Sony XR-C7500RX Operating Instructions Manual page 42

Error displays (when an optional CD/MD unit is connected)
The following indications will flash for about five seconds, and an alarm sound will be heard.
Display
NO Mag
NO Disc
NG Discs
Error
Blank
Push Reset
Not Ready
* The disc number of the disc causing the error appears in the display.
If the above-mentioned solutions do not help improve the situation, consult your nearest Sony
dealer.
42
Cause
The disc magazine is not inserted in
the CD/MD unit.
No disc is inserted in the CD/MD
unit.
A CD/MD cannot play because of
some problem.
A CD is dirty or inserted upside
down.*
An MD does not play because of some
problem.*
No tracks have been recorded on an
MD.*
The CD/MD unit cannot be operated
because of some problem.
The lid of the MD unit is open or MDs
are not inserted properly.
Solution
Insert the disc magazine in the CD/
MD unit.
Insert discs in the CD/MD unit.
Insert another CD/MD.
Clean or insert the CD correctly.
Insert another MD.
Play an MD with tracks recorded
on it.
Press the reset button of the unit.
Close the lid or insert the MDs
properly.