Hypertherm Powermax30 AIR Service Manual - Manual (Page 81)

Powermax30 AIR Service Manual 808850 81
5 – Troubleshooting and System Tests
Table 6
 All values can be ±10%.
CAUTION!
Do not use -VBUS (W) as ground. Doing so could destroy the power supply. Instead ground to either
the ground wire clip on the rear panel or to the heatsink. See Figure 5 on page 73.
J7 pin number to
ground
Test Expected value
19 VACR (rectified AC line voltage) 0.86 V at 120 line voltage
1.87 V at 230 line voltage
21 VBUS (DC bus voltage) 2.28 VDC at 375 VBUS
18 IPFC (input current) < 0.1 VDC
20 IFB (output current) < 0.1 VDC
22 ITF (transfer current) < 0.1 VDC
5 3.3 VDC 3.3 VDC ±10%
7 5 VDC 5 VDC ±10%
12 24 V sense pin 2.2 VDC ±10%
16 Start signal 3.2 VDC closed
0 VDC open