EEVblog Electronics Community Forum
Electronics => Repair => Topic started by: THM60 on November 17, 2022, 03:14:48 pm
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Hi,
I am restoring a Tek 2230 scope that endured a numbskull's attack who tried to repair it. His brain dead approach to "servicing" the blown PSU ended in sawing the chassis to gain access to it :palm: . Best part is that he decided to secure the chopped aluminium bit with hot melt glue :wtf:
Of course, not understanding what he was doing, he abandonned the project midway and didn't care to reassemble the chassis, throwing away some parts. And replaced the blown 2A fuse with a 5A one. For some mysterious reason, he didn't use aluminium foil or paper clip instead of fuse.
So, I'm looking essentially for :
- two plastic hinges for the upper board. Tektronix part number : 214-3327-01 (see drawing)
- a pinch of screws that were lost in the battle or thrown in the bin: machine screw 4-40 x 0.25, flanged head. Here in Europe we have almost zero access to such imperial threaded screws...
For entertainment purposes you can have a look at the carnage here : https://photos.app.goo.gl/8B4YyACh2ZtfrG8d9
Thanks for your kind attention.
[attach=1][attach=2]
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Hi
If you do an eBay search for 4-40 UNC screws you will find the screws you are looking for. I don’t understand the flanged head part, do you mean Counter Sunk or Flat Head, if it is Flat Head ones you require I have a large number of stainless steel ones you can have some of for the cost of postage. You also will need to give the length of the screws you require.
G Edmonds
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Hi
If you do an eBay search for 4-40 UNC screws you will find the screws you are looking for. I don’t understand the flanged head part, do you mean Counter Sunk or Flat Head, if it is Flat Head ones you require I have a large number of stainless steel ones you can have some of for the cost of postage. You also will need to give the length of the screws you require.
G Edmonds
Thank you for the tip, very kind of you for offering flat head screws. Sorry for wrong description, I had Counter Sunk in mind. I don't have an eBay account anymore (may sound weird but for personal reasons I decided to boycott eBay).
Best regards,
Thierry
EDIT : found what I need on Amazon https://www.amazon.com/gp/product/B08RF2TC86/ (https://www.amazon.com/gp/product/B08RF2TC86/) and https://www.amazon.com/gp/product/B08RF1258V/ (https://www.amazon.com/gp/product/B08RF1258V/)
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Let me guess you bought this from "Pablo"...?
I asked him if he would send the scope:
"OK can do."
Asked if it was complete although not working:
"Yes but for parts only... Internal access is very hard."
He then kept insisting on the fact that it was for parts. When I realised he didn't really want to send it I asked for his justification in saying it wasn't repairable.The prick never bothered replying.
I'm glad he gave up on me after all.
Good luck with the restoration.
Edit: I doubt I have screws, I may have a spare PSU shielding plate around if needed, won't be free though I need cash.
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Let me guess you bought this from "Pablo"...?
Ah ah ah spot on :-DD
As I live about 30 minutes drive from the old fart I went to pick the poor thing, it was quite cheap anyway.
Shocked by the massacre I discovered later on in the poor Tek I sent "Pablo" a message containing words like dumbass, moron, numbskull, goofy etc. to qualify the author of such inept "repair" attempt. He didn't reply, and thanks to your post I now understand why :) (he he pretended that "someone" had already tried to assess the problem). Anyway What kind of moron would assume a piece of equipment must have been welded together to keep you from getting at a circuit board rather than simply being more clever than the repairman is ?
Grumble mode over, back to restoration : so far I replaced Q9070, CR908, R909, Q908. Today I think I found what made the fuse blow : CR901 is shorted. I keep my fingers crossed hoping that nothing was damaged downstream. Working in this 2230 PSU takes obstetrician skills :o