Onkyo DXC 300 Service Manual

Page 1

DX-C300

SERIAL NO. 3348

ONKYO@ SERVICE MANUAL

COMPACT DISC AUTOMATIC CHANGER
MODEL DX-C300

UDIUDN 120v Ac. 60m.
LUU 1 10/120/220/240v AC, 50/60Hz j

- P T WARNING
SAFETY RELATED COM ONEN SPECIFICATIONS

COMPONENTS IDENTIFIED 3v MARK A ON THE ,. _
SCHEMATIC DIAGRAM AND IN THE PARTS LIST ARE 59 340" We Optical noflrcontact

CRITICAL FOR RISK OF FIRE AND ELECTRIC SHOCK. Reading "aim? About 500720 MW}-
REPLACE THESE COMPONENTS WITH ONKYO PARTS (mnsam near 6109
WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS We 105. Tl-4m
MANUAL. Error correction system; Cross interleave readsolomon code
Decoded bits: 16 bits linear
MAKE LEAKAGECURRENT OR RESISTANCE MEA- Sampling frequency: 352.8kHz (eight-times oversampling)
SUREMENTS TO DETERMINE THAT EXPOSED PARTS Numb" 01 channel 2 (mm)
ARE ACCEPTABLY INSULATED FROM THE SUPPLY Frequency response: 5HZ~20kHZ
CIRCUIT BEFORE RETURNING THE APPLIANCE TO Total harmonic distortion: 0.004% (at 1kHz)
THE CUSTOMER, Dynamic range: 98dB
Signal to noise ratio: 103dB
Channel separation: 100dB (at lkHz)
Wow and Flutter: Below threshold of measurability
Power comsumption: 13 watts
Output level: 2 volts rrm.s.

Dimensions (WXHXD): 435xll9><361mm
17-1/8><4» 2/3 X 14-1/4
Weight: 5.8kg 12.8 lbs.

ONKYO l
Mllllll BBMPIINENISJ

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CAUTION ON REPLACEMENT OF PICK-UP

The laser diode in the optical pick-up block is so sensitive During repair, carefulley take the following precautions.
to static electricity, surge current and etc. that the com- (The following precautions are included in the service
ponents are liable to be broken down or its reliability parts),

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 impedance lower than 106(1) on the work- other end is grounded.
desk and place the set on the conductive sheet so Be particularly careful 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 toolings 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.

LD terminals

(Care should be taken with the optical pickup.)

The optical pickup is sensitive to static electricity. surge

currents, and other high electrical noise, and because

there is the possibility of damage to performance, in the
handling of the pickup, the utmost care must be taken,
particularly with regard to static electricity.

1. When replacing the optical pickup, first short the LD
terminals and remove the connector. Also, when
ataching the new optical pickup, after attaching the
connector, unsolder the LD terminals.

2, Do not touch the optical pickup object lens with the
hands.

PROTECTION OF EYES FROM LASER BEAM DURING SERVICING

This set employs a laser. Therefore, he sure to follow LuerDiodelroperties
carefully the instructions below when servicing. . Material GaAS/GaAIAs

o Wavelen th: 780nm
WARNING" o Emissio: Duration: continuous
WHEN SERVICING, DO NOT APPROACH THE LASER 0 Laser output: max. 0.5mW
EXIT WITH THE EYE TOO CLOSELY. IN CASE IT IS This output is the value measured at a distance
NECESSARY TO CONFIRM LASER BEAM EMMISION. about 1.8mm from the objective lens surface
BE SURE TO OBSERVE FROM A DISTANCE OF MORE on the Optical Pickup Block.

THAN 300m FROM THE SURFACE OF THE OBJECTIVE
LENS ON THE OPTICAL PICKUP BLOCK.

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