HP432 Repair Part 4 - The potentiometer isn't the problem

I decided to remove the old potentiometer while I was waiting for the new one to be delivered today - It appears I jumped the gun on the guilty part...

[@DrFrank-xj9bc]

Best regards from La Palma, Spanish Canary Island.
My beer tonight is San Miguel, after a hot day here, up to 303K air temp, and volcanic heat from below.. we just drove across the recent lava stream from Cumbre Vieja.. very impressing.

[@tgsoapbox]

Nice - Happy to hear you're having a good break - Always wanted to visit the Canary Islands (and the Azores & Galapagos if we're listing islands I want to visit) - We will get there someday.
I looked at the schematic for the 432 and there are a number of RC paths back to GND which I think is what is making the potentiometer read strangely - I'm going to put the unit back together and swap the cards to work out which one is problematic and then start diagnostics on that - Thanks for your suggestions., appreciate them.

[@CraigPetersen12f36b]

Been thinking of getting one of these meters myself primarily as a curiosity, nice to have some reference material for potential faults. Keep them coming!

[@tgsoapbox]

Thanks - They're good units, especially for calibrating the ref outs on the 43X etc power meters. They seem to be plentiful right now so it might be a buyers market.
I have the next part that was supposed to post today but Premiere Pro crashed and ate my project so I have to start again :(

[@zdzisiek1979]

👍👍🙂🙂

[@douro20]

The original Spectrol pot is insanely expensive- but there are some people who will ONLY trust the original Spectrol.

[@tgsoapbox]

Now I'm afraid to look... The replacement I bought was a Bourns unit but this one actually seems fine - I hope the issue is on Board A2 but I need to swap it into a working meter to see - I would prefer it to be on the board and not in the wiring harness or switches of the chassis.

[@douro20]

@@tgsoapbox The Bourns ones often have better specs anyway.