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Sony & horizontal line

Discussion in 'Electronic Repair' started by Raffagr, Mar 16, 2005.

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  1. Raffagr

    Raffagr Guest

    Hi

    I have a KV-C292 Sony TV (chassis AE-1C) which is recently
    showing a lighter horizontal line in the middle of the screen.

    I’ve found R530 open.
    I’ve replaced the vertical IC (TDA8170) and all the components (excep
    the two transistor Q505 & Q506) around the vertical section, but th
    vertical doesn’t open.

    All the tensions are ok.

    Do you have any idea about it
     
  2. Mark

    Mark Guest

    I'm gonna guess the 2 transisistros are push pull vertical outputs. A
    line like that indicates crossover distortion of the vertical output.
    The 2 bases should be abpout 1.4 volts apart. Check the parts that set
    the voltage diffrence between the 2 bases of the vertical outputs.

    Mark
     
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