• Code: 7414
• Description: Drum unit Y type mismatch error (Yellow) Improper adaptation of the main unit and drum unit is detected.
• Remedy: Drum unit Y Check if the drum unit of different models is attached, and replace it to the correct one.

• Code: 7601
• Description: ID sensor L error (Left side) When the measured value of the ID sensor matches any of the following. If the light potential P-wave is lower than the dark potential P-wave (+0.5V). If light potential S-wave is lower than the dark potential S-wave. The dark potential P/S-wave is greater than 0.8V, or less than 0.15V.
• Remedy: ID sensor L (Left side) 1. Clean the ID sensor surface. 2. Check how the ID sensor is attached. 3. Check if the error is detected after performing the calibration. 4. Confirm that the wiring connector is firmly connected, and if necessary, connect the connector all the way in. ID sensor and Main/Engine PWB (YC13) 5. If the wiring is disconnected, short-circuited or has ground fault, replace the wire. 6. Replace the ID sensor.
  Main/Engine PWB 1. Check the engine firmware and upgrade to the latest version if necessary. Replace the Main/Engine PWB.

• Code: 7602
• Description: ID sensor R error (Right side) When the measured value of the ID sensor matches any of the following. If the light potential P-wave is lower than the dark potential P-wave (+0.5V). If light potential S-wave is lower than the dark potential S-wave. The dark potential P/S-wave is greater than 0.8V, or less than 0.15V.
• Remedy: ID sensor R (Right side) 1. Clean the ID sensor surface. 2. Check how the ID sensor is attached. 3. Check if the error is detected after performing the calibration. 4. Confirm that the wiring connector is firmly connected, and if necessary, connect the connector all the way in. ID sensor and Main/Engine PWB (YC14) 5. If the wiring is disconnected, short-circuited or has ground fault, replace the wire. 6. Replace the ID sensor.
  Main/Engine PWB 1. Check the engine firmware and upgrade to the latest version if necessary. 2. Replace the Main/Engine PWB.

• Code: 7611
• Description: ID sensor density error (K) During the calibration, ID sensor cannot read a patch density on the primary transfer belt normally. (Black)
• Remedy: Primary transfer unit ID sensor Drum unit Developer unit LSU Main/Engine PWB 1. After turning OFF the power switch, disconnect the power plug and connect it again, then turning ON the power switch. 2. By adjustment / maintenance of the system menu, execute the color calibration. 3. Check the occurrence of this C call in the Event Log. 4. When the same C call is detected again, Clean if there are any dirt or stains on the primary transfer belt or the ID sensor surface. 5. Check whether the shutter of ID sensor is opened during closing the paper tray. 6. There is no improvement, replace the primary transfer unit. 7. After performing the test print, if the poor density occurs, check whether any failure in the drum unit, developer unit, LSU. 8. There is no improvement, replace the main / engine PWB.

• Code: 7612
• Description: ID sensor density error (C) During the calibration, ID sensor cannot read a patch density on the primary transfer belt normally. (Cyan)
• Remedy: Primary transfer unit ID sensor Drum unit Developer unit LSU Main/Engine PWB 1. After turning OFF the power switch, disconnect the power plug and connect it again, then turning ON the power switch. 2. By adjustment / maintenance of the system menu, execute the color calibration. 3. Check the occurrence of this C call in the Event Log. 4. When the same C call is detected again, Clean if there are any dirt or stains on the primary transfer belt or the ID sensor surface. 5. Check whether the shutter of ID sensor is opened during closing the paper tray. 6. There is no improvement, replace the primary transfer unit. 7. After performing the test print, if the poor density occurs, check whether any failure in the drum unit, developer unit, LSU. 8. There is no improvement, replace the main / engine PWB.

• Code: 7613
• Description: ID sensor density error (M) During the calibration, ID sensor cannot read a patch density on the primary transfer belt normally. (Magenta)
• Remedy: Primary transfer unit ID sensor Drum unit Developer unit LSU Main/Engine PWB 1. After turning OFF the power switch, disconnect the power plug and connect it again, then turning ON the power switch. 2. By adjustment / maintenance of the system menu, execute the color calibration. 3. Check the occurrence of this C call in the Event Log. 4. When the same C call is detected again, Clean if there are any dirt or stains on the primary transfer belt or the ID sensor surface. 5. Check whether the shutter of ID sensor is opened during closing the paper tray. 6. There is no improvement, replace the primary transfer unit. 7. After performing the test print, if the poor density occurs, check whether any failure in the drum unit, developer unit, LSU. 8. There is no improvement, replace the main / engine PWB.

• Code: 7614
• Description: ID sensor density error (Y) During the calibration, ID sensor cannot read a patch density on the primary transfer belt normally. (Yellow)
• Remedy: Primary transfer unit ID sensor Drum unit Developer unit LSU Main/Engine PWB 1. After turning OFF the power switch, disconnect the power plug and connect it again, then turning ON the power switch. 2. By adjustment / maintenance of the system menu, execute the color calibration. 3. Check the occurrence of this C call in the Event Log. 4. When the same C call is detected again, Clean if there are any dirt or stains on the primary transfer belt or the ID sensor surface. 5. Check whether the shutter of ID sensor is opened during closing the paper tray. 6. There is no improvement, replace the primary transfer unit. 7. After performing the test print, if the poor density occurs, check whether any failure in the drum unit, developer unit, LSU. 8. There is no improvement, replace the main / engine PWB.

• Code: 7620
• Description: ID sensor timing error The ID sensor does not properly read the patch printing position on the primary transfer belt or there is poor density. *: Automatic color registration correction does not succeed
• Remedy: Primary transfer unit ID sensor Drum unit Developer unit LSU Main/Engine PWB 1. After turning OFF the power switch, disconnect the power plug and connect it again, then turning ON the power switch. 2. By adjustment / maintenance of the system menu, execute the color calibration. 3. Check the occurrence of this C call in the Event Log. 4. When the same C call is detected again, Clean if there are any dirt or stains on the primary transfer belt or the ID sensor surface. 5. Check whether the shutter of ID sensor is opened during closing the paper tray. 6. There is no improvement, replace the primary transfer unit. 7. After performing the test print, if the poor density occurs, check whether any failure in the drum unit, developer unit, LSU. 8. When checking the printing position of the color, if there is any color shift occurs, re-install the LSU and the drum unit. 9. There is no improvement, replace the main / engine PWB.