vertical lines in a Toshiba TV

[Username1]

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During post Vol 2 above you said -

They were all clean when I checked. I can see the flyback pulses, but nothing that looks like it would be happening during scan time.


Quote:

It's 178V. I can see the flyback pulses in it, but they are outside of scan time.

Nothing like the ripple or otherwise bars I see on the screen.

end Quote.

If there is a H pulse on it, then that's what is on the screen. That's why you have to
look up-freq. from the H-Pulse, Look for a harmonic as there are several light &
dark lines on the screen. If there is a harmonic it may occur during scan time.

Anyway if you see stuff on the 200V line, how are you sure it's not happening
during scan time? Anyway if it's happening on both sides of the screen then
it's also happening during the damper scan too. To me that points to H-Pulse
or harmonics on Power Supply lines.....

If there is for example 10 defined lines on the screen, then it's possible that
there is a noise source 10X 15, 734 on the screen....

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