Hypertherm Powermax30 XP Service Manual - Manual (Page 113)

Powermax30 XP Service Manual 808150 Revision 1 113
6 – Power Supply Component Replacement
Install the power board
Before beginning this procedure, verify you have the correct power board for your system.
 The replacement kit number for a CSA power board is 428233.
 The replacement kit number for a CE/CCC power board is 428234.
1. Being careful not to scratch the heatsink, use a clean cloth with isopropyl alcohol to remove any residual thermal
grease.
2. Apply a 0.051 mm (0.002 inch) layer of thermal grease, about the thickness of a sheet of paper, on all the IGBTs and
the input diode bridges.
3. Apply thermal grease to the bottom of the snubber resistor as follows.
a. Avoid getting any thermal grease on the prongs of the snubber resistor.
b. Start from the end closest to the power board and drag away from the prongs.
c. Spread an even layer of thermal grease 0.051 mm (0.002 inch) thick on the bottom of the snubber resistor. (See
Figure 51.)
Figure 51
1
2
2
3
1 Snubber resistor
2 Thermal grease
3 Capacitors