how do I test each pot / slider for defect?

Forum for JP-8000/8080 synthesizers from 1990's

how do I test each pot / slider for defect?

Postby busssy2333 » 06:01, 7 October 2016

I brought one of my JPs to a tech and he did an onboard test the JP has that shows if there's a problem with any of the knobs / sliders. I think it was something more than I know you can hold Shift and turn a knob and it should show on the screen something like 0 to 127 but I don't think he sat there and like slowly turned each knob and counted to make sure it read all 0 -127. I think there's something you can do that an * would pop up or something? I just want to test a used JP I bought.
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Re: how do I test each pot / slider for defect?

Postby busssy2333 » 00:31, 10 October 2016

In case no one replies, I found you can just google the service manual and find a pdf and it might be in there. also found on youtube a video called JP-8000 Diagnostic Test / Calibration (Run after battery replacement.)
https://www.youtube.com/watch?v=1NeC_9sLqvY

I should be able to figure it out from here on
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Re: how do I test each pot / slider for defect?

Postby scottrod » 02:04, 11 October 2016

Where are you located on the planet?
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