Troubleshooting - JVC KW-M450BT Instruction Manual

References References
Notes on using a USB device
• Avoid using the USB device if it might affect driving
safety.
• When connecting with a USB cable, use a USB 2.0
cable.
• Electrostatic shock at connecting a USB device may
cause abnormal playback of the device. In this case,
try one of the following:
– disconnect the USB device, then reconnect the USB
device.
– turn the power off and on or turn the car's ignition
off and on.
• Do not pull out and connect the USB device
repeatedly while "Reading" is shown on the screen.
• Operation and power supply may not work as
intended for some USB devices.
• Do not leave a USB device in the car, or expose to
direct sunlight or high temperatures to prevent
deformation or damage to the device.
Unplayable USB device
• This unit may not play back files in a USB device
properly when using a USB extension cable.
• USB devices equipped with special functions such as
data security functions cannot be used with the unit.
• Do not use a USB device with 2 or more partitions.
• Depending on the shape of the USB devices and
connection ports, some USB devices may not be
attached properly or the connection might be loose.
• This unit may not recognize a memory card inserted
into a USB card reader.
About iPod/iPhone
Important
Make sure all important data has been backed up to
avoid losing the data.
We bear no responsibility for any loss of data stored in
the devices while using this unit.
Made for
iPhone 8, 8 Plus, X, XS, XS (MAX), XR
Notes on using an iPod/iPhone
• When operating an iPod/iPhone, some operations
may not be performed correctly or as intended. In
this case, visit the following JVC web site:
<http://www.jvc.net/cs/car/>
• When you turn on this unit, the iPod/iPhone is
charged through the unit.
• The text information may not be displayed correctly.
• For some iPod/iPhone models, the performance may
be abnormal or unstable during operation. In this
case, disconnect the iPod/iPhone device, then check
its condition.
If the performance is not improved or slow, reset
your iPod/iPhone.

Troubleshooting

Troubleshooting
What appears to be trouble is not always serious.
Check the following points before calling a service
center.
• For operations with external components, refer also
to the instructions supplied with the adapters used
for connection (as well as the instructions supplied
with the external components).
General
No sound comes out of the speakers.
 Adjust the volume to the optimum level. 
 Check the cords and connections. 
No picture is displayed on the screen.
 Turn on the screen. (Page 4) 
The remote controller* does not work.
 Replace the battery. 
"No Signal"/"No Video Signal" appears.
 Start playback on the external component 
connected to the AV-IN input terminal.
 Check the cords and connections. 
 Signal input is too weak. 
"Miswiring DC Offset Error"/"Warning DC Offset
Error" appears.
 A speaker cord has shorted or it has come into 
contact with the car chassis. Wire or insulate the
speaker cord as appropriate, then turn the power
off and on.
ENGLISH 47