AIM LDO (Low Distortion Oscillator) 501

[tattus123]

Does anyone have a schematic or manual for this beast?

It's a microprocessor controlled audio oscillator but unfortunately has an intermittent problem with the range control buttons locking up.

The attached jpeg is form the October 1985 advert in Studio Sound magazine.

[Kleinstein]

Even without a manual, may first suspects would be old caps in the supply and maybe oxidized contacts of switches and relays. For the contacts it may be enough to do a little exercise by switching them several time. Sockets might be a problem to.

Such old computer parts might also get close to EPROM data retention time.