This MAY be a power supply problem. We need to find if the power supply is putting out what it is supposed to. Using a meter, put one probe in pin 1 (ground) of one of the mic connectors, say channel1. Put the other probe in either pin 2 or 3 of another mic connector... Note we are using different connectors as there often isn't enough clearance for the probes in the same one... With Phantom power turned on and LED +48 lit, how much voltage do you read? If it is say 40 volts or more, then power supply is operating.
If the supply is operating then a POSSIBLE problem is a connector has fallen off where it connects to the supply or the main board.
The power supply provides several voltages such as 5 volts, 12 volts and 15 volts of various polarity.
If the 48 volt supply is found to be operating with the above test, then since the switcher and transformer are shared, it is likely the other voltages are available.
CAREFULLY open the unit and look for a loose cable.
PLEASE NOTE: This is a switching type power supply and part of the supply runs at power line potential. Only work on the supply if you are skilled and have an isolation transformer for your own safety.
You can't activate something you don't have. The XENYX do not have compressors built in.
If you are getting mic distortion you are not properly setting up the mics.
You one at a time press the PFL down and have someone yell at the mic the loudest they will ever be. You adjust the trim control for that mic to be below the clip on the LED display. The you turn that PFL off and go to the next mic.
From that point all mic adjustments are from the slider. If you can't get enough gain, then back off ALL the other non-mic inputs and crank up the main slider and/or the power amp gains.
You have to learn to balance all the gains.
There are instruction videos on YouTube under "Soundboard".
This sounds like a breakdown in the digital circuits. You are seeing/hearing digital noise. This is most likely an IC that is breaking down internally. This will take some time to find/fix. Use the unit for your gig, then return it under warranty for repair. Pay close attention and note WHEN the problem occurs. If possible, try this multiple times and record any pattern to when it happens. The more detailed the "timing" the easier it will be for the repair shop to reproduce the problem and fix it.
In a word, you DON'T... The main fader is the ONLY volume control in the loop going into the TAPE inputs.
If you need another volume control, then either use volume control if availlable on the tape/MP3 player.
Your other option is to use a splitter cable from the MP3 into one of the stereo input channels which do have level controls.
Now if you want to have the tape input level INDEPENDENT of the main slider, that is not really possible either. Adding a mixer AFTER the mains could accomplish this, but that is extra hardware.
The fader is likely a dual pot. The manufacturer is likely ALPS. You need to match the board hole layout, slider throw, resistance, AND TAPER.
There will be a number on the side of the pot that will have the resistance and taper... It is likely an "A" taper which is an audio log taper.
Replacing this involves removing about the right 1/3 of knobs, screws, and jack mounting nuts and washers to remover the circuit board the pot is mounted on.
There are connecting cables to be removed.
Try to find part at DigiKey.com or Mouser.com. Note that the handle MAY be too long. Shorten the handle with tin snios and remove the burr.
BEFORE any of this is done, you should investigate to make sure it is the fader. If the left channel is intermitent scratchy then the fader is likely bad, These will get scratchy before they fail... If that is not the scenario, then there probably is something else bad.
Since the board is similar to the eurodesk model, on that one DO NOT plug mono 1/4 inch plugs into the mains output 1/4inch jacks as those are TRUE TRS balanced lines.
Faders that get contamination in them can be a problem.
The external driver chips CAN be damaged when people connect the unit to amplifiers that are run from a power source at opposite ends of an auditorium for example, due to common mode ground loops and faults.
Setting up a system is one part knowing what equipment is needed and one part electrical engineering regarding safe interconnection of low level audio signals.
You will need an oscilloscope and a good grounding in electronic servicing to attempt a repair.
But, check the signal routing. Refer to the user manual.
It sounds like you're experiencing a couple of issues with your Behringer Xenyx 1204FX mixer. Let's address each of these problems separately:
DSP Display Not Illuminating: The fact that the DSP display works when you press down and turn the knob suggests that the issue might be related to the display itself or its connection. Here are a few steps you can take to troubleshoot the problem:
Check Power Source: Ensure that the mixer is receiving proper power and is turned on. Sometimes display issues can be caused by power-related problems.
Connection: Make sure the ribbon cable or connector that connects the display to the circuit board is properly seated. A loose connection could be causing the display to not illuminate.
