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    long1's Avatar
    long1 Posts: 1, Reputation: 1
    New Member
    		  
    #1

    Aug 21, 2009, 09:24 PM
    Red and blue guns will not focus
    I have a Phillips 55pp93 5217. The picture seemed unusally bright and I couldn't get a true black picture. As I was adjusting the guns, I noticed the blue and green would not focus. Any ideas?
    KISS's Avatar
    KISS Posts: 12,510, Reputation: 839
    Uber Member
    		  
    #2

    Aug 21, 2009, 10:12 PM

    The screens in the tube or a bad tube. One unusually bright one, suggests to me a bad picture tube.

    It''s been a long time since I did convergence adjustments on a TV.
    DanielF's Avatar
    DanielF Posts: 158, Reputation: 14
    Junior Member
    		  
    #3

    Aug 23, 2009, 12:33 AM

    How old is the set? Did the problem appear suddenly or gradually (over what period)?

    Power supply faults can also cause similar behaviour, giving incorrect tube electrode voltages.

    Daniel
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