Quote:
Originally Posted by ctc17
They run to hot and the wax leaks out then the moisture gets in and they arc??
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Humidity or the combination of heat/humidity is a failure mode for the RCA originals, but so is running with too much Horizontal Output tube current. A combination of both is probably the most common for those we saw - most of which failed in the summer, with the set running 16 hours a day as a babysitter for the kids. We'd get comments on the smell and the amount of smoke.
With our test jig (a old RCA metal cabinet 22" set), we'd pull the chassis, swap the fly, tubes, and give the HV cup a good cleaning. After an adjustment of the horizontal efficiency coil and a couple hours run time, it was back to the customer's house where we cleaned the CRT anode, adjusted the HV, and set focus and check the convergence. The repairs ran just over 150 bucks, with the bulk of the cost being tubes and the fly. Back then, it was flat $24.50 color labor, and no service call charge if the chassis was pulled. We'd do this several times a month. I hated it when Maganvox sets ate flybacks - no jig, so the heavy set got pulled, and I was the proverbial 98 pound weakling back then....
Cheers,