Yamaha m 80 sm
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Page 1
STEREO POWER AMPLIFIER
M-80
SER ICED NU
ITO SERVICE PERSONNEL
1.
Critical Components Information.
Components having special characteristics are marked A and must be replaced with parts having
specifications equal to tlmse originally installed,
.Leakage Current Measurement(For 120V Model Only),
When service has been completed, it is imperative that you verify that all exposed conductive su'
rfaces are properly insulated from supply circuits,
OMeter impedance should be equivalent to 1500 ohm shunted by 0.15/1F.
oLeakage current must not exceed OlSmA. EQUIPMENT AC LEAKAGE TESTER
we sure to test for leakage with UNDER TEST 0 EQUVALENT
AC plug in both polaritiesr ®
WALL :1 -_L-
OUTLET (NSULATING TABLE '
ICONTENTS
REAR PANELW P.Cr BOARD~PDWER SUPLY- 7
BLOCK DIAGRAM -
SPECIFICATIONS
DISASSEMBLY PROCEDURE
INTERNAL VIEW-
ADJ USTMENTS~~
PrC, BOARD~METER
P,C. BOARD~MAIN~
mmhthNA
SCHEMATIC DIAGRAM~MAIN~
SCHEMATIC DIAGRAMMETEH
WlRlNG DIAGRAM -----
PARTS LIST~ELECTRIC
EXPLOADED VlEW~MECHANlSMlCHAS$IS-
PARTS LlST~MECHANISM/CHASSIS'
SINCE 1887
YAMAHA
NIPPON GAKKl cu. LTD, HAMAMATSU JAPAN
2,5K~9a| (D Primed m Japan 34.7
Page 2
M-8O
.REAR PANEL
oU.S.A. and
Canadian Models
OGeneral Model
0 Australian Model
0 European Model