Code :

Code: C4D0
Description: Fuser belt thermopile abnormality
Remedy: 1. Check the thermopile (1) Check if the connector of the thermopile is disconnected. (2) Check if the harnesses of the fuser belt center thermopile and the fuser belt side thermopile are open circuited. (3) Replace the thermopile. 2. Check the LGC board (1) Check if the connector CN333 is disconnected. (2) Check if the conductor pattern on the LGC board is open circuited or short circuited. (3) Replace the LGC board. 3. Cancel the service call After repairing the matter which caused the error [C4D0], turn the power OFF and then back ON to cancel the service call. However, the counter value will be stored until it is written over by the value of the other service call.

Code: C4E0
Description: Fuser unit releasing operation abnormality - Though the pressure roller is released, its position cannot be detected.
Remedy: 1. Is the pressure roller contact/release detection sensor working? (Perform the input check: 03- [FAX]OFF/[3]/[F]) * If it is working properly, proceed to 7. If not, check 2 to 6 below. 2. Is there any foreign matter or damage on the pressure roller contact/release detection sensor? 3. Check if the drawer connector for the fuser unit or any of connectors on the equipment side is disconnected or open-circuited. 4. Check if the harness between the pressure roller contact/release detection sensor and the connector (CN306) on the LGC board is disconnected or open-circuited. 5. Replace the sensor. 6. Replace the LGC board. 7. Is the pressure roller contact/release clutch working? (Perform the output check: 03-273) * If it is working properly, proceed to 12. If not, check 8 to 11 below. 8. Is the drawer connector for the fuser unit or any of connectors on the equipment side is disconnected or open-circuited? 9. Is the harness between the pressure roller contact/release clutch and the connector (CN311) on the LGC board disconnected or open-circuited? 10.Replace the clutch. 11.Replace the LGC board. 12.If there is any mechanical problem on the fuser unit, fix the mechanism.

Code: C4E1
Description: Fuser unit contacting operation abnormality - Though the pressure roller is contacted, its position cannot be detected.
Remedy: 1. Is the pressure roller contact/release detection sensor working? (Perform the input check: 03- [FAX]OFF/[3]/[F]) * If it is working properly, proceed to 7. If not, check 2 to 6 below. 2. Is there any foreign matter or damage on the pressure roller contact/release detection sensor? 3. Check if the drawer connector for the fuser unit or any of connectors on the equipment side is disconnected or open-circuited. 4. Check if the harness between the pressure roller contact/release detection sensor and the connector (CN306) on the LGC board is disconnected or open-circuited. 5. Replace the sensor. 6. Replace the LGC board. 7. Is the pressure roller contact/release clutch working? (Perform the output check: 03-273) * If it is working properly, proceed to 12. If not, check 8 to 11 below. 8. Is the drawer connector for the fuser unit or any of connectors on the equipment side is disconnected or open-circuited? 9. Is the harness between the pressure roller contact/release clutch and the connector (CN311) on the LGC board disconnected or open-circuited? 10.Replace the clutch. 11.Replace the LGC board. 12.If there is any mechanical problem on the fuser unit, fix the mechanism.

Code: C4E2
Description: Fuser belt rotation detection sensor abnormality - The fuser belt does not rotate or incorrectly rotates.
Remedy: 1. Is the fuser belt rotation detection sensor working? (Perform the input check: 03-[FAX]ON/[4]/[F]) * If it is working properly, proceed to 7. If not, check 2 to 6 below. 2. Check if there is any foreign matter or damage on the fuser belt rotation detection sensor. 3. Check if the connector for the fuser unit or any of connectors on the equipment side is disconnected or open-circuited. 4. Check if the harness between the fuser belt rotation detection sensor and the connector (CN306) on the LGC board is disconnected or open-circuited. 5. Replace the sensor. 6. Replace the LGC board. 7. Is the sensing plate of the fuser belt rotation detection sensor damaged? 8. Check if the fuser belt and its drive section have any abnormality.

Code: C550
Description: RADF I/F error: Communication error has occurred between the RADF and the scanner.
Remedy: (1) Check if the harness connecting the RADF board and SLG board is disconnected or open circuited. (2) Check if the conductor pattern on the RADF board is short circuited or open circuited. (3) Check if the conductor pattern on the SLG board is short circuited or open circuited. (4) Replace the RADF board, and then perform the automatic adjustment for the original reading start sensor (05-356). (5) Replace the SLG board.

Code: C560
Description: Communication error between Engine-CPU and PFC board
Remedy: (1) Check if the LGC board and PFC board are connected properly. (2) Check if the conductor pattern on the PFC board is short circuited or open circuited. (3) Check if the conductor pattern on the LGC board is short circuited or open circuited. (4) Replace the PFC board. (5) Replace the LGC board.

Code: C570
Description: Communication error between Engine-CPU and CNV board
Remedy: (1) Check if the LGC board and CNV board are connected properly. (2) Check if the conductor pattern on the CNV board is short circuited or open circuited. (3) Check if the conductor pattern on the LGC board is short circuited or open circuited. (4) Replace the CNV board. (5) Replace the LGC board.