Phillips 3055 scope problem

Discussion in 'General Electronics Chat' started by redlght, Jan 26, 2014.

  1. redlght

    Thread Starter New Member

    Jan 26, 2014
    4
    0
    I have a Phillips 3055 scope was using a voltage divider circuit for looking at a transmitter's audio. Well the one i was testing i under estimated the power output 200 watts and it over powered the voltage divider and the scope and smoked the resistor in the divider and on the a channel of the scope it did not take it out completely but the scale is a bit off now. But the main problem is the screen it didn't have the halos around it before now it does i have to lower the intensity to get rid of it but would like to repair it. Any clues on what may have went? 2 photos of it one with intensity turned down and one were it normally was set at. It did not used to have be turned this low on intensity before this happened.Thanks
    [​IMG][​IMG]
     
  2. Dave_UYZ

    New Member

    Jan 16, 2014
    29
    0
    I think the brightness is too high, to judge by those pics.
     
  3. redlght

    Thread Starter New Member

    Jan 26, 2014
    4
    0
    I was told that a few times But it used to be set right where it is at and had no halo now it has to be turned down to get rid of it.
     
  4. Dr.killjoy

    Well-Known Member

    Apr 28, 2013
    1,190
    156
    Check out the black out circuit....Also there is no direct anwser because you screwed up so find the schematic and get cracking on check the parts for the failure or out of specs
     
  5. redlght

    Thread Starter New Member

    Jan 26, 2014
    4
    0
    Ok I will check the (blanking circuit) Thanks for the tip.
     
  6. redlght

    Thread Starter New Member

    Jan 26, 2014
    4
    0
    Problem solved
     
  7. BillB3857

    Senior Member

    Feb 28, 2009
    2,400
    348
    So what was the fix???????????
     
  8. RobeeJ

    New Member

    Mar 19, 2013
    24
    1
    I have a Philips PM 3082 with the same halo issue, I'd love to know too!
     
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