MDS-JE320 - Sony Audio Service Manual (repair manual). Page 4

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The self-diagnosis function consists of error codes for users which are displayed automatically when errors occur, and error codes which show the error
history in the test mode during servicing.For detail on how to view error codes for users, refer to the following box in the instruction manual.

The deck has a self-diagnosis display.  This function shows a three-digit display (a combination of a letter and figures)
and the corresponding message alternately, so you can check the deck’s condition. If such a display appears, check the

following table in order to resolve the problem. Should any problem persist, consult your nearest Sony dealer.

C11/Protected

The inserted MD is record-protected.
/Take out the MD, and close the record-protect tab (page 9.)

C13/REC Error

The recording was not made properly.
/Set the deck in a stable place, and repeat the recording procedure.

The inserted MD is dirty (with smudges, fingerprints, etc.) scratched, or not up to standards.
/Replace the disc, and repeat the recording procedure.

C13/Disc Error

The deck could not read the TOC of the MD properly.
/Take out the MD, and insert it again.

C14/Disc Error

The deck could not read the TOC of the MD properly.
/Insert another disc.
/If possible, erase all tracks on the MD using the All Erase Function on page 28.

C71/Din Unlock

A moment’s lighting is due to the signals of the digital program being recorded.
This does not affect the recorded material.

While recording from a digital component connected through the digital input connector,
the digital connecting cable was unplugged or the digital component turned off.
/Connect the cable or turn the digital component back on.

C11

Protected

Self-diagnosis display