Onkyo DXC 140 Service Manual

Page 2

DX-C140/C340

TABLE OF CONTENTS

Specifications

Service procedures

Caution on replacement of optical pick-up
Protection 01 eyes trom laser beam during servicing
Laser warning label

IO block diagram and descriptions
Microprocessor connection diagram
Microprocessor terminal description

Care should be taken with the optical pickup
Adjustment procedure

Pick-up drive unit/part list

Trouble shooting

Initializing operation

Error message displayed in heat-running rnoce
Chassis exploded view pans list

Changer mechanism parts list

Chassis exploded view

Block diagram

Schematic diagram

Printed circuit board view from bottom side
Printed circuit pc board-parts list

Packing view/pans list

SERVICE PROCEDURES

; l. Safety-check out
2 After correcting the original service problem,perfonn
g the following safety check before releasing the set
4 m the customer:
3 Connect the insulating-resistance tester between the
10 plug of power supply cord and chassis.
1; Specificationssz than lOMohm at 500v.
1: 2. Voltage Selector (Back panel)
15 Worldwide models are equipped with a voltage selector
1; to confirm with local power supplierBe sure to set
19 this switch to match the voltage of the power supply
3; in user: areabelore turning the power switch on.
25 Voltage is changed by sliding the groove in the switch
29

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.

[ID on

4- -> 4 >

220V ~ ' 120V ~ 220V ~ 120V ~
at ACI 20V at ACZ'ZOV

CAUTION ON REPLACEMENT 0F OPTICAL PICK UP

The laser diode in the optical pickup block is so
sensitive to static electricitysurge current and etc,
that the components are liable to be broken down
or its reliability remarkably deteriorated.

PRECAUTIONS

During repaincarefulley take the following precautions.

(The following precautions ae included in the service
pans.)

LGround for the work-desk.
Placeacondmtivesheetsuchuasheetofcopper
(with inpedance lower than lOMO) on the work-
desk and place the set on the conductive sheet so

that the chassis.

2.0munding {or the test equipment and tools.

Test equipments and tooling; should be grounded
in order that their ground level is the same the
ground of the power source.

3.Grounding for the human body.
Be sure to put on a wrist-strap for grotmding whose
other end is grounded
Be particularly careful when the workers wear
synthetic fiber clothes. or air is dry.

4.Select a soldering iron that permits no leakage and
have the tip ofthe iron well-grounded.

5.Do notcheckthelaserdiodeterminalswiththe
probe of a circuit tester or oscilloscope.