I need a wiring diagram for the main circuit board in a behringer djx700 mixer

Behringer fired their USA distributed a few weeks ago. You'll have to call Behringer directly and request the part. Or email.goto th website

the faders were actually fails functioning it well, it must be replace a new one!im a audio technician of BEHRINGER!

It sounds like one of the output devices is going bad, ie., output transistor, capacitor, resistor or maybe just a bad connection on one of the above menitoned items. One other problem which causes this would be the main or sub volume slider or pot is wearing out and needs to be replaced.It would definately be worth your while to have a technician trace down and fix the problem on this board. Hope this helps.

The XLR mic connector is a board mounted part... You will not like the effort to replace it as most of the hardware must be removed from the panel to allow the circuit board to be removed so you can swap the XLR connector. Getting parts from Behringer is time consuming... but may be the only way to insure getting compatible one. Call Behringer to get their part number at 1-425-672-0816
The order from Full Compass... expect it to take a couple months as their repair parts chain is really slow now.

Open the unit and search for a hot chip with your finger on the failing side.

One of the chips or circuitry is likely drawing too much current. I have seen traces on a circuit board start to short out and cause this due to spillage of liquid in a mixer.

You could use circuit cooler to cool suspect chips to see if it restores. This would be a quick way to isolate bad chip.

Semiconductor things involved with sending the booth signals into the mains are:

IC2 which is a 5241 gate controlled by MIC_ON.

IC30 4580 summer for MIC and BOOTH.

IC53 4580 inversion and gain control.

IC39 4580 MAIN output drivers.

It appears that both these use a 50K pot in the identical circuit and it is UNLIKELY they re-engineered very much so it is likely they use the same pot.

Behringer parts service should be able to tell you.

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.

The effects on the PMP powered mixers flash UNTIL you push in on the selector knob. This way you can dial in the next effect number and then push in later to activate when you want it... Could yours possibly be the same technique?

Most likely the fuse for the effects circuit has blown, which happens sometimes on mixers with built in effects.

You'll have to open the mixer as the fuse will be inside the mixer on a circuit board (look around inside where the effects part of the mixer is) replace it with an identically rated working fuse and you should be done.