Hypertherm powermax1000

MAINTENANCE
1
powermax1000 Service Manual 3-23
Test 5 – inverter IGBT (Q6) and PFC IGBT (Q7)
• Check the resistance of the gate-drive circuit.
• If the values are not ±25% of the values shown below, replace the power board (PCB2) and the appropriate
IGBT.
• If the values are correct, check both IGBTs with an IGBT tester. If one IGBT fails, replace the power board
(PCB2) and the failed IGBT.
80
C100
Inverter IGBT (Q6)
PFC IGBT (Q7)
o o
o o
R65
R82
Inverter
R82 = 994Ω
R83 = 6.1Ω
R65 = 995Ω
R75 = 6.1Ω
R84 = 10.4Ω
R96 = .4Ω
80
C100
PFC
R87 = 994Ω
R56 = 4.1Ω
R98 = 1Ω