Re: 8250LP - Both drives read/write, cannot format

 

I've re-capped 8-10 of the mechanisms (Matsushita JU-570) and while
they've all showed sign of leakage, none were as bad as needing to
repair the tracks. Disassembly and reassembly looks more daunting than
it is, but it's really not so bad. There's no alignment issues, just
take the screws out carefully, and in the right order, and handle it
gently. IIRC, the cable is soldered direct to the motor PC, so it make
it much easier to remove this to work on the board. A couple of years
ago I did record a video of me doing it, but never got round to editing
and uploading it. If there's the interest, I'll finish it off and upload
it to youtube. 

Rob 

On 21/08/2017 13:50, Julian Perry wrote: 

> Thanks Rob: good to know my recollection is correct, even though it ALSO seems to recall that it's a bit of a bugger to work on. I'll see how I go sourcing the components first before I consider taking you up on your kind offer. Lt's just hope the traces are not damaged.
> 
> Julian 
> 
> Confirmed, it's come up on this list a couple of times and has affected 100% of the drives I have opened in my 8250LP's and SFD 1001's. 
> 
> Finding the right parts is a little more complicated than usual as you need low profile components that stand more than 7-8mm above the drive controller board. I have a few baggies made up with the right replacements if you need them. 
> 
> Rob
> 
> On 21 August 2017 10:23:03 CEST, Julian Perry <jp@digitaltapestries.com> wrote:
> Just a sanity check.
> I've an 8250LP drive that I know was working well when I stored it. 4 years ago.
> cracked it out today to check it out, as one does. :)
> It happily reads and writes on a preformatted 8250 disk but will not format on either drive (error23 track 1/17) 
> Can I assume it's a spindle speed error? Seems odd that it's affecting both drives.
> 
> There's a little bell ringing in the back of my head telling me there's a leaky capacitor problem on the motor controller board of these drives. Can anyone confirm this?
> 
> Thanks.
> 
> Julian
> 
> -- 
> Sent from my Android device with K-9 Mail. Please excuse my brevity. 
> 
> -- 
> Best regards,
> Julian mailto:jp@digitaltapestries.com 
> 
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