• Code: C7913
• Description: Developing unit M EEPROM error
  No response is issued from the device in reading/writing for 5 ms or more and this problem is repeated five times successively. Mismatch of reading data from two locations occurs eight times successively. Mismatch between writing data and reading data occurs eight times successively.
• Causes: Poor contact in the connector terminals. Defective developing PWB M.
• Remedy: Poor contact in the connector terminals. Check the connection of connector YC8 on the sub front PWB and the continuity across the connector terminals. Repair or replace if necessary.
  Defective developing PWB M. Replace the developing unit M.

• Code: C7914
• Description: Developing unit Y EEPROM error
  No response is issued from the device in reading/writing for 5 ms or more and this problem is repeated five times successively. Mismatch of reading data from two locations occurs eight times successively. Mismatch between writing data and reading data occurs eight times successively.
• Causes: Poor contact in the connector terminals. Defective developing PWB Y.
• Remedy: Poor contact in the connector terminals. Check the connection of connector YC4 on the sub front PWB and the continuity across the connector terminals. Repair or replace if necessary.
  Defective developing PWB Y. Replace the developing unit Y.

• Code: C7950
• Description: High voltage control PWB error
  A communication error from high voltage control PWB is detected 10 times in succession.
• Causes: Poor contact in the connector terminals. Defective PWB.
• Remedy: Poor contact in the connector terminals. Check the connection of connector YC30 on the engine PWB and the connector on the high voltage control PWB, and the continuity across the connector terminals. Repair or replace if necessary.
  Defective PWB. Replace the high voltage control PWB or engine PWB and check for correct operation.

• Code: C8020
• Description: Punch motor problem (optional 3000- sheet document finisher)
  The error 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, paper surface sensor 1/2 connector makes poor contact. Defective tray upper limit sensor, paper surface sensor 1/2. Defective finisher main PWB.
• Remedy: The tray upper limit sensor, paper surface sensor 1/2 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, paper surface sensor 1/2. Replace the sensor.
  Defective finisher main PWB. Replace the finisher main PWB and check for correct operation.

• Code: C8040
• Description: Belt problem (optional document finisher)
  The belt sensor does not turn on/off within specified time of the belt solenoid turning on.
• Causes: The belt sensor, belt solenoid connector makes poor contact. Defective belt sensor. Defective belt solenoid. Defective finisher main PWB.
• Remedy: The belt sensor, belt solenoid connector makes poor contact. Reinsert the connector. Also check for continuity within the connector cable. If none, remedy or replace the cable.
  Defective belt sensor. Replace the belt sensor.
  Defective belt solenoid. Replace the belt solenoid.
  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 inner 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 inner 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 inner 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 inner tray PWB or finisher main PWB and check for correct operation.