I have the above described power supply in my machine. The input board for the power supply is showing the red alarm led on it. I disconnected the power supply from the board jumpered pins 5 & 6 together on the output plug of the input board and it worked (the input board). I get my output voltage to supply the power supply from pins 1 and 2. When ever I plug the power supply back into the board it alarms out. I removed the power supply from the machine to see if it was just a grounding issue somewhere on the machine. The input board still alarms out when the power supply is disconnected from the machine. No fuses are blown. Where should I be checking voltage at? The pins labeled 5+, 24e, 24+, 15+, 15-, and 0v? Positive lead should go on the lead you want to check and negative lead should goto 0v?

Any other places I can test this thing at? I have the block schematic from the manual. Very frustrating.