Konica-Minolta bizhub 7521 Error Codes List page 1 from 4

Exploded Views and Parts List Free!

  • Code: C0000
  • Description: Main Motor malfunction
    • The Main Motor (M1) Lock signal remains HIGH for a continuous 1-sec. period at any time 1 sec. after the Main Motor has started turning.
  • Remedy: 1 Check M1 connectors for proper connection and correct as necessary. 2 Check M1 for correct drive coupling and correct as necessary. 3 M1 operation check. 4 Change PWB-A. 5 Change PU1.
  • Code: C0044
  • Description: ADF Cooling Fan Failure (Only when the optional DF is mounted)
    • The ADF Fan Motor Lock signal remains set to H for a set period of time while the EDH Fan Motor is turning.
  • Remedy: 1 Check the motor connectors for paper connection, and correct as necessary. 2 Check the fan for possible overload, and correct as necessary. 3 M3-ADF operation check. 4 Replace PBA-CONT.
  • Code: C0045
  • Description: Fusing Cooling Fan Motor malfunction
    - The Fusing Cooling Fan Motor (M3) Lock signal remains HIGH for a continuous 1-sec. period while the Fusing Cooling Fan Motor is turning at full speed or decelerated speed.
  • Remedy: 1 Check M3 connectors for proper connection and correct as necessary. 2 Check the fan for possible overload and correct as necessary. 3 M3 operation check 4 Change PWB-A. 5 Change PU1.
  • Code: C004E
  • Description: Power Supply Cooling Fan Motor malfunction
    - The Power Supply Cooling Fan Motor (M4) Lock signal remains HIGH for a continuous 1-sec. period while the Power Supply Cooling Fan Motor Remote signal remains ON (for full-speed rotation) or OFF (for decelerated-speed rotation).
  • Remedy: 1 Check M4 connectors for proper connection and correct as necessary. 2 Check the fan for possible overload and correct as necessary. 3 M4 operation check 4 Change PWB-A. 5 Change PU1.
  • Code: C0070
  • Description: Toner Replenishing Motor malfunction
    - The Toner Bottle Home Position Sensor (PC7) outputs a HIGH signal for a continuous 3.5-sec. period while the Toner Bottle is turning.
    - The Toner Bottle Home Position Sensor (PC7) outputs a LOW signal for a continuous 2-sec. period while the Toner Bottle is turning.
  • Remedy: 1 Check M6 connectors for proper connection and correct as necessary. 2 Check M6 for correct drive coupling and correct as necessary. 3 M6 operation check 4 PC7 sensor check 5 Change PWB-A. 6 Change PU1.
  • Code: C0210
  • Description: Abnormal image transfer voltage
    - The image transfer voltage remains more than 100 V continuously for a given period of time while the PC Drum remains stationary.
  • Remedy: 1 Check the Image Transfer Roller for installation. 2 Change HV1. 3 Change PWB-A.
  • Code: C03FF
  • Description: Faulty Model Setting
    - “Model Setting” of “Adjust” available from the Service mode is incorrectly set.
  • Remedy:
  • Code: C0500
  • Description: Warm-up failure
    - The surface temperature of the Fusing Roller does not reach a given level even after the lapse of a given period of time during a warm-up cycle.
  • Remedy: 1 Check that the Fusing Roller Heater Lamp (H1) turns ON when the Power Switch is turned ON and correct or replace the lamp as necessary. 2 Check that the Fusing Roller Sub Heater Lamp (H2) turns ON when the Power Switch is turned ON and correct or replace the lamp as necessary. 3 Check the Fusing Roller Thermostat (TS1) for operation. <Check procedure> Check the resistance of TS1. TS1 is open-circuited if its resistance is infinity. 4 Check the Fusing Unit Interlock Switch (S2) for operation. <Check procedure> Check continuity across the following terminals when S2 is ON. • Across S2-1A and S2-1B • Across S2-2A and S2-2B 5 Check the Fusing Roller Thermistor (TH1) and Fusing Roller Sub Thermistor (TH2) for installation and correct or clean as necessary. 6 Check the Fusing Roller Thermistor (TH1) for operation. <Check procedure> Disconnect CN15 (4P) and check the resistance across CN15-2 and 3 on the Thermistor side. TH1 is open-circuited if the resistance is infinity. 7 Check the Fusing Roller Sub Thermistor (TH2) for operation. <Check procedure> Disconnect CN22 (4P) and check the resistance across CN22-2 and 3 on the Thermistor side. TH2 is open-circuited if the resistance is infinity. 8 Check the Fusing Roller Heater Lamp (H1) for continuity and correct or replace as necessary. 9 Check the Fusing Roller Sub Heater Lamp (H2) for continuity and correct or replace as necessary. 10 Change PU1. 11 Change PWB-A.