Troubleshooting Guide - Sony MDX-C7900R Operating Instructions Manual

Troubleshooting guide

The following checklist will help you remedy the problems you may encounter with your unit.
Before going through the checklist below, check the connection and operating procedures.
General
Problem
No sound.
The contents of the memory
have been erased.
Indications do not appear in the
display.
No beep tone.
EN
CD/MD playback
Problem
A disc cannot be loaded.
Playback does not begin.
The operation buttons do not
function.
The sound skips due to
vibration.
Radio reception
Problem
Preset tuning is not possible.
Automatic tuning is not
possible.
The "ST" indication flashes.
26
Cause/Solution
•Cancel the ATT function.
•Set the fader control to the centre position for two-speaker
systems.
•Rotate the dial in a clockwise direction to adjust the volume.
• The power cord or battery has been disconnected.
• The reset button has been pressed.
n Store again into the memory.
Remove the front panel and clean the connectors. See "Cleaning
the connectors" (page 24) for details.
• The beep tone is attenuated (page 17).
Cause/Solution
• Another MD is already loaded.
• The MD is forcibly inserted upside down or in the wrong way.
Defective MD or dusty CD.
Press the reset button.
• The unit is installed at an angle of more than 20°.
• The unit is not installed in a sturdy part of the car.
Cause/Solution
• Memorise the correct frequency.
• The broadcast signal is too weak.
The broadcast signal is too weak.
n Use manual tuning.
• Tune in the frequency accurately.
• The broadcast signal is too weak.
n Set to the MONO mode (page 10).