Yamaha rx v995

Page 1

AV RECEIVER

X-V995

SERVICE MANUAL

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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 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
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.

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 to the unir(s) indicated on the covert The research, engineering, and
service departments of YAMAHA are continually striving to improve YAMAHA products. Modifications are, therefore,
inevitable and specifications are subject to change without notice or obligation to retrofit, Should any discrepancy uppear to exist.
please Contact the distributor's Service Division.

WARNING: 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).

IMPORTANT: Turn the unit OFF during disassembly and part replacement. Recheck all work before you apply power to the

I CONTENTS

TO SERVICE PERSONNEL
REAR PANELS

SPECIFICATIONS ...... 3~5
INTERNAL VIEW .. .......................................... 6
DISASSEMBLY PROCEDURES 6
SELF DIAGNOSIS FUNCTION
AMP CHECK .
TUfiNER ADJUSTMENTS .
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This Service Manual uses recycled paper,

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unit. /

DISPLAY DATA ..................... ................... 26
IC DATA .................. . ............. 27~38
BLOCK DIAGRAM ............ .. 39~43
PRINTED CIRCUIT BOARD ............. ............ 44~68

69
70~78
79~99
100~1 04

PIN CONNECTION DIAGRAM
SCHEMATIC DIAGRAM
PARTS LIST
REMOTE CONTROL TRANSMITTER

OYAIVIAHA

AfiORPORATION
amamatsu Japan

l.8K«6921 I13 6) Printed in Japan 99.1

QGGAXH

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I TO SERVICE PERSONNEL

1. Critical Components Information.
Components having special characteristics are marked A
and must be replaced with parts having specifications equal
to those originally installed:

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

0 Meter impedance should be equivalent to 1500 ohm shunted
by 0.15m;

o Leakage current must not exceed 0.5mA.

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!

If 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 model

Ac LEAKAGE
WALL EQUIPMENT TESTER on
OUTLET UNDER TEST EQUIVALENT
INSULATING _
TABLE

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

WARNING

Do not change the IMPEDANCE SELECTOR
switch setting while the power to this unit is
on, otherwise this unit may be damaged.

IMPEDANCE SELECTOR

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