Maintenance - Sony MEX-BT3900U Operating Instructions Manual

• This unit supports security capabilities that
comply with the Bluetooth standard to provide a
secure connection when the Bluetooth wireless
technology is used, but security may not be
enough depending on the setting. Be careful when
communicating using Bluetooth wireless
technology.
• We do not take any responsibility for the leakage
of information during Bluetooth communication.
• Connection with all Bluetooth devices cannot be
guaranteed.
– A device featuring Bluetooth function is
required to conform to the Bluetooth standard
specified by Bluetooth SIG, and be
authenticated.
– Even if the connected device conforms to the
above mentioned Bluetooth standard, some
devices may not be connected or work correctly,
depending on the features or specifications of the
device.
– While talking on the phone hands free, noise
may occur, depending on the device or
communication environment.
• Depending on the device to be connected, it may
require some time to start communication.
Others
• Using the Bluetooth device may not function on
cellular phones, depending on radio wave
conditions and location where the equipment is
being used.
• If you experience discomfort after using the
Bluetooth device, stop using the Bluetooth device
immediately. Should any problem persist, consult
your nearest Sony dealer.
If you have any questions or problems concerning
your unit that are not covered in this manual, consult
your nearest Sony dealer.
34

Maintenance

Replacing the lithium battery of the
card remote commander
Under normal conditions, the battery will last
approximately 1 year. (The service life may be
shorter, depending on the conditions of use.)
When the battery becomes weak, the range of the
card remote commander becomes shorter.
Replace the battery with a new CR2025 lithium
battery. Use of any other battery may present a
risk of fire or explosion.
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2
1
Notes on the lithium battery
• Keep the lithium battery out of the reach of children.
Should the battery be swallowed, immediately
consult a doctor.
• Wipe the battery with a dry cloth to assure a good
contact.
• Be sure to observe the correct polarity when
installing the battery.
• Do not hold the battery with metallic tweezers,
otherwise a short-circuit may occur.
WARNING
Battery may explode if mistreated.
Do not recharge, disassemble, or dispose of
in fire.
Fuse replacement
When replacing the fuse, be
sure to use one matching the
amperage rating stated on the
original fuse. If the fuse blows,
check the power connection and
replace the fuse. If the fuse
blows again after replacement,
there may be an internal
malfunction. In such a case,
consult your nearest Sony
dealer.
+ side up
Fuse (10 A)