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Phillips TV does not hold default channel

Discussion in 'Electronic Repair' started by ms, Jun 17, 2007.

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  1. ms

    ms Guest

    I got a used 1992 Phillips 21" set. Set it manually to channel 73 for Dish
    Network, to replace a smaller set at the same RF connection. It worked
    normally with Dish Network, where the remote changes channels. Turned it
    off, still plugged in and connected to Dish Network.

    Next day, turned it on, it did not retain the previous channel 73 setting,
    had defaulted back to channel 2.

    The smaller older set was a 1985 Toshiba, but it retains the last channel
    setting used, like any other TV I've used.

    Is there a problem with the Phillips, or is this common in newer sets?

    ms
     
  2. b

    b Guest

    ms ha escrito:
    if you turn it off into standby with the remote, it should probably
    switch on with the last channel watched. If however the hard on-off
    switch on the set was used then it will revert to the forst channel
    tuned in. in your case 2.

    -b
     
  3. Meat Plow

    Meat Plow Guest

    Should come back on with the channel it was shut off with unless you
    unplug it or lose your power otherwise so no it's not normal.
     
  4. Arfa Daily

    Arfa Daily Guest

    Very common for the backup battery to fail on old Philips sets. Just replace
    it.

    Arfa
     
  5. ms

    ms Guest

    There is a battery to retain the prevous channel setting?

    I doubt my 1985 Toshiba has a battery.

    ms
     
  6. ms

    ms Guest

    No remote, so a hard off each time. Basically same with my 1985 Toshiba,
    no standby, the Dish Network remote was used for power off. And it kept
    it's channel setting.

    ms
     
  7. b

    b Guest


    many sets of that era used either a battery (if I recall philips were
    usually 2.4v 110 mAh ) or a low voltage capacitor with a very high
    capacitance value.
    this served to feed the micro when set was off, and thus retain the
    channel presets, user preferences for colour, brightness, vol/tone
    (sound) etc.

    -b-
     
  8. Meat Plow

    Meat Plow Guest

    Is that in a place where Joe Blow can find it?
     
  9. JANA

    JANA Guest

    Make sure that the TV's AC cord is plugged directly to the main outlet, and
    not through the decoder box (dish box).

    Many models of TV sets, when switched off, if they loose the AC supply, the
    default user memory will be re-set to the default.

    If the TV set is being used properly, it is possible that there is a defect
    with the internal memory of the TV set in the area that works with the user
    set-up. In this case, the set will have to be serviced. Some sets use an
    internal battery, while some other's use an internal memory built in to one
    of the microcontroler chips. If the fault is not directly from a memory
    battery, then servicing the set can get fairly involved.

    --

    JANA
    _____


    I got a used 1992 Phillips 21" set. Set it manually to channel 73 for Dish
    Network, to replace a smaller set at the same RF connection. It worked
    normally with Dish Network, where the remote changes channels. Turned it
    off, still plugged in and connected to Dish Network.

    Next day, turned it on, it did not retain the previous channel 73 setting,
    had defaulted back to channel 2.

    The smaller older set was a 1985 Toshiba, but it retains the last channel
    setting used, like any other TV I've used.

    Is there a problem with the Phillips, or is this common in newer sets?

    ms
     
  10. Arfa Daily

    Arfa Daily Guest

    Been a long time since I did one, but as I recall it was, as b said above, a
    2.4v NiCad, and I seem to recall that it was near the front of the chassis
    around the middle somewhere. Quite obvious once the chassis was withdrawn. I
    think it was like two small button cells sealed together in heatshrink
    sleeving, and I seem to think two pins on one end and one on the other so
    that you couldn't get it in the wrong way round, but as I say, been a long
    time ...

    Arfa
     
  11. Meat Plow

    Meat Plow Guest

    Wonder how good with a screwdriver the OP is? Most are not going to bother
    looking but yah never know :)
     
  12. ms

    ms Guest

    We will shortly go off Dish Network, just use a roof antenna, then with
    only 5 local channels, changing the channel manually will be no problem.
    And with so little to watch, I usually only watch the PBS channel anyway.

    ms
     
  13. Arfa Daily

    Arfa Daily Guest

    ?????????????????????

    Arfa
     
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