Reported problem: audio output on desk low, restarted and fine for 5 min then low output.
Tested: +/- 16V rails, no ripple or fade when power supply forced to run hot. resistance test on power supply cable, connector from power supply output to termination on board in console. Tested sign wave in/out on channel to outputs with O scope with no problems seen until voltage limit clip. One channel had bad fader and it was replaced.
I am going to test desk without inserts normally used to see if it is out board gear today
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The rule of thumb is you control your audio on the low side. That means you plug your mics, tuners, audio sources into the pre-amp and then the pre-amp into the equalizer/mixer ant finally the mixer into the power amp and the amp into the "large honkin' speakers". The inter connects on the low side (between the source, the mixer and the power amp are usually done with RCA plugs. Use a good quality set of cables to get good tight connections and solid grounding. AUDIO SOURCE?MIXER?POWER AMP--- heavy speaker wire sized to your SPEAKERS.
This is applicable to the PMP powered mixers regarding an undocumented issue of polarity of speaker connections.
Failure of the "A" side of these units can happen if Speakon to 1/4 inch speaker cables are used and IF the barrel of the 1/4 inch plug becomes grounded. This can happen from careless handling or from intentionally trying to parallel another device from the output which results in a ground being placed on the barrel of the 1/4 inch jack on the "A" side of these mixers. The barrel of a 1/4 inch on the "A" side is the "hot" from the amp.
Upon analyzing the circuitry, these mixers internally invert the audio signal to the "A" side and then the speaker connections reverse the polarity again. Behringer does this to easily allow "bridged" operation of the amplifier.
This creates a hazard that can result in blowing the "A" side amp of these mixers.
If one ONLY uses Speakon connectors everywhere it is NOT a problem, but anytime 1/4 inch plugs are used in the speaker cable system, the hazard exists.
No, you can't just jump the pins together. The power supply in the mixer needs two separate 18-volt AC inputs because it makes two supply voltages, +15 and -15 volts.
The external supply is just a potted 36-volt transformer with a center-tapped secondary. I bought an open-box Behringer (not your model, but similar) that was missing its supply, and found this transformer which works fine. (I actually did find a couple of sources for a replacement Behringer supply, but it cost more than I paid for the mixer!) Just connect the three output leads to the appropriate places on the mixer's PC board. In mine, I removed the original input connector and soldered a pigtail with a 3-pin connector from Radio Shack to the PC lands, then attached the matching plug to the transformer leads. You'll also need to provide an enclosure of some kind to prevent contact with the line voltage input to the transformer and to protect the thing if you carry it around.
This is relatively easy. All you need are two stereo RCA cables and RCA to 1/4" adapters. Plug the 1/4" adapters in to the FX1 send jacks on your mixer ( 1 only if you want mono echo, 1 & 2 if you want stereo ), and the other 1/4" adapters into your echo units in and output jacks - of course if you have 1/4" cables, you won't need the adapters.
The output of your echo unit then plugs into the FX return jacks on your mixer. Set your FX1 and FX2 send controls on the channels you want echo up to the 12 o'clock position and turn up the FX send masters also. You should see some level indication on your echo unit. The turn up the FX return controls on your mixer to the extent you want echo.
You may have to do some adjusting of all controls on the mixer and echo unit to get just the right amount of "dry" and "wet" sound.
In order for this to work, you need what is called an "insert" cable. This will have a balanced 1/4" connector on one end and 2 1/4" mono-connectors on the other. The balanced connector is also known as a TRS connector (Tip,Ring,Sleeve). You should have "insert" jacks on the mixer. Place the balanced connector into whatever insert you wish to use (usually this is inserted into the main insert).
One of the 1/4 plugs is for input, one for output. I don't know which is which for your specific unit, you will have to experiment.
Keep us posted.
Just try to resolder all component parts in power supply section,maybe there is a loose connection or cold solder joints that causing of abnormal voltage or missing voltage.Also check the resistor for cange value causing the voltage trap.Check also all electrolytic capacitor for leak.
Hope it may help you;;
I am not familiar with the particulars of your specific model, but with switch mode supplies in gereral, look for defective filter caps on the output side or a defective Zener Diode. If you can post a few photos of the power supply section, I may be able to guide you to the likely parts.
I think the Echo's output goes into the mixer's input.You should be using one's output into other's input...that's how things work.If you r talking about both the system's input then they won't work with each other.
Other thing is that if it's mono then there r cable available for the use which transfers mono to stereo input and vice-versa.
Behringer are pretty good at supplying schematics and information in PDF form. Have you approached the distributor in your country. They are pretty good at supplying info, and dont usually charge. Just rather see the product sorted out. Email a few and see how you go :)
Connect either of the XLR DI output of the Behringer directly to a MIC IN channel on the Powerpod using a standard Microphone cable. If you wish to push a stereo sound then connect both(L + R) of the XLR DI outputs from the amp... that's about all you need to do. The only reason you need to use stereo(both XLR Outs) from the Behringer is if you want a full stereo FX output from the amp, otherwise you can get away with 1 connected. You may need to back the gain off for those channels on the power pod. You can get a manual for the Powerpod from here