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here I am,
today I had some time to work on this TV.
I found some differences in voltages at electrolytic caps
(anodes of the tubes).
This difference was because I substituted the the diodes (2 PY82) with one 1n4007 with a resistor 82 ohm in series. This was a mistake because the 82 ohm is the resistance of one tube but the PY82 are connected in parallel.
Now the vertical sync is more stable but the sound have some troubles yet.
ASAP I will post some images.
thank you for your help
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