• Code: E066-0012
• Description: Primary Charging Wire Shutter error 2 when cleaning the Pre-transfer Charging Wire. The Pre-transfer Charging Wire Shutter HP Sensor (PS93) remained to be detected although 10 seconds have passed since the Pre-transfer Charging Wire Shutter started its operation
• Remedy: 1. Check connection of the Pre-transfer Charging Wire Shutter HP Sensor (PS93). 2. Replace the Pre-transfer Charging Wire Shutter HP Sensor (PS93). 3. Check shutter mechanism of the Pre-transfer Charging Assembly. 4. Replace the Pre-transfer Charging Assembly. 5. Replace the DC Controller PCB.

• Code: E066-0023
• Description: Error in the Pre-transfer Charging Wire Shutter position during rotation of the Bk Drum. Faulty position of the Pre-transfer Charging Wire Shutter was detected while the Bk Drum was rotating.
• Remedy: 1. Check connection of the Pre-transfer Charging Wire Cleaning Motor (M2). 2. Replace the Pre-transfer Charging Wire Cleaning Motor (M2). 3. Check connection of the Pre-transfer Charging Wire Shutter HP Sensor (PS93). 4. Replace the Pre-transfer Charging Wire Shutter HP Sensor (PS93). 5. Check shutter mechanism of the Pre-transfer Charging Assembly. 6. Replace the Pre-transfer Charging Assembly. 7. Replace the DC Controller PCB.

• Code: E073-0001
• Description: Host machine interlock failure. Interlock at 24 V cannot be detected in the condition where all of the front cover, left lower cover, and manual feed cover are closed.
• Remedy: 1. Check whether shorting does not occur to the harness of the interlock group. If it occurs, replace the harness. 2. Replace the relay board. (Blowout at the relay PCB (UN7)) 3. Replace the interlock switch. • Front door open/close switch 1 (SW1) • Front door open/close switch 2 (SW2) • Manual feeding unit open/close switch (SW3) • Paper delivery door open/close switch (SW4)

• Code: E074-0001
• Description: Primary transfer roller detachment/attachment error. The primary transfer roller attachment/detachment HP sensor (PS4) cannot detect the home position within a specified period
• Remedy: 1. Check the connection between the primary transfer roller detachment HP sensor (PS4) and the ITB relay PCB (UN28). (Connector, Breaking (shorting)) Sensor side: J7113 PCB side: J2701 2. Check the connection between the ITB relay PCB and the DC controller PCB. (Connector, Breaking (shorting)) ITB relay PCB: J2700, J8050 DC controller PCB: J1241, J8010 3. Replace the primary transfer roller detachment HP sensor. 4. Check the link parts of the primary transfer roller (pressure release lever, link, cam). If foreign matters are found, remove them. If they are soiled with toner, etc., perform cleaning (when the parts do not move smoothly due to dirt). 5. Check whether the gear is not damaged. If it is damaged, replace the attachment/detachment drive unit (FM3-4905).

• Code: E075-0000
• Description: Steering HP error. The home position of the steering roller cannot be detected. It cannot move from the home position
• Remedy: 1. Check the connection between the steering drive HP sensor (PS3) and the ITB relay PCB (UN28). (Connector, Breaking (shorting)) Sensor side: J7416, J8045 PCB side: J2701 2. Check the connection between the steering drive motor (M4) and the ITB relay PCB. (Connector, Breaking (shorting)) Sensor side: J7414, J8044 PCB side: J2701 3. Replace the parts. • Steering drive HP sensor • Steering drive motor

• Code: E075-0001
• Description: ITB displacement sensor lower limit error. The output value of the ITB displacement sensor (PS2) continues to be the lower limit value
• Remedy: 1. Check the connection between the ITB displacement sensor (PS2) and the ITB relay PCB (UN28). (Connector, Breaking (shorting)) Sensor side: J7415 PCB side: J2702 2. Clean the ITB displacement sensor. 3. Replace the parts.

• Code: E075-0002
• Description: ITB displacement sensor upper limit error. The output value of the ITB displacement sensor (PS2) continues to be the upper limit value
• Remedy: 1. Check whether the ITB displacement sensor (PS2) and the ITB displacement sensor flag are installed properly. • Isn’t the ITB displacement sensor flag inserted under the ITB? • Is the ITB displacement sensor installed correctly? 2. Replace the parts. • Replace the ITB displacement sensor flag (if the flag is damaged). • Replace the ITB displacement sensor. • Replace the ITB. (Replace the ITB of which edge is damaged.) • Replace the steering control mechanism parts. (Pressure spring removed from the steering arm, etc.)

• Code: E077-0001
• Description: Secondary transfer external roller detachment/attachment error. The secondary transfer roller attachment/detachment HP sensor (PS22) cannot detect the home position within a specified period.
• Remedy: 1. Check the connection between the secondary transfer roller attachment/detachment HP sensor (PS22) and the fixing feed driver (UN5). (Connector, Breaking (shorting)) Sensor side: J7214, J8102 PCB side: 1509 2. Check the connection between the fixing feed driver and the DC controller PCB. (Connector, Shorting) Fixing feed driver: J1510 DC controller PCB: J1215 3. Check the connection between the secondary transfer roller detachment motor (M31) and the pickup feed driver PCB (UN4). (Connector, Breaking (shorting)) Motor side: J7003 DC controller interface side: 1409 4. Check the connection between the pickup feed driver PCB and the DC controller PCB. (Connector, Breaking (shorting)) Pickup feed driver PCB: J1401 DC controller PCB: J1215 5. Check the installation condition of the detachment mechanism assemblies (cam, arm, secondary transfer external roller holder). Check the condition of the attachment/detachment cam mechanism assembly. 6. Replace the secondary transfer roller attachment/ detachment HP sensor. 7. Check the drive gear. -> Replace the gear. 8. Replace the secondary transfer roller detachment motor. 9. Replace the drive unit