Electronics > Repair
most broken equipment you run into?
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Zenith:

--- Quote from: MadTux on December 09, 2023, 08:43:14 pm ---Miss the old days, where everything was sectioned onto plugin cards and you get a 500page service manual, with schematics.

--- End quote ---


It's the way the world has changed.  In the days of valves (toobz) repairing TVs was a considerable industry. These days TVs last for years and when they fail, I doubt they can be repaired. I was talking to the people at the local dump about the TVs and monitors they take. They said they almost all work. Most people get rid of them because they are too old.

antenna:
5kΩ pots
Wallace Gasiewicz:
I believe Coppercone is correct, its either PS or Scopes. but these are the most common equipment anyway.I used to pick up scopes and PS at hamfests and fix them, If i got a nice one I would keep it, otherwise sell for my TE fund. 

But now, with the advent of new DSOs being so nice and cheap, it does not pay to refurbish old scopes.  In my part of the country at least, some really nice old tek scopes are going for less than $100.  Would have purchased them just a few years ago. 
On the broken old scopes, it was usually something like a burned input FET and a quick fix. You could pick up a quick couple hundred bucks this way. Not so with the new DSOs. 
The PS are becoming more and more switching, so they are harder to repair, probably not worth it.   I still try to pick up Big Linear PS when I can.  Lots of radio operators are always looking for them. Pretty easy to fix if the transformer is not burned. Does not seem to be much of a market for Lab PS though. 
I picked a uninterruptible NEG 48 volt PS off the ground at a hamfest after the vendor left it. I fixed the thing and now both PS work.  If anyone wants to pick it up for cheap, I am in Indianapolis. This is a telephone company PS.
coppercone2:
but what I am saying is that I see DSO failing that are not used much and new ! like tektronix etc. anything from front panel buttons to channels going off. that stuff has repair tag on it ALOT
floobydust:
#1 busted test equipment I see at work is bench power supplies. I went through over 6 repairing them and adding protection diodes if they were missing.
No engineering budget dollars to buy new ones, so I simply fixed them while jr. engineers were bamboozled I would take them apart and knew what I was doing in there.

For other tagged test equipment, it can be people not knowing how to use it and thinking the scope is defective when it's not showing what they want or expect.
I was doing probe comp and again the jr. engineers were fascinated what I was doing turning a trimcap in the probe so square waves looked proper.
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