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Epson 5.25" floppy drive alignment

Discussion in 'Electronic Repair' started by Matt Carpenter, Nov 15, 2003.

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  1. I'm attempting to restore an old Kaypro IIx with Epson SD-521 5.25" floppy
    disk drives (DSDD).

    One drive works fine, but the second drive is misaligned. I just purchased
    an analog alignment diskette but I'm not sure which test points should be
    used.

    On the drive there is a set of three pins marked TP1, another set of three
    pins marked TP2, and a single pin labeled TP3.

    I'll need to find both head signals to adjust the radial head alignment, the
    index sensor signal to test the index sensor, and the track 0 detector
    signal.

    Are floppy drives standard enough such that they use the same names for the
    test points? Or, does someone know how/where I could find documentation on
    this drive?

    Finally, what exactly is the f and 2f signals on the alignment disk?

    Thanks, Matt
    [mkath at charter dot net]
     
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