Re: Profile drives care and feeding

["Peter Ibbotson" <spambox@ibbotson.demon.co.uk>]

"Patrick Schaefer" <PSchaefer@epost.de> wrote in message
3F5F1974.A6B765CF@epost.de">news:3F5F1974.A6B765CF@epost.de...
> Peter Ibbotson schrieb:
> >
> > Is there a website with instructions on care and feeding of a profile
drive?
> > I've just acquired one (Thanks Paul) and before I plug it in I'd like to
> > check the PSU out in case of dried out capacitors etc.
>
> Check the voltages at the PSU connector, there should be +5V, +12V and
> -12V. You have to leave the logic board connected or provide a similar
> dummy load to ensure proper startup of the switching regulator.
>
> One of my drives had a dried capacitor on the 12V line which prevented
> proper regulation - the voltage rose up to 20V. This killed a few ICs on
> the drive's analog board, nasty to find without a schematic or
> functional description of the amplifier.
>
> After power-up, the HD stepper motor should move to track 0, then the
> drive starts its surface scan (Power LED flashing). Any "irregular" move
> during this phase indicates a bad block, which is replaced by a spare
> sector. There are 32 spares available.
>
> Don't expect any performance from the Profile. This thing is just a
> collector's item.


What, you mean it doesn't give UltraDMA performance :) Somehow I'd guessed
that, however I keep on thinking about making a webserver with it and an
apple //e just to show that 1984 micro technology could do it. My only worry
is that the power supplies might catch fire if left unattended. I suppose I
could replace them with an AT power supply, but that kinda defeats the
purpose.

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