Yamaha cdc 635

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COMPACT DISC PLAYER

CDC-635/95/96

SERVICE MANUAL

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

WARNING: Failure to follow appropriate service and safety procedures when servicing this product
may result in personal injury, destruction of expensive componmls, and failure of the
product to perform as specified For these reasons, we advise all YAMAHA product owners
that any service required should be 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 ml constitute
authorization. ceniftcation or recognition o[ any applicable technical captbilitier, or
establish a principle-agent relationship of any form.

The data provided is believed It) be accurate and applicable to the unit(s) indicated on the covert The research,

engineering. and service depanments or YAMAHA are continually striving to improve YAMAHA products.

Modifications are. therefore inevitable and specifications are subject to change without notice or obligation to

rclrofilr Should any discrepancy appear to exist, please Conlltct the distributor's Service Division,

WARNING: Static discharges can destroy expensive components. Discharge any static elemicity your
body may have accumulated 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 part replacement Recheck all work belore you
apply power to the unit.

IMPORTANT NOTICE \

I CONTENTS

TO SERVICE PERSONNEL ....... 1~2
REAR PANELS
FRONT PANELS..
SPECIFICATIONS
INTERNAL VIEW .
DISASSEMBLY PROCEDURES .
BLOCK DIAGRAM
ADJUSTMENTS
TEST MODE
STANDARD OPERATION CHART

.3
4
4

10~15

17~18

ERROR MESSAGES .................... .................19~23
DISPLAY DATA
IC DATA ........

WAVEFORM OF TEST POINT.
PRINTED CIRCUIT BOARD ..
IC BLOCK
SCHEMATIC DIAGRAM . ...36
PARTS LIST .................. 37-48
REMOTE CONTROL TRANSMITTER............r,.............49

YA

YAMAHA CORPORATION
P.O.Box1 rHamarIatquaoan

3.15K-593 fl 6) Printed in japan 93r1

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CDC-635I95I96

I TO SERVICE PERSONNEL

1. Critical Components Information. WALL EQUIPMENT TESREEARKASE
Components having special characteristics are marked and
must be replaced with parts having specifications equal to OUTLET UNDER TEST EQUIVALENT

those originally installed. Q) E

2. Leakage Current Measurement (For 120V Models Only). f-
When service has been completed, it is imperative to verify
that all exposed conductive surtaces are properly insulated INSULATING '-
from supply circuits. 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.