I was wondering: are these two items regular off-the-shelf electronic components available from just about any electronics supplier at low cost or are they made to custom specs by Canon only making them hard and expensive to replace yourself?
The IGBT is most likely off the shelf, perhaps w/o or with a custom label, the tubes aren't that common.
But without knowing wether its just about part specs or their alignment that doesn't say much.
I think I found it! According to the "580EX II failure report"
by LPA designs (Pocket Wizard) they identify the IGBT as:The testing quickly revealed that an IGBT (transistor) within the flash is damaged. This part is made by
Renesas (part # RJP4301).
I looked up the Renesas website and found several versions of the RJP-4301 so I'll probably have to physically open up a 580EX II if/when needed in order to identify the exact component number. I didn't find anything about the xenon tube other than Canon having the complete tube/reflector assembly available as a spare part. I do however see that you can buy xenon tubes on their own at ebay for around US$ 10 (search for"canon 580ex II xenon tube" at ebay) though I don't know these are "genuine replacements" or just odd xenon tubes, possibly with other specs.
Oh, I also came across the 580EX II service manual
! I've taken a quick peek and it actually includes the schematics in addition to all sorts of interesting info (including how to discharge the (possibly lethal) charged capacitors.