Yamaha ax 1050

Page 1

STEREO INTEGRATED AMPLIFIER

\re__.-4 44*

AX-1 050

~ ER CE MANUAL

I FRONT PANEL

MW mum mm rm .-

m- a... :l m

I CONTENTS

TO SERVICE PERSONNEL

REAR PANELS .................
SPECIFICATIONS .
DIMENSIONS .....
INTERNAL VIEW ..
DISASSEMBLY PROCEDURES .

/ IMPORTANT NOTICE \

k apply power to the unit,

This minual has been provided {or the use of nuthorized YAMAHA Ratlilars and their service personnel.
It has been assumed that buic service pmcedures inherent to the industry, and more speeificllly YAMAHA
Products, are already known 1nd nndustood by the users, and have therefore not been muted.

WARNING: Failure to follow appropriate service and slfety procedutes when servicing this product
may result in personal injury, destruction of expensive components. and failure of the
product to perform ts specified, For these reasons. we advise all YAMAHA product owners
Ihzl any service required should be performed by an authorized YAMAHA Retailer or the
appointed service representative,

IMPORTANT: The pmsenulimt or sale of this manmt In any individual or firm does hm constitute
quml'iulim, certifieetion a: 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 m improve YAMAHA pmducu
Modifications m. thewfme, inevitable and specificaliuns are subject to change without notice or obligation In
rthvItL Shauld any discrepancy appear to exist, please cnnmct the distributor; Service Division.

WARNING: Static discharges can destroy expensive companents. Discharge .tny static Electricity your
body my have accumulated by grnunding yourself In the ground buss in the uni: (heavy
gauge black wires connect to this buss).

IMPORTANT: Turn the unit or? during disassembly and put replacement. Recheck all woLk before you

-1 ADJUSTMENTS .....
BLOCK DIAGRAM.

3 WIRING ............

.3 PRINTED CIRCUIT BOARD

-4 SCHEMATIC DIAGRAM

.4 PARTS LIST .......... .16~25
REMOTE CONTROL TRANSMITTER .............................. 26

nun

YAMAHA

YAMAHA CORPORATION
PO.BOX1 Hamamatsu. Japan

2.4K7693 [1] 6) Printed in Japan 91.9

>
>.<
.-A
0
UI
to

Page 2

AX-1050

I TO SERVICE PERSONNEL

1. Critical Components lntormationt
Components having special characteristics are marked A

AC LEAKAGE TESTER
OR EQUIVALENT

and must be replaced with parts having specifications equal to EfiglligMTEElgl-r
those originally installed.
2. Leakage Current Measurement (For 120 V Model Only), I:
When service has been completed, it is imperative that you ®
verify that all exposed conductive surfaces are properly WALL
insulated from supply circuits. OUTLET I:
- Meter impedance should be equivalent to 1500 ohm shunted by tNSULATING TABLE

0.15 uF.
- Leakage current must not exceed 0.5 mA.
- Be sure to test for leakage with the AC plug in both polarities.

I REAR PANELS

C General model

J_-

+07