Test 6 — flyback circuit, Powermax1000 – Hypertherm Powermax1000 Service Manual User Manual
Page 57
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MAINTENANCE
3-24
powermax1000
Service Manual
1
Test 6 – flyback circuit
DC power supply circuit (+5 VDC, +10 VDC, +18 VDC, and +24 VDC)
R20 = 0.75
Ω
Verify that the diodes listed below are not short-circuited by checking their resistance (approximately 2k
Ω).
Note: Check voltage to ground (TP1).
D4 = 24 VDC
R1 = 24 VDC
D5 = 24 VDC
R2 = 18 VDC
D7 = 10 VDC
R9 = -6 VDC
D9 = 18 VDC
R18 = 5 VDC
D17 = 5 VDC
R26 = 18 VDC
R55 = 18 VDC
80
80
TP1
Visually inspect for damage.
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