Onkyo C 30 Service Manual

Page 1

C-30

Ref. No, 3432

ONKYO® SERVICE MANUAL

COMPACT DISC PLAYER

Black and Silver models

MD. MDN. BHMI). BHMDIN

MODEL C-30

MP, MPV. MIPF. BHMP. BHMPV. BHVIPI

MW. BHMW

MQA. BHMQA

SAFETY-RELATED COMPONENT WARNING

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

MAKE LEAKAGE-CURRENT 0R RESISTANCE MEAV
SUREMENTS TO DETERMINE THAT EXPOSED PARTS
ARE ACCEPTABLY INSULATED FROM THE SUPPLY
CIRCUIT BEFORE RETURNING THE APPLIANCE TO
THE CUSTOMER.

WYO;
t Allllll] flflMPflIIIIlIS.

SPECIFICATIONS

Signal readout system
Reading rotation

120V AC 60Hz

130V .i( SOHz

120 120V AC. 50 ()0H2

240V /\( . SDHZ

Optical non-contact
About 500~200 r.p.m.
(Constant linear velocity)

Linear velocity: |.2~l,4m/5

Error correction system. Cross interleave readsolomon code
D/A converter: I bit PWM

Sampling frequency: 352 SkHz (8 times oversampling)
Number of channels: 2 (Stereo)

Frequency response. 5Hz~20kH2

Total harmonic distortion: 0.005% (at lkHz)

Dynamic range. 96dB

Signal to noise ratio: 96dB

Channel separation"
Wow and Flutter:
Power consumption:
Output level.
Dimensions [WX H X D):

Weight:

90dB (at IkHZ)

Below threshold or measurabtlity
9 Watts

2 volts r.m.sl

275X85><307mm
(I0-IS/l6"X3-3/8">< lZ-I/I6")
3.4kg. 7.51m.

Specifications are subject to change without notice.

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0-30

TABLE OF CONTENTS

Specifications ....................................... 1
Note on compact disc ................................. 2
Service procedures ................................... 2
Caution on replacement of optical pickup ............. 3

Protection of eyes from laser beam during serv1cing..4

Laser warning labels ................................. 4
llechanisneexploded view .............................. 5
Removement of disc troy .............................. 7

Chassis-exploded View ............................

Parts list .................

IC block diagram and description ................... .,10
Block diagram ...................................... 17
Adjustment procedures ............................... 18
Printed circuit board view. ..20
Printed circuit board parts list .................... 22
Schematic diagram .................................. 23
Troubleshooting guide ............................... 27
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 ofthe disc with
the rainbow" reflecrion is the side containing the audio
information.

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

C 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
along period of time.

Not this wall

SERVICE PROCEDURES

1. S afety-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.
SpecificationszMore than lOMohm at 500V

2 Voltage Selector (B ack panel)
Worldwide models are equipped with a voltage selector
to conform with local power suppliesBe sure to set
this switch to match the voltage of the power supply
in users area before turning the power switch on.
Volmge 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.

W] m]

<-><-

ZZOV ~ 120V ~ 220V N 120V ~
at ACIZOV at ACZZOV

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 player's power switch on for about one
hour to remove all moisture.