The screw at the bottom of the MTX

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gunrock
Posts: 13
Joined: 28 Oct 2020 21:17

The screw at the bottom of the MTX

Post by gunrock »

There is a screw in the middle of my MTX on the underside of the case. It turns (without unscrewing - it seems) and can be pulled up and then it springs back into place.

Should it be able to do that (or should it be screwed in)? And what is it for?
Martin A
Posts: 470
Joined: 09 Nov 2013 21:03

Re: The screw at the bottom of the MTX

Post by Martin A »

That connects the botom of the case to the heatsink and the 5v regulator. It should be tightish, but not super tight as that will bend the motherboard.

See P23 of the service manual http://primrosebank.net/computers/mtx/m ... m#hardware
gunrock
Posts: 13
Joined: 28 Oct 2020 21:17

Re: The screw at the bottom of the MTX

Post by gunrock »

Thanks Martin. I'll investigate (hoping to strip it down for a good clean this weekend).
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thewiz
Posts: 130
Joined: 12 Aug 2012 16:08

Re: The screw at the bottom of the MTX

Post by thewiz »

It sounds like you have a screw loose :D
THIS is what Memotech is doing now.
gunrock
Posts: 13
Joined: 28 Oct 2020 21:17

Re: The screw at the bottom of the MTX

Post by gunrock »

@thewiz, oh yes, in more ways than one, I'm sure.

I've bought 30-something year old home micro without prior knowledge of whether it works or not and spent probably the same amount again on parts, that are coming from the four corners of Europe, to make a power-supply, for which I am definitely not qualified to do! :lol:

My wife thinks I'm mad and also a wild spend-thrift!
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1024MAK
Posts: 634
Joined: 24 Dec 2012 03:01
Location: Looking forward to summer, in Somerset, UK

Re: The screw at the bottom of the MTX

Post by 1024MAK »

Yes the screw (machine screw) should be tight. The idea is that the internal metal heatsink is held tightly against the metal case so that heat can flow from the metal heatsink to the case.

Mark
gunrock
Posts: 13
Joined: 28 Oct 2020 21:17

Re: The screw at the bottom of the MTX

Post by gunrock »

Ok, good to know.

I'll be taking a look at it soon, I'm hoping to weedle some time to strip it down and clean it up (now my key puller has arrived) this weekend.

Thanks,
Steve
gunrock
Posts: 13
Joined: 28 Oct 2020 21:17

Re: The screw at the bottom of the MTX

Post by gunrock »

Turns out the retaining nut was just loose.

Gave her a good clean. The keyboard sub-strata was utterly rank.
Kets must come off
Kets must come off
20201115_224716.jpg (93.9 KiB) Viewed 210 times
Give 'em a shake with warm, soapy water
Give 'em a shake with warm, soapy water
SmartSelect_20201115-224604_Gallery.gif (977.97 KiB) Viewed 210 times
Rinse and repeat
Rinse and repeat
SmartSelect_20201115-223942_Video Player.gif (8.03 MiB) Viewed 210 times
More work required to clean up the keyboard base and motherboard.
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