Processing ATX-power supply (transformer winding)?!

[radio]

Hi all !
Transformer ATX - power supply from 500W to 12VDC secondary (5V or 3.3V is not).
How the transformer windings, primary winding to the secondary and how to get the coil output voltage 2x31Vac (2x40Vdc) and the current to 6A ?-):w)
What section of lacquered wire should be for secondary and primary who ?
thanks

 

[cristachelu]

I'm not sure if you can open the 2 cores as they are glued together to eliminate vibrations and/or losses.
Even if you manage to split them up you will need to work on the current/voltage feedback loop since your needs (voltage/current) are different now

 

[radio]

Transformer is labeled BCK-01 TUV (ATX-power supply Deluxe PA-500W).
Q: How many coils of wire and painted with a section which should be the motto and how primary winding wires should be hanging with and secondary to that section to get a secondary voltage of about 2x32Vac with power up to 6A ?
Thank you for your response!

 

[radio]

Hi
Transformer Court put it with water and put it on the stove to boiling for about 5 minutes!
Then just when it is hot breaking transformer!
cheers

 

[zeus_threat]

Hi if its a half bridge psu primary side of transfo has only two of three pins and the secondary is the one that has most of the pins normally 3 pins for 12V and 2 pins for 5V and the secondary has a big leg that comes out of the top thats at least the case with most low priced pc psu more sophisticated ones with pfc and smd components are different. otherwise simply follow the wiring secondary is the one connected to output diodes. Rewinding is a bit complex as you have to take the whole thing apart as the secondary is sandwiched between two primary layers

 

[radio]

Behold the SMPS supply schematic: