Synth-DIY Yahoo! Groups Archives

Try unplugging all cables and boards to the power supply then power on and see if the fuse still blows if it does it is something on the power supply board if it does not, plug in cables one at a time until it blows again the one you plug in that causes it to blow is where the problem is, I got my VFX at a garage sale and it wasn't working and being an electronic tech i used this aproach to fix it. It turned out to be the floppy drive cable was pinched and grounding out against some metal.

Leo

--- On Sun, 1/18/09, markbreton@... wrote:

From: markbreton@...
Subject: [Ensoniq-VFX-SD] Re: sd1 battery died, changed, still get low voltage message
To: Ensoniq-VFX-SD@yahoogroups.com
Date: Sunday, January 18, 2009, 1:22 PM

as per a previous post, i found a bad fuse, changed the fuse, powered
up, and didn't get the low voltage message. Plugged in the
headphones, same crappy sound. powered down, powered up, got the low
voltage message; the fuse had blown. so i definitely have a power
problem. i don't have a schematic, and am a little to ignorant to
look at the diodes and see what is what. i am thinking about sending
it out to TheSoniq and having him run it all down.

--- In Ensoniq-VFX- SD@yahoogroups. com, "John"
wrote:
>
> This sounds similar to a problem I had except, all I got was the
> "battery low" warning, no sounds. The battery voltage is compared
to a
> voltage from the PSU. So if this becomes unstable.
>
> In my case a diode had blown on the bridge rectifier. I believe
there
> are 6 and if ones gone it might be an idea to change all 6.
>
>
>
> I hope this helps.
>
>
>
> John
>
> -----Original Message-----
> From: Ensoniq-VFX- SD@yahoogroups. com
> [mailto:Ensoniq-VFX- SD@yahoogroups. com] On Behalf Of
> markbreton@. ..
> Sent: 16 January 2009 22:55
> To: Ensoniq-VFX- SD@yahoogroups. com
> Subject: [Ensoniq-VFX- SD] sd1 battery died, changed, still get low
> voltage message
>
>
>
> bought the battery off ebay, reads 2.97 volts. metered the
mainboard,
> power is getting to where it should. the display lights are dim,
the
> buttons change presets but what tiny little bit of sound that comes
> out is the same no matter what. it sounds like a sawtooth, doesn't
> change pitch no matter which key i hit. the sequencer will not stay
> loaded. i read the posts and saw somewhat similar problems. do you
> think it is the main power supply or a cap that regulates it? has
> anyone dealt with www.thesoniq. com for repairs? anyone have a
> schematic source?
> thanks so much, i am glad to be a part of this group!!
>

Patches and discussion for Ensoniq VFX family

Re: [Ensoniq-VFX-SD] Re: sd1 battery died, changed, still get low voltage message

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