I see a ground sumbol in the schematic, if you have connected this point to ground remove it because you dont know whats inside the machine.
Also, because this output was suppossed to power a fluorescent lamp, initially creates a high voltage to start the lamp ans then it reduces the voltage.
Try it again with a 50K resistor.
Also, because this output was suppossed to power a fluorescent lamp, initially creates a high voltage to start the lamp ans then it reduces the voltage.
Try it again with a 50K resistor.