Pincushion Picture My TV set had suddenly started to project a "pincushion" (concave sides) picture. The TV laboratory claims that the Flyback transformer and other parts should be replaced. My impression is that the lab estimation is exaggerated since, as far as I understand, when the Flyback fails, there is no HV supply to the CRT and there should be no picture at all. Please advise.

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337 Answers

Lets try something before you call for a second opinion,with the tv ON and the problem showing hit the top and side of the tv,if the picture somehow reacts or corrects itself when you hit it call someone else and tell them what the problem is and that you feel it has a loose conection,dont have to tell them about the first estimate. Dont hit the tv with a hammer,just with the palm of your hand.Is worth the try. Good luck.

Posted on Sep 18, 2006

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This is not a picture tube problem. This could be what is called pincushion distortion. It is caused when the is a malfunction in the deflection coils and the inability to correct for the curvatures caused by the CRT. The pincushion distortion can also be caused by the degradation of the functionality of the convergence amplifiers in the TV set. I would suggest that you have a TV technician examine the deflection circuitry and the pincushion circuit, this would also include the convergence amplifiers.

I hope this helps,

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Shuttle83

http://www.electron-age-technologies-llc.com

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