Prophet VS service notes
2015-09-02 by totallynuss@...
Does anyone have the service notes for the VS. All I could find were
schematics. Is there some sort of diagnostic/calibration/engineering
mode?
Thread
Prophet VS service notes
Re: [prophet_vs] Prophet VS service notes
2015-09-02 by Jason Proctor
i have a document entitled "preliminary service data". it describes six diagnostic routines -- LED, ADC, NV RAM, I/O Toggle, Output, and Keyboard.
to enter diagnostics mode, hold down switches 0 and 2 while powering up. the display should then tell you you're in diag mode. after a while a prompt comes up, hit the Name button to page through the tests and the Enter button to run the test.
careful, some of them are destructive, though the mode does warn you.
i might have an electronic copy of this around, i'll check. if i find it i will put it in the files section.
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On Wed, Sep 2, 2015 at 2:40 PM, totallynuss@... [prophet_vs] <prophet_vs@yahoogroups.com> wrote:
Does anyone have the service notes for the VS. All I could find were schematics. Is there some sort of diagnostic/calibration/engineering mode?
Re: [prophet_vs] Prophet VS service notes
2015-09-03 by Jason Proctor
i found the electronic copy, it's just the schematics. can't guarantee to get round to scanning the paper version any time soon, but i can answer questions etc.
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On Wed, Sep 2, 2015 at 4:59 PM, Jason Proctor <jason@...> wrote:
i have a document entitled ";preliminary service data". it describes six diagnostic routines -- LED, ADC, NV RAM, I/O Toggle, Output, and Keyboard.to enter diagnostics mode, hold down switches 0 and 2 while powering up. the display should then tell you you're in diag mode. after a while a prompt comes up, hit the Name button to page through the tests and the Enter button to run the test.careful, some of them are destructive, though the mode does warn you.i might have an electronic copy of this around, i'll check. if i find it i will put it in the files section.On Wed, Sep 2, 2015 at 2:40 PM, totallynuss@... [prophet_vs] <prophet_vs@yahoogroups.com> wrote:
Does anyone have the service notes for the VS. All I could find were schematics. Is there some sort of diagnostic/calibration/engineering mode?
Re: Prophet VS service notes
2015-09-04 by totallynuss@...
Thanks Jason. I ran all but the memory test because I need to backup my patches. Everything tested good. Any info on calibration procedure would be great.
Re: [prophet_vs] Re: Prophet VS service notes
2015-09-04 by Jason Proctor
are you looking for anything specific?
the output diagnostic lets you fiddle with the voice volumes, cutoff frequencies, and pan settings of the voices individually.
the only other calibration type things are a pointer to the pressure trimmers on PCB 3 with instructions on the correct voltages, and trimming the chorus clock.
there's nothing else in the document that i have. i found an invoice from Wine Country in the back of the manual which describes it as "Prophet VS Technical Manual". i don't konw whether there's another service manual.
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On Fri, Sep 4, 2015 at 9:54 AM, totallynuss@... [prophet_vs] <prophet_vs@yahoogroups.com> wrote:
Thanks Jason. I ran all but the memory test because I need to backup my patches. Everything tested good. Any info on calibration procedure would be great.
Re: [prophet_vs] Re: Prophet VS service notes
2015-09-05 by totallynuss@...
When I turn it on there is a oscillating sound on every patch and it's always on. It varies with the patch. Volume is always at full too. Would that point to the 5530s? Notes still track but there's always the drone sound present. I just ordered two clones from Straylight Engineering. I'll put them in and see. Good to have spares either way apparently.
Re: [prophet_vs] Re: Prophet VS service notes
2015-09-05 by totallynuss@...
Also, is the data slider part number the same as I've found on line? ALPS RS6011YA6009? I have the rack version not the keyboard. I've been reading someplaces that they are not the same part.
Re: Prophet VS service notes
2015-09-17 by berada@...
I just uploaded a Pro VS cheat sheet. I got this years ago from a now defunct Pro VS website. It contains some of the info that you've been discussing.
The website it came from had information on repairing the aftertouch as well, alas, the site is no more and I didn't take a copy of that info... which I had, one of my VS's aftertouch has gone.
Re: Prophet VS service notes
2015-09-17 by totallynuss@...
Thanks a lot. This is very helpful. Just getting to know my newly acquired VS rack. Replaced the joystick which was totally gone. In the process of installing an OLED and a new slider; which has a snapped off shaft but still works. Anyone have a good match for the slider knob? Something that would fit on the new ALPS replacement I have? I see the wine country gougists are sold out.
Re: Prophet VS service notes
2015-09-18 by berada@...
Try getting a linear slider to replace the log slider. Its nice to have proportional data entry :)
Re: Prophet VS service notes
2015-09-18 by berada@...
Oh, and knob wise, One of my VS's was missing a knob, I used a black mixer fader knob to replace the missing one. I find it easier to use than the original.
Re: Prophet VS service notes
2015-09-18 by totallynuss@...
Thanks for the info. I made the mistake of ordering the ALPS slider which is linear 10K but only fits the keyboard. I've now ordered the jason Bourns slider that fits the rack and 440. It's linear 10K and has the same pin configuration. It's also nowhere near the $25 cost from Wine Country. Got to love their grotesque 1462.5% markup. Thanks WC for all the goodwill towards us Sequential users!