Amiga.org
Amiga computer related discussion => Amiga Hardware Issues and discussion => Topic started by: nineoc on September 04, 2006, 04:25:18 AM
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Can anyone tell me what is pin one for the ribbon cable on a Chinon FB 354 floppy drive? If I am reading the circuit board right, it appears to be at the left side of the drive, looking from the rear. Will reversing the ribbon cable damage the drive?
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Pin 1 is on the side farthest from the power connector. Reversing the cable won't damage the drive, it just grounds out all the signals.
On a PC drive, reversing the cable will definitely damage disks (it causes the motor to spin and the write head to be active.) I have never reversed a cable on the Amiga, so I don't know what will happen to a disk in this case.
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I've seen the cable switched on lots of PC's, and never seen a floppy drive go bad from this. If you turn on your system and the floppy drive light stays on solid, you have a pretty good indicator that your cable is plugged in backwards.
Power the system off, reverse the cable, and all should be fine.
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Thanks to all. It seems to be okay.
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Hi everybody.
I have been trying to adapt a Chinon FZ-357 (PC drive) to my miggy, but it apparently was one of the non-compatible ones. The DC seemed to be not working. Well I refused to believe that the conversion was impossible as widely said, and started to study the drive :inquisitive: . When "jumped" and attached to the Amiga, it didn't even emmited the charming click. What came to my mind was that the DC was not connected. Then I made a kludge: I cut the tracks of the density selection switch and shorted them (always DD), and connected the switch to the GND and DC pins on the connector. Voila - the drive now works :-D . But it is still behaving strange - when the Amiga is turned on, the drive seeks for a disk for some time (as if DC indicates disk in), and gives up, without clicking. If I insert a pen inside the drive and make a single push in the button, the drive starts clicking. What have I done wrong? Yes, I haven't used a latch for switch debouncing, could be this the problem or not? The switch seems to be open when the disk is in, is that correct? :headwall: I wasn't able to find info about the convention used for the drive signals, like timings and levels of DC and Ready for instance. If anybody here knows a pointer, I would be enourmosly thankful!
Nibble