• Code: 7B
• Description: Main PCB failure
• Causes:
• Remedy: 1 Main PCB failure Replace the main PCB ASSY.

• Code: 7D
• Description: Dirt on drum unit
• Causes: • Clean the corona wire of the drum unit. • Replace the drum unit with a new one.
  Dirt or dust on drum unit electrodes HVPS PCB failure Main PCB failure
• Remedy: 1 Dirt or dust on drum unit electrodes Clean the electrodes on the drum unit. 2 HVPS PCB failure Replace the HVPS PCB ASSY. 3 Main PCB failure Replace the main PCB ASSY.

• Code: 7F
• Description: Fax paper setting mismatch
  (The setting paper becomes besides the A4/Letter/Legal/Folio.)
• Causes:
• Remedy: • Set the A4/Letter/Legal/Folio using the paper size setting in menu. 1 Main PCB failure Replace the main PCB ASSY.

• Code: 80
• Description: Fax paper size is small
  (The registration rear sensor detected the paper that is smaller than the letter size.)
• Causes:
• Remedy: • Set the paper of A4 or LETTER-size on the paper tray. 1 Registration front actuator catching in some position Re-assemble the registration front actuator.

• Code: 84
• Description: Paper jam in rear of the machine
  (It is detects by the eject sensor)
• Causes: Paper jam in the rear of the machine (It is detects by the eject sensor)
• Remedy: 1 Harness connection failure of registration front sensor PCB ASSY, registration rear sensor PCB ASSY or paper eject sensor PCB ASSY Check the harness connections of the registration front sensor PCB ASSY, registration rear sensor PCB ASSY and paper eject sensor PCB ASSY, and reconnect them. 2 Registration front actuator, registration rear actuator or paper eject actuator not operating smoothly or catching in some position. Ensure smooth operation of the registration front actuator, registration rear actuator or paper eject actuator and ensure they are not catching in any positions. 3 Paper eject sensor PCB failure Check the sensor performance following the procedure described in "Maintenance mode 32". If any problem occurs, replace the eject sensor PCB ASSY. 4 Registration front sensor PCB failure Check the sensor performance following the procedure described in "Maintenance mode 32". If any problem occurs, replace the registration front sensor PCB ASSY. 5 Registration rear sensor PCB failure Check the sensor performance following the procedure described in "Maintenance mode 32". If any problem occurs, replace the registration rear sensor PCB ASSY. 6 Registration ground spring failure Re-assemble the registration ground spring. 7 Main PCB failure Replace the main PCB ASSY.

• Code: 88
• Description: Paper jam inside the machine
  (It is detects by the registration rear sensor)
• Causes: Paper jam inside the machine (It is detects by the registration rear sensor)
• Remedy: 1 Harness connection failure of registration front sensor PCB ASSY, registration rear sensor PCB ASSY or paper eject sensor PCB ASSY Check the harness connections of the registration front sensor PCB ASSY, registration rear sensor PCB ASSY and paper eject sensor PCB ASSY, and reconnect them. 2 Registration front actuator, registration rear actuator or paper eject actuator not operating smoothly or catching in some position. Ensure smooth operation of the registration front actuator, registration rear actuator or paper eject actuator and ensure they are not catching in any positions. 3 Paper eject sensor PCB failure Check the sensor performance following the procedure described in "Maintenance mode 32". If any problem occurs, replace the eject sensor PCB ASSY. 4 Registration front sensor PCB failure Check the sensor performance following the procedure described in "Maintenance mode 32". If any problem occurs, replace the registration front sensor PCB ASSY. 5 Registration rear sensor PCB failure Check the sensor performance following the procedure described in "Maintenance mode 32". If any problem occurs, replace the registration rear sensor PCB ASSY. 6 Registration ground spring failure Re-assemble the registration ground spring. 7 Main PCB failure Replace the main PCB ASSY.

• Code: 8A
• Description: Paper jam in Tray 1 (T1)
  (It is detects by the registration front sensor)
• Causes:
• Remedy: • Check if the paper is jammed in the tray. If jammed, remove it. • Adjust the paper guide corresponding to the paper size. • Check if too much paper is loaded in the tray. 1 Harness connection failure of registration front sensor PCB ASSY Check the harness connection of the registration front sensor PCB ASSY in the appropriate tray, and reconnect it. 2 Paper feed roller worn out Replace the paper feed roller. 3 Registration front sensor PCB failure Check the sensor performance following the procedure described in "Maintenance mode 32". If any problem occurs, replace the registration front sensor PCB ASSY. 4 Main PCB failure Replace the main PCB ASSY.

• Code: 8D
• Description: Paper jam near paper eject tray
  (When power on, it is detects by the eject sensor.)
• Causes:
• Remedy: • Remove the jammed paper near the paper eject tray or the back cover. • Close the fuser cover. 1 Paper eject actuator not operating smoothly catching in some position. Re-assemble the paper eject actuator. Ensure the paper eject sensor operates smoothly. 2 Eject sensor PCB ASSY failure Replace the eject sensor PCB ASSY. 3 Main PCB failure Replace the main PCB ASSY.