• Code: CA00
• Description: color registration abnormality
• Causes:
• Remedy: 1 Remove the transfer belt unit. "4.7.3 Transfer belt unit (TBU)" 2 Is an image created on the transfer belt? Yes 6 No 3 3 Check if there is any abnormality on the rods of the main charger cleaner. Correct if there is. 4 Check if the drum is rotated properly by turning the coupling of the cleaner unit. Correct the auger and the surrounding hardware if not. 5 LED head • Check the connectors and harnesses between the LGC board (CN380, CN381, CN382, CN383, CN384, CN385, CN386, CN387, CN592, CN593, CN594, CN595, CN596, CN597, CN598, and CN599) and the LED head. • Check if there is any stain or scratch on the LED head. Clean or correct if there is. 6 Check if there is any stain on the image quality sensor (Front) and image quality sensor (Rear). 7 Check if the sensor shutter is working properly. 8 < Invalidating color registration control > • Turn the power ON while [0] and [8] are pressed simultaneously. • Key in “4546”, then press the [START] button. (08-4546: Position adjustment control / Mode setting) • Set the value to “0” (not performed automatically). • Turn the power OFF. 9 < Checking the abnormal status on color registration > • Turn the power ON while [0] and [5] are pressed simultaneously. • Key in “4720”, then press the [START] button. (05-4720: Displaying the cause of color registration detection error) 10 Check the displayed value. When the error [CA00] occurs, the value between 1 and 255 is displayed. (0: Normal completion) (The statuses of total 8 sections (4 colors on the front and rear sides) are displayed.) 1: Y on the rear side detection abnormality (*1) 16 2: Y on the front side detection abnormality (*1) 16 3: Y on the front and rear sides detection abnormality 16 4: M on the rear side detection abnormality (*1) 16 8: M on the front side detection abnormality (*1) 16 12: M on the front and rear sides detection abnormality 16 16: C on the rear side detection abnormality (*1) 16 32: C on the front side detection abnormality (*1) 16 48: C on the front and rear sides detection abnormality 16 64: K on the rear side detection abnormality (*1) 16 85: All colors on the rear side detection abnormality 11 128: K on the front side detection abnormality (*1) 16 170: All colors on the front side detection abnormality 11 192: K on the front and rear sides detection abnormality 16 255: All colors on the front and rear sides detection abnormality 11 Other than the above: Multiple colors detection abnormality Remarks: The adjustment value is the sum of (*1), which, as in the example below, specifies the cause of the detection abnormality. (E.g. 1) 05-4720 --- in case of 72 72 = 64 + 8 → K on the rear side / M on the front side detection abnormality (E.g. 2) 05-4720 --- in case of 146 146 = 128 + 18 = 128 + 16 + 2 → K on the front side / C on the rear side / Y on the front side detection abnormality 16 11 < Checking the status of the image position aligning sensor > Check if the light emitting area of the image position aligning sensor emits LEDs and if the reflected lights on the transfer belt surface are detected by the light receiving area of the image position aligning sensor. 1. Turn the power ON while [0] and [3] are pressed simultaneously. 2. Press the [START] button. 3. Press the [FAX] button, then check how items [A] and [B] are displayed while [1] is pressed. 4. Press the [CLEAR] button. 5. Key in “125”, then press the [START] button. (03-125: Sensor shutter is opened) 6. Key in “126”, then press the [START] button. (03-126: Image position aligning sensor / LED ON) 7. Press the [START] button. 8. Press the [FAX] button, then check how items [A] and [B] are displayed while [1] is pressed. 9. Compare them with the statues of [A] and [B] displayed in (3). - Both [A] and [B] are changed - The image position aligning sensors on both sides are operating normally. - [A] remains same - The image position aligning sensor on the rear side is not operating normally. - [B] remains same - The image position aligning sensor on the front side is not operating normally. - Both [A] and [B] remain same - The image position aligning sensors on both sides are not operating normally. 10.Press the [CLEAR] button. 11.Key in “176”, then press the [START] button. (03-176: Image position aligning sensor / LED OFF) 12.Key in “175”, then press the [START] button. (03-175: Sensor shutter closed) 13.Turn the power OFF. 14.If the image position aligning sensors on both sides are operating normally, proceed to step (23). In other cases, proceed to step (22). 12 Image position aligning sensor • Check the connectors and harnesses (J673, J781) between the image position aligning sensor and the LGC board (CN366). • Check if the light emitting or receiving area of the image position aligning sensor stained with toner. 