Yamaha cdx 900 u

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COMPACT DISC PLAYER

IX 900/ CDX 900U

SERVEICE MANUAL

VIMAIIA NAVLPAL we cows-Cr as: eaves: Bax-Goa

IMPORTANT NOTICE

This manual has been provided for the use of authorized Yamaha Reullers 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.

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WARNING: Failure to follow appropriate service and safety procedures when servicing this product
may result in personal inlury. 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 perlarmed by an authorized Yamaha Retailer or the
avpulnled service representative.

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IMPORTANT: The nresematinn or sale of this manual to any individual or firm does not conslltute
authorization, certification or recognition of any applicable technical cauzbilities, or
establish a principle-agent relationship of any form.

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The data provided l5 believed [a be accurate and applicable to the unills) indicated on the cover. The
research, engineering, and service departments of Yamaha are mnllnually striving to improve Yamaha
products. Modificatlons are therefore, inevitable and specifications are subject to change witnout notice or
obliganon to retrofit. Should any discrepancy appear to exist, please eantact the distributors Serwee
Division,

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

IMPORTANT: Turn the unit OFF during disassembiy and parts replacement. Reeheek all work before

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I CONTENTS

TOSERVICEPERSONNEL ....... ......1/2 LSIDATA........................25~29
INTERLOCKOPERATION ....... 3 FLDATA. 30
FRONTPANELS.................. ...... 3 ICBLOCK.........................31/32
REAR PANELS ...... « ....... -. . . PRINTED CIRCUIT BOARD ........ . . . . 33~37
SPECIFICATIONS.. ..... SCHEMATIC DIAGRAM...... ....... 38
BLOCKDIAGRAM ........... WIRING.......... ....... . 39
CHIP COMPONENTS DESCRIPTION RS-CDQ REMOTE CONTROL TRANSMITTER . . . 40
DISASSEMBLYPROCEDURES.............. 9 PARTSLIST ..... ..................4I~53

ADJUSTMENTS . . .................. 10 N 24

YAMAHA

NlPPON GAKKl C0, LTD. HAMAMATSU. JAPAN
3.25K-363 HG) Printed in Japan 873

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ITO SERVICE PERSONNEL

1. Critical Components Information.
Components having specval charactenstrcs are marked
and must be replaced with parts having specifications equal

to those originally installed. V
EQUIPMENT AC LEAKAGE TESTER

2. Leakage Current Measurement (For 120V Model Only). UNDER TEST OR EQUIVALENT
When service has been completed, it IS imperative that you
verify that all exposed conductive surfaces are properly
insulated from supply circuits. ® :0
0 Meter impedance should be equivalent to 1500 ohm shunted WALL E:
b" 015: OUTLET INSULATING TABLE 7

a Leakage current must not exceed 0.5mA.
I Be sure to resr lor leakage With the AC plug m both polarttles.

u POLARIZATION
This tuner product is equipped with a polarized alternating-
current line plug (a plug having one blade wider than the
other). This plug will fit into the power outlet only one way.
This is a safety feature.

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

THE COMPACT DISC PLAYER SHOULD NOT BE ADJUSTED 0R REPAIRED BY ANYONE EXCEPT
PROPERLY QUALIFIED SERVICE PERSONNEL.
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BOTTOM SIDE

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THIS PRODUCT CDMPLIES WITH UHHS RULES 21 CFR
SUECHAPTEH J APPLICABLE AT DATE OF MANUFACTURE.

MANUFACTURED BY
NIPPON EAKKI CD.,LTD.
III-1 NAKAZAWA-CHD.
HAMAMATSU-SNI.
SHIZUDKA

MANUFACTURED:

LASER BEAM RADIATION SPOT
DG-I
Laser Dlode Properties
Material: Ga-Al-As
Wavelength: 780 - 820 nm (25°C)
Laser Output: Continuous Wave max. 5 mW

Laser Beam Radiation

M LP-7
Laser Diode Properties
Material: Ga-Al-As
Wavelength: 755 - 805 mm (25°C)
Laser Output: Continuous Wave max. 5 mW