22 Sep
2011
22 Sep
'11
3:57 p.m.
There is a single socket for the fan connector, but the mains inlet can
be inserted into either the 120V or 240V socket. The fan has its own
transformer, so I presumed it was a mains powered fan.
Right. The schematic in the tech manual shows 2 connectors (120V and
240V) and a 2-winding thing where the windings are in series for 240V or
parallel for 120V. That's the nromal wiring for a msall mains transformer
primary, of course. I guess there's a little transforemr to run an AC fan
in there..Strange. You could prbably have kludged it ot run the origianl
fan on 240V without needing the rest of the PSU.
It must be nice to have the skills to diagnose and repair PSU faults,
Look, if I can do it, anyone can. Seriously. Remmember I've never been
taught any electronics in my life.
SMPSUs are a bit of a black art, it's true, but they do follow logical
principles and they can be repaired.
and maybe with a schematic (thanks for pointing that
out) and some help
I'll give it a go, but in the meantime I get to enjoy the GIGI without
wondering whether something is going to go bang...
Personally, I'd trust a quality PSU from DEC (or HP, or...) rather than
some modern thing from a PC peripheral.
-tony