13 Are the sensor shutters of the image position aligning sensor opening or closing normally? Are they normal without any damage? 1. Take off the transfer belt unit so that the sensor unit can be seen. 2. Turn the power ON while [0] and [3] are pressed simultaneously. 3. The shutter should be opened when “125” is keyed in. It should be closed when “175” is keyed in. Yes 14 No 15 14 Is the light emitting area of the image position aligning sensor emitting LEDs? 1. Key in “125” to open the sensor shutter. 2. The light emitting area of the sensor should emit LEDs when "126" is keyed in. Yes 16 No 15 15 Image position aligning sensor • Connector and harness check • Clean the light emitting and receiving areas of the image position aligning sensor. • If the sensor shutter is damaged, replace it. • If the sensor shutter solenoid is not operating normally, replace the solenoid. 11 16 < Checking with test pattern > • Turn the power ON while [0] and [4] are pressed simultaneously. • Key in “286”, then press the [START] button. • Press the [CLEAR] button after one sheet of test pattern has been exited. • Check if the printed image of the test pattern in each color contains difference in density on its front, center and rear sides, or if there is any image trouble in a whole image. 17 Is the image of the test pattern printed normally without any difference in density on its front and rear sides? Yes 20 No 18 18 Transfer belt and the photoconductive drum Check the contacting status of the transfer belt and the photoconductive drum. 19 19 Developer material Check the amount of the developer material. (Check if the developer material is supplied on the developer sleeve.) 20 20 Is the image printed normally without yellow, magenta, cyan or black streaks in the secondary scanning direction? Yes 22 No 21 21 Check if the main charger wire corresponding to the color of the streaks is stained. 22 22 Is the image printed normally without white streaks in the secondary scanning direction? Yes 24 No 23 23 Check if the LED head is stained. 24 Is a certain color in the printed image turned to black solid? Yes 26 No 25 25 • Abnormality in the main highvoltage transformer corresponding to the color or abnormality in the LED head. • Switch one of 4 main high-voltage transformers which possibly contains abnormality with the one possibly normal. Then print the same test pattern. • If the color which turned into black solid changes along with the replacement of the main highvoltage transformer, this main highvoltage transformer is defined as abnormal. • If the color which turned into black solid does not change, check if the harness between the LGC board and the main high-voltage transformer is broken or if the power is sufficiently supplied to the main charger (breaking of the highvoltage harness or connection defect). If no problem is found, check the LED head. 26 26 If the density level is low on both front and rear sides, is the image printed normally in cases other than noted above? Yes 28 No 27 27 • Check if the photoconductive drum and the transfer belt are rotating. If not, correct their mechanism. • Check if there are abnormal stain, large breaking or scratches on the transfer belt surface. • Check if the connector of the transfer transformer is disconnected. • Check if the high-voltage harnesses of the main high-voltage transformer and the transfer transformer are disconnected. • Check if the harness between the LGC board and the transfer transformer is broken. • Check if the high-voltage joints of the transfer belt unit are securely contacted or if they are not stained. • Check if the high-voltage harness is broken. • Check if the connector of the main high-voltage transformer is disconnected. • Check if the harness between the LGC board and the main highvoltage transformer is broken. • Replace the transfer transformer. • Replace the main high-voltage transformer. 16 28 < Checking with the enforced image position adjustment > Does the error [CA00] occur during the position adjustment control? 1. Turn the power ON while [0] and [5] are pressed simultaneously. 2. Key in “4719”, then press the [START] button. (05-4719: Enforced position adjustment) Yes 29 No 9 29 < Validating the color registration control > Check the operation and correct if necessary. Then be sure to perform the following: 1. Turn the power ON while [0] and [8] are pressed simultaneously. 2. Key in “4546”, then press the [START] button. (08-4546: Position adjustment control / Mode setting) 3. Set the value to “4” (default value). 4. Turn the power OFF. 30 <Checking the image position aligning sensor> Clean the image position aligning sensor (S7, S8). 31 <Checking the power supply> Check if any of the springs for supplying power to the transfer belt unit is deformed. Replace the spring if it is deformed.

