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Bought my PMP3000 in the UK but now I need to replace transistor
Bought my PMP3000 in the UK but now I'm looking for a transistor M50D060S or better yet a 120V power board (instead of the 220V) if feasible. How can I get this and which is better to replace the transistor or the power board?
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In my opinion, due to the physical appearance of pmp4000 and pmp3000 look the same, it will most likely also have a common circuit and parts list (at least, most).
Usually Behringer (and all the manufacturers), with the same series / sequence, using the same circuit, the difference is the number of channels only. You can compare the parts list on PMP3000 schematic, with your PMP4000. PMP4000. PMP3000
You have bigger problems than just the IGBT. I replace that part with part number:
APT28GA60BD15
About $6.50 from Digikey.com
You will probably find one or both of the gate speedup diodes blown PN DL4148 surface mounted an one or more of the driver transistors 2SSA1020-Y and 2SC2655-Y blown and usually the IR2153 switching regulator chip. If you haven't blown the 10 ohm ceramic pre-charge resistors you are lucky. Put a 150 watt lamp in series with the power cord to save fuses and parts till it is repaired. If you don't have schematic get back to us.
Yep! The power amp for that side has failed. There is a weakness of insulation in the multilayer board of some of these that causes the problem. If you haven't seen smoke, that is good. Depending on the revision level of the amp module, there will be two or three blown transistors and a Zener diode blown and possible arcing within layers of the board. The repair of the module takes great care and skill due to the arc damage which is internal on the multilayer board. The amp module is a HCA2400 and are rare costing about $160 and probably are out of stock at FullCompass.com which is the Behringer parts distributor... I have waited 3 months for simple parts... I had one HCA2400 shipped to me but they had wrapped it so tight in bubble wrap that capacitors were peeled off the board and it had to be returned. They didn't know when they would get more... If you have seen smoke, then two other small transistors and a metering resistor have blown. Worst case is when the power supply gets wiped out as well... that ups the parts ante to about $50 as two expensive IGBT's also fail and a half dozen other parts as well.
I have repaired three of the HCA2400 modules and it takes many hours with dental drill to carve out the burned cancer and then re-insulate and put jumpers where the circuit traces used to be. It is NOT DIY for sure. Replacing the transistors requires a desoldering station. I have one unit that a hacker tried using solder wick and destroyed the board.
I could tell you what parts are blown. If nothing lights up what has happened is the power amp (Usually the rearmost amp) has arced and destroyed the three switching transistors and a Zener diode and sometimes a metering resistor and two surface mounted transistors. So far parts cost is about $20 and a LOT of labor.
Since the fuse blew, it is possible as is often the case, that the power supply is also damaged. Now the total parts cost is $50 as two expensive IGBT's are blown, a regulator IC and four driver transistors for the IGBT's and one other surface mounted transistor and usually a diode. If a fuse has been repalced, then often a pair of power resistors associated with softstart are blown. A lot of labor is necessary on the power supply to remove the heatsinks that the IGBT's are on to replace them.
If the amp module (HCA2400) were the only thing, you can get those online complete for $175. Repair of those requires a lot of skill carving out burned board between layers of the multilayer board and restoring connections with jumpers.
You are probably looking at $300 parts and labor to restore this unit. I fix them for my own use, not others.
There is a weakness in insulation between internal and external layer of the circuit board near the rearmost amp and if you play it real load and had a speaker lead come loose the unit can arc and it is all over. There is also a polarity hazard. PLEASE read my tip on here in that regard about this. This applies to the PMP3000, PMP5000, PMP1280 amps.
If the supply failed I can tell you which parts to replace... and if it failed there may be a failure in the power amp that caused it. You can contact be directely at fredy2 @ aol.com... put Behringer in the subject.
The supply when it fails takes out eleven components including two expensive IGBT transistors. If the rearmost amp fried, add at least four more components and a lot of work carving out burned board and wiring around the blown circuit traces.
I have a PMP5000 that I had to resurect. I had to trace out the power supply to repair it.
I can give you hint: First, a small supply runs directely from the line and generates some of the small voltages. While this starts, the main power caps are charged through limiting resistors. The main switcher is brought online and if the power amps acheive balance, then a relay connects the speakers and shorts the limiting resistors.
This is what is in the 5000 and I suspect the 3000 is similar.
In my 5000, there was arcing at one side of the power amps. The board was burned and three power fets fried. Cancer of burned board had to be carved out and traces replaced by hardwiring.
In addition, the limiting resistors were blown open, both main switching transistors were blown and 4 small driver transistors (surface mounted) and several diodes AND a switching regulator chip (surface mounted).all fried/
Hint: When restarting the unit, put a 150 watt light in series with one of side of the power input to limit the current in case you did not get all the dead bodies out.
This is a class "D" amp which drives PCM waves into a filter which is then the audio output. It is much more efficient thaan a linear amp.
Repaired a PMP5000. Several transistors, a chip, diodes and resistors all destroyed by arc-over in power amp area. Faillure burned the board and had to cut the cancer out and jumper around blown circuit traces. Lot of work and takes great care to restart to avoid blowing components due to bad ones that repair missed.
M50d060s
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