Patches and discussion for Ensoniq VFX family

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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