Hypertherm Powermax65 Mode D'emploi page 10

Powermax65/85 Power board rePlacement
Replace the power board
Please refer to Figure 2 on the next page when performing the following procedure.
Remove the power board
1. Unplug the five wire connectors located at the J1, J2, J3, J4, and J5 headers on the heatsink side of the power
board.
2. Disconnect the three gate drive wire connectors (J17, J18, and J19) from the power board.
3. Disconnect the PFC temperature sensor connector (J16) from the power board.
4. Remove the 3uF capacitor on the left and the longer transformer wire using a #3 Phillips screwdriver (Powermax85)
to remove the three inverter IGBT screws. Use a #2 Phillips screwdriver to remove the screws on the Powermax65.
5. Disconnect the remaining transformer wire using a #2 Phillips screwdriver to remove the screw at J29.
6. Disconnect the work lead wire using a #3 Phillips screwdriver to remove the screw at J26.
7. Remove the 3uF capacitor on the right and the two PFC inductor wires below it using a #3 Phillips screwdriver to
remove the three PFC IGBT screws and the screw securing the shorter PFC inductor wire.
8. Disconnect the snubber resistor wires using a #2 Phillips screwdriver to remove the screw at J13 and the two input
bridge screws.
9. Remove the six snubber resistor screws and four capacitor screws using a #2 Phillips screwdriver.
10. Disconnect the output inductor wire by removing the upper left diode screw with a #2 Phillips screwdriver.
11. Remove the three remaining diode screws.
12. Disconnect the nozzle wire (black) using a #2 Phillips screwdriver to remove the pilot arc IGBT screw on the left.
13. Remove the remaining pilot arc IGBT screw.
14. Disconnect the electrode wire (red) using a #2 Phillips screwdriver to remove the screw at J28.
15. Remove the three heat sink mounting screws using a #2 Phillips screwdriver.
Note: It may be necessary to pull the top of the front panel slightly forward to remove the upper left heat
sink mounting screw from the power board.
16. Remove the four board mounting screws using a #2 Phillips screwdriver.
17. Pull right hand edge of power board forward, while pushing the gate drive wires through the two openings in the
board, until components on back side of board will clear the rear panel.
Note: There is silkscreen print above the openings in the board, denoting the color and orientation of
the gate drive wires, if they are accidently disconnected from the IGBT while removing the board.
18. Slide the board to the right until the wire connectors on the left edge of the board are accessible, approximately 2
inches (5.1 cm).
19. Unplug the wire connectors from the J12 and J20 power board connectors.
20. If the power supply has a CNC interface installed, unplug the wire connectors from the J21 and J32 power board
connectors.
21. Remove the power board from the power supply and set aside.
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(200-600V CSA)
Field Service Bulletin