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| Macintosh Classic II internal floppy issue |
Posted by: felangga on 2023-05-21 12:18:08
Hello, I'm just finished recapping my old Macintosh Classic II and now toward fixing the internal floppy.
The internal floppy would boot into a happy mac logo but then eject the floppy.
But this would not happen when I'm using the same floppy but used as external floppy (using cable from DB19)
Voltage is stable around 12.05v and 5.04v.
Already changed the ribbon cable and tried to disable some pins related to red/yellow stripes issue.
Already tested for continuity from the ribbon connector to the SWIM chip and to the DB19 connector and no issue.
From the schematics, the difference between the internal floppy connector and db19 is the bourne filter (RC3) and no issue from the continuity test.
Anyone can recommend me any solution to this issue? |
Posted by: ClassicGuyPhilly on 2023-05-27 06:06:39
Hi - I can't say for sure but I recently found this excellent (albeit long) video on restoring vintage Mac floppies. He does mention a failure mode where disks eject by themselves. I'm going to be following to restore an 800kb drive, and I ordered this grease based on recommendation from the Board. Good luck!
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Posted by: felangga on 2023-05-27 07:55:05
Hello, thanks for replying.
I'm finally able to read and write using the drive.
I don't know exactly why. Previously, I'm trying to read a disk that has been written from WinImage. This would not work when I'm using floppy internal cable, but would work when using cable from DB9 connector. But yesterday it's working with the internal floppy connector. |
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