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Thread: Horizontal green lines

  1. #1
    Join Date
    Dec 2005
    Location
    Christchurch, New Zealand
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    463

    Unhappy Horizontal green lines

    I have just set up a TiVo for someone including a PAL tuner mod, and it is displaying flickering horizontal green lines on live TV (a line every few seconds).
    I found this post http://forums.oztivo.net/showthread.php?t=96 recommending replacing the board. However reading this post http://archive2.tivocommunity.com/ti...8&page=1&pp=30 implies that in most cases this problem could be fixed by updating to software version 3.0.1.A1-01-1-000. As you know the version we all use is 3.0-01-1-010.
    Does anyone have a copy of whatever files are in the 3.01A update so I can try them?

    It would be less hassle than replacing the MPEG encoder chip (of which I happen to have a spare).
    Thanks,
    John

  2. #2
    Join Date
    May 2004
    Location
    Victoria
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    1,239
    Software upgrade won't fix it. You'll need to replace the Sony CS22 MPEG encoder.
    Darren King
    OzTiVo Repairs and Modifications
    If your TiVo requires repairs or modifications
    then visit: http://kingey1971.wix.com/tivorepairs

    NOW ALSO REPAIRING FETCH TOO!

  3. #3
    Join Date
    Apr 2004
    Location
    Perth, Western Australia
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    3,037
    We have tried the A1 version before, and it has not fixed the green line flash.

    A temporary fix may be to just add a heatsink to the mpg encoder, but as Darren has said the unltimate fix is to replace it.

    Peter.
    Please search this forum and our Website for your TiVo questions before starting a new thread. Thanks!

  4. #4
    Join Date
    Dec 2005
    Location
    Christchurch, New Zealand
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    463

    Angry MPEG encoder IC not the cause.

    I've replaced the Sony CXD1922Q MPEG encoder and the green lines are still present! I suppose it could still be one of the associated components eg capacitor or crystal.

    Darren, do you think it could be the SAA7114H video decoder?

    Peter, any chance you could find that software?

    Thanks,
    John

  5. #5
    Join Date
    Apr 2004
    Location
    Perth, Western Australia
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    We probably should have got you to check whether it's an encoding or decoding problem first.

    can you download one of your recordings and watch it on your pc and see if the green line is present.

    From memory we merged the changes in 3.01a into the current r1.6.2 OzTiVo release.

    Due to a failure of my Raid5 array a few months ago, I no longer have the virgin US 3.01a image.

    Peter.
    Please search this forum and our Website for your TiVo questions before starting a new thread. Thanks!

  6. #6
    Join Date
    Dec 2005
    Location
    Christchurch, New Zealand
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    463

    Playback on PC

    Good thinking Pete, I had just assumed that it was in the recording process, not the playback (due to all the posts I had read). Now I've proved it.
    I finally managed to get TyServer going, single socket connection was the secret.
    The green lines are still present when the .ty file is played back on the PC.
    Now to decide what to fix..

  7. #7
    Join Date
    Apr 2004
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    Perth, Western Australia
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    Most of the time it is the encoder.

    Darren is the hardware expert here. I believe he is away for a few days though.

    Peter.
    Last edited by petestrash; 18-02-2008 at 08:47 PM.
    Please search this forum and our Website for your TiVo questions before starting a new thread. Thanks!

  8. #8
    Join Date
    May 2004
    Location
    Victoria
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    Well, next thing on the list is the SAA7114H. If it is still present then I'm stumped as it is either the CS22 or the SAA7114H.
    Darren King
    OzTiVo Repairs and Modifications
    If your TiVo requires repairs or modifications
    then visit: http://kingey1971.wix.com/tivorepairs

    NOW ALSO REPAIRING FETCH TOO!

  9. #9
    Join Date
    Apr 2004
    Location
    Perth, Western Australia
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    If the recording has green lines, I don't see how it would be the Saa7114H.

    Peter.

    Edit: wrong chip ignore this post.
    Last edited by petestrash; 19-02-2008 at 02:11 PM.
    Please search this forum and our Website for your TiVo questions before starting a new thread. Thanks!

  10. #10
    Join Date
    May 2004
    Location
    Victoria
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    The SAA7114 is the input video switcher and filter which is in the recording circuit.

    You are thinking of it's counterpart, the SAA7120, which is (in simplistic terms) the reverse of the SAA7114 on the playback side.
    Darren King
    OzTiVo Repairs and Modifications
    If your TiVo requires repairs or modifications
    then visit: http://kingey1971.wix.com/tivorepairs

    NOW ALSO REPAIRING FETCH TOO!

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