Yamaha M-80 humming/chattering noise...

Teron

Well-Known Member
Left front corner...

Just started a few minutes ago...

Sounds like a fluorescent ballast humming.

Shut it down, unplugged it.

Common problem? Anyone have ideas on what is happening?
It was warm, but no more than usual, has been on for past 5 five hours. I leave it in NON class A mode as Class A gets toasty and I don't hear a difference.
 
I had to "strap down" the power transformer on my Yamaha RX-1100u. I didnt actually stap it down but I placed an appropriate sized piece of wood between the transformer an housing cover. Tightened all the screws and no hum for the past 2 years. Low tech but that's me:)
 
Anyone have the M-80 service manual? It does not appear to be in the database...
 
Hi Teron,

I have a copy of the M-80 service manual. Just wrote to the administrator of the AK Yamaha database about uploading for everyone. Right now each page is a separate jpeg file. I can email some or all to you if your email can handle the attachment size. It's about 1Mb for each of 20 pages.

John
 
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