Panasonic KX-TC1210ALS Cordless Phone - Dead Handset

Discussion in 'Hobby Electronics' started by Dave, Feb 17, 2004.

  1. Dave

    Dave Guest

    The handset is completely dead. Battery is OK and charges OK. I've cleaned
    the buttons but no change. Phone appears to have volts on various points
    but I haven't got any circuit info.

    Any clues?

    Dave.
    Dave, Feb 17, 2004
    #1
  2. "Dave" <> wrote in message news:<zrxYb.64137$>...
    > The handset is completely dead. Battery is OK and charges OK. I've cleaned
    > the buttons but no change. Phone appears to have volts on various points
    > but I haven't got any circuit info.
    >
    > Any clues?
    >
    > Dave.


    Is that one of the models with a randomly chosen code to talk to the
    base? If the code gets out of whack the phone appears dead. You have
    to place it in the cradle for 15 seconds, remove it and try again, it
    can take a couple of goes.

    Also try taking the phone out of the cradle whilst the phone is
    ringing. That way you shouldn't have to press any buttons.

    Well thats a couple of ideas.

    Mark
    Mark van der Eynden, Feb 18, 2004
    #2
  3. Dave

    Dave Guest

    "Mark van der Eynden" <> wrote in message
    news:...
    > "Dave" <> wrote in message

    news:<zrxYb.64137$>...
    > > The handset is completely dead. Battery is OK and charges OK. I've

    cleaned
    > > the buttons but no change. Phone appears to have volts on various

    points
    > > but I haven't got any circuit info.
    > >
    > > Any clues?
    > >
    > > Dave.

    >
    > Is that one of the models with a randomly chosen code to talk to the
    > base? If the code gets out of whack the phone appears dead. You have
    > to place it in the cradle for 15 seconds, remove it and try again, it
    > can take a couple of goes.
    >
    > Also try taking the phone out of the cradle whilst the phone is
    > ringing. That way you shouldn't have to press any buttons.
    >
    > Well thats a couple of ideas.
    >
    > Mark


    I've also got one of those phones that does that. But, it lights up and
    eventually beeps when the code is scrambled.

    This dead phone shows absolutely no sign of life. Think it's supposed to
    display time and CND on the handset but it does absoulutely zilch no matter
    what I do.

    Dave.
    Dave, Feb 18, 2004
    #3
  4. Dave

    #HISH Guest

    This is (I believe) a common problem in panasonic's.
    Its caused by the failure of the filter capacitors in the PS which gives a
    noisy supply and prevents the auto programming of the code.
    I cant remember the specific cap but if you search the net you should be
    able to track it down.
    Cheers
    Wayne
    "Dave" <> wrote in message
    news:GIBYb.64353$...
    >
    > "Mark van der Eynden" <> wrote in message
    > news:...
    > > "Dave" <> wrote in message

    > news:<zrxYb.64137$>...
    > > > The handset is completely dead. Battery is OK and charges OK. I've

    > cleaned
    > > > the buttons but no change. Phone appears to have volts on various

    > points
    > > > but I haven't got any circuit info.
    > > >
    > > > Any clues?
    > > >
    > > > Dave.

    > >
    > > Is that one of the models with a randomly chosen code to talk to the
    > > base? If the code gets out of whack the phone appears dead. You have
    > > to place it in the cradle for 15 seconds, remove it and try again, it
    > > can take a couple of goes.
    > >
    > > Also try taking the phone out of the cradle whilst the phone is
    > > ringing. That way you shouldn't have to press any buttons.
    > >
    > > Well thats a couple of ideas.
    > >
    > > Mark

    >
    > I've also got one of those phones that does that. But, it lights up and
    > eventually beeps when the code is scrambled.
    >
    > This dead phone shows absolutely no sign of life. Think it's supposed to
    > display time and CND on the handset but it does absoulutely zilch no

    matter
    > what I do.
    >
    > Dave.
    >
    >
    >
    #HISH, Feb 19, 2004
    #4
  5. Hi,

    The fault you are talking will not stop handset from turning on. It will
    only prevet it communicating with base.

    I would very strongly suspect battery. If you have a power supply, use it
    instead of battery. Also, closely examine the PCB -- people drop phones and
    it may have a tiny crack. Usualy cracks appear near mounting holes.

