Plasma Power Supply
36 809970 Field Service Bulletin XPR300
Install the control-side fans
1. Put the new control-side fan on the 
bracket so that the flow of air goes 
into the plasma power supply and the 
wires are as shown.
There is an arrow on the fan 
housing. The arrow must point 
to the inside of the plasma 
power supply.
2. Use the 2 screws to install the fan 
onto the bracket.
3. Align the bracket assembly with the 
studs in the front sheet metal panel 
and the slots in the center panel.
4. Use a 10 mm, hexagonal-socket 
wrench to install the 2 nuts.
5. Route the fan wires through the center 
panel of the plasma power supply.
6. Connect the control-side fans to the 
fan power distribution PCB:
 J7 for the top fan
 J8 for the bottom fan
7. Install the side panels.