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Tech: monitor missing green

Discussion in 'Electronic Repair' started by jhuie, May 8, 2006.

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  1. jhuie

    jhuie Guest

    I have an arcade game and haven't been able to locate a schematic for
    the monitor. It's a Hantarex 25" Polo monitor. Anyway, the green is
    completely missing. There is a red and blue knob to adjust the colors
    but no green one. Someone told me that the green is controlled by a
    resistor and I'm supposed to adjust the red and blue to match that.

    If that's the case, then is it likely that the resistor could have
    failed to produce this problem? If so, how would I locate that sucker
    without a schematic? Or is it more likely to be something else? Bad
    tube? Etc.?

    Sumbuddy peas hep me!
     
  2. 3T39

    3T39 Guest

    Hello, jhuie!
    You wrote on 8 May 2006 11:33:03 -0700:

    j> I have an arcade game and haven't been able to locate a schematic for
    j> the monitor. It's a Hantarex 25" Polo monitor. Anyway, the green is
    j> completely missing. There is a red and blue knob to adjust the
    j> colors
    j> but no green one. Someone told me that the green is controlled by a
    j> resistor and I'm supposed to adjust the red and blue to match that.

    j> If that's the case, then is it likely that the resistor could have
    j> failed to produce this problem? If so, how would I locate that
    j> sucker
    j> without a schematic? Or is it more likely to be something else? Bad
    j> tube? Etc.?

    j> Sumbuddy peas hep me!
    j>




    First, Switch off and pull out the plug. Check the small panel on the end of
    the CRT (may have to remove screening) for cracked solder joint (use
    magnifying lens), If no luck, with the set still off, try swapping the red
    and green wires on this panel and see if you get green when you switch on
    now. If you see green after swapping wires then the tube is OK but green
    video output device is not working, (Probably output failure, but could be
    signal lost somewhere). If still no green then probably bad tube.

    With best regards, 3T39. E-mail:
     
  3. jhuie

    jhuie Guest

    Thank you. I found the problem. It had a bad connection on the input
    signal wire. Fixed it and it looks beautiful. Thanks for your help.
     
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