• Code: CE40
• Description: Image quality control test pattern abnormality
• Remedy: (1) Use "Image quality control abnormal detion counter Y to K display/0 clearing (08-573 to 576)" to check the abnormal occurring condition for each color. (2) Check “Output value display of image quality sensor / Low-density pattern (05-391-0 to 3)” to check if the low-density pattern abnormality occurs for each color. The values under 320 for Y, M and C, and under 220 for K are defined as low-density pattern abnormality. (3) Check “Output value display of image quality sensor / High-density pattern (05-390-0 to 3)” to check if the high-density pattern abnormality occurs for each color and identify the color which pattern is abnormal. If the value is 630 or above, it is defined as high-density pattern abnormality. (4) Set the values of “Image quality closed-loop control / Contrast voltage (08-556)” and “Image quality closed-loop control / Laser power (08-557)” to “0” (Invalid). (5) Perform “Enforced performing of image quality open-loop control (05-394)”. (6) Output the image quality control test pattern (04-270) more than one time and check the patch of the color identified in step (3) to see if the image is abnormal (Note). (7) Replace the image quality sensor. (8) Set the values of “Image quality closed-loop control / Contrast voltage (08-556)” and “Image quality closed-loop control / Laser power (08-557)” to “1” (Valid). (9) Perform “Enforced performing of image quality open-loop control (05-394)” and make sure it is completed normally. (Error [CE40] does not appear.) Then perform “Automatic gamma adjustment“ ( Chapter 3.5.1 and 3.6.1). (10) Clear all "Image quality control abnormal detion counter Y to K display/0 clearing (08-573 to 576)". Note: Abnormal image: Blank print, Solid print, White banding, Color banding, White spots, Poor transfer, Uneven image density, Faded image (low density), Uneven light distribution, Blotched image.

• Code: CE50
• Description: Temperature/humidity sensor abnormality
• Remedy: Is the connector CN333 on the LGC board or the connector of the temperature/humidity sensor disconnected? Is the harness between the LGC board and the temperature/humidity sensor disconnected ? → YES→ Connect the connector securely. Replace the harness. NO 1) Replace the temperature/humidity sensor. 2) Replace the LGC board.

• Code: CE90
• Description: Drum thermistor abnormality
• Remedy: Is the connector CN333 on the LGC board, or the connector of the drum thermistor disconnected? Is the harness between the LGC board and the drum thermistor disconnected? → YES→ Connect the connector securely. Replace the harness. NO 1) Replace the drum thermistor. 2) Replace the LGC board.

• Code: CEA0
• Description: Revolver home position detion abnormality
• Remedy: Is the revolver home position sensor working properly? (Perform the input check: 03-[FAX]ON/[2]/[C]) ↓→ NO → 1) Check if the connector or joint connector of the revolver home position sensor is disconnected. 2) Check if the connector CN331 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 revolver home position 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: CEB0
• Description: Black developer unit lifting movement abnormality
• Remedy: Black developer unit lifting movement abnormality Check the timing of the black developer lifting clutch (stop position), and adjust it if it deviates. → 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 detion sensor and black developer contact timing detion 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 detion sensor or black developer contact timing detion 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 detion sensor and black developer contact timing detion 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 detion abnormality
• 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 detion 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 detion 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 detion 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, CEE1
• Description: [CEE0] Transfer belt position detion abnormality (Normal speed) [CEE1] Transfer belt position detion abnormality (When decelerating)
• 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
• 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.