• Code: C7914
• Description: Developing unit Y EEPROM error Reading from or writing to EEPROM cannot be performed.
• Causes: Poor contact in the connector terminals. Defective developing PWB Y.
• Remedy: Poor contact in the connector terminals. Check the connection of connector YC18 on the engine PWB and the continuity across the connector terminals. Repair or replace if necessary. Defective developing PWB Y. Replace the developing unit Y.

• Code: C8020
• Description: Punch motor problem (optional 3000 sheet document finisher) The LOCK signal of the punch motor is detected for more than 500 ms while the punch motor is operating.
• Causes: Poor contact in the connector terminals. Defective punch motor. Defective PWB.
• Remedy: Poor contact in the connector terminals. Check the connection of connector on the punch PWB and the continuity across the connector terminals. Repair or replace if necessary. Defective punch motor. Replace the punch motor. Defective PWB. Replace the punch PWB or finisher main PWB and check for correct operation.

• Code: C8030
• Description: Tray upper limit detection problem (optional document finisher) When the tray elevation motor raises a tray, the ON status of the tray upper limit sensor is detected.
• Causes: The tray upper limit sensor/push paper sensor/surface view sensor connector makes poor contact. Defective tray upper limit sensor/ push paper sensor/ surface view sensor. Defective finisher main PWB.
• Remedy: The tray upper limit sensor/push paper sensor/surface view sensor connector makes poor contact. Reinsert the connector. Also check for continuity within the connector cable. If none, remedy or replace the cable. Defective tray upper limit sensor/ push paper sensor/ surface view sensor. Replace the sensor. Defective finisher main PWB. Replace the finisher main PWB and check for correct operation.

• Code: C8050
• Description: Paper conveying belt motor 1 problem (optional 3000-sheet document finisher) Paper conveying belt home position sensor 1 does not turn off within 1.5 s. Paper conveying belt home position sensor 1 does not turn on within 2.5 s. Jam 88 is indicated.
• Causes: Poor contact in the connector terminals. Defective paper conveying belt home position sensor 1. Defective paper conveying belt motor 1. Defective PWB.
• Remedy: Poor contact in the connector terminals. Check the connection of connector YC2 on the internal tray PWB and the connector on paper conveying belt motor 1, and the continuity across the connector terminals. Repair or replace if necessary. Defective paper conveying belt home position sensor 1. Replace paper conveying belt home position sensor 1. Defective paper conveying belt motor 1. Replace paper conveying belt motor 1. Defective PWB. Replace the internal tray PWB or finisher main PWB and check for correct operation.

• Code: C8060
• Description: Paper conveying belt motor 2 problem (optional 3000-sheet document finisher) Paper conveying belt home position sensor 2 does not turn off within 1.5 s. Paper conveying belt home position sensor 2 does not turn on within 1.5 s.
• Causes: Poor contact in the connector terminals. Defective paper conveying belt home position sensor 2. Defective paper conveying belt motor 2. Defective PWB.
• Remedy: Poor contact in the connector terminals. Check the connection of connector YC6 on the internal tray PWB and the connector on paper conveying belt motor 2, and the continuity across the connector terminals. Repair or replace if necessary. Defective paper conveying belt home position sensor 2. Replace paper conveying belt home position sensor 2. Defective paper conveying belt motor 2. Replace paper conveying belt motor 2. Defective PWB. Replace the internal tray PWB or finisher main PWB and check for correct operation.

• Code: C8070
• Description: Internal tray communication error (optional 3000-sheet document finisher) Communication with the internal tray is not possible although the connection is detected.
• Causes: Poor contact in the connector terminals. Defective PWB.
• Remedy: Poor contact in the connector terminals. Check the connection of connector YC6 on the finisher main PWB and the connector YC1 on the internal tray PWB, and the continuity across the connector terminals. Repair or replace if necessary. Defective PWB. Replace the internal tray PWB or finisher main PWB and check for correct operation.

• Code: C8140
• Description: Main tray problem (optional 3000- sheet document finisher) The main tray is not detected by the main tray upper limit detection sensor or the main tray paper upper surface detection sensor within 20s since the tray has started ascending. The main tray upper limit detection sensor or the main tray paper upper surface detection sensor is not detected to be turned off in 20 s after the main tray has descended. The main tray low limit detection sensor is not detected to be turned on in 20 s after the main tray has descended. During main tray ascent, the main tray upper limit detection sensor or the main tray paper upper surface detection sensor stays on for more than 2 s.
• Causes: Poor contact in the connector terminals Defective main tray motor .Defective main tray upper limit detection sensor/main tray paper upper surface detection sensor/main tray lower limit detection sensor. Defective finisher main PWB.
• Remedy: Poor contact in the connector terminals. Check the connection of connector YC6 on the finisher main PWB and the connector on the main tray motor, and the continuity across the connector terminals. Repair or replace if necessary. Defective main tray motor. Replace the main tray motor. Defective main tray upper limit detection sensor/main tray paper upper surface detection sensor/main tray lower limit detection sensor. Replace the sensor. Defective finisher main PWB. Replace the finisher main PWB and check for correct operation.

• Code: C8140
• Description: Tray elevation motor problem (optional document finisher) The tray low limit sensor, paper retaining sensor or paper surface sensor cannot be detected to be on within 10 s since the tray elevation motor is activated.
• Causes: The tray elevation motor connector makes poor contact. The tray elevation motor malfunctions. The tray lower limit sensor/push paper sensor/surface view sensor connector makes poor contact. Defective tray lower limit sensor/ push paper sensor/ surface view sensor. Defective finisher main PWB.
• Remedy: The tray elevation motor connector makes poor contact. Reinsert the connector. Also check for continuity within the connector cable. If none, remedy or replace the cable. The tray elevation motor malfunctions. Replace the tray elevation motor. The tray lower limit sensor/push paper sensor/surface view sensor connector makes poor contact. Reinsert the connector. Also check for continuity within the connector cable. If none, remedy or replace the cable. Defective tray lower limit sensor/ push paper sensor/ surface view sensor. Replace the sensor. Defective finisher main PWB. Replace the finisher main PWB and check for correct operation.