Yamaha cx 1000 u

Page 1

STEREO CONTROL AMPLIFIER

X-1000/U/2000

SERVICE MANUAL

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IMPORTANT NOTICE

This manual has been provided for the use of authorized Yamaha Retailers and their sermce personnelt It has been assumed mat basic service procedures inherzrlL m 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 appropriaic service and safety procrdurcs when servicing ihis product may result in personal inivry, destruction or 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 me appointed service representative.

l IMPORTANT: The prescniation or sale of this manual to any individual or firm does not constimt: audlarizat'lon, certification, recognition or any applicable technical
capahilities, or esiablish a principle-agent relationship of any form.

The data provided is believed to be accurate and applicable io lb: uniiis) indicated on the cover. The research, engineering, and service daparoncms or Yamaha are continually
striving to improve Yamaha producis. Modifications are, therefore, incviiablc and specifications are suoiocr to change without notice or obligation to retrofit. Should any
discrepancy appear to exist, please Contact the distributors Service Division.

WARNING: Static discharges can desrroy expensive component; Dischargc any sraiic electricity your body may have accumulated by grounding yourself to the ground
huss in the unit (heavy gauge black wires connect to this bussla

IMPORTANT: Turn die unit OFF during disasscmoly and parts replacement Recheck all work before you apply power to the unit

I TO SERVICE PERSONNEL

1. Critical Camponents Information. EQUIPMENT AC LEAKAGE TESTER
Components having special characteristics are marked UNDER TEST 0R EQUIVALENT
and must be replaced with parts having specifications equal

to those originally installed. ® 13

2. Leakage Current Measurement (For 120V Model Only).
When service has been cornpleted, it is imperative that you WALL I:
verify that all exposed conductive surfaces are properly OUTLET =

insulated from supply circuits. lNSULATING TABLE

,l I Meter impedance should be equivalent to 1500 ohm shunted O POLARIZATION
by 0.15yF.
This tuner proddct is equipped with a polarized alternating-
. Leakage current must not exceed 0.5mA. current line plug la plug having one blade wider than the
other). This plug will fit into the power outlet only one way
I Be sure to test for leakage with the AC plug in both polarities. This is a safety feature, IU.C modal only)

I CONTENTS

FRONTPANELS ......... .'..............1 ADJUSTMENTS ....... . ..... ....... 7
REAR PANELS (CX-1000/U)..:.............. 2 IC BLOCK 8~15
REARPANELICX-ZOOO)...... ............. 3 BLOCKDIAGRAM.....................16/17
SPECIFICATION......... . 3 PRINTED CIRCUIT BOARD ..............18~29
INTERNAL VIEW. ..... 4 SCHEMATIC DIAGRAM ................. 30/31
DIMENSIONS..........................'.. 4 WIRING 32
DISASSEMBLYPROCEDURE. ........ ......5/6 PARTSLIST.........................33~48

' YAMAHA

YAMAHA CORPORATION HAMAMATSU, JAPAN
37K-162@ K Printed in Japan 88]