Re: [AH] Help, my Jp-6 has locked up. :(
1998-10-28 by Verschut, Ricardo
From: Kevin Lightner @ synthfool@...@SMTP@EXCHANGE >synthfool@... wrote: ><< Not to totally pounce on Elhardt, but this is just plain bad advice! The >odds of the prom causing this problem due to "dropped bits" is HIGHLY >unlikely. (Extremely unlikely)>> > >It depends whether it is a prom or an EPROM. EPROMs were never ment as long >turm permanent data devices. They can lose data over time. Korg agreed with >me that it was probably the EPROM in my VP-70 that was bad. I also had a >serial interface computer board that locked up because of an EPROM that lost >data. I erased it, reprogrammed it and then it worked. If a device gets part >of the way through its bootup but then locks up in the middle, that usually >means the computer is running OK. The computer freezes when it hits a bad >instuction. However I don't know how the guy's JP-6 behaves so I can't give >any absolutes. No wars please. It's just my opinion as someone that's fixed a lot of synths that it wouldn't be the first advice I'D suggest. It's far more common for a locked up synth to have a power-up reset problem, power supply problem or bad solder connection. Proms can go bad, but it's comparatively rare to encounter. The JP6 has several CPU's and they all handshake- it's a complex instrument and many things can cause it lock up. K