Tektronix P5200A "teardown"

[PwrElectronics]

I found a P5200A Tek Differential probe in the broken tools bin recently.

Decided to check it out.  Maybe a simple fix or at least some tear-down photos??

This thing was not easy to get into.  Its not designed to be taken apart or serviced.  The membrane switch overlay also hides the screws holding the clam shell together.  So, you will end up cutting the ends of the overlay to get at the screws.  I found this out after more carnage trying to cut the case apart.

Once "IN", here are some pictures of the board, etc.















A video of my troubleshooting of this. 

https://youtu.be/rYr7fdZKJQA

Turns out that someone applied reverse voltage to the power and blew/shorted a clamping diode across the power input.  I was able to get this working again with removing the destroyed diode.  But, the mechanical damage caused by me to get access to this would prevent it from being a viable repair in any corporate lab situation.