Yamaha r 9
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Page 1
STEREO RECEIVER
0-3"?
IMPORTANT NOTICE w
This manual has been wrovided for the use of authorized Yamaha Retaliers and their service personnel.
It has been assumed that basic serwce procedures lnheran! to the industry, and more specifically Yamaha
Products, are already known and understood by the users. and have therefore not been restated.
WARNING: Failure to follow appropriate service and safety procedures when servicing this product
may result in personal iniury, destruction of expensive components and failure of the
product to perform as specified. For these reasons we advise all Yamaha product owners
[hit all yervicc required should be performed by an authorized Vamahi Retails: or the
appointed service representative.
IMPORTANT: The presentation or sale of this manual to any individual or firm does not constitute
authorization, certification, recognition of any applicable technical capabilities, or
esmhlish a principle-agent relationship of any form.
The data provided is believed to be accurate and applicable in lhz unitls) Indicated on the cover. The
research, engineering, and service departments of Yamaha are continually striving to improve Yamaha
products. Modifications are, therefore, incurable and changes In specification are subject to change without
notice or obligation IL) retrofit Should any discrepancy appear to exist, please contact the distributors
Service Division
WARNING: Static dismarges can destroy expensive Comvonenls. Discharge any static electricity your
bodv may have accumulated by grounding yourself to the ground buss in the unit (heavy
gauge black wires connect to this bussl.
lMPORTANT: Turn the unit OFF during disassemoly and parts replacement Recheck all work before
you apply power to the UHIL
« I CONTENTS
T0 SERVICE PERSONNEL . . . . . . . . . . . 1 PRINTED CIRCUIT BOARD . . . ....... 16 ~ 23
_ REARPANELS......... ......l WIRING ........ .i ..... 24/25
SPECIFICATIONS ....... ,...............2 CIRCUITDATA........ .......... ...26/27
INTERNALVIEW.......................3 SCHEMATICDIAGRAM..... ......... .28~30
DISASSEMBLY PROCEDURES . . . . . . . . . . . . . 3 BLOCK DIAGRAM . . . ....... . . . . . . .
ADJUSTMENTS . . . . . . . . . . . . . . . . 4 ~ 7 RS-9 REMOTE CONTROL TRANSMITTER .
LSIDATA........... ...........8~I1 PARTSLIST......................
ICBLOCK 12~15
SIWE I587 YAMAHA
NIPPON GAKKI 00.. LTDt HAMAMATSU, JAPAN
l was: I: © Primed in Japan 15.5
Page 2
ITO SERVICE PERSONNEL
1. Critical Components Information.
Components having special characteristics are marked L
and must be replaced with parts having specifications equal
to those originally installed
EQUIPMENT AC LEAKAGE TESTER
2. Leakage Current Measurement (For 120V Model Onlyl. UNDER TEST OR EQUIVALENT
When service has been completed, it IS imperative that you
verify that all exposed conductive surfaces are properly /~ I
insulated from supply circullt L :D
0 Meter impedance should be equivalent to 1500 ohm shunted WALL
l:
by maul: OuTLET lNSU LATING TABLE
0 Leakage current must not exceed 0.5rnA.
v Be sure to test for leakage with the AC plug in both polaritiest
I REAR PANELS
v U.S.A. & Canadian models
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v General model
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v Australian model