HP Forums

Hi,

Does anyone have schematics for the Monroe 620 desktop calculator from the early seventies, or know where I may find these?
I am also interested in schematics for the Canon L121 which is an almost identical calculator.

Thank you very much!

Kees.

Wanna look here? For the Canola L121
https://www.oldcalculatormuseum.com/canonl121.html

Maybe he has the service manual (as he gives details from it)?
Would be interesting for me as welll as I also have a (working) Monroe 620.

Another site is Hilpert's in Canada:
madrona.ca/e/eec/calcs/Monroe610.html
same unit without the memory.

It has a schematic very similar to Andi's suggesttion, but arranged a bit differently.