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Sony 200ES Focus/Brightness Problem

Discussion in 'Electronic Repair' started by Simian Brain, Oct 18, 2004.

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  1. Simian Brain

    Simian Brain Guest

    Ok I am fairly experienced in TV repair (mostly older) but new to
    monitor repair. I am seeing a strange problem with my 200ES which is
    described below.

    - The screen warps in areas of darkness on a bright screen

    - Keeping the brightness low helps

    - When the brightness is low and the screen is mostly dark the picture
    is extremely fuzzy, as though there are two superimposed pictures, one
    not warped and one warped.

    - Pushing the brightness up removes that but the picture is still
    warped

    - Every so often there is an arcing in the monitor

    - At highest resolution the monitor makes a loud, high pitched noise

    I have the Sony service manual for this monitor, but not a lot of cash
    so I want to repair this rather than purchase a new monitor <g>. Any
    guidance that can be given is much appreciated.

    Thanks!
    TM
     
  2. Jerry G.

    Jerry G. Guest

    Check for high ESR caps in the power supply, scans, and secondary supply
    from the flyback output section.

    --

    Jerry G.
    ======

    Ok I am fairly experienced in TV repair (mostly older) but new to
    monitor repair. I am seeing a strange problem with my 200ES which is
    described below.

    - The screen warps in areas of darkness on a bright screen

    - Keeping the brightness low helps

    - When the brightness is low and the screen is mostly dark the picture
    is extremely fuzzy, as though there are two superimposed pictures, one
    not warped and one warped.

    - Pushing the brightness up removes that but the picture is still
    warped

    - Every so often there is an arcing in the monitor

    - At highest resolution the monitor makes a loud, high pitched noise

    I have the Sony service manual for this monitor, but not a lot of cash
    so I want to repair this rather than purchase a new monitor <g>. Any
    guidance that can be given is much appreciated.

    Thanks!
    TM
     
  3. Simian Brain

    Simian Brain Guest


    I think the last problem, the squeal, is separate somewhat from the
    rest. You think?
     
  4. James Sweet

    James Sweet Guest

    Possibly, really though the first thing you need to check is the arcing, get
    that taken care of and it might shed some light on the other problems.
    Squeel can be an arc loading down the flyback, bad capacitors could cause
    the HV to rise or lose regulation.
     
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