(From: LEE (firstname.lastname@example.org).)
|NotTaR of Television Sets : More drastic measures to brighten CRT
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<< Picture tube brightener |
| Left portion of screen is.. >>
As a start, I crank the brightness control all of the way up. I then turn the
color control all of the way up. I let the set run with a bright screen for
around 15 min. This procedure cleans up the cathode surfaces so that they can
emit more electrons. Now turn the controls back to normal and see if any
improvement took place. If not, Wrap 2 or 3 turns of around 18 gauge insulated
wire around the flyback and add this extra power in series with existing
filament leads from flyback. You can experiment with the number of turns etc.
to get brighter filaments. do not run the filaments white - just a brightened
yellow. This will probably turn out to be around 8-9v in most cases. I had to
do this on two different Sanyo replacement flybacks as they had low filament
voltage from the factory. (flakey replacement parts). I`ve been running one of
these Sanyos for around 4 years now with a nice bright picture (13")