sigh.. found a series of posts in comp.sys.perq and Tony and RD Davis (RIP)
were discussing this twenty years ago :-(
where did you find the information about the guard band pattern at the ends?
On 10/9/16 10:29 AM, shad wrote:
> Then try to insert some small pieces of paper over one limit (
> -Original Message-
> From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of shad
> Sent: 09 October 2016 18:30
> To: cctalk
> Subject: RE: Blown Tantalum Capacitor Advice
>
> Hello Rob,
> I'm quite sure that the tantalum explosion has n
Hello Rob,
I'm quite sure that the tantalum explosion has nothing to do with the
spin-up failure.
Indeed the RD53 (Micropolis) is infamous for a problem in the head
positioning shock absorber.
The head positioning system is based on a voicecoil inserted in the
magnetic field; the angle covered by t
And stuck Maxtor coaxial spindle motors (RK54) are no joy either.
On 10/8/16 11:27 AM, Al Kossow wrote:
>
>
> On 10/8/16 11:07 AM, Rob Jarratt wrote:
>
>> I went ahead and replaced it. The drive spins up now, but sadly the drive
>> doesn't actually work, after spinning up and making a few clun
On 10/8/16 11:07 AM, Rob Jarratt wrote:
> I went ahead and replaced it. The drive spins up now, but sadly the drive
> doesn't actually work, after spinning up and making a few clunking noises,
> it spins down again. I suspect it is trying, and failing, to find track 0.
>
EXTREMELY common probl
On 08/10/2016 19:07, "Rob Jarratt" wrote:
>> A WELL-KNOWN problem with Tantalum caps is that if run in equipment for
>> some time, then put on the shelf for some years, then powered up again,
>> the caps will fail, often spectacularly. Sometimes, in things like memory
>> boards, you will have to
> A WELL-KNOWN problem with Tantalum caps is that if run in equipment for
> some time, then put on the shelf for some years, then powered up again,
> the caps will fail, often spectacularly. Sometimes, in things like memory
> boards, you will have to replace many caps. Likely, just the cap is bad,
On 10/08/2016 05:18 AM, Rob Jarratt wrote:
I have an RD53 disk drive. When I plugged it in the other day something blew
up, smoke etc. I found that it was a tantalum capacitor on the motor control
board that had gone. I suppose I am wondering if just replacing it is a good
idea, could the failure
On 08/10/2016 11:18, "Rob Jarratt" wrote:
> I have an RD53 disk drive. When I plugged it in the other day something blew
> up, smoke etc. I found that it was a tantalum capacitor on the motor control
> board that had gone. I suppose I am wondering if just replacing it is a good
> idea, could the
