User manual KENWOOD DNX521VBT

[. . . ] Do not mount the unit in a place where the cooling fan of the unit are blocked. Do not press hard on the panel surface when installing the unit to the vehicle. Otherwise scars, damage, or failure may result. Reception may drop if there are metal objects near the Bluetooth antenna. [. . . ] Always connect those wires to the power source running through the fuse box. The first time you turn on the DNX521VBT/DNX5220, you must wait while the system acquires satellite signals for the first time. This process could take up to several minutes. Make sure your vehicle is outdoors in an open area away from tall buildings and trees for fastest acquisition. After the system acquires satellites for the first time, it will acquire satellites quickly each time thereafter. For safety's sake, leave the mounting and wiring work to professionals. Make sure to ground the unit to a negative 12V DC power supply. Do not install the unit in a spot exposed to direct sunlight or excessive heat or humidity. Also avoid places with too much dust or the possibility of water splashing. 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 the chassis of the vehicle and the protection function may have been activated. Make sure that the unit is installed securely in place. If the unit is unstable, it may malfunction (eg, the sound may skip). It should be installed as horizontally as possible to allow easy reception of the GPS satellite signals. to mount the GPS antenna inside your vehicle: 1. Peel the backing off of the adhesive on the bottom of the metal plate (Accessory 4). Press the metal plate (Accessory 4) down firmly on your dashboard or other mounting surface. Remove oil and other dirt from the installation surface. Wire the microphone cable up to the hands-free box with it secured at several positions using tape or the like. Fix a cable with a commercial item of tape. Depending on the type of car, reception of the GPS satellite signals might not be possible with an inside installation. The GPS antenna should be installed at a position that is spaced at least 12 inch (30 cm) from cellular phone or other transmitting antennas. [. . . ] The GPS antenna should be installed at a position that is spaced at least 12 inch (30 cm) from cellular phone or other transmitting antennas. Signals from the GPS satellite may be interfered with by these types of communication. Painting the GPS antenna with (metallic) paint may cause a drop in performance. Peel the release coated paper of double-face adhesive tape to fix on the place shown in the left-hand example. [. . . ]