Question about Behringer Xenyx 1002fx Mixer 10 Input 2 Bus with Efx

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Behringer Xenyx 1622FX. Power supply has failed, no +5V rail, other rails are OK, appers to be no input to the regulator. Could do with a circuit diagram. I believe the PSU is used in other mixers.

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Suspect a broken circuit trace or broken solder. If they use a 7805 three terminal regulator, check the solder around those pins...
Berhinger does NOT release schematics except to their service facilities... I know... I have tried... I repaair a lot of their stuff and have to trace out the circuits.

Power supply circuits are rather easy except for the switching regulators if they have failed totally.

If only the +5 is dead, you should be only a filter cap and a diode or two away from the problem... Transformer leads and electrolytic leads with their weight are favorite to pull out of solder... On Behringer, often the traces are narrow and can have a crack in them.

Posted on Jan 13, 2010

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Posted on Jan 02, 2017

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I have Behringer xenyx 1622fx , It will turn on the power but a few minute the power will turn -off , Please help me to solve the problem of this unit in power supply section or other section.


Here is your schematic:

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

Scroll down and find link "Get manual" and click to download.. IGNORE other download links they are for third party viewers. Power supply is on page 11. This is a switching power supply running from line voltage. For personal safety USE AN ISOLATION transformer when working on it. First thing is to measure all the voltage outputs before and during shutdown. Switching power supplies often require use of an oscilloscope to repair. The three terminal regulators that follow the main switching supply each have thermal shutdown so if one of them is being overloaded it will shutdown and that voltage will drop way down. Use great caution when working on the supply!!!

Jul 20, 2012 | Behringer Xenyx 1002fx Mixer 10 Input 2...

2 Answers

I have a Behringer zenyx 2442fx mixer. I was using it one day and all the LEDs started glowing brighter and brighter until the whole desk went dead. It has not worked since. I'm guessing the power...


That sounds bad! I haven't heard of a runaway supply for these... Testing of the power supply is in order. The LED's are all driven from the +15 volt supply which is secondary regulated by a three terminal regulator... probably a 7815. I have seen failures of this chip in another Behringer product so it may be a bad batch. The question now is if this has fried the main switching power supply.

Nov 02, 2011 | Behringer XENYX 2442FX Mixer

1 Answer

Behringer XENYX 1620FX, won't power on. Phantom power works(?)


Here is a schematic close to your unit:

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

Scroll down to "get manual" and click to download. Ignore other download links.

The phantom power is a separate rectifier and regulator. See page 11 of the download service manual for the power supply. Be careful when working on line operated switching supplies. I suspect you will find one of the other supplies is dead. If the phantom is OK, then the switcher is working and one of the rectifier/filter/regulators is bad. Check if an electrolytic cap is shorted.

Jul 21, 2011 | Behringer Xenyx 1002fx Mixer 10 Input 2...

1 Answer

NO POWER. CORD TESTED OK AND IVE ALREADY CHANGED THE FUSE BUT STILL NO POWER...


Why did you change the fuse? If it was blown, then power supply has failed. Here is your schematic. The power supply is on page 14.

http://elektrotanya.com/behringer_ub-2222fx-pro.pdf/download.html

Scroll down the page at the site to the "Get Manual" Click on that to download the schematic. When working on line operated supplies use an isolation transformer for personal safety. The regulator chip IC2 has probably failed but test before changing. HINT: When restoring the supply, put a 60 watt light bulb in series with the hot power lead to act as a resetable fuse... saves fuses and also other components if all the bad parts haven't been weeded out.

May 11, 2011 | Behringer Xenyx 2222fx Premium 22 Input...

1 Answer

Hi all i own a behringer XENYX 802 audio mixer. this device is powered by a power supply that as input to the mixer gives 18,5 x2 Ac, 150ma. i would like to know in which point of the circuit i can...


You would need TWO DC supplies as they use AC so they can create both a plus and minus 15 volt power source to run the internal op amps.

Here is a schematic for the 1202 which has same power supply configuration as the 802.

http://elektrotanya.com/behringer_xenyx_1202.pdf/download.html

Scroll down to the little link "Get Manual" and download the service manual and schematic. You will find the power input in the upper left corner of page 5.

Mar 29, 2011 | Behringer Xenyx 802 8-input 2-bus Mixer W/...

1 Answer

I have a problem with Behringer mix ( UB 1832-pro) does not work multi-efects. I need a power supply plan. This link ( http://elektrotanya.com/http://elektrotanya.com/behringer_xenyx-1222fx_v1000_dpm5m...


Try this link:

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

On page 11 is the power supply. The TIP31 (T1) is the regulator for the +15 volt rail. The TIP31 is connected as a Darlington with a BC846 (shown on the schematic as "846"). This is a surface mounted tiny transistor.

NOTE: This regulator is NOT a voltage regulator but is actually an ACTIVE ripple filter consisting of the 2.2K resistor (R6) bypassed by the capacitor C4 (100mfd/25v). R8 (120 ohm) serves as a parasitic suppressor and base surge current limiter for the BC846 transistor (T4).

Feb 23, 2011 | Behringer Xenyx 1832fx Mixer 18 Input 32...

1 Answer

My Behringer XENYX 2442FX Mixer does not power up, the only light that comes on is the phantom power light. I opened it up and noticed that the switching power supply has multiple voltage outputs. We...


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

Dec 15, 2010 | Behringer XENYX 2442FX Mixer

1 Answer

Behringer mixer power goes off after running about 5 0r 10 minutes then power turns on.what is problem with the power supply board


That time lag would indicate a thermal problem.

Likely the power supply is a switching type that has some three terminal regulators after it such as 7805, 7815, 7915.

These have thermal protection in them and one may be shutting down.

Use circuit cooler to isolate the part that is shutting down.

May 20, 2010 | Behringer Xenyx 1002fx Mixer 10 Input 2...

2 Answers

Xenyx 1002fx Mixer 10 Input 2 Bus with Efx: behringer mixer power goes off after running about...


Problem is likely thermal. Open unit carefully and use freeze mist (circuit cooler) to find bad component.

With that long a time period, it is possibly a component mounted on a heatsink.

May 18, 2010 | Behringer Xenyx 1002fx Mixer 10 Input 2...

1 Answer

Behringer XENYX 1622FX, won't power on. Phantom power works(?)


After reviewing the schematic, I don't understand how the Phantom power can REMAIN on with the power switch off... this CANNOT occur except for what energy is left in the 48 volt supply filter cap... This might last for minutes after the fuse went... UNLESS you have devices connected which are backfeeding the 48 volts. (which would be a disaster)

The 48 volts, +/- 12 volts and +/- 15 volts and the +5 volts ALL come from the SAME switching power supply. I suspect one of the filter caps went or the primary switching regulator a TDP245Y chip.

You should ONLY work on the line side of this using an ISOLATION transformer since the line side has lethal voltages.

To do testing, one replaces the fuse and puts a 60 Watt light bulb in series with the hot side of the inout line. The lamp "acts" as a resetable fuse and limits the current for testing. When all is well again, the lamp will remain out with the power flowing through it.

The D1 diode bridge and C7 input rectifier and filter are first things to check. You can do those with an ohmmeter.

I will caution you to ALWAYS power any and all equipment from the SAME power source. Plugging in devices from across the room will set up ground loops and any ground fault will fry equipment.

Apr 04, 2010 | Behringer Xenyx 1002fx Mixer 10 Input 2...

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