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RCA/32" truflat

Discussion in 'Electronic Repair' started by [email protected], Nov 5, 2006.

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  1. Guest

    I have a 32" that has gone almost completely dark. If I crank up the
    screen control on the flyback you can just see the onscreen menu--I
    have tested the voltage at the high voltage anode and got 28,000V. The
    heater is also glowing quite brightly in the neck. Interesting thing
    is that when the neck board was pulled so I can run an ESR test on the
    caps, one pin was pulled from the tube (not sure of its exact name but
    its the one pin separated from the others) I thought that this would
    completely shut down the set but like I say its just very very dark and
    there isn't enough adjustment left to bring it back up.

    I've also noticed that adjusting the brightness slider will send the
    set completely black.


    Is this set pooched or is there another thing I should be looking at to
    get the screen back?

    Thanks!

    Stu
     
  2. Have you checked all of the voltages on the base pins?


    --
    ++++++++++++++++++++++++++++++++++++++++++++++++++++
    + Required crap appended to avoid restrictions imposed by brain +
    + damaged idiots.
    +
    + Server Response: '441 Posting Failed (Rejected by POST filter)', +
    + Port: 119, Secure(SSL): No, Server Error: 441,
    +
    + Error Number: 0x800CCCA9
    +
    ++++++++++++++++++++++++++++++++++++++++++++++++++++
     
  3. Guest

    No I haven't ,what voltage ranges should I be seeing? My only
    experience is with arcade monitors (similar but simpler and older)
     
  4. I'd compare them with the service manual. Or against the specs for the tube
    itself. I'd pay particular attention to the differences between one grid and
    the next since this affects brightness and focus.


    --
    ++++++++++++++++++++++++++++++++++++++++++++++++++++
    + Required crap appended to avoid restrictions imposed by brain +
    + damaged idiots.
    +
    + Server Response: '441 Posting Failed (Rejected by POST filter)', +
    + Port: 119, Secure(SSL): No, Server Error: 441,
    +
    + Error Number: 0x800CCCA9
    +
    ++++++++++++++++++++++++++++++++++++++++++++++++++++


    --
    ++++++++++++++++++++++++++++++++++++++++++++++++++++
    + Required crap appended to avoid restrictions imposed by brain +
    + damaged idiots.
    +
    + Server Response: '441 Posting Failed (Rejected by POST filter)', +
    + Port: 119, Secure(SSL): No, Server Error: 441,
    +
    + Error Number: 0x800CCCA9
    +
    ++++++++++++++++++++++++++++++++++++++++++++++++++++
     
  5. Guest

    What exactly do you mean when you say one pin was pulled from the tube?

    I am assuming you mean one of the pins broken off the crt, in which
    case you are probably looking at a new crt.
     
  6. Guest

    Yeah I figured as much--was sort of hoping some one would tell me it
    was a fixable thing--what a shame, a newer 32" tv to help fill up a
    landfill....Is the chassis worth salvaging?
     
  7. James Sweet

    James Sweet Guest


    Don't give up yet, if the glass is not broken, all you need is something
    kinda springy to stick in the CRT socket, or you could try some of that
    conductive epoxy to glue a new pin of some sort on.

    If air has leaked into the tube though you're screwed.
     
  8. Guest

    Interesting idea--what is the name of the conductive epoxy? I've never
    heard of that. Also, How could I positively confirm or deny if air has
    leaked in? Does the fact that I still have a picture although a VERY
    dim one mean its still working?
     
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