I want to know how to send the signal from a Europower pmp 3000 to two external amps

Question Edited to add make and (what it is). Please always include as it helps us to help you better.

Direct to the factory.

https://www.behringer.com/service.html

..

$185 to $300 used

These are no longer made but I see them on the used market in the USA in the $200-250 range.

You can get the entire service manual for this unit here:
BEHRINGER PMP6000 SCH Service Manual free download schematics eeprom...

You can download Service Manual of Behringer PMP3000 free of cost on below link:
https://www.electronica-pt.com/esquema/audio/behringer-audio/behringer-pmp3000-16040/ Behringer PMP3000

Yes, you blew out components associated with the monitor sends. There are several components including an RF bypass to ground and the driver IC, IC8 and a decoupling electrolytic cap. The repair is going to be extensive as it is likely you will have to remove ALL the panel knobs and screws to free up the circuit board for repair. I have worked on several mixers and have three of the PMP5000's myself and dread removing the main board. I am going to suggest something you might consider: Many of the PMP's fail either in their power supply or one of the amps. Due to the repair cost I would consider getting a scrap PMP with this problem and swapping out the panelboard for yours. Often you can get one with blown supply or power amp for around $200 and I suspect a repair shop is going to charge at least that to repair your unit... Then you will have a spare parts bucket as well.

What is up is one of the two power amps is blown... I know this problem... It is USUALLY the rearmost channel which goes to the left Speakon faacing the back. Weak insulation between layers of the multilayer circuit board arcs and fries three transistors and a diode and sometimes a few more components. It takes a lot of skill to restore the module and is beyond most repair shops. A whole new module costs about $155 from Full Compass. The amp is an HCA2400 module, but you MAY need the Behringer part number to order it from Full Compass. Also please read my tip on Fixya for PMP mixers regarding the hazard when using 1/4 inch plugs from the Speakon connectors... the Channel A sleeve is the "hot", not the tip and if you ground the sleeve, goodbye channel A...

Di you mean this one? -> http://www.behringer.com/EN/downloads/pdf/PMP1000_P0566_M_EN.pdf

You will have to have it repaired. Also read my tip regarduing the PMP mixer/amps that if you use 1/4 inch cable plugs to speakers, the SLEEVE of channel A is hot, not the tip. It the sleeve shportss to somehing that is ground, goodbye Channel A or more. This is not in the book.

Unit has wide range power supply will operate on 100 volts to 240 volts without any change other than possible plug adapter to mate with each countries receptacle standard.