"ian field" wrote in message
...

"John" wrote in message
...
I have a 5 years old RCA tv that required a new picture tube just
after de warranty had expired and the price for the installation of a
new tube was ridiculous. It was a good lemon but it was a lemon.
I would like to use the set as one more video source to drive an
external monitor ( it has pic on pic).
If I power the set without the picture tube and yoke load, will it
give nothing but sparks?
Then what do you suggest that I should disconnect in order to use it
as I mentioned.
I have the service manual some where and if I get some encouragement
from you, I will look for it.
Thanks in advance.
John

The line scan coils are part of the tuned resonant circuit so if you
remove them it will overload the PSU. Removing the CRT leaves you with a
free hanging EHT lead at 25kV and you can't remove the EHT transformer
because certain windings supply feedback for the sync separator.

Not to mention several other LT rails, which may or may not be used in the
signal stages, and probably a pulse that's used by the colour decoder. On
some FBT's, the EHT lead is removable. If that set is one of them, you may
be able to remove it and fill the plastic tube that's left behind, with
silicone rubber to stop the lightning flying out of it, but as Ian says, the
scan yoke is an integral part of the circuit, and would have to be left
connected.

Arfa