Good, clear copy of 2475-65 schematic

mbaber1

I just replaced the PT on my MM 112 sixty-five, vintage 1977. It is working but still has a distortion problem in low power. I do have schematics but every copy I find for this chassis is very blurry. I think the 2275-130 schematic is the same except for the finals so I you can get by. I would just like to have a clear copy to save my eyes. Thanks to anyone who can find one for me. Mike

Sorry for the typo in 2471 vs 2475. This may not be in the proper place on the forum, I am sorry if it isn't. Mike

Full Name
Ian Azrikan

Member for

12 years 3 months

inertian Sat, 09/09/2017 - 20:22

I emailed Steve a gif and pdf copy of the originals that came with my '74 210 Sixty-Five some time ago, don't see it on the site, but send me your email address and I'll send you a copy.

Ian
enginears@hotmail.com

Full Name
Michael Baber
Music Man Equipment
MM 112-65 Amp, 1977 vintage, currently with bad power transformer. Replacing filter caps before I get it fixed.

PRS custom 24 guitar Tampas Green
Squire Strat
Ovation Ballader

Successful transformer replacement, amp is now working. One of the capacitors on the rectifier shorted and took the power transformer out. Don't wait for that to happen to you before you do the cap replacement. I drew schematics and layout drawing of the rectifier board before I started. I was getting funny resistance readings with the old transformer still in the circuit and I wanted to be sure of what was there before I started. The schematic of my amp was blurry and hard to read and there are no drawings of any of the boards, that would be really handy to have. Note: it looks like there are only 2 power supplies used so check other model amplifier schematics to get one you can read better. Also found out that the drawing in the MM service bulletin does not match the 100-65 transformer from Mojotone. Andy Johnson kindly supplied me with the data sheet for their transformer. Aug. 22, 2017

Member for

8 years 11 months

mbaber1 Sun, 09/10/2017 - 13:40

Ian,
thanks for the rapid reply. I have already emailed you. I was originally going to say I wanted the PDF file but being able to edit the GIF file might be nice too>

Thanks, Mike

Full Name
Ian Azrikan

Member for

12 years 3 months

inertian Sun, 09/10/2017 - 17:00

Mike -

Sent you the gif and pdf schematics, if you have any questions please post here or email me directly.

I have a '74 210 Sixty-Five that I am trying to get healthy (distortion at low volume) and a '76 410 Sixty-Five I am recapping.

Good luck getting your amp running, be interested to hear what you found the source of the problem to be.

Full Name
Christian Fortner
Music Man Equipment
HD 130

Member for

5 years 1 month

cfortner Sun, 07/18/2021 - 06:18

In the internet you can find only the blurry schematics.

If it would be possible, can you send me a copy of the 2475-130 schematic (12ax7)?

Thanks a lot

Chris

Full Name
Ian Azrikan

Member for

12 years 3 months

inertian Mon, 07/19/2021 - 09:40

I only have the 2475-65 schematic, message me your email address and I'll send it out to you tonight.

Profile picture for user mm210
Music Man Equipment
MM 2-10-65

Member for

12 years 3 months

mm210 Thu, 07/29/2021 - 17:26

Here's a good clean copy in jpg and pdf. I COULD email the full sized scan if anybody wants it. It's too large to post here. Mike.

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2475-130.pdf 714.58 KB
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