Yamaha rx 485 rds

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STEREO RECEIVER
FIX-48 5/

RX-485RDS

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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 moie specifically YAMAHA
Products, are already known and understood by me users, and have therefore not been restated.
WARNING: Failure tn 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 its 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
authorization, certification or recognition of any applicable technical capabilities, or
establish a pnnciplcvngeni relationship of any form.

The data provtded is believed to be accuralc and applicable to the unll(5) indicated on the cover. The teseach,
engineering, and service departments of YAMAHA are continually striving to improve YAMAHA products.
Modifications are. therefore, inevitable and specifications are subject to change withoui notice or obligation tn

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I CONTENTS

TO SERVICE PERSONNEL .
FRONT PANELS...................
REAR PANELS ..
SPECIFICATIONS
INTERNAL VIEW .....................
DISASSEMBLY PROCEDURES .
AMP ADJUSTMENTS
TEST MODE ..............
TUNER ADJUSTMENTS
RX-485 BLOCK DIAGRAM
RX-485RDS BLOCK DIAGRAM .

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

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

IMPORTANT: Turn the um! OI-l' during disassembly and part replacement. Reel-reek all work before you

apply power to the unit.

RX-485 p-COM DATA ........
RX-485RDS u-COM DATA.
RX-485 DISPLAY DATA ........
RX-485RDS DISPLAY DATA
FRONT END PACK ............
TEST POINT WAVEFORMS .
PRINTED CIRCUIT BOARD
SCHEMATIC DIAGRAM .....
PARTS LIST ........................................
REMOTE CONTROL TRANSMITTER

_

YAMAHA

YAMAHA CORPORAHON
P,O.Box1 ,Hamamatsu,Japan

2.95K-223 IE! QC Printed in Japan 94.4

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RX~485RDS

RX-485/RX-485RDS

I TO SERVICE PERSONNEL

1. Critical Components Intcrmation.

Components having special characteristics are marked and AC LEAKAGE

must be replaced with pans having specifications equal to WALL EQUIPMENT TESTER 0R

those originally installed OUTLET UNDER TEST EQUIVALENT
2. Leakage Current Measurement (For 120V Models Only) : )-

Whan service has been completed, it is imperative to verily @

that all exposed conductive surtaces are properly insulated J_-

t ' , =

ram supply CerUIIS INSULATING

o Meier Impedance should be equivalent to 1500 ohm shunted TABLE
by 0.15;»:

e Leakage current must not exceed 0.5mA.

0 Be sure to test for leakage with the AC plug in both
polarities.

WARNING: CHEMICAL CONTENT NOTICE!

The solder used in the production at this product contains LEADt in addition, other electrical/electronic and/or
plastic (where applicable) components may also contain traces of chemicals iound 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 WHAT SO EVER!

Avoid prolonged, unprotected contact between solder and your skin! When soldering, do not inhale solder lumes or
expose eyes to solder/flux vapori

It you come in contact with solder or components located inside the enclosure 01 this product, wash your hands
before handling load.

I FRONT PANELS

V FIX-485

WWW m-u um mm .17...
arms mwm mm
fl 7' EH aEHEEE 1: 7:4!

M M... m... .. a...

V RX-485RDS

WWI ram-2:0 mm ma.-
m- m _...,.

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fl

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