Hitachi DA 50 Service Manual

Page 1

©HITACHI

.SERVICE MANUAL

TY

No. 591 EGF'

DA-4O
DA-50

(cs, ES, zs, KS )

as, sA, 5w, vs

(cs, es, zs, KS >
as, SA, aw, vs

CAUTION
( DANGER

Invisible laser radiation when open and interlocks failed or defeated. AVOID DIRECT EXPOSURE TO BEAM. J

GEFAHR
( Unsichtbare Laser-Strahlung wenn Interlock (Blockiarung) funktionsuntiichtig odor abgeschaltet. I
UNMITTELBAREN KONTAKT MIT DEM STRAHL UNBEDIGT VEHMEIDEN.
DANGER
Fairs trés attemion aux radiations 6min: par la faisceau laser invisible au défaillance du verrouillage.
NE JAMAIS S'EXPOSER DIRECTEMENT AU FAISCEAU.
VARNING
Nir apparatan fippnats och skyddsanordningen felar eller sans ur funktion ffirekommer osynlig laserstrélning. UNDVIK
DIREKT BESTRALNING.
ADVARSEL
Nér apparatet Ebnes og beskynelsesanordningen ikke virker eller sane: un af funktion, forekommer der usynlig
Insemrfiling. UNDGA DIREKTE BESTRALING.

[ ADVARSEL

Nfir denne delen er fipen som felge av at Iésen er utkoplet eIIer ikke fungerer, eksisterer det usynlig Iaserstrélsng.
UNNGAA BLI UTSATT FOR DIREKTE BESTRALING!

/ VAnonus
MASTA ALTTIIKSI SATEILYLLE.

Laito Ifihottéé nfikymitfinté lasersiiteilyfi, kun se avataan ja kun siséiset turvalukot eivfit toimi. VARO JOUTUJ

CONTENTS

SPECIFICATIONS""
MAINTENANCE ~-
SERVICE POINTS ~~
ADJUSTING THE PLAVER ~-
DESCRIPTION OF NEW PARTS
TROUBLESHOOTING -----------
REPLACEMENT PARTS LIST
EXPLODED VIEW ----------
PRINTED WIRING BOARD
CIRCUIT DIAGRAM
BLOCK DIAGRAM

INHALTSVERZEICHNIS

TECHNISCHE DATEN ..
WARTUNG .............
WARTUNGSPUNKTEu
EINSTELLUNG DES GERATES
BESCHREIBUNG DER NEUEN
TEILE -
STORUNGSSUCHE
ERSATZTEILLISTE
EXPLOSIONSZEICHUNG --
PRINTPLATTEN
SCHALTPLAN
BLOCKSCHEMA

TABLE DES MATIERS

FICHE TECHNIQUE
ENTRETIEN ...........
POINTS DE SERVICE ~-

REGLAGE DU LECTEUR DE

DISQUE .......................................... 11
DESCRIPTION DES NOUVELLEI
PIECES-
EN CAS DE DIFFICULT -
TABLEAU DES PIECES ~
VUE ECLATTE
PLAN DE BASE-~-
PLAN DE CIRCUIT
SCHEMA ...............

SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT.

COMPACT DISC PLAYER

July 1988

YO KOHAMA WORKS

Page 2

DA-40/DA-50

Notices de precautions dempIoi du laser
DANG ER

Invisible laser radia-
tion when open and
inter lock failed or

For U.S.A.
Fijr U.S,A.
Pour les Etats Unis

defeated.

AVOID DIRECT EX-

POSURE TD BEAM. For Canada
CAUTION: HAZARDOUS LASER Fur Kanada

Pour le Canada

1-62.11
©__ 41. illlIi-i-
©© a i

AND ELECTROMAGNETIC RADIA-
TIDN WHEN OPEN AND INTEHLOCK
DEFEATED.

ATTENTION: RAYONNEMENT
LASER ET ELECTROMAGNETIOUE
DANEEREAUX SI ouvem AVED
L'ENCLENCHEMENT DE SECURITE
ANNULE.

--

CAUTION~INVISIBLE LASER
RADIATION WHEN OPEN

AND INTERLOCKS FAILED OR
DEFEATED AVOID DlRECT
EXPOSURE TO BEAM.

AVOID EXPOSUREALASER For Europe and Australia, etc.

RADIATION l5 EMITTED
FROM THIS APERTURE

Ft'ir Europa und Australien usw.
Pour lEurope et lAUStralie,etc.

The caution labels on laser usage l Warnettiketten zum Gebrauch des Lasers »

For Sweden Denmark Norway,
Finland and Switzerland.

Ffir Schweden, Danemark, Norwegen,

Finnland und Schwelz.

Pour Suede, Danemark, Norvege,
Finlande et Suisse.

IIIVAISIL usnus usmuluns itn
inns Ili sinrnrosnmum n
in IT ruutiou. urinal unmmst
m mime

For Europe and Australia etc,
Fijr Europa und Australian usw.
Pour I'Europe et l'AustraIie,etc.

LASER PRODUCT

r SAFETY PRECAUTIONS

The following precautions should be observed when semicing.

critical pans in the power Circuit block should not be replaced with other makers.
Critical pans are marked with A in the circuit diagram and printed wiring board

Iy sale to operate without danger of electrical shock.

AUDIO

Number oichannels 2

Frequency response 5-20.000Hz +0.5, -2.0dB
Dynamicrange 85d8 (IHF A)

Signal-tortoise ratio 88dB (lHF A)

Harmon ic distortion 0 005% (at (HA Harmonic
distortion up to the 10th harmonics}
90 dB (at 1kHzl

Less than measurable limits
($000196 W. peak)

Power consumption
Dimensions

Weight

Functions

Separation
Wow/flu tter

Outout voltage 2V

DISCS USED Compact Disc
Diameter 120mm/80mm
SIGNAL FORMAT

Samplingirequencv 44.1 kHz

16 bit linear/channel
4.3218 Mb/sec

Quantization number
Transmission bit rate
PICKUP

System

Object lens drive system
Optical source
Wavelength

GENER AL

Power requirements

Dis Ia
Object lens drive system optical pick-up AcgEgsomEs
2dimensional parallel drive
Semiconductor.laser
780 nm

AC 120V 60 Hz ( CSi

"ZZOV 50 Hz (ES, VS, KS, ZSl
~240V 50 Hz (SA, BS)

~ HOV-120V] ~200V -- 220V,
~230V - 240V EO/GOHZ lEWl

Specifications and design may be changed without notice for improvement.

1. Since many pans in the unit have specral safety related characteristics. always use genume Hitachi's replacement parts. Especially

2 Belore returning a repaired unit to the customer, the service technician must thoroughly test the unit to ascertain that it is complete-

l2W
370(W) X 74.5IH) X 274(D) mm
2.9kg

FUNCTIONS AND DISPLAYS

Random Play

Random Memory Search System

Direct Search System

Skip Search System

Manual Search

Repeat Playback

High-Speed Access

Track Number Indicators

Index Search

Can be used with Wireless Remote Controller
Auto Space Function

Track Number, Playing Time Indicators
8/12 cm CD Compatibility

Track number indicators

Connecting pin cord