hp46 with strange modification

[Roland57]

(06-29-2022 06:18 AM)Thomas Klemm Wrote:  

(06-28-2022 11:43 PM)teenix Wrote:  KORR might be Keyboard OveRRide.

From the back label STAATLICHE INGENIEURSCHULE AALEN LANDESEIGENTUM I assume that could be an abbreviation for KORREKTUR (correction).

Yes, KORR may be short for German "Korrektur".
I contacted Hochschule Aalen, but there is no further information available.

In the web I found a German Company "Epis GmbH", specialized (among others) on industrial electronics. Maybe this is the manufacturer.

Meanwhile I removed the modification and repaired a few changes they made on the keyboard PCB. Now the hp46 is in its original state and working fine.

If someone has spare SIN and COS keys I would be happy to get them to remove the last signs of this modification :-)

And a final question: why has the hp46 a red/black printer ribbon ? I could not find any hint how to let it print in red !

Roland