Yamaha avx 100 u

Page 1

STEREO INTEGRATED AMPLIFIER

AVX-100/ U

SERVICE MANUAL

IMPORTANT NOTICE

This manual has been provided for the use of aumoriled Yamaha Retailers and their service personnel. it has been assumed that basic service procedures inherant lo 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 procedures when servicing this produci may result in personal iniury, destruction or cxpcnsiyc components
and failure of me 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.

IMPORTANT: The presentation or sale of this manual to any individual or firm does not constitute authorization, certification, recognition or any applicable technical
capabilities, or esrablish a principle~agent relationship of my form.

The data provided is believed to he accurate and applicable to me unitls) indicated on the cover. The research, engineering, and service department of Vamaha are continually
striving to improve Yamaha producm. 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 cpmppncnrs. Discharge any static electricity your body may have accumulated by grounding yourself to me ground
buss in the unir (heavy gauge black wires connect to rhis buss).

IMPORTANT: Turn the unit orr during disassembly and parrs replacemcml Recheck all work before you apply power to the uniL

I TO SERVICE PERSONNEL

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

to those originally installed. ® D-

2, Leakage Current Measurement (For 120V Model Onlyl.

When service has been completed, it is imperative that you WALL :2:

verify that all exposed conductive surfaces are properly =

insulated from supply circuits. OUTLET INSULATING TAB LE
I Meter impedance should be equivalent to 1500 ohm shunted l POLARIZATION (U modal onlyI

by 0.15pF. This amplifier product is equipped with a polarized alterna-

ting~currenl line plug (a plug having one blade wider than the

0 Leakage current must not exceed OiEmAl otherl. This plug will fit into the power outlet only one way.

This is a safety feature.
o Be sure to test for leakage with the AC plug in both polarities.

I CONTENTS

FRONTPANELS........ ......... 1 ICBLOCK..........................7~14
REARPANELS.........................1/2 BLOCKDIAGRAM.. ..... ................15
SPECIFICATIONS .. ....... 3/4 PRINT CIRCUIT BOARD ..... 16~23
DIMENSIONS........................... SCHEMATICDIAGRAM ..... ..........24~27
INTERNALVIEW... ......... WIRING.............................28/29

DISASSEMBLYPROCEDURES PARTS LIST . 30~45

ADJUSTMENT ..

amulet

YAMAHA

YAMAHA CORPORATION HAMAMATSU, JAPAN
3.719662 @K Printed in Japan 88.8l

n/ODLXAV