Sony CDX-6500/4500 Operating Instructions Manual page 15

Error displays
The following indications will flash for about five seconds.
Display Cause
A CD is dirty or inserted upside
down.
The CD player cannot be operated
because of some problem.
If the above-mentioned solutions do not help improve the situation, consult your nearest Sony
dealer.
Solution
Clean or insert the CD correctly.
Press the reset button or 6 .
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