Moog MemoryMoog -1982    Weight=39 Lbs. Number mfg.= 3500 MRP=$4795

User Manual: DIY archive
Reset Proceedures: N/A
Operating System code: N/A
MIDI or other control protocol: N/A
Software related Links: N/A
Patches or knob settings: or Far too Good
Circuit Overview: below
Scematics/Service Manual: fdiskc archive or DIY pages or Hylander's PDF or Far too Good
Common Service Issues/Tips: below or User Group! or
Parts Sources: Keys knobs semiconductors misc
Uncommon chips/modules used: 19- CEM3340 VCO, 12- CEM3310 EG's, 26- CEM3360 VCA!
General Info Links: Vintage Synth Explorer

Circuit Overview:
     Moog's last synth with ...memory! These are not minimoog channels as some sites like VSE above indicate. The chips are curtis as you see above. Reportedly some of the charm of the mini has to do with the design of the vco's which...have instability that results in naturally varying pulse widths which creates an interesting tonal coloration. But still the memorymoog is one of the most fantastic synths of all time having 6 voices with 3 VCO/voice and does have the moog ladder filter design for each voice! I've recently aquired number 2110 and am beginning to work it over.

Service Tips:
     Dirty contacts galore! Deoxit and repeated button presses saved hours of time. The switches are open metal design so they're easy to get contact cleaner on at least. The keyboard is the classic panasonic. I discovered that this one was so badly fouled I couldn't get it to respond well with the usual acetone treatment I've used many times with success. I wound up taking a fine grinder on my dremel and facing them! Worked great. But you really have to have a good skill to keep from damaging the cups so I don't formally recommend that just anyone try this. You can simply put them in an envelope and send them to me if you want this done by an experienced tech. It's not a big charge if you've already removed the contact cups from the machine. Now onto dealing with why zero of the oscillators tune.

But in general just remember that these machines have a lot going on and any problem could be several things and you just have to remove things and watch what happens sometimes. Eg. A gurgling filter someone said recently turned out to be a leaky S+H channel on the DEMUX board. Reminiscent of a problem I had with a Siel DK600 that turned out to be the same except it went away when I got the 5V supply corrected because it was low and the signals being sent were high enough to cause a backward leak in that case but anyway.. these are complex machines so they take some time.

It appears most parts are available from me or someone. The CEM3340 has been reproduced (Contact for details. Reasonable price but I hear for now at least pins are a bit weaker on them). Other chips can usually be found somewhere.
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