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Green picture from scart

Discussion in 'Troubleshooting and Repair' started by BKelectronic, Apr 6, 2018.

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  1. BKelectronic

    BKelectronic

    4
    0
    Apr 6, 2018
    Hi!
    I have a problem that I´ve never seen before!
    I have a got an VCR/DVD burner thats show a green picture on some screen
    It´s an Grundig GDR6460 (I think it´s performed by DAEWOO?)
    On the owners screen and one of my LCD screen the picture is green. Even in setup mode
    When I connect the unit to another LCD screen it is fully correct (LG screen). I have also connected it to an older TV and it is working fine. i have also trid to changed the scart cable!
    The output on the unit is set to RGB
    Have anyone seen this problembefore?
     
  2. ramussons

    ramussons

    396
    75
    Jun 10, 2014
    If the output is set to RGB, where does the SCART come in?
     
  3. BKelectronic

    BKelectronic

    4
    0
    Apr 6, 2018
    Yes I have checked this possiblity too!
    And they are also set to RGB and have no trouble with other units!
     
  4. ramussons

    ramussons

    396
    75
    Jun 10, 2014
    If the problem is only with a particular display, the problem is there. Check the SCART connections (though unlikely), pins 7 and 15, the Blue and Red signals. The problem could be the Red and Blue signal amplifiers.
     
  5. BKelectronic

    BKelectronic

    4
    0
    Apr 6, 2018
    Yes! I also get this thougt at the first time.
    I will check and compare the red and blue signal on scart again
    The most strange is that it appears on two separate screen. If I connect another unit (VCR,DVD or similar) there is no problem at all. The screen are fully correct with corect colour (on all screen)
     
  6. ramussons

    ramussons

    396
    75
    Jun 10, 2014
    The SCART connection handles both RGB and Composite video;
    Pins:
    7 Blue, 11 Green, 15 Red
    19 Composite OUT (video source), 20 Composite IN (Monitor).
    16 RGB or Composite select (decided by the video source)

    What is (are) your Monitor(s) selecting? RGB or Composite?

    Let's say that for the VCR or DVD composite is being selected by the monitor. Its fine.
    But for the Grundig, its choosing RGB and there is a problem.
    or the other way round.

    Check the pin 16 voltage (Binary) in your various connections and that will give a much clearer idea to the problem.
     
  7. ramussons

    ramussons

    396
    75
    Jun 10, 2014
    Additionally, do all the monitors have a RGB option? Maybe the working ones choose Composite irrespective of the Pin 16 status.
     
  8. BKelectronic

    BKelectronic

    4
    0
    Apr 6, 2018
    Thanks for your help!
    When I disconnect pin 16 it's working absolute correct!
    Next thing to discover is to see if the problem depend on VCR or TV.
    Time to work on
     
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