Sony DVP-NS725P Operating Instructions Manual page 66

Thedisc traydoes notope nand"LOCKED"
appears on the frontpanel display.
'_ Child Lock is set (page 27).
The disc tray does not open and "TRAY
LOCKED"appearson the front panel
display.
i_ Contact your Sony dealer or loca!
authorized Sony service facility.
"Data error"appears ontheTVscreen
when playing a DATACD.
'_ The MP3 audio track you want to play is
broken.
'_ The data is not MPEGI Audio Layer 3 data.
Self-diagnosisFunction
(When letters/numbersappear in the
display)
When the self-diagnosis function is activated
to prevent the player from malfunctioning, a
five-characler service number (e.g,, C 13 50)
with a combination of a letter and four digits
appears on the screen and the front panel
display. In this case, check the following
table.
;cit?&o#
First three
characters of
the service
number
C 13 The disc is dirty.
"_ Clean the disc with a soft
cloth (page 7).
C 31 The disc is not inserted
correctly.
Re-insert the disc
correctly.
E XX TO prevent a malfunction, the
(xx is a number) player has performed the
self-diagnosis function,
Contact your nearest
Sony dealer or local
authorized Sony service
facility and give the 5-
character service number.
Example: E 61 10
Cause and/or corrective
action
66