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 Forum index » Instruments and Equipment » General Discussion
Akai AX80 service manual
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XpanderXT



Joined: Oct 22, 2007
Posts: 133
Location: the flat universe

PostPosted: Mon Feb 25, 2008 6:08 pm    Post subject: Akai AX80 service manual Reply with quote  Mark this post and the followings unread

Anyone know where I might be able to download or get a copy of an AX80 service manual?

I just got an AX80 and need to fix a dead voice. It also has the famous 'right hand buttons' not working thing but that is an easy fix.

I would love to find the calibration routine for the unit too so I can get it tweeked out.

thanks,
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FredM



Joined: Nov 17, 2007
Posts: 2
Location: U.K.

PostPosted: Wed Feb 27, 2008 11:41 pm    Post subject: Reply with quote  Mark this post and the followings unread

I believe the AX73 voice circuit is similar or identical. Service manuals for AX73 are available (if you really cannot get one, I could scan some pages from mine for you).
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XpanderXT



Joined: Oct 22, 2007
Posts: 133
Location: the flat universe

PostPosted: Thu Feb 28, 2008 8:05 am    Post subject: Reply with quote  Mark this post and the followings unread

thanks for the offer. I found a service manual.
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MrSlippery



Joined: Apr 10, 2008
Posts: 1
Location: midwest usa

PostPosted: Fri Apr 11, 2008 12:03 am    Post subject: Reply with quote  Mark this post and the followings unread

I have just picked up an ax80 from a friend who lost interest in it. I am having a blast with it, but there are about 6 dead keys that I would like to fix. Any information / schematics could really help me out.
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ar2jr



Joined: Mar 29, 2008
Posts: 88
Location: San Francisco
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PostPosted: Thu Apr 17, 2008 12:33 am    Post subject: Reply with quote  Mark this post and the followings unread

i too have an ax80 that needs some work. what exactly is the famous right hand controls problem as that's one problem with mine.

-matia
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ar2jr



Joined: Mar 29, 2008
Posts: 88
Location: San Francisco
Audio files: 1

PostPosted: Fri May 09, 2008 9:48 am    Post subject: Reply with quote  Mark this post and the followings unread

anyone?
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Dego



Joined: Apr 22, 2008
Posts: 139
Location: Sweden

PostPosted: Mon Dec 01, 2008 5:30 am    Post subject: Reply with quote  Mark this post and the followings unread

Anyone got the AX-73 service manual? I need to change the sliding potientometers on my AX-73. Does anyone know what values they are?
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sounddoctorin



Joined: May 09, 2009
Posts: 4
Location: Bozeman, MT

PostPosted: Sat May 09, 2009 4:36 pm    Post subject: Reply with quote  Mark this post and the followings unread

The AX80 is no relation to the other AX series. It has only saw cores digitally controlled it appears. haven't seen the schematic but have examined the board. No transistor pairs heat sunk together, no vco chips etc. Just the CEM3372 VCF and an op amp and a couple transistors discrete per channel so not VCO based for sure. (And no auto-tune). The other AX's do have auto-tune because they use the CEM3394 synth on a chip with real VCO inside. Akai confused everyone by starting out with dco's and went to vco's afterward.

I have a VX-90 I was looking for schematics for. It's the rack of the AX-73 that I have on ebay at the moment. Figure I'll get the rack working and I really don't need another big keyboard around. hehe. No sign of manual so far.. if anyone knows drop me a line. -Bob
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Paradigm X



Joined: Feb 15, 2011
Posts: 281
Location: Null and void

PostPosted: Mon Jan 07, 2013 10:05 am    Post subject: Reply with quote  Mark this post and the followings unread

Anyone ever find one of these?

Id love a copy if poss

Many thanks, Ben
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sounddoctorin



Joined: May 09, 2009
Posts: 4
Location: Bozeman, MT

PostPosted: Mon Jan 07, 2013 12:00 pm    Post subject: Reply with quote  Mark this post and the followings unread

Paradigm X wrote:
Anyone ever find one of these?

Id love a copy if poss

Many thanks, Ben


I finally purchased a copy. If you have some specific question just contact me and I can check it out for you.
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Paradigm X



Joined: Feb 15, 2011
Posts: 281
Location: Null and void

PostPosted: Tue Jan 08, 2013 3:16 am    Post subject: Reply with quote  Mark this post and the followings unread

Thanks, very kind.

It is actually working very well, i was just thinking about how easy it would be to add potentiometers for the filter cutoff and resonance, and possibly others. it looks reasonable from the cem3394 datasheet, but i dont want to start hacking away without a schematic.

If thats easy enough to scan and or post that would be great.

Thanks.

Ben
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