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Thread: QSC RMX4050

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    QSC RMX4050

    Can anyone look up the generic part numbers for Q112 and Q113 for me?
    Thanks

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    Lifetime Member Enzo's Avatar
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    Is there a schematic?

    When I was servicing for QSC, none of the parts had coded numbers or house numbers. There were unusual parts like IRFZ44, but that is a real part number.

    What numbers are on the existing parts? If they are burnt, look at the other channel.

    Or where are they in the circuit, what do they do?

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    Education is what you're left with after you have forgotten what you have learned.

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    This is a very small transistor and I dont have a microscope on my home bench. I will have to wait till I have access to my microscope I guess.

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    Supporting Member Jazz P Bass's Avatar
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    Add a 2N to the schematic part number.
    Q112: 2N3904 small signal NPN
    Q113: 2N3906 small signal PNP

    RMX4050HD.zip

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    Due to the fact that these transistors are "very small" (I suppose the packages are SOT23 ), corresponding part numbers are MMBT3904 (or FMMT3904) and MMBT3906 (or FMMT3906).

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