Re: Two 1541-II drives with problems

On 07/09/2014 07:04 PM, Ville Laustela wrote:
>
> Hello.
>
> I had a brief return to this project. I bought a working 1541-II board from eBay, just for a reference. I am still getting exactly the same symptoms (no stepper movement, drive halts), same thing with both drive mechanisms.
>
> As I have no reason to blame this board having the same fault, I am now almost positive that I must have two faulty drive mechanisms (and the boards that I have, could have been working all along). I am afraid that earlier while fiddling with these drives, I must have connected the drive cables wrong way around. As said on the Ray Carlson's site: "If accidently reversed, you can do serious damage to the drive board or mechanism".
>
> I see at least two 1541-II mechanisms on eBay, although of different manufactorer. Are the drive mechs interchangable?

Yes, at least I was able to switch between a Chinon and a Mitsumi drive 
without problems on one of my 1541-II here. The front bezels differ 
between them though, so these need to be moved with the mechanism.

And here's a hint about how to avoid switching the connectors: Before 
disassembling something, I mark every connector with a permanent marker 
where the mark connects both parts of the connector. Make sure the mark 
is in a different position on each connector and it's very easy to alway 
put things together the right way.

No stepper movement could be U8, U10 or U13.

  Gerrit



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