Service Manuals, User Guides, Schematic Diagrams or docs for : Akai CD CD-1581EYR CD-1581EYR

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PULL SYNTHESIZED STEREO RADIO WITH
COMPACT DISC PLAYER DIGITAL

CAR CD/MP3 PLAYER

LOC MON
EQ
EQ 9
CLAS ST
TUNE
SEL TRACK LOUD LOC
SKIP
8
SCN

DSP AMS 1 PAU 2 SCN 3 RPT 4 SHF 5CD 6CD MOD BND
0 MP3 7 LOUD/ENTER

MODEL: CD-1581EYR (X3.9.6.4)
CONTENTS

Page
Disassembly Instructions..................................................................................................................................... 3
Disassembly Diagram.......................................................................................................................................... 4
Operation check................................................................................................................................................... 5
Block Diagram ..................................................................................................................................................... 6
Alignment Locations ............................................................................................................................................ 7
Alignment Procedures ......................................................................................................................................... 8
Printed Circuit Boards.......................................................................................................................................... 9
Exploded Views (Panel) .................................................................................................................................... 15
Exploded View Parts Lists (Panel) .................................................................................................................... 16
Exploded Views (Cabinet) ................................................................................................................................. 17
Exploded View Parts Lists (Cabinet) ................................................................................................................. 18
Exploded Views (Deck) ..................................................................................................................................... 20
Exploded View Parts Lists (Deck) ..................................................................................................................... 21
Schematic Diagram ........................................................................................................................................... 23
Electrical Parts List ............................................................................................................................................ 25
Specifications..................................................................................................................................................... 32

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 top cabinet then remove the Top Cabinet.

3. Remove two screws (B) (one located at the left side and one located at the right side of the bottom cabinet)
then remove the Front Cabinet.
Take out the Ring and the Panel then remove three screws (C) from the base and remove the Base.

4. Remove two screws (D) and two screws (E) from under the bottom cabinet.
Remove two screws (F) from the deck then remove the Deck and the Deck Rear Bracket.

5. Remove four screws (G) then remove the Shaft Cover and the FIX Bracket.

6. Remove four screws (H) and two screws (I) from the Heat Sink (Y) then remove the Heat Sink (Y).

7. Remove the screw (J) from the rear bracket and remove two screws (K) from each side of the bottom
cabinet then remove the Rear Bracket (Y).

8. Remove the screw (L) from the main board then remove the Main Board and the Bottom Cabinet.

3
DISASSEMBLY DIAGRAM

4
OPERATION CHECK

GENERAL SPECIFICATIONS OF SIGNAL
Standard frequency FM 98.1 MHz (87.5, 108 MHz)
MW 1000 kHz (522, 1620 kHz)
LW 200 kHz (144, 288 kHz)
Signal output FM 1mV
MW 5mV
LW 5mV
Modulation MW 400 Hz 30% MOD.
FM Stereo 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

5
BLOCK DIAGRAM

6
ALIGNMENT LOCATIONS

FM/MW/LW TUNER

7
ALIGNMENT PROCEDURES

FM ADJUSTMENT

Equipment Required

AM IF/RF signal generator
Solid-state voltmeter (SSVM)
Regulated DC power supply
2-CH voltmeter
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 Generator Display Adjustment Remarks
Coupling Setting
Stereo Signal 98.1 MHz Adjust AF
Separation Generator Int. 1 kHz output power
to antenna Dev. 75 kHz 98.1 MHz VR1 at maximum
receptacle L+R = 90 % separating
pilot = 10 % more than 30 dB
FM SNC 98.1 MHz
Adjustment Dev. 75 kHz 98.1 MHz Stereo Separation
L+R=90 % @ 40 dB

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