Yamaha cdc 91

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COMPACT DISC PLAYER

CDC-625/90/91

SER E MANUAL

/ IMPORTANT NOTICE \

This manual has been provided for the use of authorized YAMAHA Retailers and their serviw personnel.
It has been assumed that basic service procedures inherent to the industry, and more specifically YAMAHA
Products, are already known and undemtood 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, destrucu'on 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 perfumed by an authorized YAMAHA Retailer or the
appointed service representative

IMPORTANT: The premution 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 relatiunship of any form.

The data provided is believed to be accurate and applicable to the unit(s) indicated an the cover. The research,

engineering, and service departmmts of YAMAHA Ire continually striving to improve YAMAHA products.

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

WARNING:

I CONTENTS

TO SERVICE PERSONNEL
FRONT PANELS .
REAR PANELS
SPECIFICATIONS

INTERNAL VIEW .....

BLOCK DIAGRAM.. .
DISASSEMBLY PROCEDURES .8~9
ADJUSTMENTS .. 10~16
DISPLAY DATA .. ....... 16
TEST MODE .................................................................. 17

retrofit. Should any discrepancy appear to exist, please contact the distributoz's Service Division

Static discharges can desmy expensive cunpmentsr Discharge any static electricity your
body may have accumulated by grounding yourself to the ground bus: in the unit (heavy
gauge black wires connect to this buss).

IMPORTANT: Tum the unit OFF during disassembly and part replacemenL Roch/wk all work before you

\ apply power to the unit. j

STANDARD OPERATION CHART
ERROR MESSAGES
IC DATA ....................
WAVEFORM OF TEST POINT
PRINTED CIRCUIT BOARD
SCHEMATIC DIAGRAM .....
OPERATING CONFIRMATION

TROUBLESHOOTING
PARTS LIST ..................
REMOTE CONTROL TRANSMITTER ....................... 53

Y MAHA

YAMAHA CORPORATION
P.O.Box1,Hamamatsu,Japan

3.2K-924 [fl 6) Printed in Japan 92.1

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CDC-62 5/90/9 1

I TO SERVICE PERSONNEL

1. Critical Components Information. WALL EQUIPMENT TESITEEIRKASE
Components having special characteristics are marked and
must be replaced with parts having specifications equal to OUTLET UNDER TEST EQUIVALENT
those originally installed. ® I:
2. Leakage Cunent Measurement (For 120V Models Only). ' I
When service has been completed, it is imperative to verify
that all exposed conductive surfaces are properly insulated INSULATING - ,
from supply circuits.
- Meter impedance should be equivalent to 1500 ohm shunted
by 0-15iF- . POLARIZATlON (u, c models)
. Leakage current must not exceed 0 5m A This CD player product is equipped with a polanzed altemat-
' ' ing-current line plug (a plug having one blade wider than the
0 Be sure to test for leakage with the AC plug in both other) This plug will fit into the power outlet only one way.
polarities. This is a safety feature.

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 pW

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.

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CDC-62 5/90/9 1

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Pin No. Pin Name l/O Function
1 CV | VCO control voltage input
2 RV External terminal for stabilizing capacitor of adjusting V00
3 VDD 45V power terminal (for V00)
4 IT EST IN l+ LSI test terminal (normally disconnected)
5 IT EST E |+ LSI test terminal (normally disconnected)
6 SYEQ 0 Signal output for checking synchronous agreement
7 DSY O Synchronous signal output for checking EFM demodulation signal
8 CKN O VCO clock output (Opposite phase)
9 CK O VCO clock output [4.3218MH1 (average)/8.6436MH2 (average) for double speed reproduction]
in IEXVCO l+ VCO select
11 ICDROM I+ Interpolation prohibition control input (L" : interpolation prohibited)
12 18/16 |+ Digital filter output selection (H : 18 bit, L' : 16 bit)
13 8x/4x I+ Digital filter selection (H : B-times, L" : 4vtimes)
14 IMUTE I+ Sound mute control input ("L : mite)
15 DOWN I+ Digital attenuator volume down pulse input
16 UP |+ Digital attenuator volume up pulse input
17 CiFLG 0 Signal output for checking correction of C1 error
18 DEP O Desemphasis control signal output
19 O4 0 System clock output (4,2336MH2)
20 /FCST OD Focus search start signal output
21 16M/33M l Master clock input selection (H" : 384fs, L" : 768fs)
22 NO/DB 1 Audio reproduction selection (H" : Standard reproduction, L" : Double speed reproduction Only
16M/33M = L' is effective.)
23 ClF 0 Digital audio interface signal output
24 $00 0 Audio data output Serial data
25 SDI | Digital filter input
26 SDSY 0 Audio data output L/R clock .
27 DTFLG 0 Audio data output Data incorrectable flag
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