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Oscilloscope repair Tektronix 2246 Chicago

Discussion in 'Electronic Repair' started by [email protected], Jun 1, 2007.

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  1. Guest

    Hello everyone my Tektronix 2246 oscilloscope just went out on me
    tonight. First it started making frequencies noises randomly, then it
    took multiple tries to get it started. Now it just makes chirp and
    doesn't start all together. I opened it up at looked at the power
    supply and it looks fine, no obvious damage. Is there a common problem
    i could fix on my own? Can someone recommend a good repair shop in the
    Chicago land area.
    Thanks
    Rich
     
  2. carneyke

    carneyke Guest

    Could be bad capacitors in the power supply, they can cause audible
    noise.
     
  3. Bad/dry caps in the Tektronix pwr supply of this 22xx scope are a
    common failure, results are as you described.
    If you can chk and change the caps, it should be worth the effort.

    gd luck.


    hth,
    Andreas
     
  4. Jim Yanik

    Jim Yanik Guest

    Don't forget to use *low-ESR* switcher-grade caps.Since the 2246 PS uses
    odd value caps,the next closest standard value over the uf and voltage
    ratings will suffice.

    Also,the 2246 PS is underneath the top board;that has to be lifted to
    access the PS board,but the PS unplugs.
     
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