Strange fault in Fisher FM-60 tuner

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  • Jooo
    Badcaps Veteran
    • Oct 2011
    • 222
    • Finland

    #1

    Strange fault in Fisher FM-60 tuner

    I have this Fisher FM-60 tuner that is behaving strangely.

    It won't find any radio channels, unless I spray a little bit of cold spray to the tuner area.

    After that, it immediately finds the channels and will work flawlessly for weeks.
    Last time I left it running for 48 hours continuous and no problems. I also tried to unplug it for some days and it still worked.
    I heated the tuner area with a hair dryer without any affect on the functionality.

    Then one day, about two weeks after the last cold spray I was listening to the radio, all of sudden it lost the tuning again, and won't work again without a small bit of cold spray.

    I have now cold sprayed it three times, and it will always work for couple of weeks after that. I couldn't find any cold solder joints.
  • Ed Hall
    Member
    • Sep 2014
    • 30
    • USA

    #2
    Re: Strange fault in Fisher FM-60 tuner

    My first inclination was toward a cold solder joint, as well, but I see it mentioned at the end of your message.

    I have also used the following two methods in similar situations:

    1- carefully let a little of the freeze spray out easily, so you get a drop and catch it with a small tool. Then place the drop onto an active component, and then continue one component at a time.

    2- tap lightly with a small screwdriver at some of the locations where the freeze spray worked. Be careful not to short anything.

    Of course, this will all have to be done at a time when the unit is broken...

    Comment

    • jake51563
      New Member
      • Dec 2014
      • 1
      • usa

      #3
      Re: Strange fault in Fisher FM-60 tuner

      Have a p3 halo but dont no which caps to replace. Like coupling caps in a tube pre

      Comment

      • budm
        Badcaps Legend
        • Feb 2010
        • 40746
        • USA

        #4
        Re: Strange fault in Fisher FM-60 tuner

        Is it FM-60 or KM-60?
        BTW, for localize cooling, I use Q-TIP.
        https://www.badcaps.net/forum/showth...ht=ln32b540p8d
        Last edited by budm; 12-17-2014, 11:51 PM.
        Never stop learning
        Basic LCD TV and Monitor troubleshooting guides.
        http://www.badcaps.net/forum/showthr...956#post305956

        Voltage Regulator (LDO) testing:
        http://www.badcaps.net/forum/showthr...999#post300999

        Inverter testing using old CFL:
        http://www.badcaps.net/forum/showthr...er+testing+cfl

        Tear down pictures : Hit the ">" Show Albums and stories" on the left side
        http://s807.photobucket.com/user/budm/library/

        TV Factory reset codes listing:
        http://www.badcaps.net/forum/showthread.php?t=24809

        Comment

        • budm
          Badcaps Legend
          • Feb 2010
          • 40746
          • USA

          #5
          Re: Strange fault in Fisher FM-60 tuner

          Originally posted by jake51563
          Have a p3 halo but dont no which caps to replace. Like coupling caps in a tube pre
          Are you asking about PARASOUND P3 HALO PRE-AMP?
          If it is, please start a new thread with make. model, and problem you are having.
          Never stop learning
          Basic LCD TV and Monitor troubleshooting guides.
          http://www.badcaps.net/forum/showthr...956#post305956

          Voltage Regulator (LDO) testing:
          http://www.badcaps.net/forum/showthr...999#post300999

          Inverter testing using old CFL:
          http://www.badcaps.net/forum/showthr...er+testing+cfl

          Tear down pictures : Hit the ">" Show Albums and stories" on the left side
          http://s807.photobucket.com/user/budm/library/

          TV Factory reset codes listing:
          http://www.badcaps.net/forum/showthread.php?t=24809

          Comment

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