Harman kardon hd 7450 service manual

Page 2

HD7450

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CLASS 1 LASER PRODUCT Be Careful of the Laser Pickup
Product complies with DHHS rules CFR subchapterJ part Although you cannot see it from the outside, a laser
1040:") at date of manufacture. pickup is located under the disc tray and a precision lens
is built in it.
DANGER-invisible laser radiation when open and inter Since the laser pickup, including the lens element, is
lock failed or deieated. Avoid direct exposure to the especially sensitive to dust, keep the disc tray closed
beam. when not in use. Also do not put your hand inside the
unit.
CAUflON-use of all controls, adjustments or perform-
ance of procedures other than those specified herein may
result in hazardous radiation exposure.
ADVARSEL:
Usynlig laserstraling ved abning nar
sikkerhedsafbrydere er ude at funktion. Undga
CLASS 1 udsettelse for straling.
LASER PRODUCT
VAROITUS!
Laite sisaltaa laserdiodin. joka lahetta'a nakymétonta
silmille vearallista lasersateilyé.
SPECIFICATION
System : Compact Disc Digital Audio Power Supply
D/A Convener : Linear, Pulse Width U.S.A. and Canada models :ACIEOV, (-3on
Modulated BitStream, International model :A0220/240V, 50/60Hz
Clock Rate: 33.8658MH2 Japan model :Acwov, 50/60Hz
(33.868.8KHZ) Power Consumption : iSWatts
Signal Detection : a-Beam Semiconductor Dimensions : 17-3! " x 4" x 14"
Optical Laser Pickup 443mm x 103mm x 356 mm
Error Correction :CIFIC System Weight : 11.5Ibs./5.2kg

Low Level Linearity : +/-1.DdB @-90da
Frequency Response :4Hz to 20kHz +0dB/-1.5dB
Total Harmonic Distortion (THD) :0.003%

Dynamic Range : 97:15
Signal to Noise Ratio : loadB
Channel Separation : QadB

Line Output Level/Impedance : 2.0V @ 10kt)

Adlustment of this unit requires following measuring
Instruments and llgs.

O Oscilloscope (3 or more modes, 100MHz, input Select DC
range) 1740A
0 Test Disc: EIAJ CD-1

Specifications and components subject to change without notice.
Overall performance will be maintained or improved.