Vintage Synth Repair

>>Major Problem: "Brain Dead" (no sound or lights) This problem slowly became worse over the past few months... First it would just lock up every once in a while and i would just turn it off and then back on... a few weeks later, the lights and display started flashing and then it went completely brain dead.<<

check the condition of any & all ribbon cables, connectors & socketed chips. read the story of the LAMM on the linntronics site. most of the MM's problems were due to poor connections, especially the power supply, & even my LAMM occasionally needs something pushing home after it's been moved. if you can, measure the power supplies where they arrive at each board, make sure you're getting the full voltage.

half the problem with servicing the MM is that it's a nightmare inside, & the first glimpse of this rat's nest can be a bit daunting.


>>Minor Problem:  "Self Editing" The Memorymoog display would randomly show the current position of the Voltage Controlled Amplifier's "Release control" even though it hasn't been touched by anyone.<<

sounds like a A>D gone bad, or else a noisy pot... more likely the former. could be related to the poor connection problem too. if the brain thinks this pot has been moved, it will switch the display to show the new value.

let us know how you get on- that's part of the usefulness of a list like this.

duncan.