Diagram for antec tpq 1200 power supply want to convert it to a bench power supply.

Unfortunately, there are not many parts available off the shelf to repair these. It would be simpler to get a power supply with a greater wattage rating than the one you have now.

I give up! Why would you need a schematic for a computer power supply? I've been in the computer business for over 30 years and have never needed a power supply schematic. Just curious!

As I told someone before I have been the computer business for many many years and have never needed a schematic. I am curious why?

I love Corsair power supplies, but in this case I would go with the Antec TruePower TP-II 430. That particular Antec model is the best in it's class.

Test it. Unplug the molex connector from the mothrboard. You can use a wire or a paper clip to test it to power on. You will connect (short) pin 14 to and ground pin. (diagram here) For example, put one end of the paper clip into pin 14, and the other end into 13, 15, or 16. If the power supply turns on and fan running then maybe a problem with the front panel switch on the computer case.
P.S. make sure you unplug all other leads to drives before doing this.

If I remember correctly, the front panel header JFP1 (on the corner near the SATA connectors) conforms to the Intel standard for connections. This diagram may help:

got to here

http://www.antec.com/pdf/manuals/truepower_us.pdf

hope this helps

John

Why? In the many years in the computer business I never had a need for a schematic. Just curious!

I agree with you about the power supply being faulty. Unfortunately FixYa is not affiliated with Antec nor sells or service any computer components.
You need to contact the supplier who sold you the power supply or contact Antec.

The Power supply willhave to pin #16 connected to pin #15 for an ATX power connector. It would bebest to purchase a Power Supply Tester for about $20.00, which will test allvoltages with a load and give you a go or no go signal. If you want to use ameter to check voltages, here is a link for the pin outs.
http://www.google.com/imgres?imgurl=http://www.smpspowersupply.com/ATX-connectors.JPG&imgrefurl=http://www.smpspowersupply.com/connectors-pinouts.html&h=368&w=478&sz=30&tbnid=nhDjb8Eq1fhorM:&tbnh=99&tbnw=129&prev=/images%3Fq%3Datx%2Bpower%2Bsupply%2Bpinout&hl=en&usg=__4IVO2NEw5aG-llLitG7OvnQVAsY=&sa=X&ei=seVFTL7uEcP7lwehzcHOBA&ved=0CDQQ9QEwBg