Elektronika MK-61 (Электро́ника МК-61) calculator switch repair
My MK-61 Elektronika calculator began to suffer from an intermittent power switch. I found a set of exact replacement switches and replaced the power switch. It wasn't a difficult process with the right tools, and I've done this sort of thing many times with ham radio equipment.
I wanted to document the process here in case any MK-61 owners have this problem.
MK-61 with broken switch and replacement switch PD-9-2
Remove a screw and remove the back cover
Push back the tabs and lift the board
With the main board lifted, you can carefully lift the clock module
The faulty switch is here.
Slide out the charger jack
Verify that the new switch is the correct one
Use solder flux paste to ease removal
Sacrifice the switch to reduce thermal mass; cut ends off and cut them in half as well
After a few minutes, the old switch is freed and we only lost one solder pad, non connected
The new switch looks good on the top.
And good on the bottom.
It works! EGGOG!
WA5ZNU
