Onkyo DXC 120 Service Manual

Page 1

DX-C120/DX-C220/DX-C320

ONKYO SERVICE MANUAL
COMPACT DISC PLAYER

MODEL DX-C120 MODEL DX-C220

MODEL DX-C320

BMD, BMDN 120V AC, 60Hz
BMP 280V AC, 50Hz
only DX-C220 120/220V AC, 50/60Hz

SAFETY-RELATED COMPONENT WARNING SPEC I Fl CATIO NS

COMPONENTS IDENTIFIED BY MARK A ON Compact Disc Automatic Changer Model DX-C320/C220/C120
THE SCHEMATIC DIAGRAM AND IN THE PARTS Signal ado! SYStemi 0911031 fln'mmafl
LIST ARE CRITICAL FOR RISK OF FIRE AND Reading rotation: About 500 - 200 r.p,m.
ELECTRIC SHOCK. REPLACE THESE COM. , , 03mm 9" WWW)
PONENTS WITH ONKYO PARTS WHOSE PART £22315:sz system~ Crissllitzrllseave Reed Solomon code
NUMBERS APPEAR AS SHOWN HJ THIS MANUAL D/A converter: 1 bit PWM/ACCUPULSE
MAKE LE AKAGE-CURRENT 0R RESISTANCE Sampling frequency: 352.8 kHz (8 times oversampling)
MEASUREMENTS TO DETERMINE THAT Number of channels: 2 (stereo)
EXPOSED PARTS ARE ACCEPTABLY IN- Frequency 51mm ZHZ - 20
SULATED FROM THE SUPPLY CHICUIT BEFORE Total harmonic distortion: 0.004% (at lkHz)
RETURNING THE APPLIANCE TO THE 9mm ""33: . 96
CUSTOMER. Signal to norse ratio: 96dB

Channel separation: 90dB (at lkHz)

Wow and Flutter: Below threshold of measurability

Output level: 2 volts r.m.st

Power consumption: 13 watts

Power supply rating: European and Australian models:

AC 230V. 50Hz
USA and Canadian models:
AC 120V. 60Hz

0 Worldwide model:
NKYO
0 Dimensions (W x H x D): 455 X 120 x 425 mm
(17-15/16" x 4-3/4" x 16-11/16")
u cuflpuufms Weight: 7.4 kg (16.3 lbs)

Specifications and external appearance are subject to change
without notice because of product improvements.

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DX-C120/DX-C220/DX-0320

TABLE OF CONTENTS

Specifications ................................

Service procedures .

SERVICE PROCEDURES

1. Safety~check out
After correcting the original service problem,perfonn

Caution on replacement of optical pickup..

Protection of eyes from laser beam ......... ID me customer:

Connect the insulating-resistance tester between the
plug of power supply cord and chassis.
Specifications:More than lOMohm at 500V.
2. V oltage Selector (B ack panel)
Worldwide models are equipped with a voltage selector
to confirm with local power supplies.Be sure to set

1
2
"2 the following safety check before releasing the set
3
3

Laser warning labels ............................

lC block diagrams and descriptions ..................

Packing view ...................

Pick-up drive unit
Chassis-exploded View ........................................ 13

Parts list ..................................... 15

BI k d ............................... 17 . .
00 gram this swnch to match the voltage of the power supply
Adjustment procedures ....................................... 19 . , . .
_ d _ _ b d _ f be d 21 in users area before turning the power swrtch on.
Erintel Circuit board View lrom ttom 51 e ......... 23 Voltage is changed by sliding the vein the switch
- - ' t ........................... . . .
mm mm 0 pans 15 With a screw dnver to the nght or left.
Control position and names ................................. 27

Confirm that the switch has been moved all the way to
the right or left before turning the power switch on.

CID CID
4- L» 4- L,
220v ~r 120v ~ 220v ~ 120v ~
at actzov at ACZZOV

CAUTION ON REPLACEMENT OF OPTICAL PICK UP

The laser diode in the optical pickup block is so During repair,carefulley take the following precautions.
sensitive to static electricitysurge current and etc. (The following precautions are included in the service
that the components are liable to be broken down parts.)

or its reliability remarkably deteriorated.

PRECAUTIONS

1.Ground for the work-desk. 3.Grounding for the human body.
Place a conductive sheet such as a sheet of copper Be sure to put on a wrist-strap for grounding whose
(with inpedance lower than lOMfl) on the work- other end is grounded.
desk and place the set on the conductive sheet so Be particularly mreful when the workers wear
that the chassis. synthetic fiber clothes, or air is dry.
2.Grounding for the test equipment and tools. 4.Select a soldering iron that permits no leakage and
Test equipments and tooling; should be grounded have the tip of the iron well-grounded.
in order that their ground level is the same the 5.Do not check the laser diode terminals with the .
ground of the power source. probe of a circuit tester or oscilloscope.