Sony NV-U70 Quick Start Guide - Page 21

Troubleshooting The following checklist will help you remedy problems you may encounter with your unit. Before going through the checklist below, check the connection and operating procedures. The operation icons on the display do not function. An operation may take time while a map is displayed. The unit does not turn on. t Check that the POWER switch on the bottom right of the unit is in the ON position. t Charge the built-in battery (page 8). t Check that the unit is securely attached to the cradle (page 8). The built-in battery cannot be charged. t Check that the POWER switch on the bottom right of the unit is in the ON position. t If the AC power adapter is being used, disconnect it from the outlet, then reconnect. t The built-in lithium-ion battery can be charged at temperatures between 5 - 45 ºC (41 - 113 ºF). The battery may not be charged if the temperature inside the unit increases because of direct sunlight exposure, etc. This is not a malfunction. GPS signal cannot be received. • The system cannot receive GPS signals due to an obstruction. t Move your car to a place where signals can be received clearly. • GPS signal reception is low. t Check the GPS information. t The optional External GPS Antenna VCA-41 may be required for a heated or heat reflective windshield. • There is an obstacle in front of the GPS antenna. t Install the unit where the signal is not interrupted by the body of the car, etc. For details on the unit installation, see "Mounting location" on page 5. • Signal may not be received if a window film is attached. In that case, use the optional External GPS Antenna VCA-41. The car position on the map does not match the current road. The error margin of the signal from the GPS satellites is too large. A maximum error margin of a few hundred meters can exist. Voice guidance cannot be heard. The volume is set too low. t Raise the volume in the setting menu (page 17). When the unit is powered by the built-in battery, maximum available volume is 70 %, even if set higher (80 %, etc). The LCD is not displayed normally. • In high temperatures, the LCD may darken and not display clearly. In low temperatures, afterimage may occur on the LCD. These are not malfunctions, and the LCD will return to normal when the temperature returns to within the specified operating range. • The LCD is dark, or the map color has changed. t The auto dimmer function may be activated because its sensor (page 11) is covered by a hand, etc. Resetting the unit If the navigation software freezes, try resetting the unit. Press the RESET button with a pointed object, such as a ball-point pen. If the problem persists, switch off the main power by sliding the POWER switch to the OFF position, then switch on again after approximately 10 seconds. POWER OFF ON RESET button RESET CHG OPFOFWEORN Note After you switch off the main power, it may take time to receive GPS signals when switching on again. 21