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APF Mark 210 found on the side of the street (lemm.ee)

submitted 1 week ago* (last edited 1 week ago) by [email protected] to c/[email protected]

6 comments fedilink hide all child comments

Does anyone happen to know where to find the manual or additional info on this calculator? I found very little info on this site, but that was it (http://www.calcuseum.com/SCRAPBOOK/BONUS/15091/1.htm)

The electronics seem to work, but the printer only feeds up to a certain point, where the paper is right below the ribbon. Then it stops feeding even when I press the up button. If something is wrong with the printer, I admit that I don't know where to start with troubleshooting it. The metal parts that push the ribbon against the spinning numbers also don't move at all, but the two plastic wheels spin the ribbon around.

I've tested all configurations of the switches above the keypad, and I can't seem to turn off the printer either. That probably is just a result of me not knowing how to use it though. If anyone has troubleshooting advice or even just ideas on what sources to use for further research, it'd be much appreciated!

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[–] [email protected] 6 points 1 week ago* (last edited 1 week ago) (2 children)

That calculator only has "NP" labeled on the top right switch, but I saw another similar one that had the other setting labeled "P". What is that switch for? It's really funny in the context of computer science.

[–] [email protected] 2 points 1 week ago* (last edited 1 week ago) (1 children)

Probably no print?

Edit: Snippet of another calculator manual

[–] [email protected] 3 points 1 week ago

So no proof of P != NP. Too bad.

[–] [email protected] 1 points 1 week ago

I couldn't tell to be honest. It didn't have a very obvious effect, but I didn't figure out how to use it yet. I think it's my first RPN calculator which complicates things a little bit.

[–] [email protected] 2 points 1 week ago

I tried for a while using my usual sources for various manuals, but came up empty. You may need to try to find some kind of Japanese source for this manual it seems. Also, given that this post is in the top results for that model of adding machine, I wouldn't hold my breath.

[–] [email protected] 2 points 1 week ago

What a sweet find!

Is it possible that it was left out in part because the feed mechanism is broken? Or that, being out in the elements did some damage?

I can't help with the manual, but I think you're on the right track with eliminating user error first. From your description, it sounds as if there's an obstruction below the ribbon, or more likely that it's jammed and the system knows enough to not try to force the paper and is disengaging the feed. Can you manually move the print ribbon arms?