Yamaha c 80

Page 1

STEREO CONTROL AMPLIFIER

I FRONT PANEL

C-8O

SERVICE MANU

mum

mraaufimgfil Bunch I: am

n menus In mm

Elm

Bum! n Aux

I
y/
$3533; used in the PC board for rhis' unit serves not only as I CONTENTS
5 ground, but also for +3 and -8 power sources. PIease
take care when taking readings- T0 SERVICE PERSONNEL ........... _ ..... 1
REAR PANEL ......................... 1
BLOCK DIAGRAM . . ................... 2
SPECIFICATIONS ...................... Z
s. INTERNAL VIEW ...................... 3
DISASSEMBLY PROCEDURES ............. 3
ADJUSTMENTS .............. . . ...... 3
PRINTED CIRCUIT BOARD .............. 4~9
SCHEMATIC DIAGRAM .......... . ....... 10
WIRING ..... , ........................ 11
PARTS LIST .......................... 12
J
gm 1937 YAMAHA
'

NIPPON GAKKI (30.. LTD, HAMAMATSU. JAPAN
has: n @ Printed in Japan. '8;

Page 2

C-80

ITOSERVICE PERSONNEL

1. Critical Components Information.
Components having special characteristics are marked A
and must be replaced with parts having specifications equal
to thoseoriginally installed. _ r

2. Leakage Current Measurement (For 120V Model Only).

yWhen service has been completed. it is imperative that you
verify that all exposed conductive surfaces are properly ®
insulated from supply circuits.

0 Meter impedanceshould be equivalent to 1500 ohm shunted WALL}

i Leakage current must not exceed 0.5mA.

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

I REAR PANEL

'_ U.S.A. 8: Canadian models

g'ifiQUlPMENT AC LEAKAGE TESTER
£JNDERTEST 0R EQUIVALENT

,.byA0.15uF. V » OUTLET INSULATINGTABLE "

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