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Yes, it's one of the very early 6100, 60 MHz, from the beginning of 1994. Nothing. As I said earlier, this drive was in the working condition two months ago. There is a high probability that the electrolytic caps installed in this device, namely high-quality japanese capacitors by Nippon...

I checked the stepping motor. It's a bipolar Minebea 08BJ-H031-41 with 4 wires. Each of the two windings has a resistance of approx. 90 Ohms. I was able to drive the motor away from the zero track sensor by alternately attaching a 9V battery to the windings and switching the polarity. After...

Please find the picture of the front cover attached. The floppy drive slot is to the right, right above the power button.

Sorry for overlooking the difference between "inject" and "eject". The emergency eject hole is located to the right of the drive.

My PM 6100 has an auto-eject one. It's Sony MFD-75W-012G, known as Superdrive. See the attached picture. Moreover, it doesn't reveal any mechanical problem. It has simply stopped working...

Yes, I did. The head doesn't even move abit. Is there any easy-to-do test to ensure that the floppy disk controller (SWIM III) is operational? Anyway, I'll try to clean and to re-grease as you suggested. I suspect a failure of an electronic component, not sure which one...

Be careful when touching/cleaning this part!

To my understanding, the track 0 sensor is a small PCB containing the so-called optical interrupter. It's marked with a red lasso in the attached picture.

Good question. I have to take look into my drive...

Thank you, I'll check it out. Booting from HDD works but the OS doesn't recognize any disk in the floppy drive...

"FMD" is surely a typo. It should be "MFD".

My Superdrive has both Apple and Sony part numbers on the disk motor: MFD-75W-01G MP-F75W-12G No clue which one belongs to Apple and which one to Sony.

Well, I have a (probably broken) Sony MFD-75W-1G as well, see this thread: https://68kmla.org/forums/index.php?/topic/30963-sony-superdrive-stopped-working/ Let's join our efforts and see what we can do. If the head stepping motor keeps running, there could be an issue with the zero-track...

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...

Especially, the traces around C10 look like they were broken or shorted...

It looks like your logic board has been recently recapped. I see three non-original tantalum caps to the left of the SWIM chip on your picture. I'd suggest to check them as well to ensure there is no shorted traces or bad solder joints...

 + 1. Check everything in this area for broken/shorted traces.

I've just tried to power on the machine with the SCSI cable disconnected. I hear the startup bong, then the gray screen appears. After a while, the floppy disk with a blinking question mark in the middle is displayed. The floppy drive isn't operational. This indicates an issue either with the...

The SWIM chip on the SE/30 is located near the internal floppy connector J8. It's marked as 344S0061-A.

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...