Quote:
Originally Posted by bandersen
They used tined plastic - do NOT try to chemical treat it. I've worked on about 200 vintage TVs at this point and have never found a bad flyback so that's the last thing I'd consider.
Yes, they smell - it's the Tenite plastic Cleaning them exposes fresh material and it will smell worse for a while. I've had good luck with ScratchX and Novus #2 plastic polish.
As for the CRT looking pristine, that's great, but not that unusual because the plastic shell protects them from the environment.
If you're not hearing anything when you change channels, you have at least one other fault - maybe related to the lack of HV like something is off with the power supply.
I always recommend the easiest thing first. Grab an ohmmeter and go through the resistance chart published in Sams. No need for socket extenders or an isolation transformer.
Everytime I've made a wiring mistake, I found it very quickly with this method.
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Thanks for the information and the translation on the bumblebee capacitor! In my CRT evaluation, I was referring more to the heat damage I've seen on yokes after prolonged use. Just about every yoke on an almost dead CRT I've come across shows obvious signs of heat related degradation. Plastic warped and brittle...applied tape dried out and burned...wires with heat baked brittle insulation...discolored ceramic capacitors and resistors etc. Nothing of the sort on this one. Do damaged or dead 21EAP4s test as good sometimes? I really hope that's not the case with mine. It tested with good emissions and cutoff on my Sencore at 2.3V