possible problem with Sony flat-face WEGA
If they use DC on the filament, check for a bad electrolyytic
in its power supply. I used to add a filament transformer to
series string TV sets with a dropping diode to power an 84
volt string of filaments. They barely lasted a year from new,
without the modification.
Well, this set's over 10 years old. I'll pull out the service manual and
give it a look.
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