Troubleshooting Guide - Sony MDX-C7900 Operating Instructions Manual

Troubleshooting guide

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
Problem
No sound
The contents of the memory
have been erased.
Indications do not appear in the
display.
No beep tone
CD/MD playback
Problem
A disc cannot be loaded.
Play 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.
Cause/Solution
•Rotate the dial in a clockwise direction to adjust the volume.
•Set the fader control to the center position for two-speaker
systems.
• 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 19) for details.
• The beep tone is attenuated (page 13).
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
• Store the correct frequency in the memory.
• The broadcast signal is too weak.
The broadcast signal is too weak.
n Use manual tuning.
•Tune in the frequency precisely.
•The broadcast signal is too weak.
n Set to the MONO mode (page 10).
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