Date: Mon, 11 Sep 2000 08:39:25 GMT
From: "neil barnes" <[EMAIL PROTECTED]>
Subject: CT50 power supply units

I had occasion last night to take a power supply to bits - the 15 cord had 
been cut by a previous owner and I didn't want to fix it in the cable 
itself.

Trust me on this one: Tosh didn't want anyone but their guys to play with 
it...

*warning* high voltages can exist within the unit *after* the mains has been 
removed...let it stand for a few minutes at least before playing!

The outer shell has four clips, two on each of the long side, which can be 
prised apart with a thin screwdriver, then the case comes off in two halves.

The main unit is shrouded in a thick copper foil which is soldered to the 
circuit board in two places. It's also soldered shut where it wraps round on 
itself. You'll need a big soldering iron to get it opened safely (i.e. 
without melting anything on the other side) as it makes a bloody good heat 
sink! When you think you've got the solder off it should spring open a 
bit...but it's still fastened to the next layer in, a plastic insulating 
wrap, with double sided sticky. You don't need to separate this as it turns 
out that once the copper sheet is free, everything will slide out of the 
inner plastic bit with a bit of shaking.

Rebuilding is - in the words of the Haynes manuals - a reversal of the above 
procedure. Use something to keep pressure on the edge of the copper when you 
resolder it and make sure you fasten it *exactly* where it came off the 
circuit board.

Hopefully you'll never need to do this, but at least now it's in the 
archives!

Neil
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