TV Philips G112 pincushion

[Freddy T]

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

 

[James]

"Freddy T" <still.workingOn@my.New.emailAddress> wrote in message
news:Xns943FD4A9D2C99stillworkingOn@203.87.95.150...

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

 

[Freddy T]

Freddy T <still.workingOn@my.New.emailAddress> wrote in
news:Xns943FD4A9D2C99stillworkingOn@203.87.95.150:

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

 

[Freddy T]

"James" <jamkat@SPAMLESScybanet.net.au> wrote in
news:3fc48945$1@usenet.per.paradox.net.au:

"Freddy T" <still.workingOn@my.New.emailAddress> wrote in message
news:Xns943FD4A9D2C99stillworkingOn@203.87.95.150...
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

Ohh there must be someone out there who has come across this before.
the following main parts in the e/w cctry measured okay 7963 7962 3956 2952
2962 2960 2950 5933 as well as a number of other resistors, diodes. EVen
the comps on the s-panel where checked.

Is there something else that could look like and e/w problem?


Thanks
Freddy T