Question about Zenith B25A11Z 25" TV

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VIDEO TAPE WHEN PLAYED WAVE AT THE TOP OF THE TV SCREEN

I have a NEC 68cm TV when i play VHS videos but it only happens on some videos which is strange is it because some videos are recorded in a higher frequency.

What happens is the top of the picture waves hard to explain if it was a tree it would bend to the right the horizontal hold does not seen to fix it its like a horizontal problem.

Wayne.

Can you adjust the horizontal pot on the curcuit board

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This is a common problem usually seen when playing copy protected tapes. The part of the picture affected is normally off the top of the screen. Sometimes the problem is also due to the VCR itself and differences in tapes. It's also possible for the TV itself to be causing this, although you would probably also notice this flag-waving (that's what it's called) on regular TV viewing if that were true.

Sometimes increasing the height of the picture can push the affected area off the top again. But this can also cause you to lose part of the picture you want. Also, the height adjustment may be difficult to find as it's not something normally used. On some TV's it's a small pot somewhere on the board, but most newer sets have electronic adjustments through a service menu that you need to know how to access.

I'd suggest trying another VCR first and play one of the tapes you know shows the trouble. That might be all it takes. Then consider trying to increase the picture height if it's just a small bit at the top of the screen.

Posted on Mar 12, 2009

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