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TV won't receive channel 10????

Discussion in 'Electronic Repair' started by mike, Apr 9, 2007.

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  1. mike

    mike Guest

    I've got this Magnavox 15MF050V/17 LCD TV/VGA monitor.
    Has two tuner modes AIR and CATV. Has one RF input.

    In Air mode, the setup mode automatically scans
    the channels. It properly recoginzes local VHF and UHF channels
    EXCEPT channel 10. It sets up channel 11 with a blue
    screen. If I manually force it to channel 10, I get
    a black&white picture with a lot of noise in the sound. Can't
    find any way to tweek the frequency.

    In CATV mode, it properly scans and programs all the VHF channels
    including channel 10. Channel 10 picture is great.
    But it won't get any of the UHF channels.

    The symptoms suggest to me that the tuner is ok?
    But I have no idea what's going on or how to fix it.


    Thanks, mike
  2. Bob

    Bob Guest

    What's your program source -- antenna or cable? Do you have another TV
    for comparison?

    In CATV mode, UHF refers to channels 37 and up. 14-22 ate "midband"
    between broadcast channels 6 and 7, 23-36 are "superband" between
    broadcast 13 and 14.

    Cable providers often offset the channel frequencies to prevent
    interference with broadcast signals. They may also map channels to
    different frequencies altogether.

    With the tuner set for CATV, you should be able to receive over the air
    signals, with UHF channel numbers remapped as follows:

    Broadcast 14-43 -- add 51 (14=cable 65, 43=cable 94)
    BroaDCAST 44-69 -- ADD 56 (44=cable 100, 69=cable 125)
  3. Juan Jimenez

    Juan Jimenez Guest

    Looks like someone v-chipped ya. :)

  4. mike

    mike Guest

    Can you explain what that means and how to fix it?
    thanks, mike
  5. Simoc

    Simoc Guest

    That it's programmed to refuse displaying violent content :)
  6. mike

    mike Guest

    Channel 10 is PBS...violent indeed...
    But it works fine in CATV mode???
    And there's nothing in the parental controls menu indicating it's
  7. b

    b Guest

    i cant believe anyone still uses VHF - where are you based?? in the Uk
    at least ,vhf for tv was phased out in the early 80s.
  8. jakdedert

    jakdedert Guest

    For the moment at least, in the US most of the major network
    stations--ABC, CNS, NBC--are on the lower (channels 2-5) VHF channels.

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