1 Nov
2022
1 Nov
'22
4:10 p.m.
On 24/10/2022 21:07, Antonio Carlini via cctalk wrote:
I thought those things that hold the fans on were a variation on pop rivets
but now that you mention it, I can see the "three sided slot" on the
outside. Perhaps there is something preventing them from unscrewing, so
that vibration from the fans will not end up loostening them or something
like that?
I've taken the boards out of a whole bunch of H7821 and H7822 PSUs to
replace the electrolytics without removing the fans. It was difficult at
first but the more I did, the easier it got. I did come across one seized
fan along the way but I haven't a replacement yet so I haven't got around
to removing the bad one. I should look into it.
Regards,
Peter Coghlan.
the bitsbox
one may be a teensy bit to large but the ebay one should
fit nicely. Neither is too expensive even with postage so I'll buy a
few, given that I do have a fair few PSUs knocking around.
Turns out both sets of X2 caps I bought were identical and they fit
perfectly.
As I was putting the PSU back together I thought I could hear something
loose rattling inside. So I decided to dismantle it completely.
I managed to get the bottom board out, with some fiddling, but it would
be much easier if I could get the fans off. However, they seem to be
held on with some fasteners that I've not seen before. On the inside
they are some sort of trilobe fastener that seems to yield under any
sort of pressure (so I stopped) and on the outside they have a small
hole with three thin slots, but my tri-wing bits only seem to turn them
in the "tighten" direction, almost as though the whole thing is supposed
to be "fit and forget". I suppose if I had to get the fans out of the
way I could destroy those fittings and replace with some suitable M
bolts. I'm just wondering now whether I'm missing a trick for removing
the fans?
As I write this I realise that a photo or two wouldn't go amiss, so I'll
try to take a few close ups tomorrow in daylight.
Antonio
--
Antonio Carlini
antonio(a)acarlini.com