CM6631A USB Module Installation Guide for Burson Conductor SL Remove the 8 screws that held the top half of the enclosure (3 on each side and 2 on the back).
Remove the 4 screws that held the DAC PCB. Then remove the DAC PCB from the unit.
Remove the one bolt that secured the USB module.
Use your finger to push the USB module towards the inside of the unit.
One of the pin connector (highlighted in blue) on the back will be slightly bent, but that is ok.
Install the new module, align all 4connection pins correctly and you are done. Reverse the previous steps to restore the DAC PCB and the unit cover.