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Sony cdx-m770 Manual

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39
Troubleshooting
The following checklist will help you remedy
problems you may encounter with your unit.
Before going through the checklist below, check
the connection and operating procedures.
General
No sound.
• Press the (+) side of (VOL) to adjust the
volume.
• Cancel the ATT function.
• Set the fader control to the centre position for
a 2-speaker system.
The message “LP” appears in the display.
MDLP tracks cannot be played back. (MDX-
M690 only)
An optional MD unit does not conform to
MDLP play back.
t Use this unit to playback the MDLP tracks.
The contents of the memory have been
erased.
• The reset button has been pressed.
• Store again into the memory.
• The power cord or battery has been
disconnected.
• The power connecting cord is not connected
properly.
No beep sound.
The beep sound is cancelled (page 34).
Indications disappear from/do not appear in
the display.
• The clock display disappears if you press
(OFF) for 2 seconds.
t Press (OFF) again for 2 seconds to
display the clock.
• Remove the front panel and clean the
connectors. See “Cleaning the connectors”
(page 36) for details.
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.
No power is being supplied to the unit.
• Check the connection. If everything is in
order, check the fuse.
• The car does not have an ACC position.
t Press (SOURCE) (or insert a disc) to turn
on the unit.
The power is continuously supplied to the
unit.
The car does not have an ACC position.
The power aerial does not extend.
The power aerial does not have a relay box.
The rotary commander RM-X5S cannot be
operated.
Rotate the dial at the bottom of the rotary
commander until it can be operated.
CD/MD playback
A disc cannot be loaded.
• Another CD/MD is already loaded.
• The CD/MD is forcibly inserted upside down
or in the wrong way.
Playback does not begin.
• Dirty or defective disc.
• CD-R that is not finalized, or a CD-RW.
• You tried to playback a CD-R not designed
for audio use.
• Some CD-Rs may not play due to its
recording equipment or the disc condition.
A disc is automatically ejected.
The ambient temperature exceeds 50°C.
CD will not be ejected.
The operation buttons do not function.
Press the reset button.
The sound skips from vibration.
• (CDX-M770, CDX-M670)
The unit is installed at an angle of more than
60°.
(MDX-M690)
The unit is installed at an angle of more than
20°.
• The unit is not installed in a sturdy part of
the car.
The sound skips.
Dirty or defective disc.
Cannot turn off the “--------” indication.
You entered the name edit mode.
t Press (LIST) for 2 seconds.
Radio reception
Preset tuning is not possible.
• Store the correct frequency in the memory.
• The broadcast signal is too weak.
continue to next page t
… 39 …


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