Onkyo DXC 310 Service Manual

Page 1

DX-C310

REF.N0. 3373
ONKYOE SERVICE MANUAL
COMPACT DISC AUTOMATIC CHANGER
UD, UDN 1209146, BENZ
UU 110/120/220/240V AC, 50/60HZ
UQA 240V AC, 50H:
SAFETY-RELATED COMPONENT WARNING}!
SPECIFICATIONS
COMPONENTS IDENTIFIED BY MARK A ON THE . .
SCHEMATIC DIAGRAM AND IN THE PARTS LIST ARE 59 rem"? 56" 0PM "0°°a°
CRITICAL FOR RISK OF FIRE AND ELECTRIC SHOCK. 1de mm 0 500720 Pm;
REPLACE THESE COMPONENTS WITH ONKYO PARTS _ _ (jsa "6 VB'OC'W)
WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS 3 loaf-V3 1-"L4m5
MANUAL. Error correction system: Cross interleave rcadsolomon code
Decoded bits: 18 bits linear
MAKE LEAKAGE-CURRENT OR RESISTANCE MEA» Sampling chqucncy: 352,8kHz (eighbtimes oversampling)
SUREMENTS To DETERMINE THAT EXPOSED PARTS Number 0 Cmmncls: 2 (C-'60)
ARE ACCEPTABLY INSULATED FROM THE SUPPLY Frequency Port . SHZTZORHZ
CIRCUIT BEFORE RETURNING THE APPLIANCE TO Total harmonic dlstomon: 0.004% (at lkHZ)
THE CUSTOMER. Dynamic range: 92MB
Signal to noise ratio: lOSdB
Channel separation: lOOdB (at lkHz)
Wow and Flutter; Below threshold of measurabilily
Power comsumption: 13 watts
Output level: 2 volts Lm.s,

Dimensions (WXHXD): 435x119><36lmm
17-1/8><4- 2 l3" X14~1/4"
Weight: 58kg, 12.8 lbs

Specifications are subject IO Change without noticeI

i ONKYO
IAIIIIIII BflMPIIIIfIIIS

Page 2

DX-C310

TABLE OF CONTENTS

Specifications .........
Service procedures .
Microprocessor descriptions .
IC block diagram and descriptions ..
Adjustment procedures ................................... 1
Pc board view from bottom side
Main circuit
Headphone amplifier
Remocon sensor ......
Power supply circuit .
Display circuit
Schematic diagram .
Pc board-parts list ..
Mechanism~parts list
Mechanism-exploded View ,
Exploded view .......
Parts list ...............
Waveform of each section
Block diagram .................
Caution on replacement of pickup
Protection of eyes from laser beam
during servicing .. .
Laser warning lable
Packing View ..

.33

SERVICE PROCEDURES

1. Safety-check out

After correcting the original service problem, perform the
following safety check before releasing the set to the
customer:

Connect the insulating-resistance tester between the plug
of power supply cable and chassis.

Specifications: more than 10Mohm at 500V.

2. Voltage selector (rear panel)

Worldwide models are equipped with a voltage selector to
conform with local power supplies. Be sure to set this selector
to match the voltage of the power supply in your area before
turning the power switch on. Voltage is changed by turning
the voltage selector with a screwdriver or similar instrument
to the 110V. l20V. 220V or 240V position. Confirm that the
selector has been set to the correct position before turning
the power switch on. If there is no voltage selector switch on
the unit you have purchased. it can only be used in areas
where the power supply voltage is the same as that ofthe unit.

at AC 110V at AC 120V at AC 220V at AC 240V

3. Procedures for replacement of flat packaged [Cs
1. Tools to be used:
(1) Soldering iron Grounded soldering iron or
soldering iron with leak re-
sistance of 10 Mohms or

more.

Form of soldering irons tip:

(2) Magnifying glass . . . for checking of finished

works

(3) Tweezers ........ for handling of IC and
forming of leads

(4) Grounding ring. . . . Countermeasure for electro-
static breakdown

(5) Nipper ......... for removing defective IC

(6) Small brush ...... for application of flux

(7) Enamel line

2. Work Procedures:
(1) Remove the defective lC
Cut all leads of the defective 1C one by one using
a nipper and remove the IC.
1. An enamel line has been pierced between the legs
of the flat package IC.
2. Use a soldering iron to unsolder the legs one at
a time.
3. Repeat the procedure of 1 and 2 above for the 3
sides only.

X

While holding the soldering against the enamel line,
pull in the direction of the arrow.

(2) Clean the pattern surface of the PC board.
Get rid of the remaining leads and solder,

(3) Check and from the leads of the new flat pack-
aged IC to be installed.
From every lead on the new [C using a pair of
tweezers, so that all of them are aligned neatly
without being risen, twisted or inclined toward
one side. Especially the rising portion of every
lead must be formed with greatest care.

ic g tC g i K: E/
(Rismg) (Twisting) llncliningl