Faulty Display: If none of the above steps work, there might be a problem with the display itself. You may need to contact Behringer support or a professional technician to get the display repaired or replaced.
AUX 1 Send Not Working: If the AUX 1 send is not working as expected, there could be several reasons for this:
Routing Settings: Make sure that the AUX 1 send is properly routed to the desired destination. Check the routing options on the mixer to ensure that the signal is being sent to the correct output or destination.
Level Controls: Verify that the level controls for AUX 1 are set correctly. Make sure that the AUX 1 knob for the specific channel you're working with is turned up.
Effects/Processing: If you're trying to send a signal with effects applied, check if the effects are set up correctly. Sometimes, an incorrect effect or routing setting can affect the AUX send.
Cable and Connections: Ensure that the cables connecting the AUX 1 send to external devices (such as monitors or effects units) are functioning properly and securely connected.
AUX Master Level: Confirm that the AUX 1 master level (usually located on the main output section of the mixer) is turned up to an appropriate level.
If you've gone through these troubleshooting steps and the issues still persist, it might be a good idea to consult the user manual for your Behringer Xenyx 1204FX mixer for further guidance. If the problems continue, you may need to reach out to Behringer support or consider seeking assistance from a professional audio technician or repair service.
Hello Geoff, try using an external processor and check that it works well, if so, the problem is that you have the Jack connectors of Effect sending and those of Return of Effects, dirty
Apply a couple of drops of oil, type WD40, to a Plug connector and insert and remove them repeatedly in each connector Jack for sending and returning effects
I hope you can solve the problem, comment the results
Greetings Franco Dosil
Hola Geoff, prueba usando un procesador externo y comprueba que funcione bien, si es asi, el problema es que tienes los conectores Jack de envio de Efecto y los de Retorno de Efectos, sucios
Aplicale en un conector Plug un par de gotas de aceite, tipo WD40 y entralos y sacalos repetidamente en cada conector Jack de envio y retorno de efectos
Espero puedas solucionar el problema, comenta los resultados
Saludos Franco Dosil
https://media.music-group.com/media/PLM/data/docs/P0A8M/PMP1680S_PMP980S_PMP960M_M_EN.pdfhttps://c3.zzounds.com/media/PMP1680S_P0A8M_OI_EN_ES_FR-df44b2314272dfc61a7cabe5bb88ecce.pdf
Check all the wiring connections on the speaker. Check the plug in points for the cables are not loose in the body of the speaker or the connector plugs themselves are not loose in the actual plug sockets.
Next you will need to get inside the speaker body to check the connections and soldered joints. Take a good look at the back of the cable plug sockets and to the back of the actual speaker cone connections. Check each wire at Both ends for damage. No sound at all suggests the issue might be at the 'Input' where the cable plugs into the back of the speaker body.
If the right input on your Behringer Ultracoustic ACX1800 CD is not working, it could be due to a number of reasons, including:
A faulty cable or connection: The problem could be as simple as a loose or damaged cable. Try swapping out the cable with a known working cable or check the connection to ensure that it is secure.
A blown fuse: The ACX1800 CD has a built-in fuse that protects the internal components from power surges or other electrical issues. Check the fuse to make sure it is not blown and replace it if necessary.
A damaged preamp or amplifier circuit: If the problem is not with the cable or fuse, it could be due to a damaged preamp or amplifier circuit. This can be caused by a number of factors, such as overheating, power surges, or other electrical issues. In this case, you may need to take the ACX1800 CD to a professional repair technician to diagnose and fix the problem.
A faulty right channel input jack: It is also possible that the right channel input jack itself is faulty. This can be caused by wear and tear over time or physical damage. In this case, you may need to replace the input jack or have it repaired by a professional technician.
Based on my research, the Yamaha PMH5000 mixer features two 1/4-inch "insert" jacks for connecting external effects processors, such as compressors or equalizers, to individual channels. These jacks are not intended for connecting external power amps.
However, the PMH5000 does have two "main out" jacks that can be used to send the mixed audio signal to external power amps. These are typically located on the back of the mixer and may be labeled as "L/R" or "Main Out."
When you connect an external power amp to the main out jacks, the signal is sent directly to the power amp and is not routed through the internal power amps of the mixer. The external power amp then amplifies the signal and sends it to the speakers.
It is important to note that when using external power amps, you should adjust the volume levels carefully to avoid damaging the speakers or the power amp.
