I have a 1997 25" Zenith TV. Model # Z25X22S. When I choose the TV/Video button to view DVD's, the picture shows as black and white with horizontal scrolling lines. What could be the issue here? I also have a convertor box on this TV. Thanks in advance for any suggestions.
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Check the green output section circuit at the video output card for any loose soldering. This card can be located at the neck of the picture tube itself, will directly plugged to it. You can pull it out of it for repair. Re-solder all the suspected solder terminals there. If
you are not familiar with electronics, do not attempt to repair! Whether you sufferfatal electrical shock!
Instead, contact the nearest service center!
You DO NOT use "Channels" to View a DVD player it usually connected to the AV External input. via AV, Yellow, (Video) Red & White, (Audio) or Component Video, Blue, Red & Green. (Video) + Red & White (Audio). These are selected via the External Inputs.
how is the 200 volt supply to the video output transistors??
measure the collector voltage of the video output transistors with the crt board on and off the crt. if voltage goes up when crt board is off then crt shorted
On the inside of the TV, there will be a knob with a RED cap on it, labeled vertial position. (it actually looks like a variable inductor)
With an allen wrench (possible 1/4) give it a half turn in either direction and see what happens. On the Z25x22S model, the vertical and horizontal position adjustments should be right next to eachother, but on the model i worked on, there was no variable pot for the horizontal position.
as you say that it is old tv so there is a possibility that there may not be audio video socket where dcd player can be connected.
You will have to purchase one video RF converter.RF converter contains one video input in yellow color & two audio input in red & white colour & one cable connector as output.
Connect the dvd output to this converter & tune tv program in which place you receive dvd signal.