A strange behaviour when my classic calculator is connected to a wall adapter

[Paul Berger (Canada)]

Since you have one of the version that is switchable and I am guessing it is a later version that does not have screws that fasten the circuit board onto the bottom, however I believe that the holes in the board and the bottom of the shell are still there, even if the screws where not present. having the board fastened to the bottom makes it a lot easier to measure things inside the charger. I would wonder what the voltage is across the capacitor, also note these transformers are not capable of providing a lot of current so if the capacitor fails short it will drag the whole thing down.

Paul.