BEHRINGER PMP4000 power source

I have a mixer PMP4000 (behringer) that burned their source and just want it to work the mixer
By default voltages of + -15 leads to their operational.
And 48v phantom power (this power does not interest me) .... however the voltage of the effects I have no idea what it is.
Anyone know what voltage is?
5 or 12???
I put 5 v but makes noise instead of the effects. the circuit is damaged or the voltage is not correct??? . Either way everything else works but I would like to use the effects :D
a little help please :(
thanks in advance
best regards :)