Hey everyone!
I built an Arachnid recently (with a Modul8 chip). Worked great for a month or so, but then it started acting all sorts of wonky. The blend and volume work fine, but it sounds like the FV-1 is using its demo programs or something, and even then, they sound glitchy. I stuck a multimeter in some key points, and sure enough, most of the grounds within the PCB are reading at about -1.7V.
Pin 1 of the voltage regulator is at +1.7V and pin 2 is -1.7V. All of the grounds and V+ pins on the ICs reflect those voltages. When I disconnect power, though, my multimeter reads ~0 resistance between these -1.7V pins and chassis ground. I'm hoping someone more experienced than me can think of a simple cause and solution before I pull everything out. I can post a pic later when I get the chance.
If nothing else, would someone happen to have a picture of the back of the PCB so I can see where all the traces go?
Thanks!
I built an Arachnid recently (with a Modul8 chip). Worked great for a month or so, but then it started acting all sorts of wonky. The blend and volume work fine, but it sounds like the FV-1 is using its demo programs or something, and even then, they sound glitchy. I stuck a multimeter in some key points, and sure enough, most of the grounds within the PCB are reading at about -1.7V.
Pin 1 of the voltage regulator is at +1.7V and pin 2 is -1.7V. All of the grounds and V+ pins on the ICs reflect those voltages. When I disconnect power, though, my multimeter reads ~0 resistance between these -1.7V pins and chassis ground. I'm hoping someone more experienced than me can think of a simple cause and solution before I pull everything out. I can post a pic later when I get the chance.
If nothing else, would someone happen to have a picture of the back of the PCB so I can see where all the traces go?
Thanks!
