Hypertherm powermax45 Field Service Bulletin

6 Powermax45/45 XP Field Service Bulletin 807990
Powermax45/45 XP Snubber Resistor Replacement Kit
Figure 5 – Older 400 V CE power board
7. If you have an older 400 V CE power board that has 2 input bridge diodes (and without the small slot below the
heat sink assembly screw hole), remove the 2 screws that attach the IGBTs and the 2 screws that attach the input
bridge diodes to the heat sink. There are holes in the power board to provide access to them.
If you have a newer 400 V CE or 480 V CSA power board that has a single input bridge diode (and has a small slot
below the heat sink assembly screw hole), remove the 2 screws that attach the IGBTs and the screw that attaches
the input bridge diode to the heat sink. There are holes in the power board to provide access to them.
8. Remove the screws at J1, J2, and J3 that secure the 3 white wires from the bottom of the ON/OFF switch to the
power board.
9. Stand up the unit again. Tuck out of the way all the wires that you detached.
10. Pull the board straight out from the power supply and set aside.
Continue with the procedure on the next page.
TP17
W
+
-
+
-
TP18
B
TP16
R
~280 VDC
~280 VDC
Heat sink assembly
screw
Ribbon cable (J8)
J10, J12
J13
J14
J15
J16
J18
J22
Heat sink
assembly screw
J4, J5, J6
Retaining screw
IGBT attachment
screws (2)
ON/OFF
switch wires
Retaining screw
Heat sink assembly
screw
J17
Heat sink assembly
screw
Input bridge diode
screw
J3 J2 J1
J19
J20
Retaining
screw
Work lead
connector (J21)
Snubber resistor screws (4)
Pressure relief
vents
Capacitor
screws (4)
Ferrite

Hypertherm powermax45 Specifications

General

Brand	Hypertherm
Model	powermax45
Category	Welding System
Language	English