Elektronika MK-61 dead digit :(

[Druzyek]

(08-15-2018 01:13 PM)Hlib Wrote:  

(08-13-2018 09:25 PM)Druzyek Wrote:  ...Is there a way to be sure that that chip is malfunctioning without changing the display?

Cut off the faulty segment and try to signal it from a working circuit to make sure finally.

Do you have a pinout or datasheet for it? I know it is old. I would like to know how to drive it myself if I don't use this extra display in the calculator. I can use a datasheet in Russian or English.