• Code: C5370
• Description: Rear side cooling fan’s failure to turn
  The fan lock signal remains HIGH for a predetermined continuous period of time while the fan remains stationary.
• Remedy: 1 Check the connector between FM3-MFPB PJ26 for proper connection and correct as necessary. 2 Check the fan for possible overload and correct as necessary. 3 FM3 operation check MFPB PJ26-3 (LOCK) 7-P. 4 Replace FM3. 5 Replace MFPB.

• Code: C5372
• Description: MFP control board CPU temperature failure
  Temperature failure of CPU on the MFP board was detected.
• Remedy: 1 Reboot the machine. 2 Check the fan connector for proper connection and correct as necessary. 3 Check the fan for possible overload and correct as necessary. 4 Fan motor operation check. 5 Replace MFPB.

• Code: C5501
• Description: AC signal abnormality
  The zero cross signal is not input during fusing phase control.
• Remedy: 1 Check the fusing unit for correct installation (whether it is secured in position). 2 Check the fusing unit, DCPU and PRCB for proper connection and correct or change as necessary. 3 Replace fusing unit. 4 Replace PRCB. 5 Replace DCPU.

• Code: C5601
• Description: Engine control malfunction
  Engine control malfunction is detected with port monitor control.
• Remedy: 1 Check the connectors on the PRCB for proper connection and correct or change as necessary. 2 Rewrite the firmware. 3 Replace PRCB.

• Code: C5603
• Description: Expansion control board communication error
  Communication error is detected in expansion control board.
• Remedy: 1 Reboot the machine. 2 Check the connector between EXCB-PRCB for proper connection and correct as necessary. 3 PRCB ICP12 conduction check. 4 Replace EXCB. 5 Replace PRCB.

• Code: C6001
• Description: DF related configuration error 1
  Inconsistency in the configuration with the installed DF is detected on the main body.
• Remedy: 1 Check the type of the installed DF and replace it if it is a wrong one. 2 Check to see if the correct firmware is installed and rewrite with the correct one as necessary. 3 Correct the harness connection between DFCB and DSIPB if faulty. 4 Correct the harness connection between DSIPB and MFPB if faulty. 5 Replace DFCB. 6 Replace DSIPB. 7 Replace MFPB.

• Code: C6002
• Description: DF related configuration error 2
  Inconsistency in the configuration with the installed DF is detected on the DF
• Remedy: 1 Check the type of the installed DF and replace it if it is a wrong one. 2 Correct the harness connection between DFCB and DSIPB if faulty. 3 Check the connectors of the dual scan image processing board (DSIPB) for proper connection, and correct as necessary. (Direction of the point of contact and connection state of the flat cable in particular)

• Code: C6102
• Description: Drive system home sensor malfunction
  • The scanner home sensor (PS201) is unable to detect the scanner located at its home position. • The scanner home sensor (PS201) is unable to detect a scanner even when the scanner motor has been driven to move the scanner over the maximum travelling distance. • The scanner home sensor (PS201) detects the scanner when the scanner has moved the maximum travelling distance from the position, at which it blocks the scanner home sensor (PS201).
• Remedy: 1 Correct or change the scanner drive (pulley, gear, belt) if it is faulty. 2 Correct the scanner motor set screw if loose. - - 3 Adjust [Image Position Leading Edge] and [Feed Direction Adjustment]. 4 Check the connector between M201-SCDB PJ4 for proper connection and correct as necessary. 5 Check the connector between PS201-SCDB PJ6 for proper connection and correct as necessary. 6 Check the connector between SCDB PJ2-PRCB CN43 for proper connection and correct as necessary. 7 PS201 I/O check, sensor check SCDB PJ6-3 (ON) 27-P. 8 M201 operation check SCDB PJ4-1 to 4 27-P. 9 Replace SCDB. 10 Replace PRCB.