MX-M260/M310/M260N/M310N  SELF DIAG AND TROUBLE CODE 7 - 11
EE EL Content Developer adjustment trouble (Over-toned 
abnormality)
Details An abnormality occurred in execution of 
automatic developer adjustment.
Sample data was detected over-toner.
Cause Toner concentration sensor abnormality.
Toner concentration trouble.
Developing unit trouble.
MCU PWB failure.
Check 
and 
remedy
Use SIM 25-2 to perform the auto 
developer adjustment.
EU Content Developer adjustment trouble (Under-
toned abnormality)
Details An abnormality occurred in execution of 
automatic developer adjustment.
Sample data was detected under-toner.
Cause Toner concentration sensor abnormality.
Toner concentration trouble.
Developing unit trouble.
MCU PWB failure.
Check 
and 
remedy
Use SIM 25-2 to perform the auto 
developer adjustment.
PF 00 Content PF trouble
Details The copy inhibit command from RIC is 
received.
Cause Judged by the host.
Check 
and 
remedy
Inform to the host.
Trouble 
code
Details of trouble
Main 
code
Sub 
code