Series 2 DT - Color loss in one tuner.

Discussion in 'TiVo Help Center' started by ladill, Jul 13, 2007.

  1. ladill

    ladill New Member

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    Jul 13, 2007
    Nashville

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    I have a Series 2, dual tuner box that is about nine months old. Recently it has developed a color loss/color shift problem in one of the tuners. Rebooting the box seems to fix this temporarily, but the problem returns in a short time. Since rebooting helps does that mean that this is a software issue ? Regardless, can I fix this (and how) or does this box need to go in for service ? :(
     
  2. truckracer25

    truckracer25 New Member

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    Jan 22, 2007
    I had the same problem start after about 4 months. Tivo told me to do the same standard nonsense of unplug/plug it back in. This won't fix anything. It is a hardware issue, I haven't completely isolated it (I'm not a EE or TV tech) but I believe something in the second tuner overheats and so we lose color. The reason rebooting fixed it temporarily is that it gave the 2nd tuner a chance to cool down.

    I know it's a heat issue because I took mine apart, including the shielding for the 2nd tuner. Leaving the cover off and having a fan blowing on the board, I had perfect color for the last few weeks. I finally decided to put it back together and see what happened, within 3 hours I was back to the mostly no color with the 2nd tuner. I think it is really an issue that any normal TV tech could solve but I don't know. Let me know if you find out what the exact problem is or if you get it fixed.
     
  3. gastrof

    gastrof Hubcaps r in fashion

    7,486
    3
    Oct 31, 2003
    Potato and pen.
    A possible suggestion would be to improve the TiVo's ventilation and see what happens. A more powerful fan, a second fan outside the unit with a separate power supply, even a cooling unit meant for a laptop.

    I know, you shouldn't have to do this, but until TiVo admits it's a known problem and comes up with a solution, these ideas should help.

    By the way...

    What got you to reply to a post over a month old?
     
  4. truckracer25

    truckracer25 New Member

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    0
    Jan 22, 2007
    After I put my tivo back together and started getting the color loss again, I did a quick search on google to see if anyone had come up with anything and found this post. I knew it was old but I also knew that some others have this problem too so I thought I would share my (minor) findings.

    If anyone is a TV tech and has any input on how the tuner itself may relate to the color loss problem, here are the numbers from the 2nd tuner in my tivo.

    Exterior Sticker:
    SAMSUNG
    TCPN9082PC26T
    060904 LBT

    Sanyo Chip:
    LA75676
    6PYF

    Texas Instruments Chip:
    B1678
    68K
    A5RE

    I wasn't able to find a datasheet on the TI chip but I did find the one for the Sanyo chip. I also believe the Sanyo chip is probably the most important in relation to dealing with video control. Again, I am not a tech, but this seems like the most logical direction for finding the problem to me.

    I tried to post a link to the datasheet but the system won't let me add any links until I have 5 posts. I sent it to you via PM if you are interested, and feel free to add it to this thread if you want.
     
  5. beauford1313

    beauford1313 New Member

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    0
    Mar 30, 2008

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    Sorry to resurrect such an old thread but did anyone ever find a solution for this issue?

    Thanks.
     

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