Re: 1541-II mechanisms

From: Gerrit Heitsch <>
Date: Tue, 16 Sep 2014 19:43:54 +0200
Message-ID: <>
On 09/16/2014 06:42 PM, Ethan Dicks wrote:
> On Tue, Sep 16, 2014 at 11:09 AM, Gerrit Heitsch
> <> wrote:
>> On the other hands, the Newtronics drives were known for their dying R/W
>> heads. I have more than one 1541C with a Newtronics drive that is perfectly
>> OK, just the R/W head has a broken connection somewhere.
> I have a Newtronics drive with a dead head, or that's how it
> superficially tests (it displays symptoms consistent with that fault).

You can easily check it. Measure the resistance between all 4 leads from 
the head. They all need to be in the 2 digit Ohm range. If any of them 
is different (usually infinite = open), the R/W head is dead.

> Is there anything to do to the mech?  Since there aren't stacks of R/W
> heads lying about, presumably one just replaces the entire drive
> assembly (or sticks on the shelf as spares for another unit).

Along those lines, yes. Even if you had a spare head, you'd have to 
align it after replacing it, otherwise it will only read it's own disks.

I consider a dead R/W head final and use the whole drive for spare parts.


       Message was sent through the cbm-hackers mailing list
Received on 2014-09-16 18:00:03

Archive generated by hypermail 2.2.0.