Doepfer

Yesterday, I left my studio for about half an hour, and when I 
returned, one of my Doepfer cases had blown its fuse and there was a 
burning smell in the air.  

When I looked at the PSU, there was some black plastic like 
substance all around the power transformer, and it had dripped down 
onto one of the bus boards. At a guess, I'd say this may be a bad 
thing.

According to my numbers, I had about 635ma worth of modules in that 
case. All were Doepfer, except for one Blacet Mixer/Processor. 

Here is my first question: My 635ma calculation is based on rating 
the Blacet module at 35ma.  The Blacet website says it requires "+/-
35 ma." The ratings for Doepfer modules don't include this "+/-" 
before their power ratings. Is "+/- 35ma" the same as "35ma" or 
should I have doubled the Blacet power consumption when I added up 
the numbers?

Also:  Any ideas on why the fuse didn't blow before the transformer 
melted?  I had a 250ma fuse and I am running on 115v.

Anybody else ever have this happen?  Any advice? A replacement power 
supply isn't a whole lot of money, but I don't want to just fry 
another transformer.