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Yamaha M50 looking for schematics, service manual incomplete.
Yamaha M50 looking for schematics, service manual incomplete.
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Old 22nd May 2020, 06:04 PM   #1
gamerpaddy is offline gamerpaddy
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Join Date: Dec 2017
Default Yamaha M50 looking for schematics, service manual incomplete.

Hello,

i got a Yamaha M50 on the healing bench, but i cannot find a schematic for it.


One of the channel the 2SC2581 are shorted and the 0,33 ohm resistors are open. not sure if anything else is blown, was about to check with the schematic on hand before going in blind.



elektrotanya and hifiengine provides a service manual which mentions schematics on page 14.. but the scans i found only go to page 11.


Does anyone know a source for a full service manual or have one?

ive seen schematics on radiomuseum but you gotta apply for paid membership to see them...


thanks in advance!
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Old 22nd May 2020, 08:03 PM   #2
jony is offline jony  Poland
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Join Date: Jun 2004
Location: wroclaw
I download it from here:
Yamaha M-50 - Manual - Stereo Power Amplifier - HiFi Engine

And on pages 16 and 17 I can see a circuit diagram.

Or dawnload M70 schematisc.
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Old 23rd May 2020, 03:57 AM   #3
gamerpaddy is offline gamerpaddy
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Join Date: Dec 2017
Whoops i didnt saw them, i allready had downloaded this pdf and scrolled trough. the page might have not been loaded when i scrolled down so i missed it.

Thanks!
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