Dear Valentin,
Thankx
a lot, for You effort! IT was succesfull!
So sucessfull that the even the chassis
number was the same, with some very little
difference on only few components. All
numbering was the very same, and the repair
was very, very, easy, less than 2 hours,
including Tv cleanning, isolating HV, and
reassembling.I don't know if you are interested, but the fault
on this set was caused by several HV spikes
on the CRT plug. After that, the image goes
dark (no image seen on screen), and sound
ok. Adjusting the Screen potentiometer on
HVT a little the image appear but very dark. The
fault was a short on C604, 47nf 100v, just above
the HVT on schematic, it shorts the ground to what they
called AQUA signal. This caused a low level
signal sent to pin 22 of TDA8843 and Screen
light simply gone. Replaced by 47nf but
400volt part, not 100v. Some isolating grease
was used at CRT HV plug, to avoid HV spikes.
Best Regards Albano
albano.matos@netvisao.pt