Yamaha m 70
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Extracted text from yamaha m 70 (Ocr-read)
Page 1
STEREO POWER AMPLIFIER
S7.
SERVICE MANUAL
.FRONT PANEL
® YAMAHA mum sown um.
w... "us = 2: .3, 3 - 4. :.|.
- = - _- u \- l
M __ 7 .ea 2 - __ - :
m --- 2: 2:: :: -_ :1". .. "2": .
5% :2: :2 :: --- 4: éI§.j-§.3|
m!" |_ °---
6 O 0 0
0 POWER SWITCH 6 RANGE INDICATOR
0 PROTECTION INDICATOR 0 PEAK POWER INDICATORS
9 PEAK HOLD SWITCH 9 SPEAKER SELECTION SWITCHES
0 RANGE SELECTION SWITCH 9 SPEAKER LEVEL CONTROL
0 METER OFF SWITCH
.CONTENTS
REAR PANELS ................................................................... 1
SPECIFICATIONS ................................................................. 2
INTERNAL VIEW . . ............................................................... 3
DISASSEMBLY PROCEDURES ................. ; ...................................... 3
ADJUSTMENT ................................................................... 6
CONTROL C. BOARD/SCHEMATIC DIAGRAM (General model) ................................. 9
CONTROL C. BOARD/SCHEMATIC DIAGRAM (British, Australian and European models) ................ 10
BLOCK DIAGRAM ................................................................ 11
PRINTED CIRCUIT BOARD .......................................................... 12
WIRING DIAGRAM ................................................................ 13
SCHEMATIC DIAGRAM ............................................................. 14
O YAMAHA
004452 NIPPON GAKKI COT. LTD. HAMAMATSU. JAPAN
aned In Japan 2.82 n @- 2 .65K
Page 2
I
IREAR PANELS
V u.s. & CANADIAN MODELS
V GENERAL MODEL
[WEE l I
[£-
7 BRITISH & AUSTRALIAN MODELS o 9 9 0
v EUROPEAN MODEL 0 9 9 (.3
GINPUT TERMINAL @AC OUTLET
9 GND TERMINAL 0 VOLTAGE SELECTOR
@SPEAKER TERMINAL A
QSPEAKER TERMINAL 8