People expert from here, please.
Can you please tell me if the pin 4 is relative to PR133?
And one more question.
Can somebody tell me if I have to remove the resistor before solder the trimpot to the ground?
I think if the answer is "yes", the steps is:
1- remove PR133
2- solder trimpot 100K (ground to right side of resistor), and card just modded, so I can change voltages by trimpot.
Thanks to all