6V AC

0V

32V AC

0V
32V AC

8.3V AC

0V

C33
33/25(M)

C36
33/25(M)

LEVEL
METER

R57 330

R56 4.7k

R50 10k

C26 33

VLT

VLT

WHT

BLK

WHT

ORG

ORG

43
2W
220(K)

D14
1S2473

C27 100

63

!

T901

AM-2450T-70

!

R44
2W
220(K)

D8
GP08D

C28

0.01
500(P)

BLU

240V

WHT

220V

BRN

110V

RED

0V

F2 630mAT

R51

2.2k

F3 250/2A

F2 250/2A

F1 250/4A

SWITCHED

SW901

VLT

18
17

16
15

22
21

20
19

10

11
13

!

RED

!

C901

0.01/500(P)

T901

AM-2450T-40

B A

RIGHT

LEFT

TM902

3

2

1

12

11

SW902

PHONES

J901

D1 SY-405D

LED P.C. BOARD
M3-4504C

AC OUTLET

!

J902

UNSWITCHED

!

!

WHT

TM901

4

5

6

8

9

10

SPEAKERS

OFF

LEFT ME902

POWER LEVEL METERS

RIGHT ME901

!

U/T

AC 110V to 240V

!

SW901

BRN

RIGHT

LEFT

7

A

B

A+B

CEE

AC 220V

SPEAKER

E C B

2SA1015
2SC536
2SC1815
2CS2240

F2 630mAT

!

F3 4AT

!

F4 4AT

!

F1 630mAT

!

E C B

VLT

VLT

WHT

BLK

WHT

ORG

ORG

2SA965
2SC2229
2SC2235

!

T901

AM-2450T-50

BLU

RED

E C B

F5 2AT

!

2SD571

SW901

!

C901

4700p/250

!

C902

4700p/250

VLT

WHT

F3 4AT

!

F4 4AT

!

F1 630mAT

!

!

BRN

UK

!

F2 800mA

AC 240V

!

J903

GRN/

YLW

F1 800mA

BLU

2SD612K

!

2SA979 2SB688

BLK

WHT

ORG

ORG

AM-2450T-20(AAL)
AM-2450T-30(CSA)

VLT

VLT

WHT

BLK

WHT

ORG

ORG

T901

RED

!

YLW

120V

SWITCHED

RED

0V

F3 3.15A

!

!

J902

SW901

!

C901

4700p/250

!

C902

4700p/250

AC OUTLET

!

C901

0.01/125(P)

!

2SD718

E C B

B C E C B

B C E

AM-2450
SCHEMATIC DIAGRAM

NO. 2-2 1562041A

J903

BLU

UNSWITCHED

!

GRN/

YLW

CSA, AAL

AC 120V

!