20 Most Recent Behringer XENYX 2442FX Mixer Questions & Answers

Often teh power supply fails because of other problems. Unless the board has flame damage the parts that are defective can be replaced... Getting some of the parts that are special can take time. Most of the components are available at many sources however. The SPS400 power supply can be repaired.

Here is link to schematic that should have the SPS400 as well as the rest of the PMH1000 on it.

http://elektrotanya.com/behringer_pmh1000.pdf/download.html

You should find +/-15 volts and +5 volts as well as the phantom power... but that light can come on at much lower than desired voltage.

Note that the regulators are current limited so a short on the mixer board can kill one of the voltages.... but you are not getting any input from teh switching portion of the regulator so the switching part of the supply is apparently dead. To replace the supply you would have to call Behringer at 1-425-672-0816 to get the part number and an incident number and then call FullCompass which is their part distributor now.

When working on a switching power supply, use an isolation transformer for safety and use a 60 watt lamp in series with the power cord to limit current during testing.

The circuitry will be SIMILAR to the power supply found on page 9 of schematic you can download at:

http://elektrotanya.com/behringer_ub1204fx_pro.pdf/download.html

Here is a schematic than is for a less number of channels (they just repeat) than yours, but is enough to fix it:

http://elektrotanya.com/behringer_xenyx_1622fx.pdf/download.html

Scroll down to the little link "Get Manual" and download it.

Were you able to get this fixed? I've been having the same issues and the Fishman support team's instructions for cleaning the pots didn't fix it.

I would contact Behringer directly..here BEHRINGER Limited Warranty You may need the manual here Behringer XENYX 2442FX Manuals

I assume that the power-amp is good. This noise, of course due to defective parts inside. But, which section is it? Chances are:

• Amplifier circuit in the Main-Outputs. If the MAIN MIX in the minimum position and still noisy, then the damage in that section.
• At one or several channels. Let's test. Set to minimum volume for all channels and MAIN MIX. EQ=flat. FX=minimum. TRIM at half (let's try at 12 o'clock). Raise the MAIN MIX, let's say at 15. Gently, raise channel 1 volume to maximum, listen, if there is no noise, channel 1 is safe. Lower the volume to the minimum again. Move to another channel in the same way. If found noise, that is where the problem is.

Actually, many more detailed steps for testing, but the description is too long. This above is a simple way. Circuit power supply should also be checked, whether all normal voltage. It is part of the image of the amplifier section circuit. Parts which may be broken is the IC 64,65,77.

Are you using a -20dB pad on input?

They should come on/flash when the associated button is set.

Which clip light on what and what mics are you using? The small room settings are from 10 so just turn the know to the setting you require and press it, this should set it. The stadard way of setting up mics is to set the channel gain so the channel clip light just blinks occasionally when you are making the maximum sound you can into the mic. For effects repeat this process using the aux send FX for each channel you want fx on (turn the rest to 0) and doing a balancing act between these and the aux send fx master so you can only just get the FX clip light blinking occasionally. Next set your gain/attenuators on the amp(s) so its clip warning can just trigger when you are giving it 0db when you are playing the loudest you ever will. A mic fading away could be the battery dying (in which case try using phantom power) or if they're radio replace the batteries before each service. If they're wired dynamic mics then it is possible there's some protection circuit somewhere that's reacting to the constant clipping and backing off the amp.

The clip light means your input signal is too high and distorting. Turn down the attenuator(input) knob until it goes out, use the channel volume for level. It should have a knob for the names of the effect selection.