Powermax30 XP Service Manual 808150 Revision 0 77
5 – Troubleshooting and System Tests
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 11 on page 71.)
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
16 Start signal 3.2 VDC closed
0 VDC open
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