Onkyo DX 7310 Service Manual

Page 1

DX-731O

Ref: No. OM3507

ONKYO® SERVICE MANUAL

COMPACT DISC PLAYER
MODEL DX-7310

Black modal
BMP 230V AC, SUI-[z
BMW 120/220V AC, 50/60Hz

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 PARTS NUMBERS APPEAR AS SHOWN IN THIS
MANUAL.

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

ONKYO
Alllllll BflMPIINENIS

SPECIFICATIONS

Compact Disc Player
Signal readout system:
Reading rotation:

Linear velocity:
Error correction system:
D/A converter:

Sampling frequency:

Number of channels:
Frequency response:
Total harmonic distortion:
Dynamic range:

Signal to noise ratio:
Channel separation:
Wow and Flutter:

Output level:

Headphone jack:

Power consumption:
Power supply rating:

Dimensions (W x H x D):

Weight:

Model DX-73l0

Optical non-contact

About 500 » 200 rpm.

(constant linear velocity)

1.2 - I.4 m/s

Cross Interleave ReedASolomon code

l bit PWM ACCUPULSE DA

CONVERTER

352.8 kHz (Eithimes

oversampling)

2 (stereo)

5 Hz » 20 kHz

0.004 % (at 1 kHz)

96 dB

100 dB

90 dB (at 1 kHz)

Below threshold of measurali 1in

2 volts r.rn.sr

I

Optimum load impedance

8 to 200 ohms

13 watts

European and Australian mdels:
AC 230 V, 50 Hz

USA and Canadian models:
AC 120 V, 60 Hz

Worldwide model:
AC 120 V and AC 220V
switchable, 50/60 Hz

455 x120 x 308 mm

(l7-IS/16 X 4-3/ " x 12-1/5")

4.8 kg, 10.6 lbs.

Specifications and external appearance are subject to chnge

without notice because of product improvements.

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TABLE OF CONTENTS
Specifications . . . . . . . . . . 1
Service procedures - 2
Caution on replacement of optical pickup 2
Protection of eyes from laser been: during servicing ' 3
Laser warming labels . . . . . . . . . . . 3
Exploded View . . . . . . . . . . . 4
Parts 51 . . . . . e . . . . . - . . . . . s
Mechanism exploded view- - - ~ - ' ~ - 6
Drive unit exploded View ' ' 7
Fans list . . c . . . . . 7
Microprocessor connection diagram' 8
Microprocessor terminal description- 9

1C block diagram and description - - 10~ 13
Dissembling procedm'e ' ' - - ' r ' - r - 14
Schematic diagram mechanism block - r - - . - 15
Block diagram . . . . . . . . . . . l . . '16
Adjustment procedure ' ' ' ' ' ' 17,18
Primed circuit board view frm bottom side ~ . - - 19,20
Schematic diagram . . . . . . . . . . . . .2132
Printed circuit board parts list - ~ - . ' ~ . . .23'24
Packing view . o . . . . . . . . . c . . . 25

CAUTION ON REPLACEMENT

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

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 insulatingresistance tester between the
plug of power supply cord and chassis.
SpecificationsMore than lOMohm at 500V.

2. V oltage Selector (B ack panel)

Worldwide models are equipped with a voltage selector
to conform with local power supplies.Be sure to set
this switch to match the voltage of the power supply
in user's area before turning the power switch on.
Voltage 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.

[[1] EIT
_. L» 4 >

220V ~ 120V * 220V ~ 120V V
at AC12OV at AC220V

OF OPTICAL PICKUP

During repair,carcfulley take the following precautions.
(The following precautions are included in the service
parts.)

1.Ground for the work-desk.
Place a conductive sheet such as a sheet of copper
(with inpedance lower than 10MB.) on the work-
desk and place the set on the conductive sheet so
that the chassis.

2.Grounding for the test equipment and tools.
Test equipments and toolings 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 grounding whose
other end is grounded.
Be particularly careful when the workers wear
synthetic fiber clothes, or air is dry.

4.8elect a soldering iron that permits no leakage and
have the tip of the iron well-grounded.

S.Do not check the laser diode terminals with the
probe of a circuit tester or oscilloscope.

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