dead doepfer ps help

[Doug Tymofichuk]

On Tue, 09 Jan 2001 13:03:06 -0800 pelagius pelagius 
<pela_gius at hotmail.com> wrote:

> Gee, thanks for the help.  I guess you're saying that using 
> doepfer equip is bad for diy?  

There has been some trouble in the past with Doepfer 
allegedly "stealing" DIY circuit designs from list members 
and incorporating them into commercial products. So he is 
not a popular manufacturer on this list. Harry's reply was 
just a bit of fun sarcasm regarding this situation. 

Whatever.  The reason I'm 
> posting to this list is that I recently built a nice big 
> cabinet to house my doepfer modules so I can add blacet, 
> paia, and hopefully some diy stuff.  Unfortunately I'll 
> need some help since I'm a musician, not an engineer, but I 
> guess this list isn't the place to look for that help.

I disagree, you should be able to get your problem solved 
on this list, just ignore the comments that aren't helpful. 
(Or find them funny, like most of the rest of us)
 
> If anyone out there does have the heart to give me some 
> advice, here's the problem:
> When I put in a new fuse the power supply turns on for a 
> second and then the leds fade out almost immediately, and 
> the fuse is burnt out.  Does that sound like the circuit is 
> just dead, or is there any chance it's some kind of 
> grounding problem? 

It sounds to me that something is drawing too much current 
from the power supply, probably some type of short circuit. 
You should check to see what is different between the way 
it is wired now and how it was wired when it was working.

 My cabinet is made of wood, so I just 
> tried to attach the ground lug to the metal frame that the 
> power supply is bolted on.  Would that have fried the 
> supply?  

Are you refering to the mains ground or the DC ground? If 
it is the mains ground, then this shouldn't be a problem. 
Either way I would not expect it to damage the supply.

I really do not want to have to buy a new power 
> supply if there is just something dumb I'm overlooking.  I 
> also wouldn't want to buy a new ps and fry it as well if 
> there is some grounding issue I'm overlooking.  Any 
> thoughts would be greatly appreciated.
> 
Do you have the power supply connected to the modules yet, 
or is it blowing fuses just on it's own? Did it ever work 
at all? Some more information is neccesary for the problem 
to be determined, so post all the details you can.

Hope this helps,
Doug.

----------------------
Doug Tymofichuk
dougt at cancerboard.ab.ca