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  • Re: Arghh...not another problem with flo

    From NOSPAM.Ttr@NOSPAM.Ttr@darkrealms.ca (Ttr) to Jeff Hochman on Tue Feb 21 22:22:12 2023
    From Newsgroup: comp.sys.tandy

    I upgraded my power supplies in my model 3 (since the originals smoked/caug
    on fire}. Everything looks good when I reboot EXCEPT now the
    previously
    working floppy drives no longer do. I tested the power supply
    voltages and
    they look okay. I hooked
    up several different floppy drives and they all do the same thing....basica
    nothing. When I boot the crt says "Diskette?" and the floppy drive
    is
    connected but the led never lights up or spins...I don't think its
    a bad
    floppy drive as it used to more
    or less work (some errors, needed cleaning} when booting before I
    took the
    model 3 apart. Any ideas? Please don't tell me it's the floppy controller....much more cost/work to fix that.

    Jeff, the smoke likely is nothign to be concerned on your model 3 power supplies, it is usually teh RIFA Capacitors (power line filters) that
    look
    lioke yellow semi tranparent rectangles, cut them off and replace or
    use
    psu without them to test.
    regarding your floppy drive not working, Iwould open case and examine
    the
    flat ribbon cable that runs between motherboard and floppy disk
    controller
    to make sure its not rotten. I also suggest disconnectingthe top drive
    and
    make sure your not using a twisted cable for your floppy drive.
    the fdc when it fails, simply will make your mdel 3 boot directly to
    CASS?
    if it doesnt then it may still be teh FDC but liekly something else,
    caps on
    floppies can burn out.

    Patrick B. TTR ( the TexasTandyRestoration.org shop you were talking
    about.

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