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Sony KV-32FS320 - Weird problem

Discussion in 'Electronic Repair' started by [email protected], Jan 30, 2006.

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  1. Guest

    Hello,
    I have a Sony KV-32FS320 which is about 2yrs old now. Of late I have
    noticed a strange problem. Once in a while I will notice a flicker in
    the whole picture. Now this "flicker" is not exactly noticable at all,
    however I have noticed it a couple of times at different occassions. It
    sometimes happens when I'm watching a DVD or even just TV. So I'm
    thinking it might have to do with power. I have a basic power strip
    connected to it. But thats what I had my thoughts on. Any ideas? Any
    comments or suggestions would be appreciated. Thank you
     
  2. Ray L. Volts

    Ray L. Volts Guest

    If it's not an external (wall outlet or strip) supply problem, it's probably
    arcing.

    To check for arcing, turn the room lights off and the volume all the way
    down. Watch through the TV's vent holes. You should see a brief, blue,
    electrical discharge when the screen flickers. It'll also most likely be
    audible to persons with healthy ears.
     
  3. w_tom

    w_tom Guest

    If it is power, then it is in the walls or related to utility
    service. There is no power strip that is going to 'solve' that
    problem. However the list of suspects is long including antenna
    reception or cable TV interference, an internal TV problem, or problem
    unique to one station.

    A flicker does not tell us much. An intermittent blanking of the
    screen? Sudden appearance of snow? Loss of both picture and sound?
    The verticle flips once - veticle hold (internally) required
    adjustment. Failure of cable TV provider to properly earth cable to
    electrical earth ground before it enters the building is just another
    of a long list of possible problems. Or a wire in some wall receptacle
    that is loose because it was pushed in the back and not wrapped around
    the screw.

    The number of reasons for your problem are quite long. Power is only
    one possible answer. Meanwhile, a basic under $5 power strip with a
    circuit breaker or a direct connection to wall receptacle is a best
    source of cleanest power.
     
  4. Ray L. Volts

    Ray L. Volts Guest

    Since the OP said it occurs sometimes when watching a DVD, and assuming the
    DVD player isn't feeding the antenna input via RF modulator, we can rule out
    the tuner and station as suspects. It's less likely an antenna cable,
    either, for that matter.

    The cause could, of course, be as simple as cold solder joints acting up
    sporadically -- usually easily replicated by thumping, tapping, bumping or
    shaking the set (certainly the pcb directly).

    The OP might try connecting it directly to a different outlet to rule out
    the one in question -- if it happens on all outlets, it's almost certainly
    either the mains supply or the TV.

    As for cleaner power, a "basic under $5" model aint gonna cut it. There are
    much better alternatives which condition the line supply by filtering noise
    and clamping surge/spike transients.
     
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