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Peavey PV8.5C AC (mains input) board wiring

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  • Peavey PV8.5C AC (mains input) board wiring

    Dear everyone,

    I need some help with wiring this power amplifier. I burned it out some time ago, and had to replace pretty much the whole output stage.to get clean access to that, i had to disassemble the mains input board, and I did a grave mistake of not photographing it. So, long story short, I have no idea how to connect it again. :/

    AC board is a PCB with one large resistor, one capacitor, one fuse, and a lot of spade connectors. Things that need to be connected to the AC board: main transformer, power switch, circuit breaker, ventilator (230 VAC), and, of course, two mains input wires. I am attaching the service manual, with the schematic and layout of the AC board shown on pages 7 and 8.

    I tried to connect this a few times on my own, but with no success. Most of the times I just couldn't get anything working. once, I managed to turn only the ventilator on, once only the amplifier, and once i burned out some of the transistors in the amplifier. So now I'm asking if anyone with a bit more experience and knowledge can help me connect this the way it's meant to be connected.

    Thanks in advance.
    Regards, Z.
    Attached Files

  • #2
    You have to identify the power transformers windings.
    The schematic does not indicate this!
    If you cannot identify the primary side from the secondary, take it to a tech that can.
    Once that is sorted out, the schematic must be followed for the 220V wiring.

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    • #3
      I have identified the transformer windings, but I'm having trouble figuring out where on the mains input board should i plug the primary winding. As far as I can see, there is nothing in the schematics what could tell me how I should connect that stuff. So basically, I now have a completely unplugged AC board, a power switch, a circuit breaker, a ventilator, and a power transformer primary winding, each of them identified, and I have no idea where on the AC board should I plug everything.

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      • #4
        Try contacting tech support at Peavey.
        If they have any documentation they will provide it.
        I see nothing on the schematic that indicates precisely what you need to know.
        Without the unit in front of me it is rather confusing to say the least.

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        • #5
          I responded to this at the PV forum. You need a mains wiring diagram (different from a schematic). The schematic sets for this series of amp do not include mains wiring.
          Education is what you're left with after you have forgotten what you have learned.

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