Yamaha mx 830

Page 1

STEREO POWER AMPLIFIER

MX-83O

SERVICE MANUAL

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MPORTANT NOTICE

This manuaI has berm provldcd for the use of authorized Yamaha Rnullers and their scryiL: personnel
It has been issumed that basic serylce procedures inherim lo Ih: Industry, and mare specificaIIy Yamaha
Products, are aiready known and understood by the users, and have therelore nol been restated.

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WARNING: FalIurc to (allow approprlzlc service and safely procedures when servlcmg lhls produer

may resulr in personal iniury, destruction or expensive eomppnenrs and faIIure oi the

l produer rd pcriorm as specified. For these reasons, we advise all vamalra product owners

i that all service required shouId be periormed by an authorized Yamaha ReulIer or the
I

appplmed service represeprarive

IMPORTANT: The presentation or saIe or this manuaI to any lndmdual or firm does not constitute
authorization, certiflutiun or recognltxon a! any applicable technical capabilities. or
establish a pflnEIDICagCVIl relationship of any form.

The data provided IS beIieyed [0 be accurate and applicable to me uniris) indicated on Lh: covert The
research, engineerlng, and servree departments or Yamaha are continually SUIVIng to improve Yamaha
products. Modifications are, rhereiore, inevitable and specifications are subieer lo change wilhoul nprree or
obligation to retrofit. Should any discrepancy appear to exist, please eomacr the dlslnbulor's Service
DIVlsiun

WARNING: Static discharges can destroy expensive components Discharge any static electricity your
body may have accumulated by grounding vourseli X0 the ground buss in the unlI (heavy
gauge black wires connect to this buss),

l
IMPORTANT: Turn [he UI'III OFF during disassemny and pans rcpIaamenL Recheck alI work before
you appIy power to the unit I

I CONTENTS

TO SERVICE PERSONNEL ....................... 1 ADJUSTMENTS ......................................... 4
SPECIFICATIONS e ........................ 1 WIRING ..................................................... 5
REAR PANELS ------------------------------------------ 2 PRINTED CIRCUIT BOARD ----------------- 6-11
BLOCK DIAGRAM ...................................... 3 SCHEMATIC DIAGRAM aaaaaaaaaaaaaaaaaaaaaaaaaaaa 12
INTERNAL VIEW-- .......................... 3 pARTs LIST ............... . ....................... 13,20

DISASSEMBLY PROCEDURES ------------------ 4

: YAMAHA

_ . , YAMAHA LORPORATION
PO Box I. Hamamaisudapan

1@ K Printed in Japan '9 I;

3.3K

Page 2

MX-830

MX-830

I TO SERVICE PERSONNEL

1. Critical Components Information.
Components having special characteristics are marked .5
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 conductive surIaces are properly
insulated from supply circuits.

0 Meter impedance should be equivalent to 1500 ohm shunted
by 0.15uF.

a Leakage current must not exceed 0.5mA.

0 Be sure to test Ior leakage With the AC plug in both polarities.

I SPECIFICATIONS

Mlnlmum RMS Output Power per Channel (20 Hz - 20 kHz)
0.003% THD, e ohma
0.007% THD. B ohma
0.02% THD. 4 ahma ..........

Dynamlc Power per Channel
(by IHF Dynamlc Headroom moaaurlng method)
5 ohms -

6 ohma
4 ohma

2 ohms . . . . .. . .
DIN Standard Output Power per Channel (Europe model only)
1 kHz. 1% THD. 4 ohma .. ..
Dynamlc Headroom (U. SA. a 6 canada models only)

8 ohms
a ohma ...........
4 ohms
IEC Power (Europa model only)
1 ItHz, 1% THD

8 china
6 ohm
4 ohms
Power Band Wldth 0.03% THD SSW/B china
Damplng Factor (1 kHz, 0 ohms) ,,
Input SanaItIvIty/Input Impedance
MAIN IN
Frequency Response (20 Hz - 20 kHz)
MAIN IN.
Total Hammlc Dlatortlon (20 Hz - 20 kHz)
MAIN IN to Sp Out, SSW/8 ohma ,
lntormodulatlon Dlatoitlon
Rated Output/B ohms .
SIgnal-to-Nolaa Ratio (IHF-A-Network)
MAIN m (shorted) V
MAIN IN (51 It-ohma termlnated)
Ruldull Nolse (MFA-Network).
Channel Separatlon (Input shorted, termlnated, 1 kHz/10 kHz)
Power Supply
Europa model
General model.
U K. and Auatralla models
USA. and Canada models
Power Conaumptlon
General modal.
USA and Canada mod a ..
Europa, U. K. and Auatra e in
AC OutIet U....SA Canada and Gene al modela only)
UNSWI CHEDI x 1
Dlmonalona (W it H it D)-
Wolght . .

' Please note that the deSIQI) and all speCIlicalions are SUDIECI to change w

notice.

@

AC LEAKAGE TESTEFI
OR EQUIVALENT

J:

EQUIPMENT
UNDER TEST

:D-

WALL 5::
OUTLET INSULATING TABLE
0 POLARIZATION (U, C models only)

1 32V/60 690th

+0

89/72 dB

AC 220V 50 Hz

AC 110/120/220/240V 50/60 Hz
. AC 240V 50 HZ
AC 120V 60 Hz

. 650W

200W max ..
435 X170X 425 mm (17-1/8 x62/3 X 163/4)
145 kg (31 lbs 14 02)

This ampliiier product is equipped With a polarized alternat-
ing current line plug (a plug havmg one blade wider than the
other I. This plug will fit into the power outlet only one way.
This ia a saIety Ieature.

(U) U.S.A model
170w
195w (C) """""""" Canadian model
230w
(G) """""""" European model
270w (A) """""""" Australian model
330w . .
440w (B) """""""" British model
570w
(R) """""""" General model
.250 w
201 dB
2 28 dB
. 282 dB
0 Dimentions
200 w
240 w
280 w flfiflflfiflk *
10 Hz , 60 kHz ' *
. , , . .. 90

/£ 2 dB
. 0 003%
0 003%

384.55.
425ll6.7l

124 dB
l20 dB
21 ..v

435nm)

[.-

520W
800 VA
1 . l50W

l50(5.9)

Unil:mm(Inch)