• Code: C0520
• Description: Abnormally high fusing temperature
  The surface temperature of the Left Fusing Roller remains higher than 240 °C for a given period of time.
• Remedy: 1 Thermistor (TH1) is dirty. YES • Clean Thermistor (TH1). 2 Thermistor (TH1) is open-circuited. <Check Procedure> Check the resistance across CN15-2 and CN15-3 on the Fusing Unit side with CN15 disconnected. The Thermistor is open-circuited if the resistance is infinity. YES • Change Thermistor (TH1). NO • Change Master Board (copier: PWB-A).

• Code: C0650
• Description: Faulty Scanner Home Position Sensor
  • The Scanner Home Position Sensor (PC6) does not go from HIGH to LOW when the Scanner Motor (M5) is energized for a given number of steps after the sequence to bring the Scanner back to its home position has been started at the end of a scan motion and during re-shading. • The Scanner Home Position Sensor (PC6) does not go from LOW to HIGH when the Scanner Motor (M5) is energized for a given number of steps after a scan motion has been started at the end of a Scanner Home Position Sensor home check scan motion and during re-shading.
• Remedy: 1 Scanner Motor (M5) turns when the Power Switch is turned ON. NO • Change Scanner Motor (M5). 2 Scanner moves smoothly. <Check Procedure> Gently move the Scanner by hand to check for smooth operation. NO • Remove foreign matter and other obstacle. • Clean the Scanner rails. • Clean or change the Scanner bushings. • Reinstall Scanner. 3 Scanner Home Position Sensor (PC6) is operational. <Check Procedure> Check voltage across a Control Board (copier: PWB-C) pin and GND when the sensor is blocked. • Voltage across PJ18C-2 and GND DC5 V when unblocked DC0 V when blocked NO • Change Scanner Home Position Sensor (PC6). YES • Change Control Board (PWB-C).

• Code: C0B60
• Description: Bin Switching Motor malfunction
  If the Upper Home Position Sensor is LOW during an initial operation: • The Lower Home Position Sensor (PC33) is LOW when the Bin Switching Motor (M1) starts turning forward. • If the Lower Home Position Sensor (PC33) does not go LOW at a time 2.5 sec. after the Bin Switching Motor (M1) has started turning forward, the Bin Switching Motor is kept deenergized for a given period of time and then energized again to turn backward. The Upper Home Position Sensor (PC32) does not go LOW after the motor has started turning backward. • The Upper Home Position Sensor (PC32) does not go HIGH at a time 1 sec. after the Bin Switching Motor (M1) has started turning forward. • When the Lower Home Position Sensor (PC33) goes LOW, the Bin Switching Motor (M1) starts turning backward. The Upper Home Position Sensor (PC32) does not go LOW at a time 2.5 sec. after the motor has started turning backward. • When the Lower Home Position Sensor (PC33) goes LOW, the Bin Switching Motor (M1) starts turning backward. The Lower Home Position Sensor (PC33) does not go HIGH at a time 1 sec. after the motor has started turning backward. If the Lower Home Position Sensor is LOW during an initial operation: • The Upper Home Position Sensor (PC32) does not go LOW at a time 2.5 sec. after the Bin Switching Motor (M1) has started turning backward. • The Lower Home Position Sensor (PC33) does not go HIGH at a time 1 sec. after the Bin Switching Motor (M1) has started turning backward. If both the Upper Home Position Sensor and the Lower Home Position Sensor are HIGH during an initial operation: • If the Lower Home Position Sensor (PC33) does not go LOW at a time 2.5 sec. after the Bin Switching Motor (M1) has started turning forward, the Bin Switching Motor is kept deenergized for a given period of time and then energized again to turn backward. The Upper Home Position Sensor (PC32) does not go LOW after the motor has started turning backward. • When the Lower Home Position Sensor (PC33) goes LOW, the Bin Switching Motor (M1) starts turning backward. The Upper Home Position Sensor (PC32) does not go LOW at a time 2.5 sec. after the motor has started turning backward. • When the Lower Home Position Sensor (PC33) goes LOW, the Bin Switching Motor (M1) starts turning backward. The Lower Home Position Sensor (PC33) does not go HIGH at a time 1 sec. after the motor has started turning backward.
• Remedy: 1 Bin Switching Motor (JS-202: M1) turns when the Power Switch is turned ON. NO • Change Bin Switching Motor (JS- 202: M1). 2 Tray is moved as the Bin Switching Motor (JS-202: M1) operates. NO • Reinstall motor unit. 3 Upper Home Position Sensor (JS- 202: PC32) is operational. <Check Procedure> Check voltage across a Main Board (JS-202: PWB-A) pin and GND when the sensor is blocked. • Voltage across PJ4A-3 and GND DC0 V when unblocked DC5 V when blocked NO • Change Upper Home Position Sensor (PC32). 4 Lower Home Position Sensor (JS- 202: PC33) is operational. <Check Procedure> Check voltage across a Main Board (JS-202: PWB-A) pin and GND when the sensor is blocked. • Voltage across PJ4A-6 and GND DC0 V when unblocked DC5 V when blocked NO • Change Lower Home Position Sensor (PC33). YES • Change Master Board (copier: PWB-A).

