Table Of Contents; Specifications - Harman Kardon HD7725 Technical Manual

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 interlock failed
or defeated. Avoid direct exposure to the beam.
CAUTION - use of all controls, adjustments or perfonmance of
Procedures other than those specified herein may result in
hazardous radiation exposure.
CLASS 1
LASER PRODUCT
Be careful of the Laser Pickup.
Although you cannot sée 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 lense element,
is especially sensitive to dust, keep the disc tray
closed when not in use. Also do not put your hand
inside the unit.
ADVARSEL:
Usynlig laserstraling ved abning nar sikkerhedsafbrydere er
ude af funktion. Undga udsettelse for straling.
VAROITUS!
Laite sisaltéa laserdiodin, joka lahettaéa nakymaténta silmille
vaarallista lasersateilya.
CONTENTS
SPECIFICATIONS eon Wa hd We a ee ed nd GF Bee SOY 1 CIRCUIT DESCRIPTION i Kae oe be Fh Be os ood AL 19
SAFETY PRECAUTIONS. ......-. +... 00+ sere eee 2 GENERAL UNIT (EXPLODED VIEW).............. 23
AC LEAKAGE TEST ......... 00s sees veer eee eens 2 CD MECHANISM (EXPLODED VIEW) ...........-. 25
ELECTROSTATICALLY SENSITIVE DEVICES....... 3 GENERAL PARTS LIST......cccccecccccceeucees 26
CONTROLS AND FUNCTIONS ......... 0s essere 4 CD MECHANISM PARTS LIST..............00005 27
REMOTE CONTROL «1. sess eee e eee teen eran 5 ELECTRICAL PARTS LIST ........0...00ee cece 28
DISASSEMBLY PROCEDURES............-...005 6 IC DIAGRAMS.............................0.. aa
POWER CORD REPLACEMENT ............0.000 7 P.C. BOARDS .... oc ccccccecccceueecceceecenee 38
ADJUSTMENT PROCEDURE..................005 8 WIRING DIAGRAM........2.ceccccecccceecvevus 40
TROUBLESHOOTING .........-.- 0 02sec ee eens 10 SCHEMATIC DIAGRAM...........sceeee sense een 44
IC FUNCTIONS ......00 000. c ccc cseeeeceeeeeees 14
SPECIFICATIONS
Nominal Limit
System : Compact Disc Digital Audio
D/A Converter : Dual 18 Bit Linear D/A Converters, 8Fs Digital Filter, RLS
(Real-time Linear Smoothing)
Signal Detection
Error Correction
Low Level Linearity
CIRC System
Frequency Response 0dB
(20Hz to 20kHz)
Total Harmonic Distortion (THD) 0.0025%
Dynamic Range 98dB
Signal to Noise Ratio 104dB
Channel Separation 98dB
Line Output Level/Impedance 2.0V
Digital Output Level/Impedance
Coaxial 0.5Vp-p
Optical -15dBm
Power Supply
U.S.A. and Canada models
International, Australia and
Asia/Oceania models
AC120v, 60Hz
: 3-Beam Semiconductor Optical Laser Pickup
+/-0.50B @-90d0B
+0.5dB
0.006%
293dB
2100dB
290dB
2.0V +0.5V @ 10kQ
0.5Vp-p +0.1Vp-p @75Q
-15dBm +3dBm
AG230/240V, 50/60Hz
443mm x 103mm x 326mm
Power Consumption 22 Watis
Dimensions 173/a" x 4" x 13"
Weight 18.9lbs/8.6kg
Specifications and components subject to change without notice. Overall performance will be maintained or improved.