OT: Vibro Champ problem

[gez]

Sorry to bring this here but my question over at Ampage has brought no responses!  My Silver Face Vibro Champ bit the dust yesterday, well partially.  It cut out while I was tweaking a circuit and produced a buzzing sound followed by a slight burning smell.  I immediately turned the amp off.  I’ve checked over it today and have a few questions.

1.  Where the hell are the filter caps?  Sorry to get technical here, but are they in the cylindrical metal thing hanging down from the chassis?   The pins of this thing match with where they should be so they’re inside?  How do I get to them?

2.  Is it likely one has gone leaky?  I intended to re-cap this thing in January but I may have left it too late.  Was the ‘buzz’ sound motor-boarding?  

3.  If I HAVE got a leaky cap (or two), what is the likelihood that the transformer  will have been damaged?  How can I check for this without turning on the mains supply?  Check it’s DC resistance?  If so, what would that be?

I measured for voltage at the points where the filter caps should be and there was a residual amount left.  Having drained this off (you should see the burns on my tongue! - OK, so I used a couple of resistors to do this), I checked all the resistors and none have fried, the valves look OK and I can’t see any immediate signs that anything has fried.  The burning seemed to come from the opposite end to where the transformer is, but it all looks ok that end.

I’m pretty clueless when it comes to valve amps.  I understand how they work, but other than basic maintenance I don’t have a lot of  hands on experience.  All advice will be greatly appreciated!  Thanks.

Gez