I imagine Martin is the chap to ask here! There are not that many who are able to satisfactorily repair these complex machines!

Thanks for that Peter, perhaps Martin will comment if he has seen the posting.

I've seen this cracked plastic head problem many times and so far, I have managed to replace with good switches from donor units but inventory is near depletion.
I would imagine it possible to take out the damaged switch and cast a new plastic head in epoxy (araldite) onto the metal and file it to shape.
Worth trying, I suppose.

Isn't there a tiny spring (plate) missing from one of the switches too ?
I'm sure, it is to be found down the bottom somewhere.

Martin

Thank you Martin. The more I look into the remains of this turntable the more broken bits I find. Perhaps there are still more to find :-)

I will certainly try to remove the broken switch and rebuild it....... what would we do without Araldite!?

I'll let you know how I get on!

Thanks again

NigelGee wrote:

I will certainly try to remove the broken switch and rebuild it....... what would we do without Araldite!?

I'll let you know how I get on!

I would go for new switches, there is a million diff. types out there.

Oh yes, something in the 33-36 row could be useful, depending on size etc.

Martin

Dillen wrote:

Oh yes, something in the 33-36 row could be useful, depending on size etc.

Martin

Its difficult to see the size on the pic, but 11,13, are very small and would fit in without problem, mostly these switches are guarantied to last more millions work cycles, they are closed and in a TT they will last forever. The actuation arms are easily bent to fit, normally fastened with 2 M3 screws with nut and washer, so 2, 3.5 Mm. holes in the PCB will do it.

Thanks Martin and Soren for the suggestion. I think I have already looked at 1 million microswitches on the WWW and there are a few that might fit but the problem could be the alignment...... anyway thanks again....... I nearly bought another one off Ebay tonight.......my interest is turning into a fetish...lol.

Have a good weekend!

Cheers

Hi Folks, just a quick update on this project. Completely by chance I found a solution on EBay where a seller was disposing of PCB from a Beogram 3000, complete with it's power supply, and I couldn't believe my eyes when I spotted three micro contacts of the same type as those that imploded on the 4002.... so all is not lost (hopefully). I have another project on a Beogram 3000, about which more elsewhere! (I'm in trouble again!)