Re: [midatlanticretro] DEC PDP 11 and DSD 880
- On 10/05/2012 12:30 AM, Aliaga, Daniel G wrote:
> So, after some debugging tonight, I am pretty sure:Have you checked for a shipping lock?
> 1. The fixed drive does not spin on powerup or ever.
> 2. I think it waits to see if it spins, then gives a seek timeout
> error, and tries to boot from floppy. The seller did not know the status
> of the floppy drive, nor do I.
> 3. In the back of the DSD 800 there is a fuse for the WinchesterAhh ok, so no spindle lock at least. Check for a shipping lock on the
> Drive. Fuse measures out to be ok but if I pull the fuse, I get the same
> symptoms. So this means either no power is going to the motor or the
> motor is not blown. I can turn the motor by hand.
head carriage. BUT...be very careful rotating the spindle by hand! In
some drive designs, turning it backward can cause the head to dig into
> I guess next step is figure out power lines to fixed drive and measureI think you're going to end up needing to disassemble it anyway.
> for live voltage? Somewhat dangerous because its suck way in there and
> lots of dissemble needed.
Dave McGuire, AK4HZ
New Kensington, PA