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Re: [Doepfer_a100] Angry A100 blows many fuses !

2007-03-04 by Florian Anwander

Hi damaged_meat

> Hi all,
> I have an amazing problem with my A100 system : it seems to be very
> capricious and it sometimes (about 1/2 probability) blows the fuse on
> power up. The case is a brand new portable suitcase (version 2). I
> tried different types of fuses (200 315 slow or fast, 500 fast), the
> 315 and 200 sometimes work, sometimes blow, the 500mA i tried blew on
> the first attempt but it was not a slow fuse so i guess it's normal.
> 
> I checked the electric circuit of my home and it's round 238-240 V.
> 
> The thing that really amazes me (i don't know if that's the right
> word...) is that the system sometimes work, and sometimes the fuse
> blows. I removed all modules and re-installed them all, nothing seems
> to be wrong inside the case ...
> 
> Is there a simple solution to this problem (special fuse, higher
> current value) ? What is this fuse protecting ? What happens if you
> replace this fuse by a conductor ? Are there some things not to do
> that i should know about modules patching on power up ?
According to http://www.doepfer.de/a100z_e.htm the Powersupply II uses a 
transformer with 1200mA instead of the 650 mA of the old transformer. 
Also the the torroid transformers used in the new powersupply draw more 
current when switched on. So I assume that 400mA are definitely not 
enough for the fuse.

I think Dieter will jump in here on monday...

Florian

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