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SONY BVM 2015 Broadcast Video Monitor

Discussion in 'Electronic Repair' started by Ziggie, Dec 4, 2004.

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  1. Ziggie

    Ziggie Guest

    Hello,
    I have this Sony BVM 2015 monitor with no high voltage.
    Preliminary checks done did not reveal anything obvious, HOT is OK, flyback
    rings good etc.
    Does anyone have any experience on this one and could give me some
    suggestions.

    Ziggie
     
  2. Jerry G.

    Jerry G. Guest

    I have not worked on that particular model, but others that are a bit
    similar.

    Are your sure that the power supply is working properly at all its outputs?
    Did you check to see that the scan gen is working? Is there 100 ms of
    kick-start pulses coming to the horiz output transistor base when the power
    is first turned on? Did you do an ESR test on all the caps in the horiz
    output section, and power supply?

    If the CRT has a defect where it is pulling too much current, or the HV
    multiplier is not working correctly, or the HV sense is out of the normal
    window of operating current, or if there is a condition where there may be
    some X-Ray emission, the protection will come on, thus not allowing a full
    start-up. In these cases, there should be a kick-start for about 100 ms,
    then the shut down will occur. This does not rule out any number of
    combinations of failures.

    It is possible that the flyback is defective. The output trans and flyback
    should be changed together at the same time to verify. I have had a
    defective flyback also cause what you have.

    --

    Jerry G.
    ======


    Hello,
    I have this Sony BVM 2015 monitor with no high voltage.
    Preliminary checks done did not reveal anything obvious, HOT is OK, flyback
    rings good etc.
    Does anyone have any experience on this one and could give me some
    suggestions.

    Ziggie
     
  3. Ziggie

    Ziggie Guest

    Thanks Jerry

    Will start working on it soon

    Ziggie
     
  4. Concerning the power supply. Keep care of fuses which don't look like
    ordinary fuses. I had this with several PVM-1444
     
  5. SONY BVM 2015 Broadcast Video Monitor
    Normaly, you have to change at first the electrolyticcapacitors at the
    powersupply, the highvoltage-, the vertical- and the horicontalboards.
    The BVM-2015 is over 10 years old the electrolyticcapacitors are
    leakage.
     
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