• Code: CEB0
• Description: Black developer unit lifting movement abnormality: The black developer unit does not move up or down normally (lifting cam does not operate normally).
• Remedy: Check the timing of the black developer lifting clutch (stop position), and adjust it if it deviates. ( "3.11.3 Black developer unit lift up/down timing adjustment") → Is the black developer lifting clutch working properly? (Perform the output check: 03-433) ↓→ NO → 1) Check if the connector of the black developer lifting clutch is disconnected. 2) Check if the connector CN339 on the LGC board is disconnected. 3) Check if the connector pins are disconnected or the wires of harnesses are open circuited. 4) Check if the conductor pattern on the LGC board is short circuited or open circuited. 5) Replace the black developer lifting clutch. 6) Replace the LGC board. YES Are the black developer contact position detection sensor and black developer contact timing detection sensor working properly? (Perform the input check: 03-[FAX]ON/[1]/[C], /[1]/[B] ↓→ NO → 1) Check if the connectors of the black developer contact position detection sensor or black developer contact timing detection sensor are disconnected. 2) Check if the connector CN333 on the LGC board is disconnected. 3) Check if the connector pins are disconnected or the wires of harnesses are open circuited. 4) Check if the conductor pattern on the LGC board is short circuited or open circuited. 5) Replace the black developer contact position detection sensor and black developer contact timing detection sensor. 6) Replace the LGC board. YES 1) Check if the conductor pattern on the LGC board is short circuited or open circuited. 2) Replace the LGC board.

• Code: CEC0
• Description: 2nd transfer roller position detection abnormality: The 2nd transfer roller does not contact/release normally.
• Remedy: Is the 2nd transfer roller contact clutch working properly? (Perform the output check: 03-435) ↓→ NO → 1) Check if the connector or joint connectors of the 2nd transfer contact clutch are disconnected. 2) Check if the connector CN338 on the LGC board is disconnected. 3) Check if the connector pins are disconnected or the wires of harnesses are open circuited. 4) Check if the conductor pattern on the LGC board is short circuited or open circuited. 5) Replace the 2nd transfer roller contact clutch. 6) Replace the LGC board. YES Is the 2nd transfer roller position detection sensor working properly? (Perform the input check:03-[FAX]ON/[1]/[A]) ↓→ NO → 1) Check if the connector or joint connectors of the 2nd transfer roller position detection sensor are disconnected. 2) Check if the connector CN345 on the LGC board is disconnected. 3) Check if the connector pins are disconnected or the wires of harnesses are open circuited. 4) Check if the conductor pattern on the LGC board is short circuited or open circuited. 5) Replace the 2nd transfer roller position detection sensor. 6) Replace the LGC board. YES 1) Check if the conductor pattern on the LGC board is short circuited or open circuited. 2) Replace the LGC board.

• Code: CEE0
• Description: Transfer belt position detection abnormality (normal speed): The home position of the transfer belt cannot be detected.
• Remedy: Is there any stain or scratch on the reflection tape inside the transfer belt? ↓→ YES → Clean the transfer belt or replace it. Replace the cleaning pad if it is excessively stained. NO Are the transfer belt home position sensors-1 and -2 stained? → YES → Clean them. NO Are the transfer belt home position sensors-1 and -2 working properly? (Perform the input check:03-[FAX]ON/[9]/[H]) ↓→ NO → 1) Check if the connectors or joint connectors of the transfer belt home position sensors-1 and -2 are disconnected. 2) Check if the connector CN361 on the LGC board is disconnected. 3) Check if the connector pins are disconnected or the wires of harnesses are open circuited. 4) Check if the conductor pattern on the LGC board is short circuited or open circuited. 5) Replace the transfer belt home position sensor-1 and -2. 6) Replace the LGC board. YES 1) Check if the conductor pattern on the LGC board is short circuited or open circuited. 2) Replace the LGC board.

• Code: CEE1
• Description: Transfer belt position detection abnormality (when decelerating): Reference position of the transfer belt cannot be detected.
• Remedy: Is there any stain or scratch on the reflection tape inside the transfer belt? ↓→ YES → Clean the transfer belt or replace it. Replace the cleaning pad if it is excessively stained. NO Are the transfer belt home position sensors-1 and -2 stained? → YES → Clean them. NO Are the transfer belt home position sensors-1 and -2 working properly? (Perform the input check:03-[FAX]ON/[9]/[H]) ↓→ NO → 1) Check if the connectors or joint connectors of the transfer belt home position sensors-1 and -2 are disconnected. 2) Check if the connector CN361 on the LGC board is disconnected. 3) Check if the connector pins are disconnected or the wires of harnesses are open circuited. 4) Check if the conductor pattern on the LGC board is short circuited or open circuited. 5) Replace the transfer belt home position sensor-1 and -2. 6) Replace the LGC board. YES 1) Check if the conductor pattern on the LGC board is short circuited or open circuited. 2) Replace the LGC board.

• Code: CEF0
• Description: Revolver motor abnormality: Revolver motor is not rotating or revolver is not moving normally.
• Remedy: Is the revolver motor working? (Perform the output check: 03-450) ↓→ NO → 1) Check if the connector of the revolver motor is disconnected. 2) Check if the connectors CN435 and CN434 on the DRV board are disconnected. 3) Check if the connector CN331 on the LGC board is disconnected. 4) Check if the connector pins are disconnected or the harnesses are open circuited. 5) Check if the conductor patterns on the DRV board and LGC board are short circuited or open circuited. 6) Replace the revolver motor. 7) Replace the DRV board and LGC board. YES 1) Check if the teeth of the revolver motor gear or the revolver unit gear do not get chipped or cracked. 2) Check if the conductor patterns on the DRV board and LGC board are short circuited or open circuited. 3) Replace the DRV board and LGC board.

