Akai AX60 -1985    Weight = 25 Lbs. Number mfg.= ? MRP=$895


User Manual: Soundprogramming.net or Manual Manor
Reset Proceedures: N/A
Operating System code:
MIDI or other control protocol:
Software related Links:
Patches or knob settings:
Circuit Overview: below
Scematics/Service Manual: soundprogramming.net or Manual Manor
Common Service Issues/Tips: below
Parts Sources: Keys knobs semiconductors misc
Uncommon chips/modules used: CEM3394 synth on a chip, LM13600's, D7811, D8279C, 8253, DAC-MD6205, MN3009 BBD's/MN3101 clock
Modifications:
General Info Links: Vintage Synth Explorer





Circuit Overview:
     A digitally controlled analog subtracive synth with sliders. Similar to Sequential Six-Trak in sound no doubt but easier control of course. I finally got one of these in here and it's a great machine for the money as I'd heard. AX73 loses knobs but has velocity and more keys of course but otherwise very similar. NOTE: Patch changes via MIDI respond on two channels in non-split mode! Bummer. So like if you set it to channel 11 it will also receive MIDI patch change on 12. In split mode this obviously operates on two different halves of the keyboard but in non-split it's just a pain :-)


Service Tips:
     If a voice is out obviously the CEM3394 is probably gone. These have the familiar rubber cup keyswitches which by this age are often failing. Acetone swabbing conductive surfaces often will cure the ailment. In general hold probes near each other on the surface of the conductive material in the rubber cup and you should get 500 ohms or less if they are really ideal. SOmetimes they work ok up to near 1K but beyond that good luck. I've had excellent results by acetone then rubbing until you see a good amount of black on the swab.


Parts:
Let me know if you need a specific part from my listings in the parts section. I have some CEM3394 chips if you are in a pinch.
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