Onkyo DX 710 Service Manual

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Ref. NO. 3444

ONKYOS SERVICE MANUAL

COMPACT DISC PLAYER
MODEL DX-71O

Black and Silver models

lBl-lMW
*BHMQA

SAFETY-RELATED COMPONENT WARNINGI!

COMPONENTS IDENTIFIED BY MARK A ON THE
SCHEMATIC DIAGRAM AND IN THE PARTS LIST ARE
CRITICAL FOR RISK OF FlRE AND ELECTRIC SHOCK.
REPLACE THESE COMPONENTS WITH ONKYO PARTS
WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS
MANUAL.

MAKE LEAKAGE-CURRENT OR RESISTANCE MEA-
SUREMENTS TO DETERMINE THAT EXPOSED PARTS
ARE ACCEPTABLY INSULATED FROM THE SUPPLY
CIRCUIT BEFORE RETURNING THE APPLIANCE TO
THE CUSTOMER.

HNKY.
.lllllln cuMPlllltllls.

BIIMD,BIIMDN,[}jIMDC '120V AC, 60Hz
_BIIMI,BIIMPF,MP,MPF 230V AC, 50112

120/220V AC, 50/60Ilz
240V AC,50HZ

SPECIFICATIONS
Signal readout system: Optical non-contact
Reading rotation: About 500~200 r.p.m.
(constant linear velocity)
Linear velocity: 1.2~1.4m/S
Error correction system: Cross interleave reedsolomon code
D/A converter: 1 bit PWM/Accu Pulse D/A converter
Sampling frequency: 352.8kHz (8 times oversampling)
Number of channels: 2 (Stereo)
Frequency response: 5Hz~20kHz
Total harmonic distortion: 0.004% (at lkHz)
Dynamic range: 96dB
Signal to noise ratio: lOOdB
Channel separation: 90dB (at lkHz)
Wow and Flutter: Below threshold of measurability
Power consumption: 12 watts
Output level: 2 volts r.m.s.

Dimensions (WXHXD): 455x110x305mm
18"X4-3/8"X12
Weight: 4.9kg. 10.81bs.

Specifications are subject to change without notice.

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TABLE OF CONTENTS

Specifications ooeeeoooooaooooooooooooco oooooooooooo 0001
Service procedures oceocoooeoooeeeeooooo ............ oooz
Note on COCPGCt disc eoceeooocooooooooco ...... 0000000002
Caution of replacement of optical pickup --------- .....3

Protection of eyes fro. laser bean during servicing °°°4

Laser 'arning label cocoo...coco.00000000000000.00000004
Iechanis. exploded view ..... ............... . .......... 5
Exnloded viev 0000000000000... ............... .o. ..... ..8
Parts list .............................. ...... ........9
[0 block diagrams and descriptions °° ---------------- ~10
Adjustgent procedures ... oooooooo cocoa... ooooooooooooo 18
Printed circuit board viev ........................... 21
PC board-parts list ..... ............ . .......... ......22
Sche-atic diagra. ..... . ...... ea.0.000000000000000000023
Troubleshooting guide ......... ......... .............. 27
Block diagral ..... .. ..................... ..29
Packing view ......................................... 30

NOTE ON COMPACT DISC

0 Holding Compact Discs
Hold Compact Discs by the edges so that you do not touch

the surface of disc. Remember that the side of the disc with
the rainbow" reflection is the side containing the audio
information.

Do not attach tape or paper to the label side of the disc
and always be careful not to leave fingerprints on the side
that is played.

0 Storing Compact Discs

Store Compact Discs in a location protected from direct
sunlight, high heat and humidity and extremely high
and low temperatures. Discs should never be left in the
trunk or interior of an automobile in the sun since the
temperature can become very high in such a closed environ-
ment.

Always store Compact Discs in the holders in which they
were sold. Never leave a disc in the players disc holder for
a long period of time.

Nor this wav

SERVICE PROCEDURES

1. Safety-check out
After correcting the original service problem,perfonn
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.
SpecificationszMore than lOMohm at 500V.

2. V oltage Selector (B ack panel)
Worldwide models are equipped with a voltage selector
to conform with local power supplies.Be sure to set
this switch to match the voltage of the power supply
in user's area before turning the power switch on.
Voltage is changed by sliding the groove in the switch
with a screw driver to the right or left.
Confirm that the switch has been moved all the way to
the right or left before turning the power switch on.

220V ~ 120V ~
at ACIZOV

220V ~ 120V ~
at AC220V

0 Cleaning Compact Discs

Before playing a disc wipe off the playing surface with a
soft cloth to remove dust and other soil. Wipe the surface
in straight lines from the center of the disc outward, not
in a circular motion as you would with a phonograph
record.

Do not use benzene, chemical cleansers or phonograph
record cleaning solutions to clean Compact Discs. Also
avoid static electricity prevention solutions since they can
damage the surface of Compact Discs.

Problems Caused by Dew
Dew can form inside a Compact player when it is brought
from a cold environment into a warm room, when a room

is rapidly heated and if a player is left in a humid environ-
ment.

This dew can prevent the laser pickup from reading the
data contained in the pits in the disc surface. If the player
does not operate properly because of dew, remove the disc
and leave the players power switch on for about one
hour to remove all moisture.