My first complete electronics troubleshooting and repair is my Power Designs TP340A bench power supply.
- Three independent isolated power sources
- Source A & B can do 0-32v at 1A. They can be operated independently, or as a bipolar tracking supply.
- Source C can do 0-15v at 2.5A, and 0-5v at 5A.
- I’ll add the stability and ripple specs once I’ve verified the performance of my supply.
It took me a while, but I finally got it to behave properly and I have been putting it to good use.
Blog posts on my refurbishment and repair
- Power Designs TP340A Repair/Refurb
- Power Designs TP340A PSU Troubleshooting & Repair
- Power Designs TP340A Continued and Concluded
- Power Designs TP340a Knob Upgrade
The unit was in great physical condition, but it did still benefit from a little cleaning up.
- “permanent marker” yielded to isopropyl alcohol and a melamine sponge.
- Tape/label residue was taken care of with some Goo Gone.
- I also use a combination of approaches to tidy up some of the blemishes on the front panel that I think were minor corrosion of the aluminum.
- Pink eraser
- Melamine sponge
- Rough end grain of a piece of bamboo worked with the grain of the brushed aluminum.
There are still some scratches on the aluminum and the plastic meter lenses. I may try and polish them out if I think I can do so without making things worse, but otherwise, I’m happy with it.
- Power Designs TP340a TP343b Operating and Service Manual.pdf There are a few versions of this floating around. This one is the best quality, but it could be better. The schematic is legible, but barely so.
- EEVBlog thread on my project.