• Code: SC29-04
• Description: The dirt correction of the sensor is not completed. While in gamma correction, the dirt correction of the PGC sensor (PGCS) is not sufficient. When SC29-4 or SC29-7 is detected ten times in succession, this error code is displayed.
• Causes: Toner control sensor board (TCSB) Printer control board (PRCB) Developing motor (M3) Write unit Overall control board (OACB)

• Code: SC29-05#
• Description: The PGC sensor (PGCS) output abnormality. While in the gamma correction, a patch for control is not output. (No output is made from the PGCS.)
• Causes: Toner control sensor board (TCSB) Printer control board (PRCB) Developing motor (M3) Write unit Overall control board (OACB)

• Code: SC29-06#
• Description: The gamma correction data is defective. The gamma correction output is abnormal. A regression error when carrying out a gamma curve operation while in the gamma correction.
• Causes: Toner control sensor board (TCSB) Printer control board (PRCB) Developing motor (M3) Write unit Overall control board (OACB)

• Code: SC29-07
• Description: The dirt correction of the sensor is not completed. While in the dot diameter correction, the dirt correction of the PGC sensor (PGCS) is not sufficient. When SC29-4 or SC29-7 is detected ten times in succession, this error code is displayed.
• Causes: Toner control sensor board (TCSB) Printer control board (PRCB) Developing motor (M3) Write unit Overall control board (OACB)

• Code: SC29-08#
• Description: Correction abnormality. While in the dot diameter correction, the correction is terminated with an abnormal value.
• Causes: Toner control sensor board (TCSB) Printer control board (PRCB) Developing motor (M3) Write unit Overall control board (OACB)

• Code: SC29-09
• Description: Drum potential sensor (DPS) output abnormality. While in the 0V check of the DPS, more than 100V of the drum surface potential is detected more than 5 times. When this condition is detected 5 times in succession, the error code is displayed.
• Causes: Drum potential sensor board (DPSB) Printer control board (PRCB) Drum potential sensor (DPS) Loose connection

• Code: SC29-10
• Description: Drum potential sensor (DPS) output abnormality. While in the drum potential correction, a patch for control is not output with the V1 getting to more than 350V. When this condition is detected 5 times in succession, the error code is displayed.
• Causes: Drum potential sensor board (DPSB) Printer control board (PRCB) Drum potential sensor (DPS) Loose connection

• Code: SC29-11
• Description: The data is defective. While in the drum potential correction, no convergence is obtained even after correction is made more than 10 times. When this condition is detected 5 times in succession, the error code is displayed.
• Causes: Drum potential sensor board (DPSB) Printer control board (PRCB) Drum potential sensor (DPS) Loose connection