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Padgett
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Anyone know what would cause an 88-89 CRT to suddenly go to full width but only an inch high in the center ? Started doing about a month ago and looked like it tried to heal but no go.

Finally just had to put a spare in but would like to repair this one.

 

All I know is the CRT and Touchscream are separate and the CRT was made by Heath in Michigan.

 

ps 86-87 Riv CRT will function but has a different layout.

Edited by Padgett
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Ronnie

Old TVs with a CRT and vacuum tubes would do that a lot. My father-in-law (who has passed away) worked on TVs and could fix that problem. If I remember correctly he said the vertical amplifier circuit was bad causing the CRT to loose raster. Find an old TV technician and he will probably be able to fix it.

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Padgett

I am an old TV serviceman (once when on a recruiting trip for engineers. If an EE I asked if they knew how to fix a TV. Was told I shouldn't do that. Wonder if my Heathkit Ignition Analyzer has a similar circuit - have that schematic.

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