Hypertherm Powermax105 Service Manual - Manual (Page 243)

Power SuPPly ComPonent rePlaCement
powermax
105 Service Manual 9-45
Replace the input diode bridge
Complete the instructions below while referring to the applicable figure:
• 200-600 V CSA heat sink components on page 9-50
• 230-400 V CE, 380 V CCC/230-400 V CE heat sink components on page 9-51
• 380 V CCC/400 V CE heat sink components on page 9-52
1. Remove the two mounting screws from the input diode bridge.
2. Remove the input diode bridge from the heat sink.
3. Clean the area where the input diode bridge was mounted, using isopropyl alcohol to remove the old thermal grease
from the heat sink.
4. Apply a thin coat (3 mils, approximately the thickness of a sheet of paper) of thermal grease evenly to the input
diode bridge mounting surface.
5. Orient the input diode bridge correctly and mount it to the heat sink by gently tightening the two supplied screws.
6. Alternately step torque the two mounting screws to the proper torque value as shown in the applicable figure.
Replace the output diode bridge
Complete the instructions below while referring to the applicable figure:
• 200-600 V CSA heat sink components on page 9-50
• 230-400 V CE, 380 V CCC/230-400 V CE heat sink components on page 9-51
• 380 V CCC/400 V CE heat sink components on page 9-52
1. Remove the four mounting screws from the output diode bridge.
2. Remove the output diode bridge from the heat sink.
3. Clean the area where the output diode bridge was mounted, using isopropyl alcohol to remove the old thermal
grease from the heat sink.
4. Apply a thin coat (3 mils, approximately the thickness of a sheet of paper) of thermal grease evenly to the output
diode bridge mounting surface.
5. Orient the output diode bridge correctly and mount it to the heat sink by gently tightening the four supplied screws.
6. Alternately step torque the four mounting screws to the proper torque value as shown in the applicable figure.