    Rudolf

    "#HISH" <> wrote in message
    news:403506bb$0$22528$...
    > This is (I believe) a common problem in panasonic's.
    > Its caused by the failure of the filter capacitors in the PS which gives a
    > noisy supply and prevents the auto programming of the code.
    > I cant remember the specific cap but if you search the net you should be
    > able to track it down.
    > Cheers
    > Wayne
    > "Dave" <> wrote in message
    > news:GIBYb.64353$...
    > >
    > > "Mark van der Eynden" <> wrote in message
    > > news:...
    > > > "Dave" <> wrote in message

    > > news:<zrxYb.64137$>...
    > > > > The handset is completely dead. Battery is OK and charges OK. I've

    > > cleaned
    > > > > the buttons but no change. Phone appears to have volts on various

    > > points
    > > > > but I haven't got any circuit info.
    > > > >
    > > > > Any clues?
    > > > >
    > > > > Dave.
    > > >
    > > > Is that one of the models with a randomly chosen code to talk to the
    > > > base? If the code gets out of whack the phone appears dead. You have
    > > > to place it in the cradle for 15 seconds, remove it and try again, it
    > > > can take a couple of goes.
    > > >
    > > > Also try taking the phone out of the cradle whilst the phone is
    > > > ringing. That way you shouldn't have to press any buttons.
    > > >
    > > > Well thats a couple of ideas.
    > > >
    > > > Mark

    > >
    > > I've also got one of those phones that does that. But, it lights up and
    > > eventually beeps when the code is scrambled.
    > >
    > > This dead phone shows absolutely no sign of life. Think it's supposed

    to
    > > display time and CND on the handset but it does absoulutely zilch no

    > matter
    > > what I do.
    > >
    > > Dave.
    > >
    > >
    > >

    >
    >
    Rudolf Ladyzhenskii, Feb 20, 2004
    #5
  6. Dave

    #HISH Guest

    I see the problem. I neglected to read the first post -Right you are
    Wayne
    "Rudolf Ladyzhenskii" <> wrote in
    message news:HOdZb.67372$...
    > Hi,
    >
    > The fault you are talking will not stop handset from turning on. It will
    > only prevet it communicating with base.
    >
    > I would very strongly suspect battery. If you have a power supply, use it
    > instead of battery. Also, closely examine the PCB -- people drop phones

    and
    > it may have a tiny crack. Usualy cracks appear near mounting holes.
    >
    > Rudolf
    >
    > "#HISH" <> wrote in message
    > news:403506bb$0$22528$...
    > > This is (I believe) a common problem in panasonic's.
    > > Its caused by the failure of the filter capacitors in the PS which gives

    a
    > > noisy supply and prevents the auto programming of the code.
    > > I cant remember the specific cap but if you search the net you should be
    > > able to track it down.
    > > Cheers
    > > Wayne
    > > "Dave" <> wrote in message
    > > news:GIBYb.64353$...
    > > >
    > > > "Mark van der Eynden" <> wrote in message
    > > > news:...
    > > > > "Dave" <> wrote in message
    > > > news:<zrxYb.64137$>...
    > > > > > The handset is completely dead. Battery is OK and charges OK.

    I've
    > > > cleaned
    > > > > > the buttons but no change. Phone appears to have volts on various
    > > > points
    > > > > > but I haven't got any circuit info.
    > > > > >
    > > > > > Any clues?
    > > > > >
    > > > > > Dave.
    > > > >
    > > > > Is that one of the models with a randomly chosen code to talk to the
    > > > > base? If the code gets out of whack the phone appears dead. You have
    > > > > to place it in the cradle for 15 seconds, remove it and try again,

    it
    > > > > can take a couple of goes.
    > > > >
    > > > > Also try taking the phone out of the cradle whilst the phone is
    > > > > ringing. That way you shouldn't have to press any buttons.
    > > > >
    > > > > Well thats a couple of ideas.
    > > > >
    > > > > Mark
    > > >
    > > > I've also got one of those phones that does that. But, it lights up

    and
    > > > eventually beeps when the code is scrambled.
    > > >
    > > > This dead phone shows absolutely no sign of life. Think it's supposed

    > to
    > > > display time and CND on the handset but it does absoulutely zilch no

    > > matter
    > > > what I do.
    > > >
    > > > Dave.
    > > >
    > > >
    > > >

    > >
    > >

    >
    >
    #HISH, Feb 20, 2004
    #6

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