Yamaha KMA-1000 Service Manual

KMA-1000/KMA-950

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 specifi cally 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 specifi ed. For these reasons, 

we advise all YAMAHA product owners that any service required should be performed by an authorized YAMA-

HA Retailer or the appointed service representative.

IMPORTANT: 

The presentation or sale of this manual to any individual or fi rm does not constitute authorization,  certifi cation  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 unit(s) indicated on the cover.  The research, engineering, and 

service departments of YAMAHA are continually striving  to improve YAMAHA products. Modifi cations are, therefore, inevitable 

and specifi cations are subject to change without notice or obligation to retrofi t. 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 accumu-

lated 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 unit.

IMPORTANT NOTICE

1 0 1 1 4 0

SERVICE MANUAL

CONFIRMATION OF IDLING CURRENT OF AMP 

UNIT  ............................................................................ 14

IC DATA  ................................................................ 15–16

BLOCK DIAGRAM

  ..................................................... 17 

PIN CONNECTION DIAGRAMS  ................................ 18  

PRINTED CIRCUIT BOARDS  .............................. 19–36 

SCHEMATIC DIAGRAMS  ..................................... 37–50 

REPLACEMENT PARTS LIST  ............................. 51–63

REMOTE CONTROL  .................................................. 64

SETUP MODE  ...................................................... 65–67

CONTENTS

■

TO SERVICE PERSONNEL  ......................................... 2

IMPEDANCE SELECTOR  ............................................ 3

FRONT PANELS  .......................................................... 3

REAR PANELS  ............................................................. 4

REMOTE CONTROL PANEL  ....................................... 5

SPECIFICATIONS  .................................................... 5–6 

INTERNAL VIEW  .......................................................... 6

DISASSEMBLY PROCEDURES  .................................. 7

INDICATION OF PROTECTION INFORMATION  ........ 8

SELF-DIAGNOSTIC FUNCTION  ............................ 9–13

Copyright © 2009 YAMAHA CORPORATION. All rights reserved.

This manual is copyrighted by YAMAHA and may not be copied or

redistributed either in print or electronically without permission.

  ’09.05

DIGITAL KARAOKE MIXING AMPLIFIER

KMA-1000/KMA-950

For T  model