I am the happy owner of the TSL60 JCM2000 amplifier. I am an electronics engineer. For me, the regulation process is very simple, only the correct value is important. I would like to check if the BIAS value is correct after several years of use. I also wanted to know this value in case of changing lamps for new ones. In this amplifier, only one potentiometer is used for adjustment. There are three control pins. Pins 1 and 3 give the same values. Pins 1 and 3 are shorted? What should be the correct voltage value between pins 1 and 2 as well as 2 and 3? 40mV or 80 mV?