Akai ACR-57 User manual

Akai
Brand
Akai
Model
ACR-57
Category
Car media receivers
Type
User manual

Akai ACR-57 lets you listen to the radio, a compact disc, or even use its AUX port to connect a portable music player. The Akai comes with a variety of features including:

  • Radio: The Akai ACR-57 can pick up AM, FM, and Longwave radio signals. With this capability, you can listen to your favorite local stations or tune in to distant broadcasts. It also comes with a digital tuner that makes it easy to find and store your favorite stations.

  • CD Player: The Akai ACR-57 has a built-in CD player that can play both audio CDs and CD-Rs. This allows you to listen to your favorite music CDs or even create your own custom CDs.

Akai ACR-57 lets you listen to the radio, a compact disc, or even use its AUX port to connect a portable music player. The Akai comes with a variety of features including:

  • Radio: The Akai ACR-57 can pick up AM, FM, and Longwave radio signals. With this capability, you can listen to your favorite local stations or tune in to distant broadcasts. It also comes with a digital tuner that makes it easy to find and store your favorite stations.

  • CD Player: The Akai ACR-57 has a built-in CD player that can play both audio CDs and CD-Rs. This allows you to listen to your favorite music CDs or even create your own custom CDs.

PULL SYNTHESIZED STEREO RADIO WITH
COMPACT DISC PLAYER DIGITAL
OPEN
1
PA U
2
SCN
3
RPT
4
SHF
5
CD
6
CD
MANU/
SKIP
CLK SET
DSP
P-EQ
MONO LOC MUTE MODE BAND
LOUD
RESET
COLOR
HOUR
IR
AMS
MINUTE
EJECT
DUAL TIME CAR COMPACT PLAYER
POWER
A
U
D
I
O
A
D
J
U
S
T
DIGITAL TIME
PMAM
ST
LOUD CDP
2
CONTENTS
Page
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
3
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.
4
DISASSEMBLY DIAGRAM
5
OPERATION CHECK
GENERAL SPECIFICATIONS OF SIGNAL
Standard frequency
Signal output
Modulation
FM
MW
LW
FM
MW
LW
MW
FM Stereo
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%
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
4-SPEAKER
VTVM
DISTORTION
METER
2-SPEAKER
FRONT
SPK.
SPK.
FL.
RL.
SPR.
MAIN UNIT
AM SG
VTVM ANTANNA
DUMMY
FM SG
MODULATOR
STEREOS
MPX
ANT
FRONT
SPK.
SPE.
FR.
RR.
4-SPEAKER
SPK.
2-SPEAKER
POWER ANTANNA
ACC (DV14.4V)
GROUND
BACK UP (14.4V)
6
BLOCK DIAGRAM
7
ALIGNMENT LOCATIONS
FM/AM TUNER
8
ALIGNMENT PROCEDURES
FM ADJUSTMENT
Equipment Required
z AM IF/RF signal generator
z Solid-state voltmeter (SSVM)
z Regulated DC power supply
z 2-CH voltmeter
z Distortion meter
FM Alignment Using FM Signal Generator
Note: Press the radio power switch to on the radio. Signal generator output must be kept as low as possible
to avoid overload and clipping.
Step Generator
Coupling
Generator Display
Setting
Adjustment Remarks
Stereo
Separation
Signal
generator
to antenna
receptacle
98.1 MHz
Int. 1 kHz
Dev. 75 kHz
L+R = 90 %
pilot = 10 %
98.1 MHz
VR1
Adjust AF
output power
at maximum
separating
more than 30 dB
FM SNC
Adjustment
98.1 MHz
Dev. 75 kHz
L+R=90 %
Int. 1 kHz
60dBµV output
98.1 MHz
@ 40 dBµ
98.1 MHz
VR2
Stereo Separation
25 dB (±5 dB)
STOP
SENS.
Signal Generator
to antenna
receptacle
98.1 MHz
Mod. 1kHz
Dev 75kHz
98.1 MHz
VR3
Adjust AF to stop
station.
Note: The tuner module is well-adjust and adjustment is not recommended.
9
PRINTED CIRCUIT BOARDS
MAIN BOARD
10
KEY BOARD
TOP VIEW
11
KEY BOARD
BOTTOM VIEW
12
CD SERVO BOARD
TOP VIEW
13
CD SERVO BOARD
BOTTOM VIEW
14
LAMP BOARD
15
WIRING DIAGRAM
  • Page 1 1
  • Page 2 2
  • Page 3 3
  • Page 4 4
  • Page 5 5
  • Page 6 6
  • Page 7 7
  • Page 8 8
  • Page 9 9
  • Page 10 10
  • Page 11 11
  • Page 12 12
  • Page 13 13
  • Page 14 14
  • Page 15 15

Akai ACR-57 User manual

Akai
Brand
Akai
Model
ACR-57
Category
Car media receivers
Type
User manual

Akai ACR-57 lets you listen to the radio, a compact disc, or even use its AUX port to connect a portable music player. The Akai comes with a variety of features including:

  • Radio: The Akai ACR-57 can pick up AM, FM, and Longwave radio signals. With this capability, you can listen to your favorite local stations or tune in to distant broadcasts. It also comes with a digital tuner that makes it easy to find and store your favorite stations.

  • CD Player: The Akai ACR-57 has a built-in CD player that can play both audio CDs and CD-Rs. This allows you to listen to your favorite music CDs or even create your own custom CDs.

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