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JVC RX-707V component needed

Discussion in 'Electronic Repair' started by mojo, Apr 5, 2007.

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  1. mojo

    mojo Guest

    I jumped the bad fuse on this unit and smoke quickly came from this
    component on the board.

    It looks like a ceramic 1 inch shoebox. It has three leads and is
    marked: A (trademark?) 3w 0.22 ohms 1 D 2.

    Is there any hope replacing this, (finding), and is this just a
    symptom of another problem.

    I've looked at Radio Shack, Quest, etc. but I obviously wish it were a
    simple resistor.

    I hope you can help me find one.

  2. Arfa Daily

    Arfa Daily Guest

    Whilst these are available, you can just as easily use two separate R22
    resistors. However, this will not be the end of the problem. That double
    resistor is the emitter resistors for the output pair, so at a very minimum,
    these transistors will be shot, and very likely, their drivers and maybe
    pre-drivers, as well as the bias compensation transistor, and probably
    several other resistors in the output pair's base drive coupling. This sort
    of failure is not to be treated lightly, and at a bare minimum, you will
    need a set of schematics, a good multimeter, possibly a 'scope, a deep
    wallet, and loads of patience ...

  3. mojo

    mojo Guest

    Thanks Arfa, I guess it's time for Best Buy. It's complicated enough
    to connect a receiver to a TV, CD, tape, mp3, and a computer. I'll
    miss this unit. I read about 150 posts. I'm amazed that anyone works
    on home electronics anymore except for a hobby.

    Tools & cash needed, plus patience! Well put.
  4. Arfa Daily

    Arfa Daily Guest

    If you go at the stuff with the right tools, and enough years' experience,
    there's still good money to be made from it - especially if you can get
    hooked into trade warranty repairs, which pay a fixed amount whether you get
    a fix or not, but I take your point. As long as there is only one or two of
    you doing it in an area, then it's still ok. As soon as you are in
    competition with more than a couple of others, then work becomes thinly
    spread these days, and it gets to be a struggle. If you can find a
    specialist niche it helps.

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