Hypertherm Powermax1000 Service Manual - Manual (Page 55)

MAINTENANCE
3-22
powermax1000
Service Manual
1
80 Test 4 – pilot arc IGBT (Q8)
• Check the resistance of the gate drive circuit (R108, R110).
• If the values are not ±15% of the values shown below, replace the power board (PCB2) and the pilot arc
IGBT (Q8).
• If the values are correct, check the pilot arc IGBT (Q8) with an IGBT Tester. If it fails, replace the power
board (PCB2) and the pilot arc IGBT (Q8).
Pilot arc IGBT
(Q8)
Gate drive resistors
R108 = 1k Ω
R110 = 10k Ω