Install The Dsp Board - Hypertherm Powermax 85 Service Manual

15. Secure the 3uF capacitor on the left and the longer transformer wire to the board using the three inverter IGBT
screws. On a Powermax85, use a #3 Phillips screwdriver to tighten the screws to 30 in-lbs (34.6 kg cm). On a
Powermax65, use a #2 Phillips screwdriver to tighten the screws to 20 in-lbs (23.0 kg cm).
16. Connect the remaining transformer wire at J29 using a #2 Phillips screwdriver to tighten the screw to 20 in-lbs
(23.0 kg cm).
17. Secure the 3uF capacitor on the right and the longer PFC inductor wire with the three PFC IGBT screws. Use a
#3 Phillips screwdriver to tighten the screws to 30 in-lbs (34.6 kg cm).
18. Connect the remaining PFC inductor wire using a #3 Phillips screwdriver to tighten the screw to 30 in-lbs
(34.6 kg-cm).
19. Plug the gate drive wires into their respective power board connectors (J16, J17, J18, and J19). Gently pull on each
wire to ensure that they are fully seated.

Install the DSP board

Refer to the figure on the next page.
1. Connect the ribbon cable to the ribbon cable connector (6) on the back of the DSP board (3).
2. Align the two alignment pins (7) with the corresponding holes on the power board.
3. Carefully push the DSP board straight onto the power board. Do not bend the pins (4).
4. Secure the DSP board to the power board using a #2 Phillips screwdriver to tighten the two screws (2) to 10 in-lbs
(11.5 kg cm).
5. If an RS485 communication board is installed on the power supply, connect the DSP connector (1) to the top of the
DSP board.
Caution: Aligning the pins on the back of the DSP board with the corresponding holes on
the power board is critical.
Verify all pins are properly seated after carefully pushing the DSP board straight
onto the power board.
powermax
65/85 Service Manual
COMPONENT REPLACEMENT
6-25