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Testing a 20-pin power supply

wayout2day

wayout2day

Limp Gawd
Joined
Oct 15, 2006
Messages
170
I am testing a power supply and mobo for failure. I purchased a power supply tester:

Rexus PST-3 so that I could use the LCD: http://www.rexususa.com/PSU/11903.html

The instructions (same as on website) state that there is a P6 connector that needs to be used along with the 20 pin However, the power supply only has the 20-pin lead.



I pulled the power supply from the machine: Ever Model no: FSP145-61GW.

1. I plugged it in and there was no fan or LCD read.

2. I plugged the P1 into the motherboard and used the button on the front of the PC -- the light on the mobo came on as well as the fan in the power supply. I also plugged the Molex connectors into the tester--the light for +12v and +5v came on the tester.

Any suggestions--Can I use this tester to test this power supply further or do I need to use a multimeter or another kind of power supply tester ??
 
I think by P6 they mean the AUX 12 V 4-pin connector that connects to the MB in addition to the 20 pin. It supplies extra 12V to the CPU.:D
 
all you need to do to test the supply with that tester (I have them myself) is to plug the 20 pin connector into the tester.

Plug in any others you want to test the voltage on, I would recommend the p4 plug (4 pins) at a minimum, but that 145 watt supply your testing probably dont have one. if not, thats ok too.

plug in the power cord to the supply. if the supply works, it will turn on, the tester should beep (1 time I believe), and light up, showing the voltages measured. it will also beep more than 1 time if any are out of spec.

repeat, the only plug needed to be plugged in is the 20 pin, to test the bare basics needed if the p4 plug isn't used on your motherboard
 
I did try plugging it in. The tester is a 24 pin tester that allows for testing of 20 pin. So I plugged it in and it didn't work. The question is, how do I plug it in, rounded up, to the left to the right, with a 20 to 24 pin adapter ?
 
I was successful in getting the tester to work...

The P1 goes in: clip on top, rounded part down, 20-pins starting on the right (with the LCD facing up). The PSU tested out -- no good.

The LCD lit up and then went out...must be loose wire in the PSU, because it worked well on two other PSU's I have...

Hope this helps somebody...
 
most of the testers I have seen will only allow you to plug it in one way, and one position. if you get it plugged in someother way, your either forcing it, or the maker decided to not protect the tester by not properly polarizing the plug.
 
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