Hypertherm Powermax 125 - Page 151

Powermax125 Service Manual 808070 151
8 – Troubleshooting and System Tests
 If there is a fault and the diode bridge output value is correct:
 Display the service screen (Figure 21) and confirm that the value “VL” is ±15% of AC line voltage.
Figure 21
 If there is a fault and the “VL” value is correct:
 Verify the DSP board by replacing it with a known good board.
 If the DSP board is not the problem, replace the power board.