• Code: E51
• Description: ADU stack jam (paper not reaching the ADU entrance sensor)
• Remedy: Open the ADU. Is there any paper in front of the ADU entrance sensor? YES Remove the paper. NO Is the ADU entrance sensor working? (Perform the input check in the test mode: 03-[FAX]OFF/[1]/[H]) NO 1. Check if the connector of the ADU entrance sensor is disconnected. 2. Check if either of the connectors CN211 or CN214 on the ADU board is disconnected. 3. Check if the connector J316 on the LGC board is disconnected. 4. Check if the connector pins are disconnected and the harnesses are open-circuited. 5. Check if the conductor patterns on the ADU board and LGC board are short- or open-circuited. 6. Replace the ADU entrance sensor. 7. Replace the ADU board. 8. Replace the LGC board. YES Is the exit motor (rotating in reverse) working? (Perform the output check in the test mode: 03-121/171) NO 1. Check if the connector of the exit motor is disconnected. 2. Check if the connector J315 on the LGC board is disconnected. 3. Check if the connector pins are disconnected and the harnesses are opencircuited. 4. Check if the conductor pattern on the LGC board is short- or open-circuited. 5. Replace the exit motor. 6. Replace the LGC board. Is the ADU motor working? (Perform the output check in the test mode: 03-110/160) NO 1. Check if the connector of the ADU motor is disconnected. 2. Check if any of the connectors CN211, CN212 and CN215 on the ADU board is disconnected. 3. Check if the connector J316 on the LGC board is disconnected. 4. Check if the connector pins are disconnected and the harnesses are open-circuited. 5. Check if the conductor patterns on the ADU board and LGC board are short- or open-circuited. 6. Replace the ADU exit sensor. 7. Replace the ADU board. 8. Replace the LGC board. YES Check the rollers in the ADU and the exit roller of the main unit. Replace them if they are worn out.

• Code: E52
• Description: ADU transport jam (paper not reaching the ADU exit sensor)
• Remedy: Open the ADU. Is there any paper in front of the ADU exit sensor? YES Remove the paper. NO Is the ADU exit sensor working? (Perform the input check in the test mode: 03-[FAX]OFF/[1]/[G]) NO 1. Check if the connector of the ADU exit sensor is disconnected. 2. Check if either of the connectors CN211 or CN213 on the ADU board is disconnected. 3. Check if the connector J316 on the LGC board is disconnected. 4. Check if the connector pins are disconnected and the harnesses are open-circuited. 5. Check if the conductor patterns on the ADU board and LGC board are short- or open-circuited. 6. Replace the ADU exit sensor. 7. Replace the ADU board. 8. Replace the LGC board. YES Is the ADU clutch working? (Perform the output check in the test mode: 03-222) NO 1. Check if the connector of the ADU clutch is disconnected. 2. Check if the connector J316 on the LGC board is disconnected. 3. Check if the connector pins are disconnected and the harnesses are open-circuited. 4. Check if the conductor pattern on the LGC board is short- or open-circuited. 5. Replace the ADU clutch. 6. Replace the LGC board. YES Check the rollers in the ADU. Replace them if they are worn out.

• Code: E55
• Description: Paper remaining on the transport path when CRUN is OFF
• Remedy: Open the cover of the unit/area whose picture is flashing on the control panel. Is there any paper on the transport path? YES Remove the paper. NO Is the sensor in the jamming area working? (Perform the input check in the test mode: refer to the following table) NO 1. Check if the connector of the sensor is disconnected. 2. Check if any of the connectors on the LGC board is disconnected. 3. Check if the connector pins are disconnected and the harnesses are open-circuited. 4. Check if the conductor pattern on the LGC board is short- or open-circuited. 5. Replace the sensor. 6. Replace the LGC board. YES Replace the LGC board.
  Registration area Jam access cover Registration sensor 03-[FAX]ON/[2]/[A] Upper feed sensor 03-[FAX]OFF/[6]/[E] Exit area Jam access cover Exit sensor 03-[FAX]ON/[2]/[B] ADU ADU ADU entrance sensor 03-[FAX]OFF/[1]/[H] ADU exit sensor 03-[FAX]OFF/[1]/[G] Feeding area Side cover Lower feed sensor 03-[FAX]OFF/[7]/[E] (main unit) LCF LCF side cover LCF feed sensor 03-[FAX]OFF/[5]/[G] PFP PFP side cover PFP upper feed sensor 03-[FAX]OFF/[2]/[D] PFP lower feed sensor 03-[FAX]OFF/[4]/[D] Relay unit Relay unit Relay unit transport sensor-1 03-[FAX]ON/[4]/[H] Relay unit transport sensor-2 03-[FAX]ON/[3]/[E] Finisher Finisher door Sensors in the finisher

• Code: E71
• Description: Original feeding jam
• Remedy: Are the pickup roller, feed roller and separation roller dirty? YES Clean the rollers. NO Is the transport force of the rollers insufficient? YES Replace the rollers. NO Is the original abnormally curled or folded? YES Flatten and set it again

• Code: E72
• Description: Original transport jam
• Remedy: Are the registration roller, read roller and exit roller dirty? YES Clean the rollers.

• Code: E73
• Description: Original discharging jam
• Remedy: Are the registration roller, read roller and exit roller dirty? YES Clean the rollers.

• Code: E74
• Description: Original reversing jam
• Remedy: Are the read roller and reverse roller dirty? YES Clean the rollers. NO Is the reverse flapper working properly? NO Adjust the reverse solenoid.

• Code: E91
• Description: Leading edge of paper not reaching the relay unit transport sensor-1
• Remedy: Is there any paper remaining inside the relay unit? YES Remove the paper. NO Are the relay unit transport sensors-1 and -2 working? (Perform the input check in the test mode: 03-[FAX] ON/[4][H], [3][E]) NO 1. Check if the connectors of the relay unit transport sensors-1 and -2 are disconnected. 2. Check if the connector J573 of the relay unit is disconnected. 3. Check if the connector J315 on the LGC board is disconnected. 4. Check if the connector pins are disconnected and the harnesses are open-circuited. 5. Check if the conductor pattern on the LGC board is short- or open-circuited. 6. Replace the relay unit transport sensors. 7. Replace the LGC board. YES Is the relay unit gate solenoid working? (Perform the output check in the test mode: 03-232) NO 1. Check if the connector J573 of the relay unit is disconnected. 2. Check if the connector J315 on the LGC board is disconnected. 3. Check if the connector pins are disconnected and the harnesses are open-circuited. 4. Replace the relay unit gate solenoid. 5. Replace the LGC board. YES Does the transport roller of the relay unit work when the main motor is rotated? (Perform the output check in the test mode: 03-101/151) NO Check the drive system of the main unit and relay unit. YES Check if the rollers in the relay unit are worn out.