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Found 11 results

  1. Hello, Does anyone know why the 1.44 floppy drive from my Macintosh Classic only reads floppy disks when it's not installed on the brackets? While it's connected without the brackets it reads very reliably. As soon as I install the floppy drive in its bracket, the drive reads the system software disk, the Macintosh icon appears, and then it will eject the floppy. That never happens when the drive its outside its bracket. I checked if everything was well installed, if the floppy gets stuck in the opening of the drive, but nothing. Everything looks normal. Thanks.
  2. Yes, even 400K floppy drives need to be recapped. This video walkthrough holds your hand through the process. I show a few clips of Epyx Winter Games at the end. The bootable 400K DSK image I created yesterday is now on Macintosh Garden. https://youtu.be/71Lz9OjJFe8
  3. I finally finished my video on recapping the SONY CR-44 PSU, which can be used in the SE and SE/30. The video is long but informative. A Mouser Cart is linked in the text description under the video (you'll have to watch it on YouTube to see that), for those of you wanting to easily purchase all the electrolytic capacitors required. You also find a link in that description to my SEASONIC PSU replacement video, for those of you who haven't seen that one either. There's still reason to recap the SONY PSU though -- it's fanless and dead silent when operating. If you have only 1 PDS card and
  4. Just uploaded my Apple Hard Disk 20SC recapping video, which also covers the 40SC, 80SC and 160SC since they all use the same SONY CR-43 PSU. Check the text description for a Mouser Cart and useful info. At the end, I do a boot test with a 2015 15" MBP.
  5. I'm in the planning process to recap the SONY PSU housed inside my Apple HD20SC external hard drive enclosure. (I might make a video.) I've got a Mouser cart filled with mostly Organic Polymer Aluminum Electrolytic capacitors for that PSU (see below), which have very low ESR down to between 12mΩ and 43mΩ. There are many benefits to low ESR capacitors, and the life rating on them is very high compared to regular aluminum electrolytics. But my concern is that the output of some switch-mode (switching) power supplies can ring if the ESR of the output capacitance is too low (as per the data sh
  6. After a diskette completely jammed in the floppy drive, I was forced to pry it out with pliers. Unfortunately, such a procedure is far from delicate, and the top drive head was damaged and put out of place. (Actually, I managed to damage the head before even attempting the pliers; they were simply a last resort..) Attached are photos of its current state. Shoulda-woulda-coulda, the deed is done; is it repairable, or is it time for a replacement? I should say, the drive was never ejecting properly in the first place, even after cleaning and relubricating, as well as repl
  7. Hello crews, yesterday I turned on my Power Mac 6100 and noticed that the floppy drive has suddenly stopped working. Last month, it was fully functional - I could read, write and format floppies just fine. I've disassembled the computer, reseat the cables and checked for the presence of all required voltages (+5V, +12V and -12V). Anything looks good. The drive in question is Sony MP-F75W-12G (Apple-Nr. MFD-75W-01G). When I insert a disk the disk motor spins on for 2 seconds. Then it stops and nothing more happens. Any ideas on what the cause for this failure could be? Is th
  8. From the album: Macintosh SE/30

    SE/30 Sony power supply after a full recap. Here's the cap list from DigiKey. It will not work for the Astec version. A couple of notes: 1. The "big guy" capacitor (620uF, 400V) is no longer made. The one in the list has a slightly higher capacitance at 680uF. The protection circuit (limiter) in the power supply can easily handle the negligible jump up to 680uF. Something very important, however: the legs on the replacement capacitor are not going to match the slits in the power supply board. I had to widen and lengthen the corners of the existing slits for the new capacitor to fit. I use
  9. From the album: Macintosh SE/30

    Solder-side view of the Sony power supply. Contacts cleaned and ready for new capacitors.
  10. From the album: Macintosh SE/30

    All capacitors have been removed from the Sony power supply and is now ready for the replacements to be installed. Copious amounts of electrolytic fluid has been cleansed from the board.
  11. I recently acquired a working, but neglected Quadra 840AV. It came with 3 hard drives installed, an original CD-ROM drive, and with a 64 MB of RAM. It clearly needed a total recap of a motherboard and a good cleanup, which I did. Then I tested the machine, and I found out that a CD-ROM drive wasn't detected, even that it was connected properly. I figured out that it must be the drive that failed. Then I cracked open the Sony CDU561-25 drive, and to my surprise, I found capacitors that have leaked and corroded the PCB. The damage was quite bad, but fixable. There was a group that leaked, a
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