Re: 8280 Jumper Settings

From: Mike Stein <*mhs.stein_at_gmail.com*> Date: Fri, 11 Jan 2019 15:20:35 -0500 Message-ID: <1F5D44F841524F4E92C2D9E81F99837B@310e2> · mhs.stein_at_gmail.com

Good tips for when I look at mine, thanks; good thing there aren't very many electrolytics, mostly only two values, and no tantalums that I can see ;-)

Lots of jumper wires on some of mine; no idea what they do.

BTW, where are you? I'm in Toronto now, originally from Hamburg.

----- Original Message ----- 
From: "vossi" <vossi@ceffy.de>
To: <cbm-hackers@musoftware.de>
Sent: Friday, January 11, 2019 1:35 PM
Subject: Re: 8280 Jumper Settings

>I had one drive with a faulty 7474, but all other drives have bad caps!!!
> 
> Especially the cap for the time slot of two index pulses-window had two low
> capacity. So the window was too small for two pulses and the right speed was
> not recognized. This is the reason because the second LED does not light and
> the stepper does not start to move...
> 
> Replace all electrolytic caps!
> 
> Christian 
> 
> 
> 
> -----
> greets
> Christian
> --
> Sent from: http://cbm-hackers.2304266.n4.nabble.com/
>