• Code: 254
• Display: Service Call 254:Error
• Description: An unexpected error occurred during initialization of the Security mode. Error cause information is displayed after the error code number.
• Remedy: Power OFF/ON. Does this error message reappear? Yes Regenerate an encryption key. If it doesn’t solve the problem, replace the CU PCB.

• Code: 257
• Display: Service Call 257:Error
• Description: An unexpected error occurred during initialization of the HDD. Error cause information is displayed after the error code number.
• Remedy: Power OFF/ON. Does this error message reappear? Yes Format the HDD again. If it does not solve the problem, replace the HDD

• Code: 901, 902
• Display: Power Off/On 901:Error 902:Error
• Description: Short circuit (901) or open circuit (902) with the belt thermistor was detected.
• Remedy: Check the belt thermistor wiring. (Is there any abnormal condition with the belt unit, contact substrate which is the tag terminal PCB of the printer unit, or the cable)? Yes Replace the part or the belt unit. No Replace the driver relay PCB.

• Code: 903, 904
• Display: Power Off/On 903:Error 904:Error
• Description: The belt thermistor detected abnormal temperature. 903:too high 904:too low
• Remedy: Check the belt thermistor wiring. (Is there any abnormal condition with the belt unit, contact substrate which is the tag terminal PCB of the printer unit, or the cable)? Yes Replace the part or the belt unit. No Replace the driver relay PCB.

• Code: 993
• Display: Service Call 993:Error
• Description: An error was detected with the paper thickness sensor power cable
• Remedy: Power OFF/ON. Does this error recur? Yes Replace the paper thickness sensor and the cable. Does this error recur? Yes Replace the printer control PCB.

• Code: 994
• Display: Service Call 994:Error
• Description: A fuser where a high temperature error was detected is installed.
• Remedy: Power OFF/ON. Does this error recur? Yes Replace the fuser unit.

• Code: F0C
• Display: Power Off/On F0C:Error
• Description: CU program error
• Remedy: Power OFF/ON. Does this error recur? Yes Replace the printer control PCB.

• Code: FFF
• Display: Power Off/On FFF:Error
• Description: CU program error
• Remedy: Power OFF/ON. Does this error recur? Yes Replace the printer control PCB.