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AUTO REVERSE CAR STEREO
RADIO CASSETTE
PLAYER WITH PLL
SYNTHESIZED TUNING
FULL DETACHABLE PANEL
Model:
ASR95
SERVICE MANUAL
www.akai.ru
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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 ............................................................................................................................................12
Exploded View (Panel)...................................................................................................................................13
Exploded View Parts List (Panel)...................................................................................................................14
Exploded View (Cabinet)................................................................................................................................15
Exploded View Parts List (Cabinet)................................................................................................................16
Schematic Diagram........................................................................................................................................17
Electrical Parts List.........................................................................................................................................18
Specifications .................................................................................................................................................21
2
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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 back of the top cabinet then remove the Top Cabinet.
3. Open the panel and remove the Trim Ring then remove two screws (B) from the Base.
4. Remove two screws (C) each side of the base then remove the Base.
5. Remove the screw (D) and remove the Antenna Clip.
6. Remove two screws (E) and remove the Wire Clip.
Remove two screws (F) from the Heat Sink then remove the Clip (A).
7. Remove two screws (G) from the deck front bracket and remove two screws (H) from the deck rear bracket
cabinet.
8. Remove two screws (I) from under the bottom cabinet and remove the Deck Front Bracket.
Remove two screws (J) from under the bottom cabinet then remove the Deck and the Deck Rear Bracket.
9. Remove two screws (K) from the heat sink then remove the Main Board.
10. Remove two screws (L) from the heat sink then remove the Heat Sink and the Bottom Cabinet.
3
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DISASSEMBLY DIAGRAM
4
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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, 288kHz)
Signal output FM 1mV
MW 5 mV
LW 5 mV
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
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BLOCK DIAGRAM
6
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ALIGNMENT LOCATIONS
FM/AM TUNER
7
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ALIGNMENT PROCEDURES
FM ADJUSTMENT
Equipment Required
l AM IF/RF signal generator
l Solid-state voltmeter (SSVM)
l Regulated DC power supply
l 2-CH voltmeter
l 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 than30 dB
FM SNC 98.1 MHz
Adjustment Dev. 75 kHz Stereo Separation
L+R=90 % 98.1 MHz 98.1 MHz VR2 25 dB (! 5 dB)
Int. 1 kHz @ 40 dB