Service Manuals, User Guides, Schematic Diagrams or docs for : Akai CD CD-1751EYR CD-1751EYR

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PULL SYNTHESIZED STEREO RADIO WITH
COMPACT DISC PLAYER DIGITAL

MU DSP 0

POWER MUTE CAR CD/MP3 PLAYER
EQ
9
MANU/
SKIP
EQ LOC
AUDIO
EJ ADJUST CLAS ST IR

LOUD
MANU/
SKIP 8
SEL
MODE MP3 BND/LOU OPE N
7 M SCN MON LO C 1 PAU 2 SCN 3 RPT 4 SHF 5 CD 6 CD AMS
SW ENTER

MODEL: CD-1751EYR (X3.9.6.4/CDC)
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 ............................................................................................................................................ 27
Specifications..................................................................................................................................................... 33

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. Take out the Top Cover.

3. Remove two screws (A) from on the main board and remove two screws (B) from on the rear cabinet.

4. Remove two screws (C) from under the front deck bracket and remove the Front Deck Bracket.
Remove two screws (D) from under the rear deck bracket then remove the Deck and the Rear Deck
Bracket.

5. Remove two screws (E) from the front bracket.

6. Remove two screws (F) from each side of the bottom cabinet.
Remove two screws (G) from the front bracket of the left side then remove the Left Slide Support.
Remove two screws (H) from the front bracket of the right side then remove the Right Slide Support and the
Front Bracket.

7. Take out the Ring and remove two screws (I) from each side of the Panel then remove the Panel and the (U)
Guide Bar ASS'Y.

8. Remove the screw (J) from the Heat Sink (Y) then remove the Antenna Socket J-020-03 S. Hole..

9. Remove two screws (K) and three screws (L) from the Heat Sink (Y) then remove the Heat Sink (Y).

10. Remove the screw (M) from the rear cabinet then remove the 20PIN Plug W/2RCA W/O SW.

11. Remove the screw (N) from on the main board then remove the Main Board.

12. Remove two screws (O) from each side of the bottom cabinet then remove the Bottom Cabinet and the Rear
Cabinet

3
DISASSEMBLY DIAGRAM

4
OPERATION CHECK

GENERAL SPECIFICATIONS OF SIGNAL

Standard frequency FM 98.1 MHz (87.5, 108MHz)
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/AM 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 98.1 MHz VR1 output power
to antenna Dev. 75 kHz 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 98.1 MHz VR2 Stereo Separation
L+R=90 % @ 40 dB

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