Powermax45/45 XP Field Service Bulletin 807990 9
Powermax45/45 XP Snubber Resistor Replacement Kit
Reinstall the power board (200–240 V CSA and 230 V CE)
The following procedure applies to 200–240 V CSA and 230 V CE power boards. Please refer to Figure 2 on page 3
and Figure 3 on page 4 when performing this procedure.
1. Before reinstalling the power board, spread a thin layer of thermal compound (included in the parts kit) 2 mm thick
(about the thickness of a sheet of paper) on all the IGBTs and the input bridge diode (or diodes).
Note: Remix the compound if the material separates.
2. Line up the holes for the capacitor screws with the capacitors; the pressure relief vents should be visible from the
two notches in the power board.
3. Push the power board straight in.
4. Replace the 4 heat sink assembly screws and torque them to 23.0 kg cm (20 inch-pounds).
5. Replace the 3 retaining screws and the 4 snubber resistor screws. Torque these screws to 17.3 kg cm
(15 inch-pounds).
6. Reconnect the white wire from the ON/OFF switch to J1 and the black wire to J2. Torque them to 23.0 kg cm
(20 inch-pounds).
7. Replace the 3 screws that attach the IGBTs and the screw that attaches the input bridge diode to the heat sink. The
torque setting for these is 23.0 kg cm (20 inch-pounds). (If you are reinstalling an older 200–240 V CSA or 230 V
CE power board, use the 2 screws to reattach the 2 input bridge diodes to the heat sink.)
8. Replace the 4 capacitor screws. Be sure to reattach the black wire to the left-most screw. Torque these screws to
23.0 kg cm (20 inch-pounds).
9. Reconnect the wires to the transformers and inductors at J13, J14, J15, J16, J17, J18, J19, and J20 and the work
lead ring terminal at J21. Torque them to 23.0 kg cm (20 inch-pounds).
10. Replace the connectors at J10 and J12 and the connectors at J3, J4, J5, and J6.
11. Reconnect the ribbon cable from the control board to the power board at J7.
Proceed to page 11 for further instructions.
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