MM15 Moving Magnet Preamplifier Module Installation Instructions

  • Contents

    • Installation

    1 Requirements

    To follow these installation instructions you will need:

    • #10 Torx Screwdriver
    • Flush diagonal wire cutters
    • Static-free working area
    • Anti-static wrist strap

    2 Remove power

    • Unplug the mains connector from the back of the I15.

    This is important as there are dangerous voltage levels accessible inside the I15.

    3 Remove the I15 case

    • Remove the 8 Torx screws securing the top of the I15 case.
    • Lift off the case and put it to one side.
    • Position the I15 with the front panel facing you.
    • Attach the anti-static wrist strap to your wrist and attach the grounding cable to the I15 case.

    4 Cut the line level links

    • Locate the three wire links labelled JP1, JP2, and JP3 at the top right-hand corner of the I15 circuit board.
    • Snip through the centre of each of the wire links, and bend the ends slightly apart so there’s no danger of them making contact.

    This disconnects the original line-level input from the A1 source.

    It’s a good idea to leave the wires in place, rather than removing them completely, so that if you want to remove the MM15 board at a later date you can reinstate the line-level input by adding a blob of solder to each link.

    5 Change the RIAA setting

    A shorting block on the board should be moved to add RIAA equalisation for the phono input. The position of the block depends on whether the board is VM2 or VM1:

    VM2 board

    • Locate the jumper block:

    • Move the shorting block from the upper position to the lower position:

    VM1 board

    • Locate the jumper block, to the left of the MM15 board position:

    • Move the shorting block from the upper position to the lower position:

    5 Install the MM15 board

    • Unpack the MM15 board and mounting screws from the protective packaging.
    • Place it in position so the two header sockets on the MM15 board mate with the header plugs on the I15 board (see previous diagram).
    • Press firmly on the two header sockets so that the board is fully located in position.

    • Secure the MM15 board by inserting the four Posidriv screws supplied with the MM15 board into the tapped pillars at each corner of the board.

    6 Replace the I15 case

    • Replace the I15 case and secure it with the 8 Torx screws.
    • Check that the MM15 board has been recognised by confirming that the label of the A1 source has now changed to PHONO.

     

    Printing or saving as PDF

    You can print an on-line Primare user guide from your web browser, to provide you with a permanent copy to refer to away from your computer.

    Alternatively, you can save a user guide as PDF files, to refer to when are you not connected to the internet.

    To do so, simply choose Print, or Print followed by Save as PDF, from your browser’s File menu.

    For the specific procedure for each of the most popular web browsers see How do I print or save a PDF copy of the on-user guides?.

    Translate

    You can use Google Translate to translate the contents of the Primare website. To do that, select the language you would like to translate into in the list below.

    Please bear in mind, since the Google Translate is an automatically generated translation, we do not take any responsibility for errors in the text.