Sony CDX-7520 - Manual (Page 20)

Troubleshooting Guide
The following checks will assist in the conecllon ot most problems
which you may encounter with your unit.
Before going through the check list below, first refer back to the
conrrection and operating procedures.
CD player section
iNwble
Play does not begin. • The unit is in the pause mode Press ► II.
• Dusty or defective disc
• The ambient temperature is more than 50“C (120^
Disc cannot be loaded or the disc is
automatically ^ected. • A disc is already loaded.
• The disc is inserted with the label surface downwards.
The operation buttons do not work. The built-in microprocessor malfunctions. Press the
res^ button.
The sound skips due to vibration • The unit is installed at an angle of more than 20°.
• The unit is not installed on the sturdy part of a car.
• Dusty or defective disc
Tuner section
1Nxi>ie
Preset tuning is not possible. • Memorize the correct frequency.
• The broadcast is weak. Use manual tuning.
Automatic tuning is not possibla The broadcast is weak. Use manual tuning.
The STEREO indicator flickers. • Tune in precisely.
• The broadcast is weak. Pré» the SENS button to
display the MONO indicator.
About the error code
The following codes flicker for about five seconds.
Ënor code
;V;,, ^ .
E-04 The disc is dirty or inserted upside-down. (In this case, the
disc will be ejected automatically.) • Clean the disc.
• Insert the disc correctly-
E-66 A CD-ROM disc is inserted. Remove the disc
E-77 The temperature is too high and the protection circuit has
been activated. Wait until the unit cools
off.
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