Yamaha rx s70

Page 1

STEREO RECEIVER

" RX-S7O

SERV E MANUAL

YAMAHA

-Systern CC-70W is composed of RX-
870, CDC-$90. KXW-S70 and NX-S70.
-System 00-708 is composed oi RX-
S70, CDC-S90, KX-SQO and NX-S70.

Model Manual No.
R X»S7O 1 00465
CDC KXW-S7O 100467
KX-SBO 1 00468
NX»S70 1 00469

I CONTENTS

TO SERVICE PERSONNEL ..

FIX-$70 is a receiver designed for COMPACT SYSTEM CC-7OS/W.

/

WARNING:

IMPORTANT:

WARNING:

IMPORTANT:

I \

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 more specifically YAMAHA Products.
are already known and understood by the users, and have therefore not been restated.

, The data provided is believed to be accurate and applicable to the unir(s) indicahzd on the covert The teseach,
engineering. and service departments of YAMAHA are continually striving to improve YAMAHA products, Modi»
fications are, therefore. inevitable and specifications are subject to change without notice or obligation to retrofit
Should any discrepancy appear to exist. please contact the distributor's Service Division.

IMPORTANT NOTICE \

Failure to follow appropriate service and safety procedures when sewlclng 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 any service required
should be performed by an authorized YAMAHA Retailer or the appointed service representative.

The presentation or sale of this manual to any individual or firm does not constitute authoriuuon,
certification or recognition of any applicable technical capabilities. or establish a principle
agent relationship of any form.

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

Tum the unit OFF during disassembly and part replacement. Recheck all work before you apply

power to the unit /

,BLOCK. DIAGRAM ..

REAR PANELS ................ .. it-COM DATA ...... 15~16
SPECIFICATIONS . DISPLAY DATA ....................

INTERNAL VIEW .. PRINTED CIRCUIT BOARD

DISASSEMBLY PROCEDURES. IC BLOCK ............ 24~25
ADJUSTMENT IN POWER AMPLIFIER SECTION .. FRONT END PACK. ...26
ADJUSTMENT IN TUNER SECTION ~10 TEST POINT WAVEFORMS ...27
DEMO MODE ................ .11 SCHEMATIC DIAGRAM ...... 28~30
TEST PROGRAM MODE. .11 REMOTE CONTROL TRANSMITTER .

SYSTEM CONNECTOR CHECK ................... ...... 12 PARTS LIST ......................................

\

100465

YAMAHA CORPORATION
P.O.Box1 .Hamamatsudaoan

3.2K-843 I'D] 6) Printed in Japan 93.8

OLS'XH

Page 2

RX-S'IO

I TO SERVICE PERSONNEL

1. Critical. Components Information. AC LEAKAGE
Components having special characteristics are marked and WALL EQUIPMENT TESTER on
must be replaced with parts having specifications equal to OUTLET UNDER TEST EQUIVALENT
those originally installed.

2, Leakage Current Measurement (For 120V Models Only). ® 3
When service has been completed, it is imperative to verify
that all exposed conductive surfaces are properly insulated -
from supply circuits. . INSULATING

. TABLE

0 Meter impedance should' be equivalent to 1500 ohm shunted
by 0.15mi V

o 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 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!

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

I REAR PANELS

V U, C models

J1. MIDWWMHIEWWIIIDFHEFMMR

23:}

@EI Wm mummcuimnam:
in} mum um: weaemwmw E
i Hummus mimnzmmrmmsummum
mm. m murmur AMAHAm WWW
=1,.©©@© W A "Em! XENON iwwmrs son: ©
YAMAHA CORPORATION
,. m W © C8J© . - mes-es mm
m. M WWF_ mi "p'i'fié'fim "Emauwnn y
(9 © v @ama [(3) @mW. @i
D _l o @
'W-mswmmmwawwm® WEti'lii'mumsatat'm ©