Yamaha kx 670

Page 1

STEREO CASSETTE DECK

KX-67O

SERVICE MANUAL

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I CONTENTS

TO SERVICE PERSONNEL

REAR PANELS
SPECIFICATIONS

/ IMPORTANT NOTICE \

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This manual has been provided {or the use of authorized YAMAHA Retailers 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,

WARNING: Failure to follow appropriate service and safety procedures when servicing this product
may result in personal injury. destmcrion 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 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 he accumte and applicable to the unit(s) indicated on the cover. The remit,
engineering, and service depanments 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 appear to exist, please contact the distributors Service Division.

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

IMPORTANT: Turn the unit OFF during disassemhly and parts replacement. Reeheck all work before you

12~15
1 5~18

1 PRINTED CIRCUIT BOARD..
2 p-com DATA
DISPLAY DATA

INTERNAL VIEW 3 IC BLOCK
BLOCK DIAGRAM................... SCHEMATIC DIAGRAM
DISASSEMBLY PROCEDURES PARTS LIST 23~35

ADJUSTMENTS

YAMAHA CORPORATION
P.O.Box1 .Hamamatsudaoan

2.9K-033 [a 6) Printed in Japan 92.12.

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KX-670

I TO SERVICE PERSONNEL

1.

Critical Components Information.

Components having special characteristics are marked and
must be replaced with parts having specifications equal to
those originally installed.

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

Meter Impedance should be equivalent to 1500 ohin shunted
by 0.1 SuF.

Leakage current must not exceed 0.5mA.

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

Laboratories Licensing Corporation.

Dolby noise reductlon and HX PRO headroom extension
manufactured under license from Dolby Laboratories
Licensing Corporation.

HX PRO originated by Bang and Olufsen. DOLBY, the
double-D symbol and HX PRO are trademarks of Dolby

AC LEAKAGE
WALL EQUIPMENT TESTER on
OUTLET UNDER TEST EQUIVALENT
INSULATING -
TABLE

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 skint When soldering, do not inhale

solder fumes or expose eyes to solder/flux vaporl

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