Hitachi DA 1000 R Service Manual

Page 1

TY No. 361 E

DA- 'IOOOR

@ HITACHI
G SERVICE MANUAL

Revised version

* This Service Manual applies to DA-1000 whose circuitry has been changed.

* R" is marked on the rear panel of the modified unit.

* For servicing units other than those given in this Service Manual, refer to the former Manual (No. 348 E-l).

A
There is a "R malt on the
rear pmel.
A
DANGER~lnvisible laser radiation when open.
AVOID DIRECT EXPOSURE TO BEAM.
SAFETY PRECAUTION \
The followung precautions should be observed when servicing,
I. Since many pans In the unlt have special safety related characteristics, always use genuine Hitachi's replacement
A parts. EspeCIally crrtlcal parts In the power circuit block should not be replaced With those of other makers

Crmcal parts are marked with A In the schematic diagram and circuit board diagram.

2. Before returning a repaired unit to the customer, the service technICIan must thoroughly test the unit to ascertain
\ that It IS completely safe to operate WlIhOUI danger of eieCIrlCai shock.
(CONTENTS \

SPECIFICATIONS... PROCEDURES FOR REPLACEMENT OF

SERVICE POINTS... FLAT PACKAGED le ..

ADJUSTING THE PLAYER .. TROUBLE SHOOTING

EXPLANATION OF THE NEW PARTS. EXPLODED VIEW

GLOSSARIES ......................................... BLOCK DIAGRAM..

MECHANISM SERVICING WIRING DIAGRAM....

PRECAUTIONS ..................................... PRINTED WIRING BOARD.. 46
EXPLANATION OF UNIT MECHANISM. CIRCUIT DIAGRAM ...... 47
EXPLODED VIEW SIGNAL WAVEFORMS 56

(UNIT MECHANISM ASSEMBLY) WIRE LAYOUT DIAGRAM .. .. 57

\REPLACEMENT PARTS LIST.... j
A

SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT.

COMPACT DISC PLAYER

April 1983 TOYOKAWA WORKS

Page 2

HITACHI DA-1000 R

SPECIFICATIONS

AUDIO

Number of channels
Frequency response
Dynamic range
Signal-to-noise ratio
Harmonic distortion

2

5 - 20,000 HZ :05 dB
93 dB

94 dB

0.003%

GENERAL
Power requirements

Power consumption

AC 120V 60 Hz, ~ 220V 50
Hz

~ 240V 50 Hz,
~120/220/24OV 50, 60 Hz
25W (AC 120V 60 Hz.

Separation 92 dB (at 1 kHz) ~220V 50 Hz. 240V 50 Hz)
Wow/flutter Less than measurable limits 28W (~ 120/220 240V 50.
(Crystal accuracy) 60 H2)
Output voltage 2.1 Vrms (with full scale) Dimensions 320 (W) x 1451Hl>< 234 (D)
mm
DISCS USED Weight 5.6 kg
Playing time 60 minutes/one side
Diameter 120 mm FUNKTIONS AND DISPLAYS
Functions Random memory search
SIGNALFORMAT (max. 15 tracks)
Sampling frequency 44.1 kHz Self-program search System
Quantization number l6»bit linear/channel Skip play, memory stop.
Transmission bit rate 4,3218 Mb/sec pause, repeat, Output xozume
Displays Play posrtion (S-rmr. steps),
PICK-UP number of tracks, eta-mg
System Object lens drive system opti~ track number, elapsed play
cal pick-up time, output volume EVEl
Object lens drive system2-dimensional parallel drive Others Variable level headphone
Optical source Semiconductor laser jack, 2 sets output terminals
Wavelength 790 mm (variable and fixed leven
ACCESSORIES Connecting pin cords
Check that exposed parts are acceptably insulated )
from the supply circuit before returning the instru- INSTRUMENT t
ment repaired to the customer, (Rear plate)
0 Checking method Input termlnal
. (outside)
Power swrtch IS set to ON.
Next, measure the resistance value between the \
both poles of attachement cup (Power supply
plug) and the input terminal (outside) of rear -0 o-
plate and check that the resistance value is 500

kohms or more,

Insulation tester