Re: 1526 printer - repair(able) or not?

From: William Levak <wlevak_at_SDF.ORG>
Date: Tue, 15 Apr 2014 20:39:20 +0000 (UTC)
Message-ID: <Pine.NEB.4.64.1404152023270.10319@faeroes.freeshell.org>
On Sat, 12 Apr 2014, Rhialto wrote:

I have a 8023P printer.  It says "commodore tractor printer 8023P" on the 
front and back labels".

It is actually a Brother 82W mechanism.

I have the service manual which I got from www.agtannenbaum.com.

> To ease my life, I pulled another printer from the shelves, a MPP-1361.
> That is a 132-column, IEEE-488 printer. Since I heard something loose
> inside, I opened it up before applying power.
>
> The board inside was mounted vertically in the rear, but otherwise
> seemed quite similar to the MPS-802: the big chips were (nearly) the
> same, in the same arrangement! From left to right there were also a ROM,
> 6502, VIA, RIOT, RIOT.  Maybe the supporting stuff around it differed
> a bit but I didn't have them open at the same time for a detailed
> comparison.
>
> When I turned it on, it worked (mostly). Often it gets stuck when
> moving horizontally.

The bar probably needs cleaning.  Wipe it off with a soft cloth and 
lubricate with turbine oil #90 (NISEKI FBK-32)

> When turning it on with the left button pressed ("form top"), it
>
> printed
> <wide>  *** CBM ***  :</wide> COMMODORE 8023P MODEL PRINTER :   ROM P/N
> #325320-02
>
> The ribbon wasn't as dried as one might expect after being years on the
> shelf...
>
> The test pattern had the pound sign instead of a backslash though...
> strange for a PET printer.
>
> I haven't gotten it to print from a PET though. If I turn the printer
> off, a PRINT# properly reports ?DEVICE NOT PRESENT, but when it is on it
> just pretends it works but nothing prints.

You must use the secondary address when opening the file.

   Secondary address 0 means print exactly as received.
                     4 enable diagnostic messages.
                     9 disable diagnostic messages.
                    10 reset printer.



wlevak@sdf.lonestar.org
SDF Public Access UNIX System - http://sdf.lonestar.org

       Message was sent through the cbm-hackers mailing list
Received on 2014-04-15 21:01:31

Archive generated by hypermail 2.2.0.