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Repair / Re: Tektronix DM501A repair
« Last post by CaptDon on Today at 12:34:13 am »One thing that ALL of the 500 series modules have in common is crappy switch contacts. Flush the switches with spray contact cleaner and then just a light wiff of spray contact lube. I will get flamed for this but I used WD-40 sparingly after using a spray cleaner on all of my 500 series module switches and they work fine!! I have inherited so many modules out of various dumpsters, most marked as "Will not calibrate" and I never had to do an electrical repair on any of them!!! Only had to clean the switches and excersize them about 20 times each.