Products > Test Equipment

HP 8566B Debug/Rebuild

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Kean:
OK, that is kind of what I expected.  But I'm sure they can be fixed.
Be careful as you disassemble further - unsurprisingly it can be easy to damage the parts.
I've still got a couple here in the pile of things to work on (for my HP 8657B).

MarshallPlexi:
I found this video and have already purchased some O rings from Amazon that will be delivered tomorrow. Assuming that the O rings are bad, would that cause the solenoid to fire only in the retract position? Or could the driver chips have failed as well?

MarshallPlexi:
Another good video for people like myself who are working through this.

Kean:

--- Quote from: MarshallPlexi on September 26, 2024, 06:33:17 pm ---I found this video and have already purchased some O rings from Amazon that will be delivered tomorrow. Assuming that the O rings are bad, would that cause the solenoid to fire only in the retract position? Or could the driver chips have failed as well?

--- End quote ---

Ah yes, I recall seeing one of his other videos on this topic



No idea if electronics are a common failure point on the newer models, but certainly possible.  The mechanical operation issues are quite a common issue with age.
From what I've seen other people reporting, yes they may stick in either state due to degraded o-rings.  My guess is that it might be due to a short actuation time not able to overcome extra friction.
Keep an eye out for any crap left behind clogging the holes or around the solenoid moving parts.


--- Quote from: MarshallPlexi on September 26, 2024, 09:27:24 pm ---Another good video for people like myself who are working through this.

--- End quote ---

Oh, an hour long... I'll have to watch that another time.  I assume from a quick scrub through the video he has an electronics fault?

MarshallPlexi:
Have you ever had one of those days where you fixed something and have no idea what you did that fixed it? That was my day.

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