LEVEL POT ON A BEHRINGER EURORACK MX 602A-BAD

Please verify if your computer has a sound card. You will need a provision on your computer for audio input. Let me know.

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.

The microphone preamps are different. The Xenyx has lower noise mic preamps.

Sounds like it may have failed. Yes, it is likely that it needs to be returned. Another option is to unplug all inputs and outputs. Plug in ONE device into the board, and use the headphone jack on the board. Does it sound the same? Just basic troubleshooting may help.

No you can't.
Because the other channels are LINE LEVEL, not mike level.
Sorry.....

Sounds like the output cable from the 802 is not correctly pinned to your input on the computer. Fred is on the right track but you may need to take it a bit further.
It may also be helpful to use a Pro USB audio interface such as the Digigram UAX220v2 (line level version).
If you wish to use the computer's on board sound card consider an IHF/Pro interface that converts balanced audio to unbalanced , and the proper cables. Two 3-wire balanced 1/4-inch from the 802 to the left and right inputs of the interface (XLR Male), then RCA (Red and White) to a 1/8-inch TRS Plug cable onto the the computers audio input.
Henry Engineering's Matchbox HD comes to mind.
Good Luck.

You could use the Left inout of one of the stereo channels. You can pan it with the balance control as needed... HOWEVER remember these are LINE LEVEL signal levels into the stereo jacks... so if you are using instruments with low output you MIGHT have to use a preamp to go into these jacks. Try it... nothing ventured, nothing gained. Using a keyboard into these jacks would NOT be a problem.

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.

It sounds like one of the output devices is going bad, ie., output transistor, capacitor, resistor or maybe just a bad connection on one of the above menitoned items. One other problem which causes this would be the main or sub volume slider or pot is wearing out and needs to be replaced.It would definately be worth your while to have a technician trace down and fix the problem on this board. Hope this helps.

Behringer uses 4580's in appropriate packaging everywhere. There are 339 comparators for the level indicator area.

The Mackies uses both NJM2068 and NJM4560M

The 2068' are used in most of the low noise areas and the 4560 is used in the 75Hz high pass filter for example.