Yamaha cdc 901

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. COMPACT DISC PLAYER
CDC-655ICDC-901
CDC-555ICDC-501

SERVICE MANUAL

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IMPORTANT NOTICE

This manual has been provided for the use of authorized YAMAHA Retailers and their service personnel.
it has been assumed that basic service procedures inherent to the industry, 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 components. 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 not constitute authoriza-
tion. certification or recognition of any applicable technical capabilities, or establish a
principle-agent relationship of any form.

The 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 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 distributor's Service Division.

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

IMPORTANT: Turn the unit OFF during disassembly and pan replacement. Recheck all work before you apply

] power to the unit.

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I CONTENTS
TO SERVICE PERSONNEL .1~2 DISPLAY DATA .....................
FRONT PANELS .. ...3 BLOCK DIAGRAM ................ 20~21
REAR PANELS . ...4 CDC-655/CDC-901 PRINTED CIRCUIT BOARD ..22~25
SPECIFICATIONS ...5 IC BLOCK .. ............................. 26
INTERNAL VIEW ..... 5 TEST POINT WAVEFORMS . ...... . ..........

DISASSEMBLY PROCEDURES ..
STANDARD OPERATION CHART.
TEST MODE ..
ERROR MESSAGES
lC DATA ...................

CDC-655lCDC-901 SCHEMATIC DIAGRAM ..
CDC-555/CDC-501 SCHEMATIC DIAGRAM .. ..
CDC-555/CDC-501 PRINTED CIRCUIT BOARD ..30~33
PARTS LIST .. ............. 34~48
REMOTE CONTROL TRANSMITTER ................... 49~50

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YAMAHA CORPORATION
P.O.Box1 .Hamamatsu,Japan

1311-063 Ifi]@ Printed in Japan '9543

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CDC-65SICDC-901[CDC-555ICDC-501

I TO SERVICE PERSONNEL

1. Critical Components Information. WALL EQUIPMENT TESIT'ERKASIE
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Components aving specia c aracteristice are mar ed and OUTLET UNDER TEST EQUIVALENT

must be Ieplaoed with parts having specifications equal to

those originally installed. ® I:
2. Leakage Current Measurement (For 120V Models Only). I

When service has been completed, it is imperative to verify

that all exposed conductive surfaces are properly insulated "

from supply circuits. laid-EATING

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 MW

* 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 0R PLASTIC COMPONENTS IN YOUR MOUTH
FOR ANY REASON WHATSOEVER!

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CDCaSSS/CDC4501

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.