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Old 01-17-2015, 02:22 PM
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timmy timmy is offline
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Join Date: Jan 2011
Location: Delaware ny
Posts: 3,709
Quote:
Originally Posted by Username1 View Post
Hi! Sorry this question is pretty frustrating.

Timmy, I have never seen a flyback from this tv, From the pictures Bill put up
I'm thinking it comes with the tube socket, and a few of the delicate wires off
the transformer are already attached to something so they don't break.....
If so, then you have easily identified tie points.... But since we all can't see
the tv at your place, we need to be sure all the connections are correct.

One way to check is to look at the resistance of each pin on the transformer
and make the assumption that as you add wire to the device, resistance will
increase. To check that you begin with your ohm meter at a known point, and
then work away from that point and see if you get what you expect...

If you look at this transformer, point A and point B are the closest points but
the winding is the largest, so putting your meter across A+B you will get a
starting resistance.

Write that down A+B= ?

Then take the ohm meter lead from point B and put it on point C This will
be a new total: It ill be A+B+C= Your meter will be on point A and C for this total.

Write that number down A+B+C=?

Now this is the tricky part, the bottom of the transformer is D But the largest
resistance reading looks like it should be between A and F. Now to me
I think Winding D and F are a separate winding.

It looks like both bottom coils are center tapped, so since the both coils lower
than the center tap should be very short, and parallel to point Resistance
between point D and E should be very small..

Write down resistance D to E =?

Also resistance between C and F should be almost twice the resistance of D to E

Write down resistance C to F =?

This is one way to find the bottom of the transformer. We're trying to confirm that point D
has been connected where it belongs.... I would be ok if you had the old transformer
and we could measure the points off it, without dis connecting these points
to make resistance readings...... But since you don't, you might want to
make these checks....

But before you go, I want you to know I am still concerned with the lack of HV on
the tube after you power down the set.... To that point Have you ever checked to
be sure that the correct heater windings go to the right tubes of the 4 tubes right
there..... It may be possible that something wired wrong there would be a bleed
off the HV when the set powers off..... And I have also been trying to still look for a
good reason why the 1 meg ohm resistor feeding the focus voltage burnt in half.....

Good luck with checking this stuff. You are very persistant with this set.....

.
the resistor that burned in half was the 100k across the f coil.
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