Yamaha cdx 393 mk2

Page 1

COMPACT DISC PLAYER

CDX-393MKII

SERVICE MANUAL

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IMPORTANT NOTICE

WARNING:

the distributor's Service Division

WARNING:

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.

Failure to follow appropriate service and safety procedures when servicing this product may result in personal
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 he performed by an authorized
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 a principle-agent relationship of any form.
file data provided is believed to be accurate and applicable to the unit(s) indicated on the cover, The research. engineering, and
service departments of YAMAHA are continually striving to improve YAMAIIA 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

Static discharges can destroy expensive components. Discharge any static electricity your body may have accumu-
lated by grounding yourself to the ground buss in the unit (heavy gauge black wires connect to this buss).

IMPORTANT: Turn the unit OFF during disassembly and parts replacement. Recheck all work betore you apply power to the unit,

I CONTENTS

TO SERVICE PERSONNEL ................................... . 1~2
REAR PANELS 3
SPECIFICATIONS ................. . ........................................ 4
INTERNAL VIEW ...................................................... 4
DISASSEMBLY PROCEDURES ................ 5

STANDARD OPERATION CHART . 6~7

TEST MODE . 7~8
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ERROR MESSAGE . 9~10
IC DATA ......... 11~14
BLOCK DIAGRAM .................................... .. 15
PRINTED CIRCUIT BOARD

SCHEMATIC DIAGRAM ............................

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

REMOTE CONTROL TRANSMITTER

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CDX-393MKII

C DX-393MKII

I TO SERVICE PERSONNEL

1. Critical Components Information.

. . . t AC LEAKAGE
Components haying specral characteristics are marked A WALL EQUIPMENT TESTER OR
and must be replaced with parts having specifications equal OUTLET UNDER TEST EQUIVALENT
to 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 surfaces are properly insulated -
from supply circuits. INSULATING
TABLE

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

o 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 : GaAlAs 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.