HP432A Power Meter Doesn't Zero - Repair Part1

In this video, I'm looking at a broken HP 432A Power Meter (it can't zero) to see where the fault may lay - Hopefully, it'll be an easy fix in Part 2.

[@PixelSchnitzel]

I like the beverage of choice segment. It doesn't matter what the beverage is. It's fun to follow along with your diagnostics. Looking forward to the next episode . . .

[@tgsoapbox]

Thanks - I'm going to swap the board into a working 432A I have to confirm that it isn't a component on the board before I go all medieval on the Coarse Zero pot.

[@zdzisiek1979]

👍

[@tgsoapbox]

Thanks - Glad you enjoyed it.

[@user-fy7gx9os5c]

Hi! My A1 A1 unit burned down. Please tell me, should I buy it?

[@tgsoapbox]

I would be happy to try and help but I don't really understand the question - Are you saying that your A1A1 Auto-Zero assembly burnt out and you are wondering if you should buy a replacement?
You could probably repair it but I think these were a "factory" calibrated unit as, while the schematic has parts on it, the replaceable parts list only has it as a full assembly.
I think you might be better off trying to find a cheap 432A without sensor and give just swapping out the A1A1 into your original unit.