Need service info on a B&K 470 CRT tester

[radiotvnut]

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"

[Findm-Keepm]

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,

[radiotvnut]

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.