Harman kardon hd 740 service manual

Page 1

The harman kardon

Model HD 740

Manual A

COMPACT DISC PLAYER

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harman kardon em Nfl

230V ...........
CONTENTS
SPECIFICATIONS .................................................. 2
SAFETY PRECAUTIONS ........................................ 3
CONTROLS AND FUNCTIONS ...................... 5
DISASSEMBLY PROCEDURES .............................. 9
POWER CORD REPLACEMENT ............................. 9
TROUBLE SHOOTING ----------
IC TERMINAL FUNCTIONS .................................. 15
CIRCUIT DESCRIPTION ------------------
lC BLOCK DIAGRAMS .......................................... 31

..... for EUR

REMOTE CONTROL SCHEMATIC DIAGRAM ------- 35
ELECTRICAL PARTS LIST .................................. 35
FUNCTIONAL BLOCK DIAGRAM ------------------------ 4O
WIRING DIAGRAM ..................... 1' ....................... 41
SCHEMATIC DIAGRAM ................. .

PC_ BOARDS ..................................................... 46
EXPLODED VIEW ................................................ 47
CD MECHANISM EXPLODED VIEW -------------------- 48
PACKING DRAWING ........................................... 49

barman/kardon

Parts and Service Office

250 Crossways Park Dr. Woodbury. NY. 11797
1112-HD720 0998 Printed In JAPAN
CEC6P20068540

Page 2

HD 740

Be Careful ot the Laser Pickup
(gusss 1 LASER RRODDHUg l C h \ Although you cannot see it from the outside. a laser pickup is
n; $82802: lezwrih rues FR Sch apter J located under the disc tray and a precision lens is built in it.
pa ' 3 ate 0 menu acture. Since the laser pickup, including the lens element, is
. . . . especially sensitive to dust, keep the disc tray closed when
DANGER -invrsrbie laser radiation when opened and . . . .
t . Al 0 do d de th .
interlock tiled or defeated. Avoid direct exposure to the no In use 5 not put your han "5' e n"

beam.

CAUTION - use of all controls, performance oi
procedures other than those specified herein may result

m hazardous radiation exposure CAUTION - INVlSiBLE LAEER RADIATION WHEN OPEN AND
INTERLOCKS DEFEAYED. AVOID EXPOSUHE TO BEAM,
VOHSICNT r UNSICHTBARE LASEHSYRAHLUNG vnm aus.
WENN DEGKEL GEOFFNET UND WENN
sicweHHElrsvsaaneELuNe Deenafiucm 1er
may" DEM SWAN. AussErzEN I
VARNING - ostLII: usERSTMLNIMe NAR DENNA DEL
An OPPNAD OCH SPAR: An \IHKOPPLAD.

STRALEN AR FARLIG.

ADVARSEL- USYNLIG usensvnlune VED AeNlNe. NAR
erxERHEDsAFem/Dens an up: AF FuuKnON.
UNDGA UDSETYELSE FOR STRALING.

VARO r AVATTAESSA .rA SUOJALUKITUS omrrAEesA
oLEr AerINA NAKVMAYTOMALLE LASEfiSATEILYLLE.
ALA KATSO SATEESEEN '

CLASS I LASER PRODUCT
KLASSE I LASER PHODUKT

LUOKAN iLASERLAiTE
KLASS 1 LASER APPARAT

K /

SPECIFICATIONS

System : Compact disc Digital Audio Channel Separation : 9808
DIA Convener : 20-bit: Line Output Level/Impedance : 2V 10m
Signal Detection : s-Beam Semiconductor Digital Output Level/Impedance ; 0.5v p-p 750
Optical Laser Pickup (Coaxial)
Error Correction : ClFlC System Power Supply
Low Level Lineanty : t1dB(1 KHzl-QOGB) lntemational model : ACESOV,50H2
Frequency Response : 8Hz-20KHz 11GB Power Consumption : 12W
Total Harmonic Dislortion(THD) 20.0057. Dimensions(WxHxD) 2 17.3' X 12.7' X 4.3'
Dynamic Range : 9MB 440mm X 323mm X 1 10mm
Signal to Noise Ratio : 106dB Weight : 4.5k919.9lbs

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