19 Mar
2010
19 Mar
'10
8:45 p.m.
-----Oorspronkelijk bericht-----
Van: cctalk-bounces at classiccmp.org
[mailto:cctalk-bounces at classiccmp.org] Namens Tony Duell
Verzonden: vrijdag 19 maart 2010 20:06
Aan: cctalk at classiccmp.org
Onderwerp: Re: HP 2671 Graphics ROM
Thanks , HP was talking about adding a graphics chip (ROM).
The 2671 has an empty socket on the HP-IB interface board, the one closest
to the printer PCB is empty.
I'm not sure if that's the one, it could be the ROM on the printer PCB it
self.
It would be very nice if you find out what needs to be replaced, on the
printer PCB on the one I have a 8039 with external ROM is used.
I've a stach of 216mm wide fax paper from a fax I owned .
-Rik
I aquired a HP 2671A thermal printer and know that there
should be
an upgrade ROM to 'upgrade' it to a HP
2671G.
Thanks to Tony excelent work on HPCC CDROM i have the
schematics and
was able to fix the head positioning circuit.
One of the driver transistors (TIP 122) was bad after
replacing it and
cleaning the printer it works fine.
You will find it prints on thermal fax paper without
problems. But get the 216mm wide stuff. I got some 210mm
rolls and found it would print on them without snagging the
papepr if oyu got it positioned just right. I turned a cuuple
of brass spacers, but it's a lot less work to get the right
width paper.
But now I want to use it for printing graphics
(diagrams)
and would be
very happy whith an image of the graphics ROM.
If you like I can pull the cover on my 2671G and see what the
3 programmed devices (2 8049 microcontrollers and a ROM) are
labelled, and the setting fo the EA pin switches on each of
the boards (to see if the
8049 is using its intenal ROM). That will indicate what needs
to be replaced in your machine....
-tony