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thanks!
installing the 82k resistor on place of r27 brought the linearity to a very watchable level with very minor distortion
i will keep it like this and use it until i find the exact schematic
i have it running right now as i write
i spent some hours watching it today letting it run for half hour runs and checking the temperature of the flyback etc and i ran into a weird problem that i fixed by accident:
when dead cold, the tv would turn on and high voltage would kick in very fast, the raster would come on along with the sound etc.. but the horizontal would take about one minute to lock...before that you could play with the hold control and bring in a very faint picture with lack of contrast indication of low AGC or a weak tube in the IF...but after a minute or so the perfect picture would just pop in with good lock and good contrast...i repeated the test several times with different modulators both on UHF and VHF etc and the result was always the same...it took too long to get a good strong picture and as a consequence the picture would not sync, after a minute it would just pop in...
i was about to remove the IF tubes to test them when i remembered i was using the old gassy horizontal output that came with the tv...i installed it but was not expecting any improvement of course....installing the new one cured the problem...how weird is that??? now i turn it on and it takes 10 seconds to lock by itself after the raster appears...
the only thing i want to tweak before putting on the back cover is the slight buzz when subtitles or text appears on screen...since i watch a lot of movies and they are all in English i like the subtitles turned on and that bothers me a little..i dont have any buzz on my other sets.. i dont have the equipment to do an alignment , so is there a coil around the audio detector that i can tweak sligtly to try and remove some of the buzz? i dont want to play with all of them...
detuning the fine tuning gets rid of the buzz but i loose definition of the picture..on my German sets i fix that by lowering the AGC just a bit but this set doesnt have an agc adjustment
cheers to all
Last edited by Hugo barbedo; 04-01-2019 at 07:26 PM.
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