• Code: CE40
• Description: Image quality control test pattern abnormality: The test pattern is not formed normally.
• Remedy: (1) Use “Image quality control abnormal detection 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 / 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 628 or above, it is defined as high-density pattern abnormality. High-density pattern abnormality • Check if the laser shutter is working properly. <Procedure> 1. Take off the process unit so that the laser shutter can be easily seen. * Clean around the laser shutter if the developer has been spilled over. 2. While pressing the digital keys [0] and [3] simultaneously, turn the power ON. 3. Key in “201”. 4. Press the [START] button and check if the shutter is opened and then closed (reciprocating 1cycle). • Check if the developer unit has been installed properly. 1. Visually check the installation status of the developer unit, and correct it if there is any abnormality. | To (8) (If you have already performed this checking cycle once, proceed to step (3).) (3) Set the values of “Image quality closed-loop control / Contrast voltage (08-556)” and “Drum surface potential sensor control setting (08-2561)” to “0” (Invalid). (4) Perform “Enforced performing of image quality open-loop control (05-394)”. (5) Output the image quality control test pattern (04-270) more than one time and the list print ([9][START]) in the adjustment mode (05), and check the patch of the color identified in step (1) to see if the image is abnormal 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. * Blank print: including when one of the YMCK colors is not printed. Correct the abnormal image. Proceed to step (7). (6) Replace the image quality sensor or LGC board. (7) 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). (8) Perform “Automatic initialization of image quality control (05-396)” and make sure it is completed normally. (Error [CE40] does not appear.) Then perform “Automatic gamma adjustment”. (9) Clear all “Image quality control abnormal detection counter Y to K display/0 clearing (08-573 to 576)”. (10) Check if any of the springs for supplying power to the transfer belt unit is deformed. Replace the spring if it is deformed.

• Code: CE41
• Description: Image quality TRC control test pattern abnormality: The image quality TRC control test pattern is not printed normally.
• Remedy: (1) Check each value of the subcodes 2 (Y), 5 (M), 8 (C) and 11 (K) of the code 05-2803. * If all the values of Y, M, C and K are 628 or less, proceed to step 2. If any of them is over 628, follow the procedure below. (High density pattern abnormality) (2) Check each value of the subcodes 0 (Y), 3 (M), 6 (C) and 9 (K) of the code 05-2800. * If all the values of Y, M, C and K are 180 or over , proceed to step 3. If any of them is less than 180, follow the procedure below. (Low density pattern abnormality) | When an error occurs: Check and correct it accordingly. (1)-1 Set both values of the codes 08-2600 and 08-8103 to 0. (1)-2 Print the test chart 04-270 with A3/LD for more than 2 pages. Then perform list printing ([9]+[START]) to check if no abnormality is found in the image density. If any abnormality is found, correct it referring to "25.5 Troubleshooting for the Image" (1)-3 .Check if the process unit (EPU tray) and the developer unit are installed properly. (1)-4 Check if any toner or developer material is spilt around the laser shutter. Clean if so. (1)-5 Check the center position adjustment for each drawer is within the range preset at the shipment (rear side: 0-3 mm). "[B] Adjustment of the gear holder" (1)-6 Adjust the image dimension with A3/LD. "[A] Reproduction ratio of primary scanning direction (Image clock fine adjustment (Printer))" "[B] Primary scanning data laser writing start position (Laser writing start position (Printer))" (1)-7 Return both values of the codes 08-2600 and 08-8103 to 1. Then proceed to step 3. If it is the second time, proceed to step 4. (2)-1 Set both values of the codes 08-2600 and 08-8103 to 0. (2)-2 Print the test chart 04-270 with A3/LD for more than 2 pages. Then perform list printing ([9]+[START]) to check that no abnormality is found in the image density. If any abnormality is found, correct it referring to " SERVICE MANUAL "25.5 Troubleshooting for the Image" (2)-3 Return both values of the codes 08-2600 and 08-8103 to 1. Then proceed to step 3. If it is the second time, proceed to step 4. (3) Perform the automatic gamma adjustment. If the adjustment is normally finished, this is the end of the procedure. If the error CE41 still occurs, repeat the procedure from step 1. (4) Check if the harness between the connector CN423 on the IMG board and the connector CN319 on the LGC board is disconnected or open circuited. Correct if so. (5) Check if the harness between the connector CN424 on the IMG board and the connector CN320 on the LGC board is disconnected or open circuited. Correct if so. (6) Check if the conductor patterns on the IMG board and the LGC board are short circuited or open circuited. (7) If no abnormality is found in steps 4 to 6 above, replace the IMG board. (8) Perform automatic gamma adjustment. If the adjustment is normally finished, this is the end of the procedure. If the error CE41 still occurs, proceed to step 9. (9) Reinstall the removed IMG board and then replace the LGC board. * Perform automatic gamma adjustment after the board is replaced.

