Elektronika MK-61 operation?

[Cristian Arezzini]

Tom, I myself found the info I another thread of this forum:
http://www.hpmuseum.org/forum/thread-2345.html
The values are also in the schematic that comes with the calculator. One particular calculator I fixed had a dim display AND a malfunctioning EEPROM. I checked the caps, and one of them was the wrong value and dated 1969. Obviously a previous "fix" using surplus components. Now the display is much better and the EEPROM works. After changing the caps, be sure to regulate the voltages using the trimmers, since the new caps could produce much higher voltages than needed...