On Sun, 13 Jun 2010 14:16:36 -0700, powerampfreak ǝʇoɹʍ:

I was given an oscilloscope, a Fluke PM3082 from a retired industrial
electronics engineer.
He said that during a measurement, the oscilloscope's powersupply just
bang and a flame came out of the rear panel. After this, the scope was
left for several years...until I got it. The mains fuse has really
exploded. Shattered glass in the fuse holder. A brief examination of the
primary side of the smps reveals no shorts. The smps is an ordinary
flyback supply. Mains rectifier ok, switch ok, snubber, line filters all
ok. Really don't know why the mains fuse went.
I just don't want to put a new fuse in and try again, not before I
investigate the cause.
Could an incorrect measurement setup cause the mains fuse to explode?
Anyone familiar with these scopes or perhaps has a service manual for
it?
Best regards
PAF

Flames out the back from an incorrect measurement set up? That would have
to have been one hell of a mistake.