4 | KDC-BT51U/ KDC-5751SD/ KDC-5051UBefore useBefore using this unit for the first timeThis unit is initially set on the Demonstration mode.When using this unit for the first time, cancel theDemonstration mode. Refer to Mode> (page 4) of Quick start guide.2 WARNINGTo prevent injury or fire, take the followingprecautions:• Stop the car before operating the unit.• To prevent a short circuit, never put or leave anymetallic objects (such as coins or metal tools) insidethe unit.¤ CAUTION• Adjust the volume so that you can hear soundsoutside the car. Driving with the volume too highmay cause an accident.• Wipe off the dirt on the panel with a dry silicon orsoft cloth.Failure to observe this precaution may result indamage to the monitor or unit.”Cleaning the connectorWipe off dirt on the connector of the unit and panel.Use a cotton swab or clothCondensationWhen the car is air-conditioned, moisture may collecton the laser lens. This may cause disc read errors. Inthis case, remove the disc and wait for the moistureto evaporate.Notes• If you experience problems during installation,consult your Kenwood dealer.• When you purchase optional accessories, check withyour Kenwood dealer to make sure that they workwith your model and in your area.• Characters that conform to ISO 8859-1 can bedisplayed.• Characters that conform to ISO 8859-5 or ISO 8859-1 can be displayed. Refer to “Russian” of setting> (page 31).• The Radio data system feature won’t work wherethe service is not supported by any broadcastingstation.• The illustrations of the display and the panelappearing in this manual are examples used toexplain more clearly how the controls are used.Therefore, what appears on the display in theillustrations may differ from what appears on thedisplay on the actual equipment, and some of theillustrations on the display may be inapplicable.About discs used with this unit• This unit can only play the CDs with .• The following discs cannot be used:- Discs that are not round- Discs with coloring on the recording surface ordiscs that are dirty- Recordable/Rewritable disc that has not beenfinalized (For the finalization process, refer toyour disc writing software, and your disc recorderinstruction manual.)- 8 cm (3 inch) disc (Attempt to insert using anadapter can cause malfunction.)Handling discs• Do not touch the recording surface of the disc.• Do not stick tape etc. on the disc, or use a disc withtape stuck on it.• Do not use any accessories for the disc.• Do not use any solvents to clean discs. Use a drysilicon or soft cloth.• Clean from the center of the disc and moveoutward.• When removing discs from this unit, pull them outhorizontally.• Remove the rims from the center hole and discedge before inserting a disc.How to reset your unitIf the unit fails to operate properly, press the Resetbutton. The unit returns to factory settings when theReset button is pressed.Reset button