akira MC-VCM2 Manuel utilisateur
COMPACT DISC PLAYER
Service Manual
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Model No.: MC-VCM2
Version: 1.0
MODEL:
MC-VCM2
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Model No.: MC-VCM2
Version: 1.0
CONTENTS
IMPORTANT SAFETY NOTES ............................................................................................................. 5
SPECIFICATION..................................................................................................................................... 7
ELECTRICAL SPECIFICATION............................................................................................................ 8
EXPLODED VIEW................................................................................................................................ 14
PART LIST ............................................................................................................................................. 15
TROUBLESHOOTING GUIDE............................................................................................................ 17
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Model No.: MC-VCM2
Version: 1.0
1. IMPORTANT SAFETY NOTES
Avoid installing the unit in locations described below.
• Places exposed to direct sunlight or close to heat radiating appliances such as electric heaters.
• Places lacking ventilation or dusty.
• Places subjected to constant vibration.
• Humid or moist places.
This product utilizes a laser.
Danger - Invisible laser radiation is present when unit is opened and interlock failed or defeated.
Caution - Use of the controls or adjustments of procedures other than those specified herein may result
in hazardous radiation.
THE LASER COMPACT DISC PLAYER FUNCTIONS BY HELP OF INVISIBLE LASER LIGHT
AND IS EQUIPPED WITH SAFETY SWITCHES TO AVOID EXPOSURE WHEN DOOR IS OPEN
AND SAFETY INTERLOCKS ARE DEFEATED. IT IS DANGEROUS TO DEFEAT OR BYPASS
SAFETY SWITCHES.
DANGEROUS VOLTAGE
Uninsulated dangerous voltage, that may be of sufficient magnitude to constitute a risk of
electric shock to persons is present within this product’s enclosure.
ATTENTION
The owner’s manual contains important operating and maintenance instructions. For
your safety, it is necessary to refer to the manual.
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Model No.: MC-VCM2
Version: 1.0
Dripping warning: The product shall not be exposed to dripping or splashing and that no objects filled
with liquids, such as vases, shall be placed on the product.
Ventilation warning: The normal ventilation of the product shall not be impeded for intended use.
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Model No.: MC-VCM2
Version: 1.0
2. SPECIFICATION
CD PROGRAMABLE TRACKS 20 TRACKS
(EUROPE) 522-1620 KHz (9 KHz per step)
AM FREQUENCY RANGE (U.S.A.) 520-1720 KHz (10 KHz per step)
(Europe) 87.5-108.0 MHz (0.05 MHz per step)
FM frequency range (U.S.A.) 87.5-107.9 MHz (0.2 MHz per step)
(AM) 10 channels
Radio station memory (FM) 10 channels
(Europe) 230V 50Hz
Power supply (Main unit) (U.S.A.) 120V 60Hz
(Remote control) 2 x 1.5V (UM-3) batteries
Max power output 10 W
Operation Temperature 1-40 C (32-104 F)
(Main unit) (WxHxD) 218 x 290 x 120mm
Dimensions (Speaker) (Each) (WxHxD)180 x 290 x 120mm
Weight (Approximate) 6.25 kg (not including packing material)
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Model No.: MC-VCM2
Version: 1.0
3. ELECTRICAL SPECIFICATION
POWER SUPPLY 230V/50HZ
TEST CONDION: a. Receiver input test signal:
• FM 22.5KHZ deviation with 1000 HZ through 75 OHM dummy
antenna.
• AM 30% modulation with 400 HZ through loop antenna.
b. Electrical equalizer switch set “FLAT” position, bass booster switch set to
off position.
c. Speaker output impedance 4 OHM (headphone output impedance 32 OHM).
d. Reference output power: 500mW.
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Model No.: MC-VCM2
Version: 1.0
FM SECTION
Item Unit Nominal Limit
Low end MHZ 87.5 +/-0.2
Frequency range High end MHZ 108.0 +/-0.2
90MHZ dBu 18 26
98MHZ dBu 18 26
Usable sensitivity for S/N 30dB
106MHZ dBu 18 26
Distortion (mono) (1000uv input) 98MHZ % 1 2
S/N ration (mono) (1000uv deviation 75KHZ input) 98MHZ dB 55 50
Max output power (1000uv DEV 75KHZ input) 98MHZ W 10 9
-3dB limiting (1000uv input) 98MHZ dBu 12 16
Image rejection ratio 106MHZ dB 18
Intermediate frequency rejection 90MHZ dB 40
Spurious rejection 106MHZ dB >=50
Selectivity (+/-300KHZ EUR) 98MHZ dB 35
Overload distortion (DEV 75KHZ 100mv input) 98MHZ % 2 5
AM suppression (modulation 30%) 98MHZ dB 30 25
Audio response -6dB 98MHZ HZ 20-4500 20-4000
L-R dB 22 16
100HZ R-L dB 22 16
L-R dB 23 17
1KHZ R-L dB 23 17
L-R dB 22 16
Stereo separation
(pilot modulation 10%)
98MHZ 1000vU input
10KHZ R-L dB 22 16
Distortion (stereo 1000uV input) L/R % 2 3
Stereo indication deviation sensitivity 98MHZ KHZ >2-<=5
90MHZ dBu 26 34
98MHZ dBu 26 34
Auto scan sensitivity
106MHZ dBu 26 34
Stereo indication sensitivity 98MHZ dBu 18 26
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Model No.: MC-VCM2
Version: 1.0
AM SECTION
Item Unit Nominal Limit
522 +/-5
Frequency range KHZ 1620 +/-5
603KHZ dB/m 54
999KHZ dB/m 54
Maximum sensitivity
1404KHZ dB/m 54
603KHZ dB/m 54 60
999KHZ dB/m 54 60
Usable sensitivity for 20dB S/N
1404KHZ dB/m 54 60
3 5T.H.Distortion
30% modulation 5mv/m input
80% modulation 100mv/m input
999KHZ %
4 7
Signal to noise ratio (5mv/m input) 999KHZ dB 38 30
Intermediate frequency rejection 603KHZ dB 45 40
Image rejection 1404KHZ dB 36 28
AGC -10dB (100mv/m input) 999KHZ dB 40 35
Selectivity +/-9KHZ (EUR) 999KHZ dB 20 15
Band width –6dB 999KHZ KHZ 4-12
2xIF % 4 10Whistle modulation
1/5/100mv/m input 3xIF % 4 10
Audio fidelity –6dB (5mv/m input) 999KHZ HZ 20-2400 20-2200
603KHZ dB/m 50 60
999KHZ dB/m 50 60
Auto scan sensitivity
1404KHZ dB/m 50 60
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Model No.: MC-VCM2
Version: 1.0
CD SECTION
Item Unit Nominal Limit
T.H.D (1KHZ) –10dB JIA A Filter TCD-781 % 0.1 0.3
Maximum output power TCD-781 W 10
Channel separation TCD-781 dB 65 55
DE-Emphasis error TCD-781 dB 0.2 0.5
Interruption SBC-444A mm 0.8 0.6
Black dot SBC-444A mm 0.8 0.6
Finger prints SBC-444A TNO19 TNO18
Frequency response +/-3dB TCD-781 HZ 20-20000
Signal to noise ratio (JIA A Filter) TCD-781 dB 70 60
Channel unbalance TCD-781 dB 2
Linearity error (40dB) SBC429 dB 2
Max Vol TCD-781 mV <20
Residual hum & noise Min Vol TCD-781 mV <3
Minimum VOL hum & noise
1KHZ 0dB
TCD-781 mV 2 4
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