Sony CMT-DH7BT - Manual (Page 72)

CMT-DH7BT.GB.3-097-195-11(2)
 GB
If the system still does not operate
properly after performing the
above measures or other troubles
not described above occur, reset the
system as follows:
Use buttons on the unit to reset the
system to its factory default settings.
1
Unplug the power cord.
2
Plug the power cord back in.
3
Press   to turn on the system.
4
Press   , DISPLAY  and  
at the same time.
“RESET” appears in the display.
The system is reset to the factory settings
except for DVD settings. You should set
the settings you made, such as the preset
stations, clock and timer.
To return the DVD setup to the default
settings*, perform reset as follows:
1
Press DISPLAY  when playback
is stopped.
The Control Menu appears on the TV
screen.
2
Press  or   repeatedly to
select (SETUP), then press
ENTER  .
3
Press  or   repeatedly to select
“RESET,” then press ENTER  .
4
Press  or   repeatedly to select
“YES,” then press ENTER  .
It takes a few seconds to complete. Do
not press   when resetting the
system.
* Except for Parental Control settings
Self-diagnosis Function
(When letters/numbers appear in the
display)
When the self-diagnosis function
is activated to prevent the system
from malfunctioning, a 5-character
service number (e.g. C 13 50) with a
combination of a letter and 4 digits
appears on the TV screen and the front
panel display. In this case, check the
following table.
First 
characters of
the service
number
Cause and corrective
action
C 13 This disc is dirty.
 Clean the disc with a
soft cloth (page 75).
C 31 The disc is not inserted
correctly.
 Restart the system,
then re-insert the
disc correctly.
E XX
(XX is a
number)
To prevent a
malfunction, the
system 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