Akai AC-R57 Service Manual

PULL SYNTHESIZED STEREO RADIO WITH

COMPACT DISC PLAYER DIGITAL

OPEN

DSP

P-EQ

A

U

MONO LOC MUTE

DIGITAL TIME

PMAM

POWER

LOUD

MANU/
SKIP

CLK SET

ST

RESET

COLOR

T

D

S

I

O

U

A

J

D

LOUD

1

PA U

DUAL TIME CAR COMPACT PLAYER

2

SCN

CDP

3

RPT4 SHF

5

CD

6

CD

HOUR

IR

AMS

MINUTE

EJECT

MODE BAND

CONTENTS

Disassembly Instructions ..................................................................................................................................... 3

Disassembly Diagram.......................................................................................................................................... 4

Operation check................................................................................................................................................... 5

Block Diagram .....................................................................................................................................................6

Alignment Locations ............................................................................................................................................7

Alignment Procedures .........................................................................................................................................8

Printed Circuit Boards.......................................................................................................................................... 9

Wiring Diagram .................................................................................................................................................. 15

Exploded Views (Panel)..................................................................................................................................... 16

Exploded View Parts Lists (Panel) ....................................................................................................................17

Exploded Views (Cabinet) ................................................................................................................................. 18

Exploded View Parts Lists Cabinet) ..................................................................................................................19

Exploded View (Deck) .......................................................................................................................................21

Exploded View Parts List (Deck) .......................................................................................................................22

Schematic Diagram ...........................................................................................................................................24

Electrical Parts List ............................................................................................................................................ 26

Specifications..................................................................................................................................................... 32

Page

2

DISASSEMBLY INSTRUCTIONS

1. Using the unlock key that came with the unit or a similar tool, unlock the Mounting Box and remove

toward the rear of the unit.

2. Remove the screw (A) located on the rear of the top cabinet then remove the Top Cabinet.

3. Remove two screw (B) located on the rear of the bottom cabinet then remove the Bottom Cabinet.

4. Remove two screws (C) (one located at the left side and one located at the right side of the Front

Bracket) then remove the Left Hook and the Right Hook.

5. Open the panel and remove the Ring and the Panel Bracket.

6. Remove the screw (D) from the main board and remove two screws (E) each side of the base then remove

the Base.

7. Remove two screws (F) from the Front bracket and remove two screws (G) from the Rear cabinet.

Remove two screws (H) from the front deck bracket then remove the Front Deck Bracket.

Remove two screws (I) from the Rear Deck Bracket then remove the Rear Deck Bracket and the Deck.

8. Remove four screws (J) and two screws (K) from the heat sink then remove the Heat Sink and IC 8568 Heat

Sink.

9. Remove the screw (L) and remove the Antenna Clip.

Remove the screw (M) and remove the Wire Clip.

10. Remove two screws (N) from the rear cabinet of the left side then remove the IC 7809 Bracket.

11. Remove four screws (O) from the main board then remove the Main Board.

12. Remove four screws (O) each side of the rear cabinet then remove the Front Cabinet and the Rear Cabinet.

3

DISASSEMBLY DIAGRAM

4

OPERATION CHECK

GENERAL SPECIFICATIONS OF SIGNAL

Standard frequency

Signal output

Modulation

AF output level FM/MW/LW

Power source voltage DC 14.0V (Backup voltage is the same as this)

AF load impedance 4 ohm pure resistance

Balance Center position of level

Tone Center position

The signal strength read in this section is voltage on the antenna.

Test Diagram

2-SPEAKER

FRONT
SPK.

FM

MW

LW

FM

MW

LW

MW

FM Stereo

4-SPEAKER

RL.
SPR.

FL.
SPK.

4-SPEAKER

RR.
SPK.

FR.
SPE.

98.1 MHz (87.5, 108 MHz)

1000 KHz (522, 1620 kHz)

200 KHz (144, 288 kHz)

1mV

5mV

5mV

400 Hz 30% MOD.

1 kHz 75 kHz DEV.

90% for L only or

R only pilot level 10%

2-SPEAKER

FRONT
SPK.

ACC (DV14.4V)

BACK UP (14.4V)

GROUND

DISTORTION
METER

VTVM

VTVM

DUMMY
ANTANNA

AM SG

MAIN UNIT

FM SG

POWER ANTANNA

ANT

MPX
STEREOS
MODULATOR

5