Bench Powersupply

Reading time ~1 minute

My first small restauration - a small paint job, 3D printing and a mechanical repair


List of defects

  1. Volt gauge won´t go lower than 2.5 Volt
  2. Old paint peeled off

Improvements

  • 3D printed dust covers

Lab_Powersupply_2 Lab_Powersupply_3


Disassembly
The modelnumber is blacked off, so my best guess for the build date is somewhere in the 80s. But i could be completly off. After taking of the top cover, one could really see its age - dirty but still impressive.

Lab_Powersupply_4 Lab_Powersupply_1


Repair
I tried to remove the gauges from the back, but after a quick glance it seemed that its way too much work.
So after some sweaty minutes of fiddeling with the front cover I had success and could remove the pointer assembly. Sadly I dont have any pictures of it. Turning on the powersupply shows that my repair worked. The analog pointer showed the exact reading as the digital one.

Lab_Powersupply_8


Painting
Second to last step was a fresh coat of paint, but first the old flaky had to be removed. I applied a thick coat of paint stripper and let it soak for a couple of hours. After the time had passed I could simply scratch of the old paint with a plastic scraper.
A quick sanding, degreasing and painting session later the powersupply looked 20 years younger.

Lab_Powersupply_3 Lab_Powersupply_7


Finishing
Now it was time to apply the 3D printed dust covers. Some small dabs of superglue did the trick. A quick assembly later and the powersupply looked like a new one.