• Code: CF10
• Description: <Undefined error code processing> <Communication module SRAM writing failure>
• Remedy: <Undefined error code processing> MJ-1022/1023/1024 1) Is the error recovered when the power of the equipment is turned OFF and then back ON? 2) If not as in step 1, check if the LGC board and IPC board are connected correctly. 3) If the error has still not been recovered in step 2, check if there is any defect in the LGC board, IPC board or finisher control board. If not, replace the LGC board, IPC board or finisher control board.
  <Communication module SRAM writing failure> MJ-1101 1) Is the error recovered when the power of the equipment is turned OFF and then back ON? 2) Check if the MJ-1101 (08-1912) is set as the specified finisher on the equipment. 3) Check if the harness connecting the converter PC board and the finisher controller PC board is disconnected or open circuited. 4) Check if the conductor pattern on the converter PC board is open circuited or short circuited. 5) Check if the conductor pattern on the finisher controller PC board is open circuited or short circuited. 6) Try to update the finisher firmware again. 7) Replace the converter PC board. 8) Replace the finisher control PC board.
  MJ-1101 (when MJ-6101 is connected) 1) Is the error recovered when the power of the equipment is turned OFF and then back ON? 2) Check if the MJ-1101 (08-1912) is set as the specified finisher on the equipment. 3) Check if the harness connecting the converter PC board and the finisher controller PC board is disconnected or open circuited. 4) Check if the harness connecting the hole punch control PC board and the finisher control PC board is disconnected or open circuited. 5) Check if the conductor pattern on the converter PC board is open circuited or short circuited. 6) Check if the conductor pattern on the finisher controller PC board is open circuited or short circuited. 7) Check if the conductor pattern on the hole punch control PC board is open circuited or short circuited. 8) Try to update the finisher firmware again. 9) Replace the converter PC board. 10)Replace the finisher control PC board. 11)Replace the hole punch control PC board.

• Code: CF20
• Description: Toner density detion voltage abnormality
• 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 detion voltage abnormality
• 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
• 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

• Code: CF50
• Description: Color auto-toner sensor abnormality
• Remedy: Are the connector of color auto-toner sensor, joint connector and connector CN356 on the LGC board connected normally? ↓→ NO → 1) Reconnect the connectors. 2) Correct or replace if the connector pins are disconnected or harnesses are open circuited. YES Are the color auto-toner sensor and reference plate stained? → YES → Clean them. NO Is the color auto-toner sensor shutter solenoid working normally? (Perform the output check: 03-125/175) ↓→ 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) Check if the conductor pattern on the LGC board is short circuited or open circuited. 5) Replace the color auto-toner sensor shutter solenoid. 6) Replace the LGC board. 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) Check if the conductor pattern on the LGC board is short circuited or open circuited. 2) Replace the LGC board. 3) Replace the reference plate and perform “Initialization of color auto-toner sensor light amount correction target value (05-207)”. 4) Replace the color auto-toner sensor and perform “Enforced correction of color auto-toner sensor light amount (05-208)”.

• Code: F070
• Description: Communication error between System-CPU and Engine-CPU
• Remedy: (1) Check if the harness connecting the SYS board and LGC board is disconnected or open circuited. (2) Check the version of the system ROM on the SYS board. (3) Check the version of the engine ROM version on the LGC board. (4) Replace the SYS board. (5) Replace the LGC board.

• Code: F090
• Description: SRAM abnormality on the SYS board
• Remedy: (1) Turn the power OFF and start up the Setting Mode (08). (2) When the message “SRAM ERROR DOES IT INITIALIZE?” is displayed on the LCD, press the [INITIALIZE] button. (SRAM is cleared.) (3) Turn the power OFF and then back ON. If the error is not recovered, replace the SYS board.

• Code: F091
• Description: NVRAM abnormality on the SYS board
• Remedy: (1) Turn the power OFF and start up the Setting Mode (08). (2) When the message “NVRAM ERROR DOES IT INITIALIZE?” is displayed on the LCD, press the [INTERRUPT] or [INITIALIZE] button. (NVRAM is initialized.) (3) Perform the panel calibration (08-692). Note: When the NVRAM is initialized, the scanner and image processing related adjustments are also initialized. Readjust them after the NVRAM initialization. (4) Turn the power OFF and then back ON. If the error is not recovered, replace the NVRAM on the SYS board.