Abstract: An audio control system comprised of an equalizer which divides and controls the level of a plurality of audio frequency bands and an electronic display which provides an illuminated indication of equalizer settings and output levels in each of the audio frequency bands. The audio control system can receive stereophonic input from one of several sources and provide an output to front and rear pairs of amplifiers. The electronic display is comprised of a plurality of light-emitting diodes arranged in columns which provide either a static display of equalizer settings or a calibrated display indicating the output levels in each audio frequency band of the equalizer.

Abstract: In a wet cycle copier of the small tabletop mounted variety, conversion is made for vending in the absence of frequent key operator attention. Incidence of power interruption provides for a soak cycle to occur wherein the liquid toner is cycled through the machine without drum rotation. Rotation of a glass selenium coated drum against a dried and abrading liquid applicator is avoided. After the soak cycle and assuming uninterrupted power, a cleaning cycle is initiated once every 24 hours. Assuming a lack of machine use, this cleaning cycle lubricates both toner application roller and drum to assure a wet toner applicator. Dispersant replenishment is supplied from a large volume reservoir under logic control with provision made for automated machine shutdown where dispersant on demand is not supplied. Provided modes of operation include coin vending, countermechanism vending and direct owner access vending with a tamper proof interface between the provided modes.