Akai AT 2450 Service Manual

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Akai AT 2450 Service Manual

Extracted text from Akai AT 2450 Service Manual (Ocr-read)


Page 2

AT-2450

AM—2450

AKAI STEREO TUNER AND STEREO INTEGRATED AMPLIFIER

MODEL AT-2450 AM-MSO

ALSO APPLICABLE TO BLACK PANEL MODEL

SECTION 1 SERVICE MANUAL ...................... 1
SECTION 2 PARTS LIST ............................ 33
SECTION 3 SCHEMATIC DIAGRAM ................. 48

Page 24

XI. CLASSIFICATION OF VARIOUS P.C BOARDS

1. P.C BOARD TITLE AND IDENTIFICATION NUMBER
1) Model AT—2450

PrC Board Title P.C Board Number
Tuner P.C Board T3-4SOIA
Power Supply P.C Board T3-4502
LED P.C Board T345018 ;
Coil P.C Board T3-4501C
Filter P.C Board T3-4501D
Chart-4
2) Model AM-2450
P.C Board Title P.C Board Number fl
Main Amp P.C Board M34504A/B
Tone ControlP.C Board M34503
Main Vol. & Balance P.C Board M34502A/B ‘
Input P.C Board M3-4501A
Tape P.C Board M3-4501 B
LED P.C Board M34504C '
Chart 5

22

Page 36

HOW TO USE THIS PARTS LIST

1. This parts list is compiled by various individual blocks based on assembly process.
2. When ordering parts, please describe parts number, serial number, and model number in detail.
3. How to read list.
The reference number corresponds with illustration or photo number of that particular
parts list.
This number corresponds with the Figure Number.
This number corresponds with the individual parts index number
in that figure.
A small “x” indicates the inability to show that particular part
——-—- in the Photo or Illustration.
12-1 15X Schematic Diagram Number of individual
manufactured part.
(not required for parts order)

Ref. No. Parts No. Description _ SchematitNu

mamwrmmtmmmmmmmwmwmw “Wm

FLYWHEEL BLOCK #13
12-1in 800425 Flywheel Block Assy. Comp. RDGm

12-116 244506 Flywheel Only rum
12—1 17x 244754 Felt. Flywheel RD~275
12418 25I314 Main Metal Case RDVZSE
12-119 253080 Main Metal R0217

4. The symbol numbers shown on the PC. Board list can be matched with the Composite Views
of components of the Schematic Diagram or Service Manual.
5. The indications of Resistors and Capacitors in the photos of P.C. Board are being eliminated.
6. The shape of the parts and parts name, etc. can be confirmed by comparing them with the parts
shown on the Electrical Parts Table of RC. Board.
7. Both the kind of part and installation position can be determined by the Parts Number. To
determine where a parts number is listed, utilize Parts Index at end of Parts List.
It is necessary first of all to find the Parts Number. This can be accomplished by using the
Reference Number listed at right of parts number in the Parts Index. (meaning of ref. no.
outlined in Item 3 above).
8. Utilize separate “Price List for Parts” to determine unit price. The most simple method of
finding parts Price is to utilize the reference number.

CAUTION:

1. When placing an order for parts, be sure to list the parts no. model no., and description. There
are instances in which if any of this information is omitted, parts cannot be shipped or the
wrong parts will be delivered.

2. Please be careful not to make a mistake in the parts no. If the parts no. is in error, a part dif.
ferent from the one ordered may be delivered.

3. Because parts number and parts unit supply in the Preliminary Service Manual (Basic Parts List)
may be partially changed, please use this parts list for all future reference.

A INDICATES SAFETY CRITICAL COMPONENTS. FOR CONTINUED SAFETY, REPLACE
SAFETY CRITICAL COMPONENTS ONLY WITH MANUFACTURER’S RECOMEMNDED
PARTS.

MENT: A IL INDIQU LES COMPOSANTS CRITIQUES DE SURETE. POUR MAINTENIR LE
DEGRE DE SECURITE DE L’APPAREIL NE REMPLACER LES COMPOSANTS DONT LE
FONCTIONNEMENT EST CRITIQUE POUR LA SECURITE QUE PAR DES PIECES RECOM-
MANDEES PAR LE FABRICANT. - .

MC-Service

Page 44

AL ASSEMBLY BLOCK

5) FINAL ASSEMBLY BLOCK

:1? Parts No. Description 5%;qu
FRONT PANEL BLOCK
5-1 BD308062 Front Panel Biock Comp.
AT—2450 T315511
5-211 BD308061 Front Panel Block Comp.
AT-2450‘BL TIHSSA

5-3 TA30861 3 Front Plate “-4507
5-4 52305651 Button Escutcheon (B) CN’6352
5—5 SE308529 Button Escutcheon (A) CYfiolX
5-6x 515306936 Button Escutcheon (B—BL) CN'GSSZ
5-7 SK308641 Tuning Knob Stand T341529
5-8): SK308642 Tuning Knob Stand (BL) T3 1529
5911 25497878 Tapping Screw #2, 3x10(BR)
W=8

S40 SK305653 Push Bunon (A) CN>E309
S s-12x ZG305657 Button Spring CN76310

FINAL ASSEMBLY BLOCK
5-13 BC308635 Upper Cover (A)
(U/T, CSA, CEE, UK) T345“
5-1411 BC303636 Upper Cover (B) (AAL) THEN
5—15 25537006 Screw, binding head 4x8 (Black)
S-lsx 25308846 Tapping Screw #2, 3x8(BR)

(Oval Neck) 7—119 L
5-17 SK308643 Tuning Knob 134530
5-1sx SK308644 Tuning Knob (BL) 13-4530
5-19 sxaossss Knob (A) M34531
5—20x SK303565 Knob (A-BL) M34531 1
5.21 SK308567 Knob (B) M31532
5—22x sxaosses Knob (B-BL) 113-4532

MC-Service

42

.
Q

2

——————-——- When ordering parts, please describe Parts Number, Description, and Model Number in detail. ___—————- l