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Service manual, Aintenance – Hypertherm Powermax900 Service Manual User Manual

Page 46

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3-19

M

AINTENANCE

Service Manual

Voltage Check #2 - Figure 3-12

Voltage at Output of Input Diode Bridge
This DC voltage will approximately equal the line voltage X 1.414 - See table below.

Line Voltage

Output at Bridge

200VAC

≈ 280VDC

208VAC

≈ 290VDC

230VAC

≈ 320VDC

240VAC

≈ 340VDC

400VAC

≈ 560VDC

480VAC

≈ 680VDC

≈ Line Voltage
X 1.414

See Table

14

13

Figure 3-12 Voltage Check #2 - Output of Input Diode Bridge

Voltage Check #3 - Figure 3-13

Voltage Across Power Board Capacitors (taken at Q1 and Q2)
See the table in Figure 3-13 to find the correct voltage readings across the power board
capacitors.

Figure 3-13 Voltage Check #3 - Across Power Board Capacitors

Line Voltage

Voltage across Wires

21&22 and 15&16

200VAC

≈ 280VDC

208VAC

≈ 290VDC

230VAC

≈ 320VDC

240VAC

≈ 340VDC

400VAC

≈ 280VDC

480VAC

≈ 340VDC

Q1

21

22

See Table

Q2

15

16

See Table