Yamaha cdx 480

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COMPACT DISC PLAYER

CDX-48O

SERVICE MANUAL

WM minute Manama (Jan

wifiLF l rn

distributors Service Division.

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WARNING: Failure to follow appropriate service and safety procedures when servicing this product may result in personal !
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YAMAHA Retailer or the appointed service representative.

IMPORTANT: The presentation or sale of this manual to any individual or firm does not constitute authorization. certification or
recognition of any applicable technical capabilities, or establish I principle-agent relationship of any far-mt

departments of YAMAHA are continually striving to improve YAMAHA products. Modifications are, therefore. inevitable and
specifications are subject to change without notice or obligation to retrofit, Should any discrepancy appear to exist, please contact the

WARNING: Static discharges can destroy expensive components, Discharge any static electricity your body may have
accumulated by grounding yourself to the ground bars in the unit (heavy gauge black wires connect to this bass)

1 The data provided is believed to be accurate and applicable to the unit(s) indicated on the cover. The reserch, engineering. and service
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IMPORTANT: Turn the unit OFF during disassembly and pans replacement. Recheck all work before you apply power to the unit

IMPORTANT NOTICE \

1 This manual has been provided for the use of authorized YAMAHA Retailers and their service personnel,
It has been assumed that basic service procedures inherant to the industry. and more specifically YAMAHA Products. are already
known and understood by the users. and have therefore not been restated

injury. destruction of expensive components and failure of the product to perform as specified For these reasons.
we advise all YAMAHA product owners that all service required should be performed by an authorized

I CONTENTS

TO SERVICE PERSONNEL ....................................... 1~2
REAR PANELS...
SPECIFICATIONS .
MEMORY BACKUP
INTERNAL VIEW
DISASSEMBLY PROCEDURES .
STANDARD OPERATION CHART
TEST MODE ..........
ERROR MESSAGE ,.

DISPLAY DATA ...................

BLOCK DIAGRAM ...........

PRINTED CIRCUIT BOARD

TEST POINT WAVEFCRMS

IC DATA ........................ . ......

IC BLOCK .................
SCHEMATIC DIAGRAM

PARTS LIST .......................................

REMOTE CONTROL TRANSMITTER

YAMAHA CORPOIZATION
P.o.aox1,Hamamatsu.Japan

(WEEK-013 ll: 6) Printed in Japan 943

OSV'XCIO

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COX-480

CDX-480

I TO SERVICE PERSONNEL

1. Critical Components Information. AC LEAKAGE
Components having special characteristics are marked and WALL EQUIPMENT TESTER OR
must be replaced with pans having specifications equal to OUTLET UNDER TEST EQUIVALENT
those originally installed.

2, Leakage Current Measurement (For 120V Models Only). ® :3-

When service has been completed. it is imperative to verify
that all exposed conductive surtaces are properly insulated -_-
trom supply circuits. INSULATlNG

TABLE

0 Meter impedance should be equivalent to 1500 ohm shunted
by 0.15uF.

e Leakage current must not exceed 0.5mA.

0 Be sure to test for leakage with the AC plug in both
polarities.

CAUTION: USE OF CONTROLS OR ADJUSTMENTS OR PERFORMANCE OF PROCEDURES OTHER THAN THOSE
SPECIFIED HEREIN MAY RESULT IN HAZARDOUS RADIATION EXPOSURE.

THE COMPACT DISC PLAYER SHOULD NOT BE ADJUSTED OR REPAIRED BY ANYONE EXCEPT PROPERLY
QUALIFIED SERVICE PERSONNEL.

PROTECTION OF EYES FROM LASER BEAM DURING SERVICING

This set employs a laser. Therefore, be sure to carefully
follow the instructions below when servicing .

1. Laser Diode Properties 2. When checking the laser diode emission, keep your
0 Material : GaAIAs eyes more than 30 cm away from the objective lens.
0 Wavelength : 780 nm
0 Emission Duration : Continuous
0 Laser Output : max. 44.6 uW'

* This output is the value measured at a distance of
about 200 mm from the objective lens surface on
the Optical Pick-up Block.

WARNING: CHEMICAL CONTENT NOTICE!

The solder used in the production of this product contains LEAD. In addition, other electrical/electronic
and/or plastic (where applicable) components may also contain traces of chemicals found by the
California Health and Welfare Agency (and possibly other entities) to cause cancer and/or birth defects
or other reproductive harm.

DO NOT PLACE SOLDER, ELECTRICAL/ELECTRONIC OR PLASTIC COMPONENTS IN YOUR MOUTH
FOR ANY REASON WHATSOEVER!

Avoid prolonged, unprotected contact between solder and your skin! When soldering, do not inhale
solder fumes or expose eyes to solder/flux vapor!

If you come in contact with solder or components located inside the enclosure of this product, wash your
hands before handling food.