Hello; I recently bought a used Behringer PMP5000 mixer. The monitors will only operate with the #27 switch in stereo position, and then with no control over them. I can't decide if I have a hookup problem or a faulty crcuit. Any ideas?
Without knowing how you have your monitors configured it is hard to analyze what you have posted.
In brief, SW3 on the schematic that selects MAIN L and MAIN R in the upper position, MAIN and MONITOR in the middle, and bridged in the lower is used to configure the internal amps.
In the upper position, the amp power outputs come from the mixed stereo bus and are simultaneously controlled as a stereo signal by the MAIN slider.
In the middle position MAIN and MONITOR, the left amp receives the signal from the mix bus and is controlled by the MAIN slider. The MONITOR output from the other side of the power amp is controlled ONLY by possibly the "MONO" slider.
The schematics are hard to decode and what is needed is a signal flow diagram.
For my uses, I don't try to use splitting the power amps between mains and monitor but prefer to use the mains together with SW3 in the upper position (Note your 27 may be refering to the user manual designation for same switch). I then use another small amp from the 1/4 inch MONITOR jacks whcih are under control of the MONITOR sliders.
Please note that the MIX for these two MONITOR channels is controlled by the MON1 and MON2 knobs for each channel.
Further note: It is unlikely you have a failure.
What you might consider Is putting one of the two MONITOR 1/4 inch outputs into the insert for one side of the power amps. Then that side will be controlled by one of the MONITOR sliders.
You would use a special cable with TRS connectors. This is quite similar to a stereo 1/4 inch cable and you might try one of those first.
Ideally, the tip of each needs to connect together, and the ring left floating, however, Due to the way things are wired I think you can get away with a plain stereo between the Monitor out and one side of the PA insert.
PLEASE ONLY MAKE CABLE CHANGES with power off!!! These amps can easily be blown... I know, I fix them... NEVER change a speaker cable with power on... Make sure connections are solid before powering on the unit.
Hi Fredy, Can you please explain to me how the Mon 1 and Mon 2 knobs work? Im looking at buying one of these units pmp5000. I would be running it in the middle position Main/Mon. So Im guesing Mon1 knobs control the levels for my monitor speakers. But what does the Mon 2 knob control? Where does that signal go? And is the Mon 2 knobs on all channels?
Thanks
Mark
×
487 views
Usually answered in minutes!
×