I don't know why the drives in an MSD can't be replaced with 'standard' 360k drives but that doesn't seem to be an issue with the DVI; I've replaced the original drives with standard PC-compatible 5 1/4" DD drives and even with 3.5" DD and HD types (although of course the capacity remains 180k regardless of the drive used).
On Thu, Jul 22, 2021 at 9:13 AM Brian K. White <b.kenyo...@gmail.com> wrote: > I have 2 and they both had TEC FD-501 drives in them > > Apparently this is the same drive used in the coco FD-501 external drive > and interface kit. > > One of mine was dead and visually it looked like some caps were suspect > (I see some "stuff" near some caps, but it actually looks like it might > be unrelated, like some glue or something on another nearby part) > > These aren't great overall pics of the drive, I was just trying to get > reference pics of a few suspect caps and traces just on the motor board > to get their values and orientation for reference later after I destroy > the original evidence. It's not shown here but this was in a D/V-I. > https://photos.app.goo.gl/Dz5R1rGRnzYAXy9J2 > > I haven't tried recapping that drive yet to see if it fixes it, but I > did find this: > > > https://atariage.com/forums/topic/274266-tec-fb-501-from-fd-501-leaked-10uf-caps/ > > http://personalpages.tds.net/~rcarlsen/cbm/msd/REPAIRS/MSD.txt > > So bad caps are apparently a very common problem with this particular > drive, which means there's a good chance that will fix it. > > So in summary, I would test the feel of the main spindle to feel if it > spins freely or is it stiff and needs cleaning and re-lubing. And > assuming it feels fine mechanically, re-cap the whole thing and look > real close for corroded traces. > > And that idea that electrolyte can also seep inside near-by ic's and > destroy the bonding wires??? I never heard that one before but I think I > believe it. > > -- > bkw > > > On 7/22/21 8:11 AM, Jeffrey Birt wrote: > > I have not torn my DVI apart yet, so I have not seen the drive up close. > > Guessing it is a BLDC type, i.e. direct drive, not blet drive. I might > > try to remove the spinning part of the motor (probably part you are > > giving a push) and lubricate whatever bearings/bushings its shaft goes > > through. (Just thinking out loud not having seen this drive in person.) > > > > Jeff Birt > > > > *From:* M100 <m100-boun...@lists.bitchin100.com> *On Behalf Of > > *jaa...@sbcglobal.net > > *Sent:* Wednesday, July 21, 2021 9:41 PM > > *To:* m100@lists.bitchin100.com > > *Subject:* [M100] Floppy Disc Drive Motor > > > > Hi All, > > > > Fairly new here but have been enjoying the discussion and learning a lot. > > > > I am fixing a Disc/Video interface for use with my model 100. I’ve got > > everything working fine now except I have to reach in and give the > > spindle motor on the floppy disc drive a “push” from underneath with my > > finger in order to get it started. Once it’s spinning it’s fine and > > everything loads, but any time the motor stops (like after it reads a > > disc), I have to do the same thing over again, which is of course not > > very convenient. > > > > I’m assuming this is a standard drive among Tandy equipment. Curious if > > anyone who has a similar FDD has run into the same issue or has any > advice. > > > > Thanks much, > > > > James Copeland > > > > > -- > bkw >
