• Code: C0501
• Description: Fusing Warm-Up Failure (Sub)
  • The Fusing Roller Sub Thermistor does not detect the required temperature within 30 sec. after a warm-up cycle has begun; therefore, the copier does not complete the warm-up cycle. • The temperature of the Fusing Rollers does not reach the required level even after the set period of time has elapsed during a warm-up cycle.
• Remedy: 1 Check that the Fusing Roller Heater Lamp comes on when the Power Switch is set to ON, and correct or replace as necessary. 2 Check that the Fusing Roller Sub Heater Lamp comes on when the Power Switch is set to ON, and correct or replace as necessary. 3 Check the installation of the Fusing Roller Thermistor and the Fusing Roller Sub Thermistor, and correct or clean as necessary. 4 Check the operation of the Fusing Roller Thermistor. Remove CN80 (4P), and then check that the resistance across CN80-2 and - 3 on the Thermistor is infinity. 5 Check the operation of the Fusing Roller Sub Thermistor. Remove CN81 (4P), and then check that the resistance across CN81-2 and - 3 on the Thermistor is infinity. 6 Check the continuity of the Fusing Roller Heater Lamp. Correct or replace as necessary. 7 Check the continuity of the Fusing Roller Sub Heater Lamp. Correct or replace as necessary. 8 Replace PU1. 9 Replace PWB-A.

• Code: C0510
• Description: Low Fuser Temperature Failure (Main)
  • The Fusing Roller Thermistor and Fusing Roller Sub Thermistor are detected to be at a temperature below 105C during standby. • The Fusing Roller Thermistor and Fusing Roller Sub Thermistor are detected to be at a temperature below 105C during printing.
• Remedy: 1 Check that the Fusing Roller Heater Lamp comes on when the Right-Side Door is opened, then closed, and correct or replace as necessary. 2 Check that the Fusing Roller Sub Heater Lamp comes on when the Right-Side Door is opened, then closed, and correct or replace as necessary. 3 Check the installation of the Fusing Roller Thermistor and the Fusing Roller Sub Thermistor, and correct or clean as necessary. 4 Check the operation of the Fusing Roller Thermistor. Remove CN80 (4P), and then check that the resistance across CN80-2 and -3 on the Thermistor is infinity. 5 Check the operation of the Fusing Roller Sub Thermistor. Remove CN81 (4P), and then check that the resistance across CN81-2 and -3 on the Thermistor is infinity. 6 Check the continuity of the Fusing Roller Heater Lamp. Correct or replace as necessary. 7 Check the continuity of the Fusing Roller Sub Heater Lamp. Correct or replace as necessary. 8 Replace PU1. 9 Replace PWB-A.

• Code: C0511
• Description: Low Fuser Temperature Failure (Sub)
  • The Fusing Roller Thermistor and Fusing Roller Sub Thermistor are detected to be at a temperature below 105C during standby. • The Fusing Roller Thermistor and Fusing Roller Sub Thermistor are detected to be at a temperature below 105C during printing.
• Remedy: 1 Check that the Fusing Roller Heater Lamp comes on when the Right-Side Door is opened, then closed, and correct or replace as necessary. 2 Check that the Fusing Roller Sub Heater Lamp comes on when the Right-Side Door is opened, then closed, and correct or replace as necessary. 3 Check the installation of the Fusing Roller Thermistor and the Fusing Roller Sub Thermistor, and correct or clean as necessary. 4 Check the operation of the Fusing Roller Thermistor. Remove CN80 (4P), and then check that the resistance across CN80-2 and -3 on the Thermistor is infinity. 5 Check the operation of the Fusing Roller Sub Thermistor. Remove CN81 (4P), and then check that the resistance across CN81-2 and -3 on the Thermistor is infinity. 6 Check the continuity of the Fusing Roller Heater Lamp. Correct or replace as necessary. 7 Check the continuity of the Fusing Roller Sub Heater Lamp. Correct or replace as necessary. 8 Replace PU1. 9 Replace PWB-A.

