Re: shugart 390 PCB schematic

From: Francesco Messineo <*francesco.messineo_at_gmail.com*> Date: Sat, 8 Dec 2018 22:57:53 +0100 Message-ID: <CAESs-_zmL9gP9ZCpvVHNhH_SLK6vPJanKyt8PdFWX1EZGAaQ5Q@mail.gmail.com> · francesco.messineo_at_gmail.com

Nevermind, it's the same as the Shugart SA-400. And looks like I need
a new LM2917N :/
On Sat, Dec 8, 2018 at 8:11 PM Francesco Messineo
<francesco.messineo@gmail.com> wrote:
>
> Hi all,
> one of the drives (0) in my CBM 3040 dual drive suddendly quit working.
> Symptoms is always read error 20 (on 18,0). I've quickly checked head
> coils and they're ok,
> then switched the drive 0 connectors to drive 1 position in the analog
> board and the symptom
> followed the drive, so the analog board is ok.
> I removed drive 0 and it's spindle speed is obviously very wrong
> (looks too fast) and I can't get it right with the multiturn pot in
> the small PCB on the rear of the drive.
> Now, does anyone know where to find the schematic of that little
> board? It would speed up the troubleshooting process.
> Thanks in advance
> Frank