• Code: CB00
• Description: Finisher not connected: Communication error has occurred between the equipment and finisher. [MJ-1107/1108]
• Causes: Finisher control PC board LGC board
• Remedy: Finisher • Check if the harness connecting the equipment and the finisher controller PC board is disconnected or open circuited. • Check if the conductor pattern on the finisher controller PC board is open circuited or short circuited. • Update the finisher firmware. LGC board • Check if the harness connecting the finisher and the LGC board on the equipment is disconnected or open circuited. • Connector check (CN363) • Check if the conductor pattern on the LGC board is open circuited or short circuited.

• Code: CB01
• Description: Finisher communication error [MJ-1036] Finisher communication error: Communication error has occurred between the equipment and finisher. [MJ-1107/1108]
• Causes: Finisher control PC board LGC board
• Remedy: Finisher • Check if the harness connecting the equipment and the finisher controller PC board is disconnected or open circuited. • Check if the conductor pattern on the finisher controller PC board is open circuited or short circuited. • Update the finisher firmware. LGC board • Check if the harness connecting the finisher and the LGC board on the equipment is disconnected or open circuited. • Connector check (CN363) • Check if the conductor pattern on the LGC board is open circuited or short circuited.

• Code: CB10
• Description: Entrance motor abnormality: The entrance motor is not rotating normally. [MJ-1107/1108]
• Causes: MJ-1107 Entrance motor (M1) Finisher controller PC board
  MJ-1108 Entrance motor Finisher control PC board
• Remedy: MJ-1107 Entrance roller If there is mechanical problem when the entrance roller is rotated, fix the mechanism. Entrance motor (M1) Check the connectors and harnesses between the entrance motor (M1) and the finisher control PC board (CN7).
  MJ-1108 Feeding roller Rotate the feeding roller. Fix any mechanical problem. Entrance motor Check if the connector (CN26) on the finisher controller PC board is disconnected from the entrance motor (M1) and the harnesses are open circuited. Correct if so.

• Code: CB11
• Description: Buffer tray guide motor abnormality: The buffer tray guide motor is not rotating or the buffer tray guide is not moving normally. [MJ-1107/1108]
• Causes: MJ-1107 Buffer tray guide motor (M3) Finisher controller PC board
  MJ-1108 Buffer tray guide motor Finisher controller PC board
• Remedy: MJ-1107 Buffer tray guide If there is mechanical problem when the buffer tray guide is opened/closed while the buffer roller is lifted up, fix the mechanism. Buffer tray guide motor (M3) Check the connectors and harnesses between the buffer tray guide motor (M3) and the finisher control PC board (CN18).
  MJ-1108 Buffer tray guide Raise the buffer roller and open/close the buffer tray guide. Fix any mechanical problem. Buffer tray guide motor Check if the connector (CN11) on the finisher controller PC board is disconnected from the buffer tray guide motor (M2) and the harnesses are open circuited. Correct if so.

• Code: CB12
• Description: Buffer roller drive motor abnormality: The buffer roller drive motor is not rotating or the buffer roller is not moving normally. [MJ-1107/1108]
• Causes: MJ-1107 Buffer roller drive motor (M6) Finisher controller PC board
  MJ-1108 Buffer roller drive motor Finisher controller PC board
• Remedy: MJ-1107 Buffer roller If there is mechanical problem when the buffer roller is rotated, fix the mechanism. Buffer roller drive motor (M6) Check the connectors and harnesses between the buffer roller drive motor (M6) and the finisher control PC board (CN18).
  MJ-1108 Buffer roller Rotate the buffer roller. Fix any mechanical problem. Buffer roller drive motor Check if the connector (CN11) on the finisher controller PC board is disconnected from the buffer roller drive motor (M4) and the harnesses are open circuited. Correct if so.

• Code: CB13
• Description: Finisher exit motor abnormality [MJ-1108]
• Causes: MJ-1108 Exit motor Finisher control board
• Remedy: MJ-1108 Exit roller • Is there any mechanical problem when the exit roller is rotated? Exit motor (M11). • Motor check • Connector check • Harness check Finisher control board • Connector check (CN13) • Board check

• Code: CB14
• Description: Paper holding arm motor abnormality [MJ-1108]
• Causes: MJ-1108 Assist arm motor Finisher control board
• Remedy: MJ-1108 Paper pusher cam • Is there any mechanical problem when the paper pusher cam is rotated? Assist arm motor (M10) • Motor check • Connector check • Harness check Finisher control board • Connector check (CN13) • Board check