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power supply 5volt vsb

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by hal5525

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where do I ck for the + 5 vsb on an atx pwr suppy?I have removed the pwr supply and am checking on the bench.
thanks for help

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by thechas

Here is a link to the ATX power supply connector pin-out.

http://www.hardwarebook.net/connector/power/atxpower.html

The main 5 volt lines are normally red.

The 5 volt standby power is purple.

There are a couple of articles in the TR archives on testing power supplies.

While I have not checked this myself for the 5 volt standby line, for the normal 5 volt power, the 5 and 12 volt lines MUST have a minimum load attached for the power supply to start up and operate.

With a little bit of looking, you can find ATX power supply test boxes for under $10 (US).

One source is www.geeks.com

CAUTION:
Unless you are a trained technician, do not open the power supply case. Lethal voltages are present on many parts in any PC power supply.

Chas

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