From Newsgroup: comp.sys.cbm
genewoods5@cs.com (genewoods5) wrote in news:
20040125013314.22695.00000779@mb-m18.news.cs.com:
Can you tell us what the 1541 II does when you try to load a disk you
know is good.
Red light stays on or file not found ect.
File not found, and 74 DRIVE NOT READY 00 00 from the error channel.
I loaded up on another drive an old alignment tool that I used and ran it
on the 1541 II. The program lets you pick a track to read, and then
displays the actual track read to help in adjusting. I tried to play
with the alignment, but could not help it. And if I moved the head by
hand a bit and rechecked the alignment, the drive wouldn't recognize that
it had moved until after about 20-30 retries, and then it would display
the correct track. But I couldn't get any consistant readings. I
eventually got it to read full tracks 80% of the time without displaying
READ ERROR SENSED, with the other 20% of the time reporting read errors.
But even adjusted at that, I wasn't able to get a directory or even do an initialize. Unplugged the five pin connector and did a continuity check
on the four wires going to the head, and they checked out fine. As well,
the drive behaved differently with the connector unplugged when trying to
read a track... it seemed to try longer between stepping the head half
tracks and then bumping against the track one stopper. Thus I concluded
the head must be the problem.
Has anybody actually ever tried replacing a head, or is it just easier to change the entire mech? Also, does anybody know if there are other
Commodore drive models that used the same mech, or is the 1541 II special
that way?
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