Yamaha cdx 870

Page 1

COMPACT DISC PLAYER

CD - é

70/670

SERVICE MANUAL

/

WARNING:

This manual has been provided for the use of authorized YAMAHA Retailers and their service permnnel.
II has been assumed that hash: service procedures lnhcmnt to me indnslry and more specifically YAMAHA
Products. are already known and undeistood by the users, and have therefore not been rcslaled.

Failure to {allow appropriate service and safety prunedurci when servicing this product
may result in personal injury, deslruction of expensive components and failure of the
product In perform as specified. Forihese reasons, we advise all YAMAHA product owners
IhaI all service requited should be performed by an authorized YAMAHA Remiler or the
appointed service representative.

IMPORTANT: The presentation Or sale of this manual to any individual or firm does not constitute
athodzaiion, certification or recnguitiun of any applicable technical capabilities. or
esIabIIsh a principle»agenl relationship of any {om-L

IMPORTANT NOTICE \

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The data provided Is believed to be accurate and applicable ll) tin: unit(s) indicated an the coverr The Iescreh,
engineering. and service departments of YAMAHA am continually striving to improve YAMAHA producis.
Modificariuns are. therefore, inevitable and specifications are subject to change without norice or obligation to

WARNING:

IMPORTANT:

retrofit. Should any.discrepancy appear to exist. please contact Ihc distributors Service Division

Static discharges can destroy expensive components. Discharge any slalic electricity your
«Wynn have accumulated by grounding yourself to me ground buss in the unit (heavy
gauge black wires connect to this Inter),

um the unit OFF during disassembly and parts replacemeni, Recheck all work before you

apply power to the unit. /

I CONTENTS

To SERVICE PERSONNEL 1N2
INTERNAL VIEW
FRONT PANELS.
REAR PANELS
SPECIFICATIONS
DISASSEMBLY PROCEDURES.
BLOCK DIAGRAM
ADJUSTMENTS
TEST MODE
ERROR MESSAGE

1 00445

DISPLAY DATA 15
OPERATING CONFIRMATION TROUBLESHOOTING ..16~17
PRINTED CIRCUIT BOARD .18~21
WAVEFORM OF TEST POINT..
IC DATA
IC BLOCK
SCHEMATIC DIAGRAM
PARTS LIST
REMOTE CONTROL TRANSMITTER 43

-/ 'YAMAHA CORPORATION
v P.0.Boxi,Hamamamu,Japan

1.53K-875 HQ) Printed in Japan '933

Page 2

COX-870570

I TO SERVICE PERSONNEL

1. Critical Componems Information. AC LEAKAGE
Componenm having special characlsrislics are matked and WALL EQUIPMENT TESTER on
must be replaced wan pans having spacincmious aquaI Ia OUTLET UNDER TEST EQUIVALENT
[hose uriginally installed.

INSULATING
TABLE

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 empioys a laser. ThereIcIa, be sure to careiully
Iaikyw the instructions beiaw when servicing .

I. Laser Diode Properties
0 Material : GaAIAs
o Wavelength 1780 nm
0 Emission Duration : Coniinucus
c Laser Outpm : max. 44.6 BW'

7 This output Is the vaiue measuyed at a distance a! _
about 200 mm from Ihs objecfivs lens surface on
the Optical Pick-up Block.

2. When checking the laser diode emission, keep your
eyes move than 30 cm away from the abjecIive Isns.

(D G, 3 models

cuss 1 LAsEu unuuucv

(9 G. B modal:

-. -mu-um
:n-uuv-w mumm

w. m.m-wuu
Immmmm Mullllml-
uni-um

1...." u."....."mmi.m

CDX~E70I570

CDX-870
English

@THIS LABEL (SEE POSITION SHOWN IN THE ILLUSTRATION) INFORMS THE USER THAT THE APPARATUS
CONTAINS A LASER COMPONENT.

(3 THIS LABEL (SEE POSITION SHOWN IN THE ILLUSTRATION) WARNS THAT ANY FURTHER PROCEDURE WILL
BRING THE USER INTO EXPROSURE WITH THE LASER BEAM.

CAUTION 1 USE OF CONTROLS, ADJUSTMENTS OR PERFORMANCE OF PROCEDURES OTHER THAN THOSE
SPECIFIED HEREIN. MAY RESULT IN HAZARDOUS RADIATION EXPOSURE.

Swedish

(9 DENNA MARKNING (SE FIGUR) UPPLVSER OM A'IT DET I APPARATEN INGAR EN LASERKOMPONENT AV TYP
KLASS 1.

<2) VARNINGSMARKNING (SE FIGUR) FOR STRALNING. INGREPP I'APPARATEN BOR ENDAST FORETAGAS AV
FACKMAN MED KANNEDOM OM asap APPARATEN INNEHALLER EN LASERKOMPONENT SOM AVGER
STRALNING OVERSIIGANDE GRANSEN FOR LASERKLASS 1.

VARNING : OSYNLIG LASERSTFIALNING NAR DENNA DEL AR OPPNAD : BETHAKTA EJ STRALEN.

Danish

® DE'I'I'E MERKAT ER ANBRAGT $0M VIST I ILLUSTRATIONEN FOR AT ADVARE BRUGEREN OM AT A?-
PARATET INDEHOLDER EN LASERKOMPONENT.

<2 DET'IE MERKAT OM LASEREN ER ANBRAGT FA APPARATET 50M EN OPLYSNING 0M AT APPARATET
INDEHOLDER ET LASERKOMPONENT.

ADVARSEL: INDiREB BOR KUN FORETADES AF EN FAGMAND DA DER ER RISIKO FOR RADIOAKTIV
STR LING.

ADVARSEL : usmue LASERSTRALING VED AENING.
UNDGA UDSAETTELSE FOR STRALING.

Finnish

VAROI :
AVA'I'I'AESSA om ALTI'IINA NAKYMATTOMALLE LASERSATEILYLLE. ALA KATSO SATEESEEN.

I INTERNAL VIEW

0 OPERATION no.5. ASS'Y (1)

0 MAIN ace. ASSY (1)

o PU MECHANICAL UNIT

0 OPTICAL PICK UP HEAD

a |C7 : u-PD75P216ACW (Abil u-CDM)
e OPERATION no.5. ASS'V (a)

OLQ/OLS'XCIO