Harman kardon hd 7400 service manual

Page 1

The Harman Kardon
Model HD7400
COMPACT DISC PLAYER

Manual 152A

T

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27:

harmen/kardon

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Identify the models as follows.

a : International model Black version
gm : Australia model Black version

The following marks iound in the pans list of this manual

on : Norlh America area model Black version

harman/kardon

240 Crossways Park West, Woodbury. N. Y 11797
1112-3152152A5 P-1189081500 Printed in Japan

MVLOH

Page 2

HD7400

CLASS 1 LASER PRODUCT

Product complies with DHHS rules CFR subchapter J part

1040:10 at date of manufacture.

DANGER-invisible laser radiation when open and inter
lock failed or defeated. Avoid direct exposure to the

beam.

CAUTION-use of all controls. adjustments or perform-
ance of procedures other than those specified herein may

result in hazardous radiation exposure.

Be Careful of the Laser Pickup

Although you cannot see it from the outside, a laser
pickup is located under the disc tray and a precision lens
is built in it.

Since the laser pickup, including the lens element, is
especially sensitive to dust, keep the disc tray closed
when not in use. Also do not put your hand inside the
unit.

CLASS 1

LASER PRODUCT

SPECIFICATION

System : Compact Disc Digital Audio
Signal Detection : a-Beam Semiconductor Laser
Error Correction :6ch System

Sampling Frequency : 176.4kHz

Quantization : ta~bit Linear

Channels :2 Channel Stereo

Frequency Response : 4Hz-20kHz toads

Total Harmonic Distortion : 0.008% (1kHz)
Dynamic Range : 96dB
Signal-to-Noise Ratio 2 100dB
Channel Separation : 88:13 (1 kHz)
Wow it Flutter : Immeasurable

Adjustment of this unit requires tollowing measuring
Instruments and Jigs.

I Oscilloscope (3 or more modes, 100MHz, input Select Dc
range) 1740A

I Test Disc;:ElAJ CD-1

I Distortion Meter 339A

Line Output Level/Load
Impedance
Power Supply
USA. and Canada models :AC 120V. 60Hz
International model :AC 220/240V. 50/60Hz
Power Consumption : 15 Watts
Dimensions (WxHxD) : 17-3/3" x 4" x 13"
(443 x 103 x 330 mm)
Weight : 11Ibs. (5kg)

: 2.0Vl10k Ohms

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