27Dismantling / Jumper SettingsPlease note:In the following, the internal settings of the HPA US 4+ are discussed.For changing these, a TORX T10 screwdriver is required and you should by all meansPULL THE MAINS PLUG !!!Only thereafter the settings can be altered without any hazard.Dismantling1. Remove the magnetic covers from both sides - this is best done from behind2. Screw off both upper screws from the back plane and2 x 3 screws from the left and right side of the upper lid3. The lids are situated in a groove of the front panel.Lift the upper lid from the back end and slide it back some millimeters to remove it4. Now lift the upper lid5. Make your personal jumper settings6. Reassemble the unit in reverse order