On Apr 13, 2005, at 5:46 PM, Hans Artmann wrote:
> The 1N4004 is referred to in the schematics. It's a rectifier diode
> with
> 400V/1A.
> Look for a 400V/1,5A (e.g. 1N5395).
> I don't actually think you need 'beefier' diodes. Find out which one's
> died and replace it with the original type.
>
> Hans
>
> -----Ursprüngliche Nachricht-----
> Von: paixwool [mailto:snowberry@...]
> Gesendet: Mittwoch, 13. April 2005 21:10
> An: Ensoniq-VFX-SD@yahoogroups.com
> Betreff: [Ensoniq-VFX-SD] Re: Power Supply Diodes
>
>
>
>
> Hi Dan----Can you tell me where you got those "beefier" diodes?
> Company and part number? I really need some!--Dorothy
> >
> > I wanted to chime in that Mission66 advised that I change out all
> the
> > diodes with beefier ones to try and fix my VFX, whose display went
> > semi dead one day. I changed them and presto chango, it all works
> > again. Thank you. This is what the forum is all about. Remeber the
> > warning is that you can't keep flicking it on and off to try
> to "jump
> > start it" or you may blow up the boards and I am sure there is no
> > return....
> >
> > Long live the VFX!!! Best MIDI controller in it's day and still
> today.
> >
> > Dan
> >
> >
> > --- In Ensoniq-VFX-SD@yahoogroups.com, "Hans Artmann" <hans-
> > artmann@t...> wrote:
> > > Dorothy,
> > > You might want to download the file power.zip from
> > > http://launch.groups.yahoo.com/group/Ensoniq-VFX-
> > SD/files/Tools/Schemati
> > > cs/
> > > There are some diodes CR1 to CR8 follwing the fuses. I can
> remember
> > that
> > > I had a dead display because one of the fuses was blown (I can't
> > > remember which one it was). So it could well be one of these
> diodes.
> > > Check the voltages given in the schematics to find out which
> > circuit's
> > > wrong.
> > >
> > > The power supply hasn't changed very much from the vanilla VFX to
> > the
> > > SD.
> > >
> > > I hope this helps,
> > > Hans
> > >
> > > -----Ursprüngliche Nachricht-----
> > > Von: paixwool [mailto:snowberry@c...]
> > > Gesendet: Freitag, 25. März 2005 21:25
> > > An: Ensoniq-VFX-SD@yahoogroups.com
> > > Betreff: [Ensoniq-VFX-SD] A question for Richard
> > >
> > >
> > >
> > >
> > > Hi there, In an earlier post you mentioned a diode replacement
> on
> > > the power supply board to correct the problem of the display not
> > > activating. I think I killed this diode by starting up when it
> was
> > > still very cold! Anyway, I have opened it up and checked
> > everything
> > > on that board; everything is labeled, but only found C1, C2, C3,
> > C5,
> > > R5, and R6 suspect by using a volt meter. So where is the
> diode?
> > > Those items sound like capacitors and resistors. Help please!
> > Dorothy
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > > Yahoo! Groups Links
>
>
>
>
>
>
>
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