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"HELP" 46" Projection TV

Discussion in 'General Electronics' started by Sparky, Oct 11, 2003.

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  1. Sparky

    Sparky Guest

    I Have a 1987 46" RCA Projection TV that keeps blowing a fuse. The
    sound stays on but the picture is blank. It flashes a red screen then
    goes blank. I change the 2 Amp 250V fuse and it is back on. Everything
    works perfectly. Is there someone out there that knows what the
    problem is or who can help me diagnose the problem. It has a hitachi
    chasis and I have the schemadics.
  2. N. Thornton

    N. Thornton Guest

    Its gonna take a lot more input and info than that. So unless you have
    more understanding, not really.

    The good news is that fuse popping is one of the easier types of fault
    to locate and fix, usually.

    Regards, NT
  3. Sparky

    Sparky Guest

    The Tv is a 1989 ColorTrak 2000. It has a hitachi chassis. Model
    number P46000T
    The repair person who took this in and just put the fuse in without
    any other diagnoses said it could possibly be a burned 1K resistor
    near the EHT. (i don't know what that is) or it could be a drive
    problem that effects the transister that makes the fuse go out. Also
    another possibility could be a high voltage splitter problem (169).
    Does this information help you? The repair guy said unless it starts
    to smoke and something actually burns out that it would be hard to
    find the problem. Do you feel the same way?
    Thanks A lot,
  4. N. Thornton

    N. Thornton Guest

    Maybe you could try a more able repair person. G'luck.

    Regards, NT
  5. Sparky

    Sparky Guest

    Maybe you can tell me what kind of information are you needing?
  6. N. Thornton

    N. Thornton Guest

    OK. Type of power supply, which section of the circuitry is drawing
    the excess current, which components are overheating, if any, test
    results for the LOPTr, whether EHT is present, and so on. Basically
    information only a repair peson would be able to find.

    From what you say I'd pick another repair person, and always always
    pick the free quote.

    Regards, NT
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