Remedy: 1. Replace the PSU. 2. Replace the IOB. 3. Replace the BICU.
Code: 544
Description: Heating roller fusing lamp overheat 1 (hardware error) During stand-by mode or a print job, the detected heating roller temperature reaches 250 °C.
Causes: • Defective PSU • Defective IOB • Defective BICU • Defective fusing control system
Remedy: 1. Replace the PSU. 2. Replace the IOB. 3. Replace the BICU.
Code: 545
Description: Heating roller fusing lamp consecutive full power 1 When the fusing unit is not running in the ready condition, the heating roller fusing lamp keeps on full power for 8 seconds.
Causes: • Broken heating roller thermistor
Remedy: 1. Check the power supply source. 2. Replace the +24V fuse on the PSU. 3. Replace the PSU
Code: 547
Description: Zero cross error • The zero cross signal is detected three times even though the heater relay is off when turning on the main power. • The zero cross signal is not detected for 2 seconds even though the heater relay is on after turning on the main power or closing the front door. • The detection error occurs twice or more in the 11 zero cross signal detections. This error is defined when the detected zero cross signal is less than 45.
Remedy: 1. Check the power supply source. 2. Replace the +24V fuse on the PSU. 3. Replace the PSU
Code: 548
Description: Fusing unit rotation error The fusing belt sensor does not detect change in the actuator for 0.5 seconds after the fusing/paper exit motor has turned on.
Causes: • Defective fusing/paper exit motor • Deformed actuator for the fusing belt sensor • Defective fusing belt sensor • Broken connection between IH inverter and IOB • Incorrectly set fusing unit
Remedy: 1. Check if the fusing unit is correctly set. 2. Check or replace the actuator for fusing belt sensor. 3. Replace the fusing belt sensor. 4. Replace the IH inverter. 5. Check the connection between IH inverter and IOB.
Code: 548
Description: Fusing unit rotation error The fusing belt sensor does not detect change in the actuator for 0.5 seconds after the fusing/paper exit motor has turned on.
Causes: • Defective fusing/paper exit motor • Deformed actuator for the fusing belt sensor • Defective fusing belt sensor • Broken connection between IH inverter and IOB • Incorrectly set fusing unit
Remedy: 1. Check if the fusing unit is correctly set. 2. Check or replace the actuator for fusing belt sensor. 3. Replace the fusing belt sensor. 4. Replace the IH inverter. 5. Check the connection between IH inverter and IOB.