Yamaha M-80 Technical Bulletin discovered!!! - diyAudio
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Old 6th February 2011, 03:48 PM   #1
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Default Yamaha M-80 Technical Bulletin discovered!!!

I stumbled on one of the mythical Yamaha M-80 Technical bulletins! Supposedly there are three and I think this is the first one. There is no copyright stated on this doc. The Yamaha tech experts over at AK have verified that it is one of the documents.

I have a crippled M-80 and I just used a bunch of different search engines and got lucky! I usually hang out at audiokarma and I will gladly contribute this to diyaudio or members.

If anyone wants it or would like to upload this to the site, i'll post it.
The document is dated 3/15/86

No. 66H
Serial number 2401 and below
Mandantory
Five circuit changes are documented with a schematic snapshot

If anyone knows where I could access the other two Technical bulletins it would be greatly appreciated!


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Old 6th February 2011, 04:45 PM   #2
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I have SM for M-80 ;

24,2 MB but sorta PITA to read - pretty lousy scan work

anyway - it helped to repair one tricky M-80

2.6K-981 . printed in Japan 84.7

feel free to send that schmtc to me and say if you need SM

my addy is >sasica5@gmail.com<
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Old 6th February 2011, 05:10 PM   #3
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Fortunately, I have the OM and SM in softcopy. AK and hifiengine.com have extensive libraries at no cost.

I'll send you the TB.

I tried to attach it to my original thread but the moderator might have stripped it off. that's OK if those are the rules.

Last edited by Helpdesk; 7th February 2011 at 12:19 AM. Reason: removed email address
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Old 6th February 2011, 06:00 PM   #4
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tnx - received and replied ( so I didn't saw here that you have SM )

ask mods to remove your e-mail addy , written here in open - that's free target for spam
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Old 6th February 2011, 07:59 PM   #5
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Thanks for the warning. I will. I responded thru my email account and I thought it wsa going right to your email instead of to the forum.
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Old 13th May 2014, 06:40 PM   #6
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Has anyone else discovered any other M-80 Technical Bulletins since I started this thread?

I think there were 3 but as far as I know only this one has been published on the interweb.

Thanks in advance!
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