Re: Stuck switches on 453


If this is of any help, I had something similar on a 7B71, 7000 series time base plug-in.
The VAR didn’t want to move at all. It was completely stuck. I ended up de-soldering the pot and freeing it from the shaft extension a bit. It turns out it was pushed way too much into it and, as a result, wasn’t moving. That wasn’t easy, but now it’s completely free, and working as it should.

I don’t know how yours is mounted, but I hope this help...

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