[help] Xwhatsit for 5251 going haywire unexpectedly

raycewest

27 Jun 2018, 23:40

Had one for my first 5251 that worked for months. Acquired another 5251 to restore, tested it with the same Xwhatsit controller with the same configuration (~131 voltage threshold, solenoid on) and everything worked perfectly. Put it back in the first keyboard and at some point (not sure if right away, or later) the sensing went way out of whack - a 130 threshold now registers a bunch of keys pressed down, dropping it to 120 detects nothing. I switched it to the new keyboard again, this time getting around the same whacky result. Can't find any unwanted solder bridges, swapped usb cables, and I don't think I did anything wrong. Anyone here have a similar issue? Thanks for any advice.

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PlacaFromHell

28 Jun 2018, 00:16

Maybe you accidentaly burned it with static. Just to be sure, did you put the ground cable it? Sometimes we forget this things.

raycewest

28 Jun 2018, 00:18

I did - albeit not tightened all the way down. It should've had contact though. Maybe a loose one KO'd it? Any way I could test to confirm if it did or didn't?

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PlacaFromHell

28 Jun 2018, 00:26

Sorry, I didn't understand correctly your first message. Don't worry, it's not burned. Verify your screws in the two keyboards, I had problems with a loose one who caused a similar issue. The controller seems to work but for some reason it's acting strange, and with the two keyboards. If at least works with the software something strange should be occurring between the keyboards and the controller.

raycewest

28 Jun 2018, 00:34

Strange. It's fine now; I suppose I didn't have it tightened enough when I was investigating, or forgot it entirely. Thanks much!

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