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Pixelation on ALL stations

Discussion in 'TiVo Series3 HDTV DVRs' started by dbenrosen, Oct 26, 2013.

  1. dbenrosen

    dbenrosen New Member

    462
    0
    Sep 20, 2003
    New Jersey
    The problem was just on the HD (S3 actually). The Premiere was fine. Moving the cables around had no effect on the Premiere. When I first connected the S3, it was not having the problem, where in the past it was almost constant. I watched the S3 for a few minutes and did not have a single instance of pixelation. I then placed reset the TiVos in the cabinet as they should be.

    Then the kids watched some TV, but were watching on the Premiere because the S3 was recording stuff on both tuners. Later when I tried to switch back, the picture was back to pixelating.

    I was thinking it could be related to the HDMI connection, but that seemed unlikely because the sound is a separate connection to my audio system and it has problems at exactly the same time as the pixelation occurs.

    Are the power supplies between TiVos interchangeable at all? I have a TiVo HD in another room (same model series as the S3). Any chance I can try that power supply in the S3?
     
  2. unitron

    unitron Active Member

    16,389
    2
    Apr 28, 2006
    semi-coastal NC
    The 648 (OLED, first of the S3s) has a 3Y Power Technology power supply design unique to it, and the 652 and 658 (HD and HD XL) use the same supply but there are two versions of it, one made by 3Y and one made by AcBel. All are subject to an increasingly likely chance of "capacitor plague".


    The pinout for the plug that goes to the motherboard socket is the same on all 3 of these supplies EXCEPT for the extra wire (gray, 7.5 Volt) on the 648 supply, so you can put an HD or HD XL supply into a 648 for test purposes, but since we don't yet know what, if anything, that gray wire would connect with, or short to, on a 652 or 658 motherboard, do not use a 648 supply anywhere except a 648.

    Supposedly that 7.5 Volt output on the 648 supply is just for the front panel OLED display.
     
  3. sfhub

    sfhub Active Member

    1,270
    0
    Jan 6, 2007
    Sometimes with electronic components that are beginning to fail, they work OK when cold (ie just started) but as they warm up, the electrical characteristics start going more out of spec, enough that you start noticing the symptoms. That might be the power supply or some other component on the board, but the power supply would be a good place to look given what you have tried already.
     
  4. dbenrosen

    dbenrosen New Member

    462
    0
    Sep 20, 2003
    New Jersey
    I was able to keep it cool enough by moving the S3 out of the cabinet and next to the TV. It has been working correctly now for over 3 days. This is an acceptable temporary solution until I have time to replace the caps that are bulging slightly.
     

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