Yamaha cx 830

Page 1

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STEREO CONTROL AMPLIFIER

CX-83O

/--- 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 compo-
nents 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 no:
constitute authorization, certification or recognition of any applicable technic-
al capabilities, or establish a principle-agent relationship of any form.

The data provided is believed to be accurate and applicable to the unit(s) indicated on the
cover. The research, engineering, and service departments of Yamaha are continually
striving to improve Yamaha products Modifications are, therefore, inevitable and specifica-
tions are subject to change without notice or obligation to retrofit Should any discrepancy
appear 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 parts replacement. Recheck el

work before you apply power to the unit.
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I CONTENTS
T0 SERVICE PERSONNEL ................. 1 ADJUSTMENTS ........................ 7
SPECIFICATIONS ....................... 2 BLOCK DIAGRAM ......................
REAR PANELS ......................... 3 PRINTED CIRCUIT BOARD .......
INTERNAL VIEW ........... 4 WIRING .........
DISASSEMBLY PROCEDURES . . SCHEMATIC DIAGRAM ..........
IC BLOCK ................. PARTS LIST .......................... 13

-

YAMAHA

YAMAHA CORFDRATION
PO Boxl Hamantitsa Japan

3.3KA912 ©® Printed in law 90-3

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CX-830

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 Model Only).
When service has been completed, it is imperative that
you verify that all exposed conductive surfaces are

properly insulated from supply circuits.

- Meter impedance should be equivalent to 1500 ohm

shunted by 0.15yF.

° Leakage current must not exceed U.SmA.

' Be sure to test for leakage with the AC plug in both

polarities.

I REMOTE CONTROL TRANSMITTER

0 U.S.A. and Canadian models

eouwmam Ac LEAKAGE TESTER
UNDER TEST OR EOUWALENT
® 43- «-
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U msumnuo TABLE 2

- POLARIZATION
This amplifier product is equipped with a polarized
alternating-current lineplug (a plug having one blade
wider than the other). This plug will litinto the power
outlet only one way. This is a safety feature. (U,C Model
only)

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0 European, British, Australian and General models

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