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Where did the controls go????

Discussion in 'Electronic Repair' started by Jim Poore, Feb 27, 2006.

  1. Jim Poore

    Jim Poore Guest

    Please help an old TV repairman who started out with <gasp> tubes. I
    opened up a GE color TV to set the levels and gain of the RGB signals
    and to my suprise nothing on the neck board and nothing on the main pcb.
    Am I S.O.L. with the green background or is there some special button
    pushing sequence on the front to get to a service mode to set these

    Thanx in Advance
  2. tvguy

    tvguy Guest

    You need to do this in the service mode. Tell me alittle bit of wha
    type of tube things you worked on
  3. John-Del

    John-Del Guest

    The label inside the TV tells you the sequence you need to get into the
    service menu. This info is also commonly available on the net.
    However, unless the adjustments you need to make are minor, no amount
    of screwing around in the service menu will compensate for a bad CRT or
    bad T1 chip.

  4. Jerry G.

    Jerry G. Guest

    Most of the TV's and monitors today, use a service mode for performing
    adjustments. Some models can have the service mode accessed via the
    remote control, while others use a dedicated external interface device
    of some type. In most cases, the shop service manual is required to use
    the service mode.

    If any parameters have changed in the set, proper service to locate and
    change the defective components should be done, rather than mess with
    the service mode. The service mode has been set up during the
    manufacturing process. Once done, it hsould not ever need to be teaked,
    unless a critical part has been changed.

    Jerry G.
  5. Jim Poore

    Jim Poore Guest

    Oh...I worked on just about everything that used tubes but mainly my
    specialty was working on Hi-Fi Audio and Musical Instrument stuff.
  6. Jim Poore

    Jim Poore Guest

    No....nothing like a bad crt or anything...After working on TV's for
    some 40+ years when I happen to watch a nlack & white episode of
    Twilight Zone, I want it black and white, not black and green, thats
    all. Its jus your basic crt aging with one gun being a bit more
    predominate than the other two.

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