Question about Behringer Pmp3000 16 Channel Audio Mixer
Oh, oh... got one on the bench now... There is a design defect that causes a short and destruction in the power amp portion.
Do a test: Plug headphones into the main 1/4 inch jacks. The sound won;t be very loud since these are line outputs, not for headphones.
IF you get sound out those, then one or both power amps are dead.
Worst case: if one amp is dead, several parts including three power MOSFET transistors are fried for any of the dead channels.
The failure of the amp can wipe out the main power supply. If you effect windows light up, then the small power supply is operating.
If the big supply is fried, there are two large MOSFET switching transistors that are gone. Often several smaller transistors and dides and resistors and one switching IC goes. MOST of these are surface mounted parts and would be beyond the scope of what you can repair.
I am trying to contact Behringer about the flaw but haven't heard back yet.
The nature of the flaw is this: The is insufficient clearance on an internal circuit layer from the edge that fits into a slot in the power amp heatsink. Any humidity that enters can cause the insulation to breakdown and arc to the heatsink causing a chain reaction.
I repaired one of these already before finding the cause, but this one had a smoking gun! I just yesterday milled out the slot deeper and wider and will put insulating tape to prevent further arcing. The arcing that had occured burned away the internal layer and the connections. I will replace thoose with hardwire.
Repair of this problem is time consuming to weed out all the blown parts and to safely bring the unit back to life.
The current unit I am working on took out ONLY the power amp. A 30 milliohm resistor went up in smoke making a real mess. All three power MOSFETS are gonzo and a zener as well... don't know what else I will find. The previous unit was worse as the power supply was wiped as well.
Posted on Feb 07, 2010
A 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
The service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
Tips for a great answer:
Jan 14, 2013 | Music
Apr 14, 2012 | Gem Sound TRF152 15 Pro DJ PA Speaker
Feb 16, 2012 | Behringer Music
Sep 02, 2011 | Behringer Sx3242fx Eurodesk 32-channel...
Feb 25, 2011 | Behringer B2PRO Gold-Sputtered Large...
Feb 01, 2011 | Behringer Europower Pmp5000 Powered Mixer...
Jun 09, 2010 | Behringer Xenyx 1002fx Mixer 10 Input 2...
Sep 20, 2009 | Behringer Pmp3000 16 Channel Audio Mixer
Aug 26, 2009 | Behringer Pmp3000 16 Channel Audio Mixer
Jul 03, 2009 | Phonic Helix18fw 18 Channel Mixer with...
Sep 30, 2014 | Behringer Pmp3000 16 Channel Audio Mixer
300 people viewed this question
Usually answered in minutes!
Step 2: Please assign your manual to a product: