I set up to print the other day only to find my Kaiser 6002 (colour head) had blown a fuse in the PSU. The PSU is the K4451 stabilised version. Replacement fuses arrived today (the correct T1.25A slow-blow) but it continues to blow the fuse whenever I switch on (yes, with the head connected ) I've investigated what I can: rewired the mains plug, replaced the bulb, had the lid off the PSU to look for any obvious shorts, but to no avail. I have no electrical test equipment, by the way. Can't check the wiring within the head properly without dismantling the whole thing, which I'm loath to do lest I bugger up the colour filters. Though as I only use it for b&w VC printing that might not be the end of the world. I think Fotospeed are the Kaiser Distributor for the UK so I'll drop them a line, but any further suggestions before I consign it to the spare room and give up printing until I can afford to have it looked at?