Sony XAV-77 User Manual download pdf (Page 49)

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 product.

If the problem persists, there may be a

connection fault, or the unit may be defective.

In such a case, contact 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 down OFF.

, 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 down OFF until the display

disappears.

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 antenna cable, bus cable, and audio

cables as far away as possible from power

supply wiring.

Power antenna does not extend.

, The power antenna 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.

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