Sharp MZ-80K Power Supply repair

January 13th, 2013 Leave a comment Go to comments

Have been replaced 4 tantalum capacitors short-circuited with 4 electrolytic capacitors. The computer has been tested and works perfectly.

Categories: Gallery, Projects / Repairs, Retro Computers and other stuff..., Sharp, Today, Various
  1. Michael
    January 27th, 2013 at 17:34 | #1
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    Thanks for sharing the photos. I was wondering if you remember their values and which one fits where? The capacitors on my PSU blew up and am unable to determine their value.

    Thanks
    Mick

  2. xAD / nIGHTFALL
    January 27th, 2013 at 19:52 | #2
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    @Michael

    Hi Michael,

    The values are: 10uf 55v

    Here the Service manual core and powersupply of MZ80k:

    http://www.sharpmz.org/mz-80k/download/sm80k.pdf

  3. Ged
    July 9th, 2013 at 00:06 | #3
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    Thanks to your useful instructions, my MZ-80K is now running again!!

    Thanks
    Ged

  4. Phil Steele
    December 3rd, 2015 at 20:35 | #4
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    Hello, I have a Sharp MZ80K also and have the same problem with the power supply.

    Having not used the computer for quite some time when I switched it on smoke started coming from the power supply so I switched it off straight away.

    Do you repair these power supply’s?

    Thanks Phil

  5. Paul hudson
    October 14th, 2018 at 00:37 | #5
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    Yes same thing happened to me . Plugged in psu to test output voltages and it blow the Tantalum cap all but one now looking into replacing them with electrolyte cap.

  6. Paul hudson
    October 14th, 2018 at 15:00 | #6
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    @Michael
    Just wodering if you ever managed to get it Fixed

  7. Peter
    February 25th, 2022 at 19:31 | #7
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    Hello, I have a Sharp MZ80K and have the problem with the power supply, after connecting to the power supply, the F101 500mA fuse is blow in the power supply, do you have any idea what the matter may be?
    Thank You Peter

  8. Nigel Percy
    March 7th, 2022 at 19:53 | #8
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    @Peter
    Fairly certain it will be the same problem as above. Mine had the same issue. Shorted tantalum capacitors.
    There are four of them, I would replace all four even if they are not all shorted.

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