Electronic Repair

This is a very rare Gleeman Pentaphonic synthesizer from 1982. Only 50 of these were made, and of those 50, only 20 were built into these clear cases! When it got to my shop, it powered on, but made no sound or seemed to do anything else. It looked as though it suffered a fall, or some shipping damage at some point. The large transformer bolted to the back had stressed the plastic case enough to crack it, and pretty much every solder joint on the panel was broken. I replaced the dead battery, recapped the power supply and main board, replaced a couple of bad IC sockets, cleaned the key contacts, replaced the sequencer switch, cleaned the controls, and a lot of other little things to get it going again. This one was probably one of the last ones in production, as it already had the preset board and selector, and oscillators 2 and 3 can be transposed to create chords in unison mode. It's a three oscillator synth that can be played mono, or as a five voice "pentaphonic" poly synth. It can store 50 user presets, and it has 50 built in. The sequencer is real-time, and a delay can be added to the loop point also in real time. It's one of the coolest synths I've ever played!