English | 3Installation Procedure1. To prevent a short circuit, remove the key from theignition and disconnect the - battery.2. Make the proper input and output wireconnections for each unit.3. Connect the speaker wires of the wiring harness.4. Connect the wiring harness wires in the followingorder: ground, battery, ignition.5. Connect the wiring harness connector to the unit.6. Install the unit in your car.7. Reconnect the - battery.8. Press the reset button.2WARNING• If you connect the ignition wire (red) and the battery wire(yellow) to the car chassis (ground), you may cause a shortcircuit, that in turn may start a fire. Always connect thosewires to the power source running through the fuse box.Acquiring GPS SignalsThe first time you turn on the DNX5120/DNX512EX,you must wait while the system acquires satellitesignals for the first time. This process could take up toseveral minutes. Make sure your vehicle is outdoorsin an open area away from tall buildings and trees forfastest acquisition. After the system acquires satellitesfor the first time, it will acquire satellites quickly eachtime thereafter.¤• Mounting and wiring this product requires skills andexperience. For safety’s sake, leave the mounting and wiringwork to professionals.• Make sure to ground the unit to a negative 12V DC powersupply.• Do not install the unit in a spot exposed to direct sunlightor excessive heat or humidity. Also avoid places with toomuch dust or the possibility of water splashing.• Do not use your own screws. Use only the screws provided.If you use the wrong screws, you could damage the unit.• If the power is not turned ON (“PROTECT” is displayed),the speaker wire may have a short-circuit or touched thechassis of the vehicle and the protection function mayhave been activated. Therefore, the speaker wire should bechecked.• If your car’s ignition does not have an ACC position, connectthe ignition wires to a power source that can be turned onand off with the ignition key. If you connect the ignitionwire to a power source with a constant voltage supply, aswith battery wires, the battery may die.• If the console has a lid, make sure to install the unit so thatthe faceplate will not hit the lid when closing and opening.• If the fuse blows, first make sure the wires aren’t touchingto cause a short circuit, then replace the old fuse with onewith the same rating.• Insulate unconnected wires with vinyl tape or other similarmaterial. To prevent a short circuit, do not remove the capson the ends of the unconnected wires or the terminals.• Connect the speaker wires correctly to the terminals towhich they correspond. The unit may be damaged or fail towork if you share the - wires or ground them to any metalpart in the car.• When only two speakers are being connected to thesystem, connect the connectors either to both the frontoutput terminals or to both the rear output terminals (donot mix front and rear). For example, if you connect the +connector of the left speaker to a front output terminal, donot connect the - connector to a rear output terminal.• After the unit is installed, check whether the brake lamps,blinkers, wipers, etc. on the car are working properly.• Mount the unit so that the mounting angle is 30° or less.• This unit has the cooling fan (page 5) to decrease theinternal temperature. Do not mount the unit in a placewhere the cooling fan of the unit are blocked. Blockingthese openings will inhibit the cooling of the internaltemperature and result in malfunction.• Do not press hard on the panel surface when installing theunit to the vehicle. Otherwise scars, damage, or failure mayresult.