Sony CDX-M730 Primary User Manual - Page 25

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 (VOL) (+) to adjust the volume. • Cancel the ATT function. • Set the fader control to the center position for a 2-speaker system. The contents of the memory have been erased. • The RESET button has been pressed. t 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 canceled (page 18). 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" on page 21. 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 antenna does not extend. The power antenna does not have a relay box. CD/MD playback A disc cannot be loaded. • Another CD is already loaded. • The CD is forcibly inserted upside down or in the wrong way. Playback does not begin. • Defective MD or dirty CD. • CD-R/CD-RW that is not finalized. • You tried to playback a CD-R/CD-RW not designed for audio use. • Some CD-Rs/CD-RWs may not play due to its recording equipment or the disc condition. A disc is automatically ejected. The ambient temperature exceeds 50°C (122°F). The operation buttons do not function. CD will not be ejected. Press the RESET button. The sound skips from vibration. • The unit is installed at an angle of more than 60°. • 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 may be in 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. The stations cannot be received. The sound is hampered by noises. • Connect a power antenna control lead (blue) or accessory power supply lead (red) to the power supply lead of the car's antenna booster. (Only if your car has a built-in FM/ AM antenna in the rear/side glass.) • Check the connection of the car antenna. • The auto antenna will not go up. t Check the connection of the power antenna control lead. • Check the frequency. • When the DSO mode is on, the sound is sometimes hampered by noises. t Set the DSO mode to off (page 20) continue to next page t 25