Install the power board – Hypertherm Powermax125 Service Manua User Manual
Page 206
206
Powermax125 Service Manual 808070
9 – Power Supply Component Replacement
7. Remove the 7 board mounting screws. Do not remove the 2 transformer mounting screws.
8. Pull the right-hand edge of the power board forward, while pushing the gate drive wires through the openings in the
board.
Silkscreen printing above the openings in the board denotes the color and order of the
gate drive wires. The printing from left to right is “BLK” (black), “RED” (red), “BLK” (black),
“RED” (red).
9. Unplug the J11 and J17 wire connectors from the left side of the power board. Gently move the J17 connector
side-to-side to work it free from the power board.
10. Unplug the J18 and J32 wire connectors from the left side of the power board.
11. Remove the power board from the power supply.
Install the power board
Complete the instructions below while referring to the applicable figure:
Figure 74 – 480 V / 600 V CSA power board on page 207
Figure 75 – 400 V CE / 380 V CCC power board on page 208
1. Place the power board in the mounting position while routing the gate drive wires through the respective openings in
the board.
Verify that all the wires that were disconnected while removing the power board are now
positioned in front of the power board.
2. Tighten the 7 board mounting screws to 17.3 kg-cm (15 inch-pounds).
3. Plug the gate drive wires into the respective connectors on the power board (J22 and J21).
Silkscreen printing above the openings in the board denotes the color and order of the
gate drive wires. The printing from left to right is “BLK” (black), “RED” (red), “BLK” (black),
“RED” (red).
4. Plug the respective wire connectors into the J1, J2, J3, J5, and J6 connectors on the back of the power board.
5. Plug the J11 and J17 wire connectors into the respective connectors on the left side of the power board.
6. Plug the J18 and J32 wire connectors into the respective connectors on the left side of the power board.
7. Secure the respective wires to the power board at J25, J26, and J27 by tightening the bolts to 63.4 kg-cm
(55 inch-pounds).
8. Install and tighten to 40.3 kg-cm (35 inch-pounds) the screws that are shaded gray in Figure 74 on page 207 and
Attach the previously removed wires to the power board.
Attach the two 4 μF capacitors onto the board below the gate drive wires.