Patches and discussion for Ensoniq VFX family

correct
a beefer speced diode wont do anything more
diodes are pretty basic
i would replace with exact part # called for

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
>
>
>
>
>
>
>
>  Yahoo! Groups Links
>
>
>
>
>
>
>
>
>
> Yahoo! Groups Links
>
> 	• 	To visit your group on the web, go to:
> http://groups.yahoo.com/group/Ensoniq-VFX-SD/
>  
> 	• 	 To unsubscribe from this group, send an email to:
> Ensoniq-VFX-SD-unsubscribe@yahoogroups.com
>  
> 	• 	 Your use of Yahoo! Groups is subject to the Yahoo! Terms of 
> Service.
>
>