Code :

Code: SC544
Description: Fusing overheat error 2: Hardware The backup circuit detected fusing temperature over 235°C (455°F) for longer than the time prescribed for high temperature fluctuation.
Causes: • TRIAC short, IOB board defective • PSU board defective • Fusing unit defective
Remedy:

Code: SC545
Description: Fusing lamp overheat error 3 After reaching the ready temperature, the hot roller does not start to rotate and the fusing lamp stays on at full power for 50 sec.
Causes: • Fusing lamp harness loose, broken, defective • IOB defective
Remedy:

Code: SC546
Description: Unstable fusing temperature Fusing temperature fluctuated more than 20°C (68°F) within 1 sec. more than 7 times during the previous 60 sec. of fusing temperature control.
Causes: • Thermistor disconnected • Thermistor out of position, not in contact with hot roller • Thermistor connection loose, broken, defective
Remedy:

Code: SC547
Description: Zero-cross signal error One of the following conditions occurred: • No zero-cross signal detected within 50 ms after the machine was powered on with Relay 0 off, or abnormal zero-cross detected 3 times. • No zero-cross signal detected for 3 sec. after fusing relay turned on after power on. • Abnormal mains frequency was detected more than 10 times.
Causes: • Electrical noise on the power line • PSU power relay defective.
Remedy:

Code: SC551
Description: Pressure roller center thermistor error 1 The thermistor returned temperature readings less than 5°C (41°F) for 12 sec. during fusing temperature control while the hot roller and pressure rollers were rotating
Causes: • Thermistor connection loose, broken, defective • Thermistor floating free, not positioned correctly • Thermistor defective • IOB defective
Remedy:

Code: SC553
Description: Pressure roller center thermistor error During fusing temperature control the thermistor at the center of the pressure roller returned an abnormally low reading.
Causes: • Thermistor has short circuited • Thermistor not positioned correctly • Thermistor harness loose, broken, defective • Thermistor defective • IOB defective
Remedy:

Code: SC557
Description: Applied zero-cross waveform error The applied power ac frequency was detected less than 66 Hz more than 10 times.
Causes: • Noise on the ac power supply line
Remedy:

Code: SC559
Description: Three consecutive fusing paper jam errors Three consecutive paper jam errors occurred in the fusing unit. Note: This SC code is not issued unless SP1159 is switched on.
Causes: • Paper jam in fusing unit • Pick-off pawl defective • Paper scraps in fusing unit • Exit sensor defective
Remedy: