Hypertherm Powermax1000 Service Manual - Manual (Page 56)

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
R
6 5
R
8 2
Inverter
R82 = 994 Ω
R83 = 6.1
Ω
R65 = 995 Ω
R75 = 6.1 Ω
R84 = 10.4 Ω
R96 = .4 Ω
80
C100
PFC
R87 = 994 Ω
R56 = 4.1
Ω
R98 = 1 Ω