4 | KDC-BT73DAB/ KDC-BT53U/ KDC-5057SD English | 5

1. Before use

1-1. Safety precaution

# WARNING
To prevent injuries or a fire, take the following
precautions:
•Stop the car before operating the unit.
•To prevent a short circuit, never put or leave any
metallic objects (such as coins or metal tools) inside
the unit.
! CAUTION
•Adjust the volume so that you can hear the sound
outside the car. Driving with the volume too high
may cause an accident.
•Wipe off the dir t on the panel with a dry silicon or
soft cloth.
Failure to observe this precaution may result in
damage to the monitor or unit.
•I f you experience problems during installation,
consult your Kenwood dealer.

1-2. Important information

Before using the this unit for the first time
This unit is factory-set to operate in the
Demonstration mode initially.
When using this unit for the first time, cancel
the Demonstration mode. Refer to <Cancel the
Demonstration mode> (page 13).
Cleaning the connector
The unit may not function properly if the connectors
between the unit and faceplate are dirty. Detach the
faceplate and clean the connector with a cotton swab
gently, being careful not to damage the connector.
Condensation
When the car is air-conditioned, moisture may collect
on the laser lens. This may cause disc read errors. In
this case, remove the disc and wait for the moisture
to evaporate.
How to reset your unit
If the unit fails to operate properly, press the Reset
button. The unit returns to the factory settings when
the Reset button is pressed.
Notes
•When you purchase optional accessories, check with
your Kenwood dealer to make sure that they can
work with your model and in your area.
•Charac ters that conform to ISO 8859-1 can be
displayed.
•Charac ters that conform to ISO 8859-5 or ISO 8859-1
can be displayed. Refer to “Russian” of <12-7. Initial
settings> (page 61).
•The illustrations of the display and panel appearing
in this manual are examples used to explain more
clearly how the controls are used. Therefore, what
appears on the display in the illustrations may differ
from what appears on the display on the actual
equipment, and some of the images on the display
may be inapplicable.
•USB rating is indicated on the main unit under the
detachable faceplate.