Plasma Power Supply
XPR300 Field Service Bulletin 809970 57
Replace the inrush resistor assembly
See Rear compartment of the plasma power supply on page 128 for
location and part number.
1. Complete the following procedures:
a. Remove the power from the cutting system.
b. See Remove the right-side (liquid-cooling-side) panel on page 60.
c. See Remove the rear panel on page 62.
Keep all nuts and screws that you remove.
2. Use tape to attach protective material, such as cardboard, onto the rear of the heat-exchanger
assembly to protect the cooling fins.
3. Use a 10 mm,
hexagonal-socket wrench
to remove the 2 nuts on the
internal sheet metal.
4. Pull in the sheet metal to
access the inrush resistor.
CAUTION
Sharp cooling fins can cause cuts. Use caution when you work near the cooling fins.
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