What To Do If Yours Works - Always play the synth on a bench, table or other flat surface. This can also cause the circuit board to break too. Also, the chassis doesn't have supports to keep the synth flat so if you play on a keyboard stand, eventually it will bow and fuck up the sensors. What's The Problem? - The sensors suck, but also receive too much voltage causing them to be even more likely to fail. See the resources thread below for options. What To Do If Yours Is Broken - You can replace the voltage regulators as a quick fix, but replacing the entire power supply is the best choice. What To Do If Yours Works - Kinda depends on what you want to do, you don't HAVE to do anything, but it makes sense to future proof it or at least modify it to throw less heat. The heat can cause issues elsewhere in the synth. What's The Problem? - Prone to failure, also runs hot & buzzes. Either way, you either fix it or you own a brick. Otherwise, you'll need to look into one of the clone options listed down in the Parts Resources. One, you could try and find originals but they're few and far between an expensive. What To Do If Yours Is Broken - You have a few options. Either way, make plans for when they fail, because they will. There's also talk of Pentium 1 chips being the same size so a fan could work here, need more info. Clean the chip, dollop with a little Loctite Super Bonder 498 thermal cycling resistant glue and toss a heat sink on there. What To Do If Yours Works - Thank your lucky stars, and then apply heat sinks. They are system critical: no CEM5530, no synth. What's The Problem? - They run very hot and are prone to failure, and this heat issue is exacerbated in the cramped quarters of the VS Rack. Previous update added Digikey part numbers for VS switches, added a bit of I-625 info, added a bit of OS 1.1 info fixed some grammarįailure Point - CEM5530 30-Channel Sample & Hold multiplexer used like VCA's to handle oscillator mixing. Last Update, added I-626 Keyboard Controller clone info This is a collection of a lot of other people's work, threads on forums, old Synth DIY lists and a LOT of googling so this thread stands on the shoulders of giants. I've decided to create the Definitive Resource Thread for the Sequential Prophet VS.
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