Mains input power (100V to 240V) to the machine is routed to the mains isolator
switch at the front of the machine. From the mains isolator it is fed to the M37
power supply crate, through the cable gland at the rear panel, to the three
terminal blocks TB1 (live), TB2 (neutral) and TB3 (earth). From the terminal
blocks mains power is supplied to the following: