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Panasonic TV

Discussion in 'Electronic Repair' started by Gummo, Jun 20, 2007.

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  1. Gummo

    Gummo Guest

    When I try to turn on from standby the only response from the set is that
    the standby light goes off, followed by a bird-like cheeping sound which
    lasts 6 seconds when the set goes back to standby.



    Any ideas?



    Gummo
     
  2. Meat Plow

    Meat Plow Guest

    If you've never fixed a TV, get it to someone who can.
     
  3. BH

    BH Guest

    Meat Plow:

    I ran a fairly large service operation back in the '60's and I've just
    got to love some of your comments.

    Right on!

    BH
     
  4. AJ

    AJ Guest

    Check for excessive loads on the power supply inclusive of shorted H-output,
    audio output, etc. Chirping noise is the SMPS informing you there is
    something overloading one or more of the supplies. BTW ignore the trolls,
    post what actual diagostics you have actually done along with the model and
    chassis numbers of the set.
     
  5. Meat Plow

    Meat Plow Guest

    I did major manufacturer warranty consumer electronics in the 80's. At one
    point I worked 9-5 then 6-9 part time. When someone posts a message in a
    repair group describing symptoms but not giving any background in what
    they know I have to assume they know nothing and give them an honest
    and appropriate answer given what's currently known. I could have told the
    OP to check the smps for high esr caps and a host of other things but
    usually someone else chimes in with that stuff. Plus, I'm out of the loop
    on many newer smps designs having more experience with the old RCA scr
    output sets, tube sets, and more simple portables. I did however fix my
    52" Panasonic set when it blew the STK devices in the convergence. That
    was my first and a wonderful experience here in sci.electronics.repair
    when I posted a couple messages seeking help and got it.
     
  6. Meat Plow

    Meat Plow Guest

    Bird-like cheeping was the OP's diagnostics.
     
  7. Gummo

    Gummo Guest

    I was hoping to avoid hauling the brute to the engineer by dint of one of
    you boffins' declaration that the set was beyond fixing (via its
    Springwatch-esque symptoms}.

    Gummo
     
  8. Gummo

    Gummo Guest

    Thanks AJ. Unfortunately, I haven't a clue about electronics repair; I was
    just wondering if it was worth taking to the engineer which I will do
    tomorrow based on your recommendation.

    Gummo
     
  9. Jerry G.

    Jerry G. Guest

    You'll have to give the set out for this one. It is impossible to guess at
    this type of problems without troubleshooting the set. Most of the failures
    are in the scan amplifiers and the power supply.

    --

    Jerry G.
    ======


    When I try to turn on from standby the only response from the set is that
    the standby light goes off, followed by a bird-like cheeping sound which
    lasts 6 seconds when the set goes back to standby.



    Any ideas?



    Gummo
     
  10. Gummo

    Gummo Guest

    Thanks Jerry - will do.

    Gummo
     
  11. Meat Plow

    Meat Plow Guest

    Well you never mentioned how old it was and that would help.
     
  12. Gummo

    Gummo Guest


    Apologies - it would've made sense. It's a 1998 Panasonic TX-25MK1L.

    Gummo
     
  13. Meat Plow

    Meat Plow Guest

    Not too old for a trip to as you put it "the engineer." Get a quote on the
    cost of repair before it's worked on and post it here. See if you can get
    details as to what's at fault. This is a set I could work on provided I
    had the service manual, dusted off my scope, cleaned off my best
    reading glasses and cleared all the crap off my bench :)
     
  14. Gummo

    Gummo Guest

    Will do - thanks.

    Gummo
     
  15. Gummo

    Gummo Guest

    I was recommended a good engineer who fixed the set for £30.

    Thanks to all.

    Gummo
     
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