Tektronix 465B: Repair

00:00 Channel 1 checks
01:54 Channel 2 issue
04:00 Channel 2 x10 indicator
05:00 A look inside
06:28 Repair
09:43 Test

Channel 2 of this Tektronix 465B oscilloscope had an issue that was traced back to a faulty diode in the vertical switching logic. As a temporary fix I used a BAT 41 diode to see whether there are other issues with the scope. Everything looked good. I looked for a proper replacement for the soon-to-be unobtainium faulty HP diode and found the 1N5711.

Not shown in the video: I powered the scope up and... Nothing. Did I blow it up? As it turned out a cable soldered to the line switch got loose. Quick fix - now it's up and running.