• Code: C3926
• Description: Fusing sensor wire breaks detection (Middle of the heating roller). • After a predetermined period of time after the warm-up stage is started, the heating roller thermistor/2 (TH2) voltage does not decrease by predetermined steps (temperature rise) within a predetermined time. • When a temperature detected by the heating roller thermister/1 (TH1) is compared with the temperature detected by the heating roller thermister/2 (TH2) to find out that the difference exceeded the predetermined temperature.
• Causes: • Fusing unit • Heating roller thermistor/1 (TH1) • Heating roller thermistor/2 (TH2) • Printer control board (PRCB)
• Remedy: 1 Check the fusing unit for correct installation (whether it is secured in position). 2 Check the open/close operation of the upper right door. 3 Check the fusing unit and PRCB for proper connection and correct or change as necessary. 4 Replace the fusing unit (bizhub 554e/bizhub 454e) 5 Replace PRCB

• Code: C392A
• Description: Heating roller temperature sensor contamination (Main of the heating side). <bizhub 554e> When the machine is in standby mode after a predetermined period of time after the warm-up stage is started, detected temperature of the heating roller temperature sensor (TEMS) lower than a given temperature for a given period of time consecutively.
• Causes: • Fusing unit • Heating roller temperature sensor (TEMS) • Printer control board (PRCB)
• Remedy: 1 Wipe the TEMS clean of dirt if any. <Cleaning procedure> • Clear away a dirt or a foreign object on the sensor with a cotton swab. • When a dirt is left even if you cleaned the sensor by above procedure, clear away a dirt or a foreign object on the sensor using a cotton swab dampened with the alcohol. And, wipe off the sensor with a dry cotton swab afterwards. 2 Check the TEMS for installed position and proper connector connection. 3 Check the connection of the fusing unit. 4 Check the fusing unit and PRCB for proper connection and correct or change as necessary. 5 Replace the fusing unit 6 Replace PRCB

• Code: C3B02
• Description: IH malfunction (CPU). <bizhub 554e> A failure in communication with the fusing CPU continues for a predetermined period of time.
• Causes: • Fusing unit • IH coil unit (IHC) • IH power supply (IHPU) • IH magnetic erasing board (IHMEB) • Printer control board (PRCB)
• Remedy: 1 Check the fusing unit for correct installation (whether it is secured in position). 2 Check the open/close operation of the upper right door. 3 Check the fusing unit, IHC, IHPU, IHMEB and PRCB for proper connection and correct or change as necessary. 4 Replace the fusing unit 5 Replace IHC 6 Replace IHPU 7 Replace IHMEB 8 Replace PRCB

• Code: C3B03
• Description: IH malfunction (monitor) <bizhub 554e> Though the IH heater is OFF, mechanically, the ON status is detected. (Malfunction of IH heater operation)
• Causes: • Fusing unit • IH coil unit (IHC) • IH magnetic erasing board (IHMEB) • Printer control board (PRCB)
• Remedy: 1 Check the fusing unit for correct installation (whether it is secured in position). 2 Check the open/close operation of the upper right door. 3 Check the fusing unit, IHC, IHPU, IHMEB and PRCB for proper connection and correct or change as necessary. 4 Replace the fusing unit 5 Replace IHC 6 Replace IHPU 7 Replace IHMEB 8 Replace PRCB

• Code: C3B07
• Description: IH input power error. <bizhub 554e> • While the IH heater was ON, input power stayed at the high voltage power detection value or over for more than the predetermined period of time. • While the IH heater was ON, input power was at the low power detection value or under for more than the predetermined period of time. • While the IH heater was ON, input power was at the high voltage detection value or over for more than the predetermined period of time. • While the IH heater was ON, input power was below the low voltage detection value or under for more than the predetermined period of time. • While the IH heater was ON, inverter power stayed at the upper limit value or over for more than the predetermined period of time. • While the IH heater was ON, output voltage halt was detected.
• Causes: • IH coil unit (IHC) • IH power supply (IHPU) • Printer control board (PRCB)
• Remedy: 1 Check the connection of the fusing unit. 2 Check the fusing unit, IHC, IHPU and PRCB for proper connection and correct or change as necessary. 3 Replace IHC 4 Replace IHPU 5 Replace PRCB

• Code: C3B08
• Description: IH input voltage error. <bizhub 554e> • While the IH heater was ON, input power was at the high voltage detection value or over for more than the predetermined period of time. • While the IH heater was ON, input voltage was at the low power detection value or under for more than the predetermined period of time.
• Causes: • IH coil unit (IHC) • IH power supply (IHPU) • Printer control board (PRCB)
• Remedy: 1 Check the connection of the fusing unit. 2 Check the fusing unit, IHC, IHPU and PRCB for proper connection and correct or change as necessary. 3 Replace IHC 4 Replace IHPU 5 Replace PRCB

• Code: C4091
• Description: I/F communication error. The communication between the MFPB and PRCB can not be completed even when elapsed a given period of time.
• Causes: • MFP board (MFPB) • Printer control board (PRCB)
• Remedy: 1 Reboot the machine. 2 Check the flat cable between MFPB PJ03-PRCB CN41 for proper connection and correct as necessary. 3 Check the connected portion of the flat cable for any curled pattern or any scratches, and replace it if necessary. 4 Replace MFPB 5 Replace PRCB

• Code: C4101
• Description: Polygon motor rotation trouble. • The polygon motor fails to turn stably even after the lapse of a given period of time after activating and changing rotation speed the polygon motor. • Motor lock signal detects HIGH for a given period time consecutively during the polygon motor is rotating.
• Causes: • PH unit • Front side board (FRB) • Printer control board (PRCB)
• Remedy: 1 Check the connector between PH unit-FRB CN17 for proper connection and correct as necessary. 2 Replace the PH unit 3 FRB fuse conduction check 4 Replace FRB 5 Replace PRCB