Description: A clock error correction error with an option unit (which does not occur with the printer in the factory shipped configuration)
Remedy: Does the error occur again? Does the error occur again? Be sure of connector contacts. Replace the option unit.
Code: 933
Display: POWER OFF/ON 933:ERROR
Description: Tray-2 CPU clock frequency error
Remedy:
Code: 980
Display: SERVICE CALL 980:ERROR
Description: Duplicate toner cartridge detection error Multiple toner cartridges for the same color ware detected.
Remedy: Media is jammed by entangling around the fuser. Turn off the printer. Replace the fuser.
Code: 983
Display: SERVICE CALL 983:ERROR
Description: Duplicate toner cartridge detection error Multiple toner cartridges for the same color ware detected.
Remedy: Multiple toner cartridges for the same color ware detected. Install toner cartridges for specified colors at the proper positions.
Code: 990
Display: SERVICE CALL 990:ERROR
Description: Waste toner sensor detection error
Remedy: Is the K toner cartridge installed? Does the error occur again? Install the K toner cartridge. Be sure of cable connection, and then perform board replacement.