Yamaha cdx 890

Page 1

COMPACT DISC PLAYER

CDX-890

SERVICE MANUAL

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WARNING:

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 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 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 authorization, 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 [0 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
ifieations are subject to change without notice or obligation to retrofit Shouid 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 before you apply power to the unit.

I CONTENTS

TO SERVICE PERSONNEL . ............ . .......... 1~2
INTERNAL'VIEW
REAR PANEL ..
SPECIFICATIONS
DISASSEMBLY PROCEDURES ...... 4
STANDARD OPERATION CHART . 5~6
TEST MODE ..
MEMORY BACKUP.
ERROR MESSAGE ......... .. ....... .......... 9~11

DISPLAY DATA ...... .................. ....... . 12
IC DATA 13~16
PIN CONNECTION DIAGRAM .
PRINTED CIRCUIT BOARD ..
BLOCK DIAGRAM .............. ...... 22~23
IC BLOCKS ............
SCHEMATIC DIAGRAM
REMOTE CONTROL TRANSMITTER.
PARTS LIST.... .............. .. ...................... .. ......... 2848

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CDX-890

I TO SERVICE PERSONNEL

Critical Components Information.

Components having special characteristics are marked and WALL EQUIPMENT AgslfiEAgggE
must be replaced with parts having specifications equal to OUTLET UNDEP. TEST EQUIVALENT
those originally installed.

INSULATING -

TABLE

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

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QUALIFIED SERVICE PERSONNEL.

PROTECTION OF EYES FROM LASER BEAM DURING SERVICING

This set employs a laser. Therefore, be sure to oareiully
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.

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CLASS 1 LASER PRODUCT
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