Posted By
BushRat
on 2002-07-17
|  Hmmm..
Could be a flakey PLA chip or the expansion slot. I don't have access to my 1551, packed away, but check to make sure the carrier/track stop sensor is clean. You should see the optical stop sensor off to the side of the rails and a tab that interrupts the led/detector. if there is dust or crud that has settled on it... it can't reference the tracks or alignment properly. Also, look under the 1551 utils and you should find a speed checker. See if the disk is turning at close to the proper speed. Also, clean with alcohol the hub that the floppy sits on and the bottom edge of the plastic spindle, above. See if the splindle rotatates freely and lube where it passes through the top metal bracket. Finally, check the tension on the read/write head tension spring (at the rear of the head arm assy) you may have to bend it a bit to increase the head pressure on the floppy.
Good luck...
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