How can is stop the effects on my behringer europower pmh660m from popping and resetting?

SOURCE: my effects on the behringer djx 700 dj mixer stop working how

This is a wild educated guess.

I repaired a Behringer guitar amp that had a DSP effects in it (BX1200 I believe).

The effects were on a seperate board and the board had its own 5 volt power supply. The filter capacitor for the 5 volt power on the board was UNDERSIZED and it had degraded causing the 5 volts to drop out of regulation, dipping to 4 volts. This caused the DSP effects to fail.

YOUR device MAY use the same DSP OR design.

Check the 5 volt power with an OSCILLOSCOPE to look for dips below the 5 volt operating point that occur at 120 HZ.

SOURCE: I need an owner manualfor a Behringer pmp 3000 16 channel mixer

Hi,

You can download the manual by clicking this link

You'll require Adobe PDF Reader installed on your PC to view this manual. If it is not already installed on your PC, download it free from:

http://get.adobe.com/reader/

Hope this solves your problem. Thanks for using FixYa

SOURCE: My Behringer Europower Pmp5000 Powered Mixer blew

Probably the channel A went. If you are fortunate, the power supply is still OK. There are protection circuits for the speakers, however you MUST use speakers that are rated at over 400 Watts. If you use smaller ones, they can get blown. There is a weakness primarily on insulation for channel A and an arc between layers of a circuit board can wipe out several transistors and a zener diode and sometimes a metering resistor. Once this happens, have unit serviced before using it again as further damage can result.
ALSO PLEASE read my tip I posted on FIXYA regarding a grounding hazard when using Speakon to 1/4 inch speaker cables... essentially the barrel of the 1/4 inch jack of the A channel is the hot lead, NOT the tip for that channel.

SOURCE: I have a pmp6000 powered

Cease using the mixer until it is repaired. One or both of the amps have blown. Further use MAY result in power supply damage. 1 to 6 switching power transistors will have blown and often a Zener diode or two. If the metering resistors smoked, there will be two small surface mounted transistors per channel blown wide open as well. These are all in the HCA2400 amplifier module.

SOURCE: behringer europower pmp1000, mixer unit,

ALL LED's should NOT be lit all the time. If thsy are, there is a failure in the power supply.

plug headphones into the 1/4 inch main output jacks on the top... you will only hear sound in the left side headphone for each. This would verify the preamp is working.