Thanks for your help Ingo. I hadn't noticed this info on the FAQ page.
From this info it seems I should be using a slow blow fuse in the
range 630-800mA. But is this correct.....

....while I was searching for 800mA fuses (anything other than 500mA
or 1A is very hard to find in Australia), I noticed that that fuses
are rated for voltage. As I'm in Australia the fuses I'm finding are
rated at 240VAC. Given that I'm using a step down transformer for my
110v PSU2, should I be using an 800mA fuse thats rated at 110VAC
Could the fact that i'm using 500mA 240VAC fuses in a 110V PSU2 be
causing me my problem Sorry for my ignorance on all this :-(

--- In Doepfer_a100@yahoogroups.com , "ilanode" <techmeier@...> wrote:
>
> Hello Simon, even though you might have damaged one or more modules I
> don't think this is the reason for the constantly blowing fuses.
>
> Assumed by now all modules are connected correctly I suggest to try
> other fuses: "630 - 700 mA time lag (slow blow)". [That info is from
> Dopefer's HP -> FAQ.] Make sure they are SLOW BLOW/TIME LAG!
>
> Hope that helps, Ingo
>
> --- In Doepfer_a100@yahoogroups.com , "beakanddune" <beakanddune@>
> wrote:
> >
> > Hi People,
> >
> > I know that the topic of fuses has appeared a few times and others
> > have experienced similar problems but I'm not sure what to do about
> > this. Sorry about the long winded nature of the post but I don't want
> > to leave out any prudent info (including details of my own stupidity).
> >
> > I have an A-100P with a 110v PSU2. I'm in Australia so I'm using a
> > stepdown transformer that has a 250 VA rating. The A-100P is half full
> > and has been operating for the last month or so without a problem. I
> > recently added an A-118 (Noise) and an A-131 (VCA) and had no
problems.
> >
> > The other day I removed a few modules in order to fit the spring from
> > my A-199 and when putting the modules back in I accidentally plugged
> > my A-112 in incorrectly (I plugged the cable into the bus board
> > without plugging it into the left hand row of pins). When I powered
> > the unit on the lights came on momentarily and then no power. I then
> > realied my error and corrected it but it seems that the fuse in my
> > case had also blown. I replaced this with a 500mA time lag fuse and
> > this worked fine.
> >
> > Since then when I power the case on the fuse blows 80% of the time and
> > I've just run out of 500mA fuses. :-( Note that 1A fuses seem to
> > work fine but I'm aware that these are not recommended.
> >
> > I'm not sure whether this problem is being caused by :
> >
> > a. A now 'damaged' A-112 (still seems to work ok).
> > b. A damaged PSU2.
> > c. Unsuitable fuses.
> > d. Some other factor.
> >
> > Could anyone tell me whether I've likely broken anything and if there
> > is anything that could be causing the fuses to blow
> >
> > Thanks in advance
> >
> > Simon
> >
>