Hypertherm Powermax30 XP Service Manual - Manual (Page 126)

126 Powermax30 XP Service Manual 808150 Revision 1
6 – Power Supply Component Replacement
Remove and install the ground wire from the heatsink to the magnetics assembly
1. Complete the following procedures:
a. Set the power switch to OFF (O), disconnect the power cord from the power source, and disconnect the gas
supply.
b. See Remove the power supply cover on page 88.
2. Remove the ground wire’s ring terminal from the screw that attaches it to the heatsink.
3. The ring terminal on the other end of the wire is attached to the metal base plate of the magnetics assembly. (See
Figure 61.) The connection point is just below the bottom right corner of the fan. The wire is routed behind the
pressure switch and down along the left side of the fan housing. Remove the ring terminal from the screw that
attaches it to the metal base plate.
4. Tighten the new ground wire’s ring terminal to the heatsink to a torque setting of 23.0 kg-cm (20 inch-pounds).
 Be sure to reattach the ring terminals for the other two ground wires that connect to the
heatsink using the same screw.
5. Route the new ground wire through the notch in the center panel above the pressure switch, behind the pressure
switch, along the left side of the fan, and then along the metal base plate of the magnetics assembly to the screw
below the bottom right corner of the fan. (See
Figure 61.)
6. Use the screw to attach the ring terminal for the new wire to the metal base plate of the magnetics assembly with a
torque setting of 17.3 kg-cm (15 inch-pounds).
7. Complete the following procedures:
a. See Install the power supply cover on page 89.
b. Reconnect the gas supply and power cord, and set the power switch to ON (I).