testing SFD1001 spindle speed

From: Francesco Messineo <francesco.messineo_at_gmail.com>
Date: Wed, 12 Feb 2025 14:03:34 +0100
Message-ID: <CAESs-_yqJkvCC2pZUYa66R=eqGuXFd6NNaoMeKuFXWyVS2Es_A_at_mail.gmail.com>
Hi all,
I've just recapped a Panasonic JU-570-2 with horribly leaking
capacitors that ate a few traces on the spindle PCB. Now before
assembling back the SDF-1001 I wanted to test and correct the spindle
speed if needed. However the drive motor doesn't have the strobo
patterns, so an alternate method must be used. Does anyone know if any
of the programs on the test/demo disks can help? Images as many of you
know are here:
https://www.zimmers.net/anonftp/pub/cbm/demodisks/drives/index.html
Does anyone know any test point on the spindle PCB? I think pin 6 of
the motor controller IC could be a good place to look, but I figured
out someone must already know how to do this task.
Thanks in advance.
Frank IZ8DWF
Received on 2025-02-12 15:00:01

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