CMT-M373NT, HCD-M373 - Sony Audio Service Manual (repair manual). Page 4

4

This system has a Self-diagnosis display 
function to let you know if there is a system 
malfunction. The display shows a code made up 
of three or five letters and a message alternately 
to show you the problem. To solve the problem 
refer to the following list. If any problem 
persists, consult your nearest Sony dealer. 

The MD is protected against erasure.

c Remove the MD and slide the tab to close the slot 

(page 15).

You tried to record a CD with a format that the 
system does not support, such as a CD-ROM.

c Remove the disc and turn off the system once, 

then turn it on again.

Recording could not be performed properly.

c Move the system to a stable place, and start 

recording over from the beginning.

The MD is dirty or scratched, or the MD does not 
meet the standards.

c Replace the MD and start recording over from the 

beginning.

The MD deck cannot read the disc information 
properly.

c Remove the MD once, then insert it again.

The MD deck cannot read the disc information 
properly.

c Replace the MD.

c Erase all the recorded contents of the MD using 

the All Erase Function (page 29).

The sound source is a copy of a commercially 
available music software or CD-R.

cThe Serial Copy Management System prevents 

making a digital copy (page 64). In addition, you 
cannot copy from a CD-R.

No component is connected to the DIGITAL 
OPTICAL IN jack, or you tried to record from th e 
digital component which is not connected correctly. 

cConnect the optional digital component correctly 

to the DIGITAL OPTICAL IN jack using the 
digital optical cable (not supplied) (page 52).

The power of the connected component is not turned 
on.

cCheck if the power of the connected digital 

component is on. Refer to the operating 
instructions supplied with the component.

The digital optical cable is disconnected, or the 
power of the connected component is turned off 
while recording the digital audio from the 
component connected to the DIGITAL OPTICAL 
IN jack.

cConnect the digital optical cable, or turn on the 

power of the connected component.

The component has internal problem.

cConsult your nearest Sony dealer.

There is a problem with the laser pickup.

cThe laser pickup may be damaged. Consult your 

nearest Sony dealer.

There is a problem with loading.

cConsult your nearest Sony dealer.