• Code: CF20
• Description: Toner density detection voltage abnormality: The output value of the color auto-toner sensor in printing is out of a specified range.
• Remedy: (1) Specify the developer unit with the abnormality by checking the setting values of 08-824-0 to 08- 824-2. (When the value is “1”, an abnormality occurs.) (2) Correct the defective section of the unit specified in (1) with the following procedure. Is the developer material transported properly? Is the form of magnetic brush is normal? ↓→ NO → 1) Check if the amount of the developer material is normal or any foreign matter is mixed in. 2) Correct the transport mechanism of developer material. 3) Check the polar position and correct if necessary. YES Is the color auto-toner sensor stained? → YES → Clean it. NO Is the color auto-toner sensor shutter solenoid working normally? (Perform the output check: 03-125/175) Is the color auto-toner sensor working? ↓→ NO → 1) Check if the connectors or joint connectors of the color auto-toner sensor shutter solenoid and color auto-toner sensor are disconnected. 2) Check if the connector CN332 on the LGC board is disconnected. 3) Check if the connector pins are disconnected or the harnesses are open circuited. 4) Replace the color auto-toner sensor shutter solenoid. 5) Check if the conductor pattern on the LGC board is short circuited or open circuited. 6) Replace the LGC board. 7) Replace the color auto-toner sensor and perform “Enforced correction of color auto-toner sensor light amount (05-208)”. YES Is the color auto-toner sensor shutter opening position correct? (Perform the output check: 03-125/175) ↓→ NO → Adjust the install position of solenoid so that the sensor holder will touch and face the positioning component when opening the shutter. YES 1) Check if the conductor pattern on the LGC board is short circuited or open circuited. 2) Replace the LGC board. (3) When the correction is completed, reset the values of 08-824-0 to 08-824-2 from “1” to “0” to clear the abnormality.

• Code: CF30
• Description: Reference plate detection voltage abnormality: The output value of the color auto-toner sensor against the reference plate is out of a specified range at the light amount correction during an auto-toner adjustment or when a print job has finished.
• Remedy: Are the reference plate and color auto-toner sensor stained? → YES→ Clean them. NO Is the color auto-toner sensor shutter solenoid working normally? (Perform the output check: 03-125/175) Is the color auto-toner sensor working? ↓→ NO → 1) Check if the connectors or joint connectors of the color auto-toner sensor shutter solenoid and color auto-toner sensor are disconnected. 2) Check if the connector CN332 on the LGC board is disconnected. 3) Check if the connector pins are disconnected or the harnesses are open circuited. 4) Replace the color auto-toner sensor shutter solenoid. 5) Check if the conductor pattern on the LGC board is short circuited or open circuited. 6) Replace the LGC board. 7) Replace the color auto-toner sensor and perform “Enforced correction of color auto-toner sensor light amount (05-208)”. YES Is the color auto-toner sensor shutter closing position correct? (Perform the output check: 03-125/175) ↓→ NO → Adjust the install position of solenoid so that the gap between the sensor holder and stopper will be 1.0 mm when closing the shutter. YES 1) Replace the LGC board. 2) Replace the reference plate and perform “Initialization of color auto-toner sensor light amount correction target value (05-207)”.

• Code: CF40
• Description: Light amount correction voltage abnormality: The light amount correction is not finished normally during an auto-toner adjustment or when a print job has finished, or the output value of the sensor is out of a specified range when the light amount correction has finished.
• Remedy: (1) Specify the developer unit with the abnormality by checking the setting values of 08-823-0 to 08- 823-2. (When the value is “1”, an abnormality occurs.) (2) Correct the defective section of the unit specified in (1) with the following procedure. Is the developer unit inserted properly? → NO → Insert it properly. YES Is the developer material transported properly? Is the form of magnetic brush is normal? ↓→ NO → 1) Check if the amount of the developer material is normal or any foreign matter is mixed in. 2) Correct the transport mechanism of developer material. 3) Check the polar position and correct if necessary. YES Is the color auto-toner sensor stained? → YES → Clean it. NO Is the color auto-toner sensor shutter solenoid working normally? (Perform the output check: 03-125/175) Is the color auto-toner sensor working? ↓→ NO → 1) Check if the connectors or joint connectors of the color auto-toner sensor shutter solenoid and color auto-toner sensor are disconnected. 2) Check if the connector CN332 on the LGC board is disconnected. 3) Check if the connector pins are disconnected or the harnesses are open circuited. 4) Replace the color auto-toner sensor shutter solenoid. 5) Check if the conductor pattern on the LGC board is short circuited or open circuited. 6) Replace the LGC board. 7) Replace the color auto-toner sensor and perform “Enforced correction of color auto-toner sensor light amount (05-208)”. YES Is the color auto-toner sensor shutter opening position correct? (Perform the output check: 03-125/175) ↓→ NO → Adjust the install position of solenoid so that the sensor holder will touch and face the positioning component when opening the shutter. YES 1) Replace the LGC board. 2) Replace the reference plate and perform “Initialization of color auto-toner sensor light amount correction target value (05-207)”. (3) When the correction is completed, reset the values of 08-823-0 to 08-823-2 from “1” to “0” to clear the abnormality.