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Sony XAV-7W Manual

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49
Troubleshooting
When there seems to be a problem with the
unit, check the following points first. For
more details on optional units, please refer to
supplied instruction manual of each pruduct.
If the problem persists, there may be a
connection fault, or the unit may be defective.
In such a case, contact the Technical
Information Center, your dealer, or the
nearest Sony service center.
General
No sound.
, Raise the volume.
, Cancel the ATT function.
, Check the speaker output settings.
, When only 2 speakers are used, set the
fader fully to the front or rear.
The contents of the memory were
lost.
, The reset button was pressed.
, The battery lead or battery was
disconnected.
, Power supply wiring is not connected
correctly.
No beep sound when controls are
operated.
, The beep sound was turned off.
, Set “Beep” (page 41) to “on”.
, An optional power amplifier is connected
and you are not using the built-in amplifier.
Nothing is shown in the display
window.
, The clock display was turned off by
pressing OFF for 2 seconds.
, Press SOURCE.
, Check the “Video Mix Play” setting.
Power does not come on.
, Power supply wiring is not connected
correctly.
, Check the connection. If everything is in
order, check the fuse.
, The unit is installed in a car without ACC
position of the ignition key.
, Press SOURCE.
Power does not go off.
, The unit is installed in a car without ACC
position of the ignition key.
, Press OFF for more than 2 seconds.
Stored stations and correct time
are erased.
, The fuse has blown.
Makes noise when the ignition key
is in the ON, ACC, or OFF position.
, The leads are not matched correctly with
the car's accessory power connector.
“ATT” appears in the display, and
volume is reduced.
, The telephone ATT control lead is shorting
on a metal part of the car.
, Insulate any exposed wires with
electrical tape to avoid any short circuit.
Noise is heard.
, Keep aerial cable, bus cable, and audio
cables as far away as possible from power
supply wiring.
Power aerial does not extend.
, The power aerial does not have a relay box.
Controls have no effect.
, Press the Reset button.
No response when pressing the
buttons on the card remote
commander.
, The card remote commander battery maybe
exhausted.
No picture, or no sound when you
connect the optional equipment.
, The cord has been disconnected.
Connect the cord securely.
Cannot select “VIDEO1” and
“VIDEO2”.
, Check connection of the connection box.
, Check if connections are made correctly.
, If “Aux-Video” is set to “off”, “VIDEO1”
and “VIDEO2” cannot be selected.
, Set “Aux-Video” to “on” (page 41).
… 49 …


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