• Code: CE42
• Description: Image quality TRC control test pattern abnormality (EFI printer board): Image quality TRC control test pattern is not printed normally.
• Remedy: (1) Check if the connector between CN135 of the SYS board and CN422 of the IMG board is connected securely. (2) Check if the harness or connector between CN116 and CN132 of the SYS board and the HDD is disconnected or open circuited. Correct if it is. (3) Format the HDD. (Key in “2” in the code 08-690.) (4) Replace the HDD. (5) Replace the SYS board.

• Code: CE50
• Description: Temperature/humidity sensor abnormality: The output value of this sensor is out of a specified range.
• Remedy: Is the connector CN310 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: CE60
• Description: Drum thermistor-Y abnormality: The output value of the drum thermistor-Y is out of a specified range.
• Remedy: (1) Check if there is any abnormality on the connector between the equipment and the EPU tray of the process unit. (05-2788) (2) Is the harness between the LGC board and the drawer connector for developer unit disconnected? (3) Is the harness inside of the developer unit and the harness of the drum thermistor Y or K disconnected? (4) Is the connector CN341 on the LGC board, or the connector of the drum thermistor Y or K disconnected? (5) Replace the drum thermistor Y or K. (6) Replace the EPU board. (7) Replace the LGC board.

• Code: CE71
• Description: Drum phase adjustment abnormality: Drum phase sensors (Color drum phase sensor and K drum phase sensor) are not turned ON after the drum motor was rotated for a specified period of time.
• Remedy: (1) Is the drum shaft rotating normally? (Perform the output check: 03-110 and 03-111) (2) Check if the harness or connector of the color drum phase sensor or the K drum phase senor is disconnected or open-circuited. (3) Is the drum loaded abnormally? (4) Is the drum motor (K)/(YMC) broken? (5) Check if the harness or connector of the drum motor (K)/(YMC) is disconnected or opencircuited. (6) Check if the tooth surface of the transfer belt drive gear is damaged.

• Code: CE90
• Description: Drum thermistor-K abnormality: The output value of the drum thermistor-K is out of a specified range.
• Remedy: (1) Check if there is any abnormality on the connector between the equipment and the EPU tray of the process unit. (05-2788) (2) Is the harness between the LGC board and the drawer connector for developer unit disconnected? (3) Is the harness inside of the developer unit and the harness of the drum thermistor Y or K disconnected? (4) Is the connector CN341 on the LGC board, or the connector of the drum thermistor Y or K disconnected? (5) Replace the drum thermistor Y or K. (6) Replace the EPU board. (7) Replace the LGC board.

• Code: CEC0
• Description: 2nd transfer roller position detection abnormality: The 2nd transfer roller does not contact/release normally.
• Remedy: 519) NO 1. Check if the connector of the 2nd transfer motor is disconnected. 2. Check if the connector CN314 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 motor. 6. Replace the LGC board. YES Is the 2nd transfer roller position detection sensor(S50) working properly? (Perform the input check:03-[All OFF]/[9]/[H]) NO 1. Check if the connector or joint connectors of the 2nd transfer roller position detection sensor are disconnected. 2. Check if the connector CN307 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 there is any abnormality with the mechanical section (sensor's actuator, etc.). 2. Check if the conductor pattern on the LGC board is short circuited or open circuited. 3. Replace the LGC board.