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behringer pmx2000 Wires hooked up wrong.

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  • behringer pmx2000 Wires hooked up wrong.

    Hello All,
    I have a pmx2000 that my tech hooked the wires up on the power end wrong and burned up the 47 ohm and 18 ohm resitors up at the section of the board in the speaker and thermal section of the board. what else should I change in that circuit I see there are j243 motarola transistors there when you hook the mixer up now it seems to be trying to burn up more things I think I have figured out where the 2 black and 2 green wires go on the power in board but things keep burning up the level indicator lights on 1 channel are spiking the original problem was the 2 10,000 mfd caps opened up if you smacked it on the side it would work for awhile but now my tech has made a bigger mess of it and I don't have alot of money to send it to anyone for them to try and figure out his mess but I'm trying to get it figured out and I really need this piece of equiptment for my 1 man show and my band. Any suggestions would be greatly appreciated. Thank you. If anyone has one of these around I could get or has a parts one or an amp module for it. I don't mean to sound so cheap but I just lost my house in a fire and my sound company is going bankrupt do to the economy and the closing of 1 of my major accounts any help would be greatly appreciated.

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  • #2
    There is no telling what it needs. There is a triac on each speaker connection, see if they have shorted. It is not convenient I know, but you need to take the amp module apart and start exploring all the parts. if that 18 ohm resistor is fried, the MJE243 most likely is also. You need to go down the row of part and test every semiconductor in it. Set your meter to diode test and get going.
    Education is what you're left with after you have forgotten what you have learned.

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