Integra cdc 3 1 service manual

Page 1

Integral SERVICE MANUAL

CDC-3.1

Ref. No. 3661 W
Bums:

COMPACT DISC CHANGER
MODEL CDC-3.1

* may:

fl 0

Black model

BMD

120V AC, 6OHZ

SAFETY-RELATED COMPONENT WARNING

COMPONENTS IDENTIFIED BY MARK (it ON
THE SCHEMATIC DIAGRAM AND IN THE PARTS
LIST ARE CRITICAL FOR RISK OF FIRE AND
ELECTRIC SHOCK. REPLACE THESE COM-
PONENTS WITH ONKYO PARTS WHOSE PARTS
NUMBERS APPEAR AS SHOWN IN THIS MANUAL,

MAKE LEAKAGE-CURRENT OR RESISTANCE
MEASUREMENTS TO DETERMINE THAT
EXPOSED PARTS ARE ACCEPTABLY IN-
SULATED FROM THE SUPPLY CIRCUIT BEFORE
RETURNING THE APPLIANCE TO THE
CUSTOMER.

TABLE OF CONTENTS

Service procedure/ Caution on replacement

of optical pick up / Specifications ....................... 2
Laser warning lanel .........................
IC block diagram and descriptions .
Microprocessor connection diagram ..
Microprocessor terminal description .
Care should be taken with the

optical pickup ................................................... 10
Trouble shooting ...... ..
Initializing operation ..
Error message displayed in heat-running mode.14

Block diagram ..15
Chassis exploded view ..17
Parts list .................... ..19

Pick-up drive unit View .20
Printed circuit parts list .r 21
Printed circuit board View from bullom side ..... 23
Schematic diagram
Adjustment procedurers
Packing View

Page 2

CDC-3.1

SPECIFICATIONS

Signal readout system:
Reading rotation:

Linear velocity:
Error correction system:

D/A converter:
Sampling frequency:
Number of channel:
Frequency response:

Total harmonic distortion:

Dynamic range:
Signal to noise ratio:
Channel separation:
Wow and Flutter:
Output level:

Power consumption:
Power supply :

Dimensions (W x H x D):

Weight:

Optical noncontact
About 500 - 200 r.p.m.
(constant linear velocity)

1.2 » 1.4 m/s

Cross lnterleave Reed-Rolomon
code

1 bit PWM/ACCUPULSE
352.8 kHz (8 times oversampling)
2 (stereo)

5 Hz - 20kHz

0.005% (at 1kHz)

96 dB

92 dB

92 dB (at IkHz)

Below threshold of measurability
2 volts r.m.s.

10 watts

120V, 60Hz

230V, 50Hz

435 x131 x433 mm
(17-1/8 x 5-3/16" x17<1/16
6.9 kg (15.2 lbs.)

Specifications and features are subject to change wuthout

notice.

SERVICE PROCEDURES

1. Safety-check out

After correcting the original service problemperform

- the following safety check before releasing the set

to the customer.

Connect the insulating-resistance tester between the
plug of power supply cord and chassis.
SpeciriufionszMu'e than lOMohm at 500V.

CAUTION ON REPLACEMENT OF OPTICAL PICKUP

The law diode in the optical pickup block is so
sensitive to static electricitysurge current and etc.

During repairmlnlley take the following precautions.
(The following precautions are included in the service

that the components are liable to be broken down pans.)

or its reliability remarkably deteriorated

PRECAUTIONS

1.Ground for the work-desk 3.6rounding for the human body.

Plaeeaoondtmtive sheet such as a sheet oieopper
(with inpedance lower than 10mm on the work-
deskandplaeethesetontheconduotivesheetso
that the chassis.

2.6munding for the test equipment and tools
Test equipments and tooling; should be grounded
in order that their ground level is the same the
ground of the power source.

Be sure to put on a wrist-strap for grounding whose
other end is grounded
Be particularly careful when the workers wear
synthetic fiber clothes. or air is dry.

4.Select a soldering iron that permits no leakage and
have the tip ofthe iron well-grounded.

5.130 not check the laser diode terminals with the
probe of a circuit tester or oscilloscope.