I just obtained a B&K CRT tester from a guy that couldn't remember if it worked or not. At first, I couldn't get any meter deflection. I sprayed the switches and pots with cleaner and it seems to test CRT's OK now; but, goes dead when I flip the selector to "clean & balance" or "rejuvenate"

My Dad has three of these - I seem to recall when you go to either rejuvenate or C/B, the meter still reads the emission. When you press the button, the meter reading drops, except when the CRT neck starts arcing - then it "dances" around.

The 480 seems close if I recall - a PDF of it's service manual is attached. I'll see if Dad has a copy of the manual I can get for you - by the way, it's a 5X8" and has a green cover - I left it in a customers house once and had to backtrack a day later to get it. The customer was worried the most about it!

Cheers,

Thanks for the information. The pilot light does not even glow in the rejuvenate or clean and balance position. Looking at the schematic, it's probably either a bad selector switch or a bad power transformer. I'll check that out ASAP.