Results 1 to 7 of 7

Thread: Horizontal Green lines

  1. #1
    Kuroko's Training Dummy
    ovalfastlx's Avatar
    Join Date
    Jul 2017
    Location
    Redwood City, California

    Posts
    76

    Horizontal Green lines

    Just got a 4 slot big red, hasonitor issues. I'm getting horizontal Green lines going across the monitor, gameplay looks washed out too. Added some pics.

    Sent from my SM-G965U using Tapatalk

  2. #2
    Raiden's Valet
    pulstar's Avatar
    Join Date
    Jun 2011
    Location
    Southampton, England

    Posts
    582
    They're flyback lines. It could be a fault with the chassis or the screen brightness could be turned up too high. Try turning down the screen pot on the flyback/LOPT first and then go from there.
    My favourite pigeon had a fatal run-in with a cloud...

  3. #3
    Kuroko's Training Dummy
    ovalfastlx's Avatar
    Join Date
    Jul 2017
    Location
    Redwood City, California

    Posts
    76
    Quote Originally Posted by pulstar View Post
    They're flyback lines. It could be a fault with the chassis or the screen brightness could be turned up too high. Try turning down the screen pot on the flyback/LOPT first and then go from there.
    Sure enough, adjusting the flyback got rid of the lines. Thanks.

    Colors look washed out still.

    Sent from my SM-G965U using Tapatalk

  4. #4
    Kuroko's Training Dummy
    ovalfastlx's Avatar
    Join Date
    Jul 2017
    Location
    Redwood City, California

    Posts
    76
    I quickly checked the chassis board. Found a cap that has old glue or is leaking?

    Sent from my SM-G965U using Tapatalk

  5. #5
    NEST Puppet
    Hine62's Avatar
    Join Date
    Jul 2005
    Location
    New York

    Posts
    185
    This will get you started:
    How_to_Correctly_Set_Up_Monitor_Colours_and_Bright ness

    You may have to adjust the RGB drives/cutoffs to get more color. I found it is easier just to start from scratch. There is lots of voltage back there so be careful...

    It does look like there are caps leaking. I recapped mine and all the color problems are gone. If you have basic soldering skills you could did it also. Do you now what chassis you have? There should be a name on it some where on the top of the board.

    Also take a pic of the cross hatch screen, so I can see if you have any other problems.

  6. #6
    Kuroko's Training Dummy
    ovalfastlx's Avatar
    Join Date
    Jul 2017
    Location
    Redwood City, California

    Posts
    76
    Update, turns out I needed to Rejuve the k7000 tube since the recap didn't fix washed out colors. Surprisingly, theres no burn in, I'd imagine it did since it was tired out tube.

    Sent from my SM-G965U using Tapatalk

  7. #7
    Raiden's Valet
    mikejmoffitt's Avatar
    Join Date
    Feb 2014
    Location
    San Jose, CA

    Posts
    581
    In general a washed out image is characterized by poor contrast, and/or poor gamma. A tube that has poor emissions will have one or both of these characteristics.

    Before trying a restoration on the tube, I can tell you that caps in your RGB signal path need replacing on the chassis; look at the dropoff to the right of the characters on-screen. Furthermore, try bumping your individual color gains up a bit, or total contrast, if there is a knob. Brightness and bias affect the black level, so only use those to set a good black level and then go from there. You can think of the flyback's screen control as a coarse adjustment to brightness / total bias.

    I don't see any leaking caps - that looks just like normal glue used to mechanically keep things in place from the factory.

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •