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    Cjlennon623's Avatar
    Cjlennon623 Posts: 26, Reputation: 1
    New Member
    		  
    #1

    Feb 13, 2010, 12:08 PM
    Horizontal line television
    I have a 10 year old 27" CRT Sanyo TV and the picture has collapsed into a single, very bright, horizontal line. I was wondering if this was a failure in the horizontal oscillator circuit? I know circuit repair so I was trying to isolate the problem down to the area on the board. Also, there was a bad solder joint in the vertical area of the board and I used to wiggle the cable jack on the back to make the picture go full-size. Eventually, the wiggling stopped working so I opened up the set and that's when I saw the bad solder joint. I fixed it but the picture never came back. I have a feeling the arcing in the bad solder joint blew something out in the horizontal. Any suggestions (besides get a new tv)? Thanks for the time!
    WallyHelps's Avatar
    WallyHelps Posts: 1,018, Reputation: 136
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    #2

    Feb 13, 2010, 02:48 PM

    If you have a horizontal line your horizontal circuitry is working. What you should focus on is the vertical deflection circuitry. There's probably some transistors fried in there--especially since you mentioned the arcing connection.

    The electron beam is being deflected horizontally just fine, but not vertically.

    Good luck--and respect the very high voltages inside a TV!
    WallyH
    Cjlennon623's Avatar
    Cjlennon623 Posts: 26, Reputation: 1
    New Member
    		  
    #3

    Feb 14, 2010, 04:49 AM
    Quote Originally Posted by WallyHelps View Post
    If you have a horizontal line your horizontal circuitry is working. What you should focus on is the vertical deflection circuitry. There's probably some transistors fried in there--especially since you mentioned the arcing connection.

    The electron beam is being deflected horizontally just fine, but not vertically.

    Good luck--and respect the very high voltages inside a TV!
    WallyH
    Thank you for the info. Got it now.
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