Yamaha avx 500

Page 1

STEREO AMPLIFIER

/ IMPORTANT NOTICE \

This manual has been plovidad fox the use nf authorized YAMAHA Retailers and their service. personnel.
I! has been assumed LI! basic service pmccdul'as inhalant m the induery, and more specifically YAMAHA
Products, an already known and understood by the users, and have madam not been mute-d.

WARNING: Failurc to follow appmpxiale service and safety procedmw when servicing this product
may result in personal injury, damnation of expensive components and fallum of the
product to perfoxm Is specified. For these masons, we advise all YAMAHA product ownexs
that all savicc required should be perfumed by an authorized YAMAHA Kamila: or The
appoimcd 5min: yqpmenuliva

IMPORTANT: The presemzdon or sde of this manual to any individual m fixm docs not consumzu
ambwiznion. cmificaLian ox recognition of any applicable technical capabililics. or
establish a principle-agent zelafionship of any fun.

Th: dam pmvided ix belicved to be accurate and appficabi: To the unitts) indicated on the cover. The rescxch,
mgineen'ng, and swine departments of YAMAHA m cominually sulving to improve YAMAHA products.
Modifications m, 211me incvluble and specificadmu are subject :0 clung: widwul mice or obligation m
nuofii. Should any discrepancy zppeaf l0 exist. please Contact The distributors Service Division.

WARNING: Static dischargcs can desuny expensive components. Dischn'gc any static elecu'Icily youx
body may have accumulated by grounding ycmsnlf m the gmund buss in the uni! (heavy
gauge black wines connecl To This buss).

IMPORTANT: Tum ihe unii OFF dunng disassembly and pans mplacemcnl. Red-leek all wad: before you

\ apply power In the mix. /
I CONTENTS
TO SERVICE PERSONNEL ........................................... 1 ADJUSTMENTS .............................................................. 7
INTERNAL VIEW 1 IC DATA ...............................
FRONT PANEL .. 2 PRINTED CIRCUIT BOARD
REAR PANELS ..... .3 SCHEMATIC DIAGRAM ......................
SPECIFICATIONS . .4 INTERCONNECT WIRING DIAGRAM
BLOCK DIAGRAM ...................... 5 PARTS LIST...
DISASSEMBLY PROCEDURES. .6 REMOTE CONTROL TRANSMITTER
REMOTE CONTROL TERMINAL ................................... 7

YAMAHA

YAMAHA CORPORATION
Hamamaisu Japan

RRKRSREPKISrintPId m Ianan 90 3

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AVX-500

AVX-500

I TO SERVICE PERSONNEL

1, Critical Components Information.
Components having special characteristics are marked 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 oonductive surfaces are properly insu-
lated from supply circuits.

0 Meter impedance should be equivalent to 1500 ohm shunted

by 0.15pF.

c Leakage current must not exceed 0,5mA.

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

polarities,

o FUSE REPLACEMENT :

This symbol, when located
adjacent to a fuse, indicates:

AC LEAKAGE
WALL EQUIPMENT TESTER OR
OUTLET UNDER TEST EQUIVALENT
INSULATING =
TABLE

0 POLARIZATION (U, C models only)
This amplifier product is equipped with a polarized alternat-
ing-current line plug (a plug having one blade wider than the
other) This plug will fit into the power outlet only one way.
This is a safety feature.

CAUTION : FOR CONTINUED PROTECTION AGAINST RISK OF FIRE, REPLACE ONLY WITH SAME TYPE FUSE.

Fuse F201 must be 7A 125V.
Fuse F202 and F203 must be TSA 125V.
Fuse F204 to F206 must be T2.5A 250V.

I INTERNAL VIEW

0 POWER TRANSFORMER
U. S. A model : XH038AOO
Canadian model : XH039A00
General model : XH04OA00
Australian & British models '. XH041A00
European model : XH042A00
9 MAIN CIRCUIT BOARD (2)

3 MAIN CIRCUIT BOARD (a)

o u-COM CIRCUIT BOARD (9)

9 p-COM CIRCUIT BOARD (1)

9 MAIN CIRCUIT BOARD m

o SURROUND CIRCUIT BOARD (1)

@ LA2770 00214) : DOLBY PRO LOGIC
9 SURROUND CIRCUIT BOARD (2)