• Code: C0B80
• Description: Shift Motor malfunction
  • The Home Sensor (S31) is LOW at a timing immediately before the Shift Motor (M1) starts turning backward. • The Home Sensor (S31) is LOW after the lapse of a given period of time after the Shift Motor (M1) has started turning backward.
• Remedy: 1 Shift Motor (OT-103: M1) turns when the Power Switch is turned ON. NO • Change Shift Motor (OT-103: M1). 2 Exit Roller operates as the Shift Motor (OT-103: M1) is energized. NO • Reinstall motor unit. 3 Home Sensor (OT-103: S31) is operational. <Check Procedure> Check voltage across a Main Board (OT-103: PWB-A) pin and GND when the sensor is blocked. • Voltage across PJ3A-3 and GND DC5 V when blocked DC0 V when unblocked NO • Change Home Sensor (OT-103: S31). YES • Change Master Board (copier: PWB-A).

• Code: C0F32
• Description: Faulty ATDC Sensor
  • The measurement taken by the ATDC Sensor (UN1) at a time 2.5 sec. after the Main Motor (M1) has started turning is less than 3 % (greater than 4.98 V). • The measurement taken by the ATDC Sensor (UN1) at a time 2.5 sec. after the Main Motor (M1) has started turning is 19 % or more (1.41 V or less).
• Remedy: 1 Developer is not even in the Developer Mixing Chamber. YES • Gently swing the IU in the horizontal direction to even out developer in the Developer Mixing Chamber. 2 ATDC Sensor (UN1) is dirty with foreign matter (such as paper dust) other than developer. YES • Clean ATDC Sensor (UN1). 3 Foreign matter (such as paper dust) is trapped in the Developer Mixing Chamber. YES • Remove foreign matter from the Developer Mixing Chamber. 4 The following voltages are supplied from the Master Board (copier: PWBA). <Check Procedure> Check voltage across a Master Board pin and GND when the Power Switch is turned ON. • DC5.39 V to 8.15 V across PJ7A-8 and GND • DC1.41 V to 4.98 V across PJ7A- 10 and GND YES • Change ATDC Sensor (UN1) and developer. NO • Change Master Board (copier: PWB-A).

• Code: C0F33
• Description: Improperly adjusted ATDC Sensor
  • The adjustment of the ATDC control voltage is not completed within 1 sec. after sampling has started of the ATDC Sensor (UN1) as part of an operation of ATDC Sensor Automatic Adjustment. • The ATDC Sensor control voltage falls outside the range of 5.39 V to 8.15 V during an operation of ATDC Sensor Automatic Adjustment.
• Remedy: 1 Developer is not even in the Developer Mixing Chamber. YES • Gently swing the IU in the horizontal direction to even out developer in the Developer Mixing Chamber. 2 ATDC Sensor (UN1) is dirty with foreign matter (such as paper dust) other than developer. YES • Clean ATDC Sensor (UN1). 3 Foreign matter (such as paper dust) is trapped in the Developer Mixing Chamber. YES • Remove foreign matter from the Developer Mixing Chamber. 4 The following voltages are supplied from the Master Board (copier: PWBA). <Check Procedure> Check voltage across a Master Board pin and GND when the Power Switch is turned ON. • DC5.39 V to 8.15 V across PJ7A-8 and GND • DC1.41 V to 4.98 V across PJ7A- 10 and GND YES • Change ATDC Sensor (UN1) and developer. NO • Change Master Board (copier: PWB-A).

• Code: C1038
• Description: Engine connection failure
  Master Board (PWB-A) to Control Board (PWB-C) connection failure • There is no acknowledge signal transmitted from the Master Board (PWB-A) to Control Board (PWB-C) for 1.5 sec. or more. • An error command signal is transmitted from the Control Board (PWB-C) to Master Board (PWB-A). • An error status signal is transmitted from the Master Board (PWB-A) to Control Board (PWB-C).
• Remedy: 1 C1038 reappears when the copier is turned OFF and ON again. <Check Procedure> Turn OFF and ON the Power Switch to check to see if C1038 reappears. YES • Go to step 2. 2 The connection between Master Board (copier: PWB-A) and Control Board (copier: PWB-C) is loose. YES • Make good connection between Master Board (copier: PWB-A) and Control Board (copier: PWB-C). NO • Change Control Board (copier: PWB-C). • Change Master Board (copier: PWB-A).

• Code: C1200
• Description: Faulty ASIC/memory
  ASIC/memory (for image and control) fault • A write or read error occurs with SRAM on the Control Board (PWB-C).
• Remedy: 1 C1200 reappears when the copier is turned OFF and ON again. <Check Procedure> Turn OFF and ON the Power Switch to check to see if C1200 reappears. YES • Go to step 2. 2 Memory (U8) on Control Board (copier: PWB-C) is loose. YES • Reinstall memory (U8). NO • Change Control Board (copier: PWB-C).