• Code: C5501
• Description: AC signal abnormality
  • Zero cross signal is not detected for a given period of interval when AC frequency is measured with the power switch ON or when fusing heater is turned ON/OFF.
• Remedy: 1 Check the fusing unit for correct installation (whether it is secured in position). 2 Check the fusing unit CN30-PRCB CN16, fusing unit-relay CN4AC-DCPU CN2 for proper connection and correct or change as necessary. 3 Change fusing unit. 4 Change PRCB. 5 Change 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 Change PRCB.

• Code: C5602
• Description: FPGA configuration error
  • When a configuration check is performed on the extended IC chip (FPGA) located on the printer control board (PRCB), error is detected.
• Remedy: 1 Reboot the machine. 2 Rewrite the firmware. 3 Change PRCB.

• 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.
• Remedy: 1 Correct or change the scanner drive (cable, 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- REYB/SCAN PJ5 for proper connection and correct as necessary. 5 Check the connector between PS201- REYB/SCAN PJ8 for proper connection and correct as necessary. 6 Check the connector between REYB/ SCAN PJ2-MFPB PJ14 for proper connection and correct as necessary. 7 PS201 I/O check, sensor check. 8 M201 operation check. 9 Change REYB/SCAN. 10 Change MFPB.

• Code: C6103
• Description: Slider over running
  • The scanner home sensor (PS201) detects the scanner at its home position during a period of time that begins with the time when a pre-scan command and a scan preparation command are executed and ends when a home return command is executed.
• Remedy: 1 Correct or change the scanner drive (cable, 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- REYB/SCAN PJ5 for proper connection and correct as necessary. 5 Check the connector between PS201- REYB/SCAN PJ8 for proper connection and correct as necessary. 6 Check the connector between REYB/ SCAN PJ2-MFPB PJ14 for proper connection and correct as necessary. 7 PS201 I/O check, sensor check. 8 M201 operation check. 9 Change REYB/SCAN. 10 Change MFPB.

• Code: C6704
• Description: Image input time out
  • Image data is not input from the scanner to the MFP board (MFPB).
• Remedy: 1 Select [Service Mode] ?? [State Confirmation] ?? [Memory/HDD Adj.] - [Memory Bus Check] - [Scanner - Memory], and conduct the memory bus function. 2 Check the connectors between scanner section and MFPB for proper connection and correct as necessary. 3 Change MFPB. 4 Change CCDB.

• Code: C6751
• Description: CCD clamp/gain adjustment failure
  • The adjustment value is 0 or 255 during a CCD clamp adjustment. • The peak value of the output data is 64 or less during a CCD gain adjustment.
• Remedy: 1 Check the connector between CCDB PJ2- MFPB PJ01 for proper connection and correct as necessary. 2 Check for possible extraneous light and correct as necessary. 3 Clean the lens, mirrors, CCD surface, and shading sheet if dirty. 4 Correct reflective mirror of the scanner if faulty, or change scanner. 5 Change CCDB. 6 Change MFPB.

• Code: C6752
• Description: ASIC clock input error
  • When starting the scanner, verification on reading and writing the predetermined value for image processing ASIC on CCD board (CCDB) was conducted, and verification failure was detected.
• Remedy: 1 Correct the harness connection of CCDB if faulty. 2 Change CCDB. 3 Change PRCB. 4 Change MFPB.