Question about Behringer Pmp3000 16 Channel Audio Mixer

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No Power at all. Fuse blown-Burn smell from fan area.

Hi there, last nigh I played outdoor with my Beringer PMP 3000 Mixer in rainny conditions. Everything was fine with the ipod playing away sounding great until I put the mics were on and a spark/flick sound came through the monitors and then the power went (Fuse) A spaky at the venue changed the fuse but it was 10amp not 6.5 and then smoke appeared and I disconnected instantly. Please help could it be possible not much damage is done? Now-No power and burn smell from the fam area at rear!

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You did a lot of damage, and replacing the fuse and trying it has caused much more.

There will be about seven blown parts on the amp and a dozen on the power supply. To give you an idea of the extent, the WHOLESALE parts cost is roughly $50, including the main power supply switchers IGBT's which cost nearly $20 for the pair by themselves.

I have repaired several of these and the larger cousin the PMP5000. It is a lot of skilled work to repair these.

The cause is a marginal insulation between layers of the multi-layer amplifier board. Usually the rearmost amp arcs between the layers. This fries three big switching transistors followed sometimes by a metering resistor and two small surface mounted transistors. A zener diode often goes. The cancer and burned area has to be ground out with a dental drill and new wire replaces the blown circuit traces.

If you are under warranty, take the unit for replacement.

The thing that can arc the amp is if speaker leads are marginal or get pulled out while under power. Excessive volume, especially pulses at high level can break down the insulaton causing the arc and failure. The black smoke is likely from the metering resistor.

Posted on Jul 30, 2010

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Try this Behringer support:

BEHRINGER USA, Inc.
18912 North Creek Parkway, Suite 200
Bothell, WA 98011
Tel.: +1 425 672 0816
Fax: +1 425 673 7647

I just repaired a PMP3000.

A bit of warning on these. Do not let a speaker leads get pulled while powered. They can arc out the power amp causing extensive damage.

If the fuse ever blows do NOT replace the fuse as much more damage will result. Service the unit before using.

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When these blow, there is damage inside that must be repaired before restoring power.

To get an exact replacement fuse holder it is best to get it from Behringer parts. This one has a switch in it depending on which way the fuse carrier is inserted.

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