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amplifier not working

Discussion in 'Electronic Repair' started by Richard, Apr 3, 2006.

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  1. Richard

    Richard Guest

    Hi,

    I have an old Fisher CA-56 amplifier. It would appear I have lost volume
    control on both speakers and the earphone jack. One of the spaekers went out
    some time ago. Lately, the other one too went out. When I was pushing or
    twisting the volume control slide, I was sometimes able to get the speakers
    working. I opend the slide volume control, and cleaned it. Now nothing
    works.

    Any idea of what's wrong?

    Regards

    Richard
     
  2. Most likely a bad volume potentiometer. No doubt the slide type
    controls are hard to get as replacement parts.

    Two channel receivers are so cheap nowadays it might be cheaper to just
    replace your old amp with a new receiver - total cost $125 or less.

    Good luck.
     
  3. b

    b Guest

    Richard ha escrito:
    test by bypassing the pot or slider, if you get full volume you'll know
    the output stage is ok! (maybe best to use a resistor or bridge with a
    pot of the same impedence as the suspect to save your speakers from a
    loud blast.)

    -b.
     
  4. Guest

    And ears! ;-)
     
  5. Guest

    Yep. But maybe it is possible to replace it with rotary one, by a
    little modding...
     
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