I have a Philips TV , it's a G112 chassis with rather curved looking
vertical lines at each end, pincushion . So I though it was the E/W
circuitry, you know the vertical modulated onto the horizontal stuff.
But it all checks out okay. Can anyone kindy offer any help?
I think the model number is a 29sp1798
Thanks for any help in advance
Frredy T
Um...If I recall correctly (been a while) check if there is a fuse open
near
the EHT tranny, and a shorted transistor TO-220 type package nearby
(no...I
dont mean the HOT, its to do with Pincushion)
I may be way off the beaten track here but something sticks in my mind
about
it.
Regards
James
Thanks for your advice James
There doesn't appear to be a fuse. That may be the G110 chassis. I checked
the TO-220 and it was okay as where all the components around it. The
components on the S-correction board where also okay. I have to admit he
pincushion is a bit odd. There is a full width screen but any vertical
lines at either edge bow inwards at the centre quite a bit. It's almost
like the neck magnets where not adjusted, of course they are and are glued
into position. I am started to suspect some other type of horizontal
defection linearity problems. I just not quite sure where to look, The
waveforms I checked all look okay.
I did disconnect the TO-220 and got a pincushion effect, similar to a
monitor when you adjust a monitor for pincushion. The horizontal
defelection actualy stops in a curved fashion. In my case I have a full
screen, it may actualy be extra width and the closer a vertical line is to
the outer edges the more it bows inwards.
Cheers
Freddy T
