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#1
06-11-2006, 05:22 PM
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Motorola VT-71/TS-4J
Have been working on this one for a few days now. Have a raster with picture but it also has bars across it. What do you think the cause is? I've replaced most of the caps and a lot of resistors.
Terry Last edited by 7"estatdef; 06-11-2006 at 05:46 PM. Reason: Add picture 
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#2
06-11-2006, 06:16 PM
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Did you put the high voltage cage back on?
Don
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#3
06-11-2006, 06:29 PM
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Yup it's on but I don't have the aluminum shield on the crt. I'll give that a try. You think it's rf interferance?
Terry
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#4
06-11-2006, 06:41 PM
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Quote:
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#5
06-11-2006, 07:10 PM
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Put the crt shield on but didn't make any difference. Did notice that the HV cage isn't at chaiss ground or B-. It's at RF ground though a 470k and .1 cap +100ohm resistor. All ok. Guess it's time to go play cards with my 9yr while I mull it over.
Terry
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#6
12-27-2007, 07:43 PM
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TS-4 problem solved (I think)
I think the problem was that the HV p/s cover was touching thee ground strap around the 7JP4. On these set that cover have it's own ground and it's not the same the crt and speaker. There is a piece of insulating paper under the HV cage were it mounts to the chaiss.
Those bars where making me crazy, I think this has got it. tnx for help! Terry
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