Hypertherm Powermax30 AIR Service Manual - Manual (Page 140)

140 Powermax30 AIR Service Manual 808850
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), and disconnect the power cord from the power source.
b. See Remove the power supply cover on page 98.
c. See Remove the component barrier on page 100.
2. From the power board side, remove the ground wire’s ring terminal from the screw that attaches it to the heatsink .
See Figure 58.
3. From the fan side, remove the ring terminal on the other end of the ground wire from the screw that attaches it to the
metal base plate of the magnetics assembly . The wire runs through the grommet in the center panel.
4. Tighten the new ground wire’s ring terminal to the heatsink. Tighten the screw to 23.0 kg∙cm (20 inch∙pounds).
5. Route the new ground wire through the grommet in the center panel. See Figure 58.
6. Use the screw to attach the ring terminal for the new wire to the metal base plate of the magnetics assembly. Tighten
the screw to 17.3 kg∙cm (15 inch∙pounds).
7. Complete the following procedures:
a. See Install the component barrier on page 101.
b. See Install the power supply cover on page 99.
c. Reconnect the power cord, and set the power switch to ON (I).
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