Code :

Code: 551
Description: Fusing thermistor open (end) The thermistor (end) detects 0°C or less for 16 sec.
Causes: • Fusing thermistor (end) disconnected • Fusing thermistor (end) connector defective
Remedy:

Code: 552
Description: Fusing temperature warm-up error (end) This SC is generated if the following condition occurs: • The thermistor (end) does not detect an 8°C increment in the fusing temperature for 1.5 sec. just after the fusing temperature reached 45°C. • The temperature of the center thermistor does not reach 60°C for 7 seconds after the fusing lamps turned on. • The temperature of the end thermistor does not reach the target temperature for 26 seconds after the fusing lamps turned on.
Causes: • Thermistor warped or broken • Input voltage is unwarranted
Remedy:

Code: 553
Description: Fusing overheat error 2 (software detection) A fusing temperature (at the end) of over 230°C (446°F) is detected for 1 second by the fusing thermistors at the center or at either end of the fusing roller.
Causes: • Power supply unit defective • I/O board (IOB) defective • BCU defective • TRIAC short on bridge board (bridge board defective)
Remedy:

Code: 554
Description: Fusing overheat error 2 (hardware detection) A fusing temperature (at the end) over 250°C is detected by the fusing temperature monitor circuit in the BCU board.
Causes: • I/O board (IOB) defective • BCU defective • TRIAC short on bridge board (bridge board defective)
Remedy:

Code: 555
Description: Fusing lamp consecutive full power 2 After warm-up, the fusing lamp remains at full power for 10 seconds without the hot roller rotating.
Causes: • Thermistor (ends) warped • Disconnected or defective thermistors (ends) • Defective fusing lamp
Remedy:

Code: 557
Description: Zero cross frequency error When the zero cross signal is 66 or more and it is detected 10 times or more in 11 detections, the machine determines that input 60 Hz and SC557 occurs.
Causes: • Noise (High frequency)
Remedy:

Code: 559
Description: Fusing unit jam The fusing sensor detected a fusing unit paper late jam three times. The paper was late and the fusing exit sensor could not detect the paper three times.
Causes: • Remove the paper that is stopped in the fusing unit. • Check that the fusing unit is clean and has no obstacles in the paper feed path. • If the error persists, replace the fusing unit.
Remedy: • SC559 does not operate until SP1159 has been set to "1" (ON). This sets the machine to count the number of occurrences of paper late jams in the fusing unit. The default setting is "0" (OFF). • SC559 is issued after the third occurrence of a paper late jam in the fusing unit. Once this SC has been issued, the machine cannot be used until the service technician removes the cause of the jam and restores it to normal operation. • The jam counter is reset after a sheet of paper successfully passes the fusing exit sensor after the cause of the jam has been removed.

Code: 610
Description: Mechanical counter error: BK This SC is only for NA models. The machine detects the mechanical counter error when SP5987-001 is set to "1".
Causes: • Disconnected mechanical counter • Defective mechanical counter
Remedy: