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TroubleshooTing and sysTem TesTs

5-20 powermax

Service Manual

Note: To test the values at pin 16, you must have the torch and power supply positioned such that you can safely pull

and release the torch’s trigger.

Test 3 – VBUS and voltage balance

Test the power board to ensure that the circuits are balanced. There are three procedures below. Use the ﬁrst

procedure if you have a 200–240V CSA power supply or a 230V CE power supply. Use the second procedure if you

have a 400VCE power supply. Use the third procedure if you have a 480V CSA power supply.

For this test, you can use the test point loops or you can test on the capacitor screws. The test points are labeled on the

back of the power board, as are the voltages and positive and negative capacitor terminals.

CAUTION

To test using the test points, do not use a multimeter with test probes. Use E-Z Hook leads instead

and attach them to the test point loops.

J7 (200–240V CSA / 230V CE)

J8 (400 V CE / 480V CSA)

Ground to the ground wire clip or to the heat sink

TP 19

TP 18

TP 17

192 VDC

Hypertherm powermax45 Service Manual

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