• Code: C0520
• Description: High Fuser Temperature Failure (Main)
  • The Fusing Roller Thermistor and Fusing Roller Sub Thermistor are detected to be at a temperature above 240C when the Power Switch is set to ON. • The Fusing Roller Thermistor and Fusing Roller Sub Thermistor are detected to be at a temperature above 240C when the Power Switch is set to ON.
• Remedy: 1 Check that the Fusing Roller Heater Lamp comes on when the Right-Side Door is opened, then closed, and correct or replace as necessary. 2 Check that the Fusing Roller Sub Heater Lamp comes on when the Right-Side Door is opened, then closed, and correct or replace as necessary. 3 Check the installation of the Fusing Roller Thermistor and the Fusing Roller Sub Thermistor, and correct or clean as necessary. 4 Check the operation of the Fusing Roller Thermistor. Remove CN80 (4P), and then check that the resistance across CN80-2 and -3 on the Thermistor is infinity. 5 Check the operation of the Fusing Roller Sub Thermistor. Remove CN81 (4P), and then check that the resistance across CN81-2 and -3 on the Thermistor is infinity. 6 Check the continuity of the Fusing Roller Heater Lamp. Correct or replace as necessary. 7 Check the continuity of the Fusing Roller Sub Heater Lamp. Correct or replace as necessary. 8 Replace PU1. 9 Replace PWB-A.

• Code: C0521
• Description: High Fuser Temperature Failure (Sub)
  • The Fusing Roller Thermistor and Fusing Roller Sub Thermistor are detected to be at a temperature above 240C when the Power Switch is set to ON. • The Fusing Roller Thermistor and Fusing Roller Sub Thermistor are detected to be at a temperature above 240C when the Power Switch is set to ON.
• Remedy: 1 Check that the Fusing Roller Heater Lamp comes on when the Right-Side Door is opened, then closed, and correct or replace as necessary. 2 Check that the Fusing Roller Sub Heater Lamp comes on when the Right-Side Door is opened, then closed, and correct or replace as necessary. 3 Check the installation of the Fusing Roller Thermistor and the Fusing Roller Sub Thermistor, and correct or clean as necessary. 4 Check the operation of the Fusing Roller Thermistor. Remove CN80 (4P), and then check that the resistance across CN80-2 and -3 on the Thermistor is infinity. 5 Check the operation of the Fusing Roller Sub Thermistor. Remove CN81 (4P), and then check that the resistance across CN81-2 and -3 on the Thermistor is infinity. 6 Check the continuity of the Fusing Roller Heater Lamp. Correct or replace as necessary. 7 Check the continuity of the Fusing Roller Sub Heater Lamp. Correct or replace as necessary. 8 Replace PU1. 9 Replace PWB-A.

• Code: C0900
• Description: 3rd Drawer Lift-Up Motor Failure
• Remedy: 1 Check the connectors of each motor and sensor for proper connection, and correct as necessary. 2 Check the connector of each motor for proper drive coupling, and correct as necessary. 3 Check the PU1 connector for proper connection, and correct as necessary. 4 PC6 sensor check. 5 PC12 sensor check. 6 PC114-PF sensor check. 7 PC123-PF sensor check. 8 M7 operation check. 9 M8 operation check. 10 M124-PF operation check. 11 M125-PF operation check. 12 Replace PWB-A. 13 Replace the PWB-C2 PF Control Board. 14 Replace PU1.

• Code: C0910
• Description: 2nd Drawer Lift-Up Motor Failure
• Remedy: 1 Check the connectors of each motor and sensor for proper connection, and correct as necessary. 2 Check the connector of each motor for proper drive coupling, and correct as necessary. 3 Check the PU1 connector for proper connection, and correct as necessary. 4 PC6 sensor check. 5 PC12 sensor check. 6 PC114-PF sensor check. 7 PC123-PF sensor check. 8 M7 operation check. 9 M8 operation check. 10 M124-PF operation check. 11 M125-PF operation check. 12 Replace PWB-A. 13 Replace the PWB-C2 PF Control Board. 14 Replace PU1.

• Code: C0920
• Description: 1st Drawer Lift-Up Motor Failure
• Remedy: 1 Check the connectors of each motor and sensor for proper connection, and correct as necessary. 2 Check the connector of each motor for proper drive coupling, and correct as necessary. 3 Check the PU1 connector for proper connection, and correct as necessary. 4 PC6 sensor check. 5 PC12 sensor check. 6 PC114-PF sensor check. 7 PC123-PF sensor check. 8 M7 operation check. 9 M8 operation check. 10 M124-PF operation check. 11 M125-PF operation check. 12 Replace PWB-A. 13 Replace the PWB-C2 PF Control Board. 14 Replace PU1.