• 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.
• Causes: • LED exposure unit (LA201) • CCD board (CCDB) • MFP board (MFPB)
• Remedy: 1 Correct the harness connection between CCDB and MFPB if faulty. 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 mirror. 5 Replace CCDB. 6 Replace MFPB.

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

• Code: C6753
• Description: ASIC clock input error (back side)
  When starting the machine, verification on reading and writing the predetermined value for image processing ASIC on dual scan image processing board was conducted, and verification failure was detected.
• Causes: • Dual scan image processing board (DSIPB) • CIS module (CIS) • MFP board (MFPB)
• Remedy: 1 Correct the harness connection between DF and DSIPB if faulty. 2 Correct the harness connection between DSIPB and MFPB if faulty. 3 Replace the CIS module. 4 Replace DSIPB. 5 Replace MFPB.
  

• Code: C6754
• Description: CIS clamp adjustment failure
  After the gain adjustment is performed at the start-up, the CIS clamp adjustment value is too high or too low.
• Causes: • CIS module (CIS) • Dual scan image processing board (DSIPB) • DF power supply (DFPU) • MFP board (MFPB)
• Remedy: 1 Correct the harness connection between CIS and DSIPB if faulty. 2 Correct the harness connection between CIS and DFPU if faulty. 3 Check for possible extraneous light and correct as necessary. 4 Clean the back side reading glass and the shading sheet if dirty. 5 Replace CIS. 6 Replace DSIPB. 7 Replace DFPU. 8 Replace MFPB.

• Code: C6755
• Description: CIS gain adjustment failure
  After the gain adjustment is performed at the start-up, the peak value of the output data is lower than a given value.
• Causes: • CIS module (CIS) • Dual scan image processing board (DSIPB) • DF power supply (DFPU) • MFP board (MFPB)
• Remedy: 1 Correct the harness connection between CIS and DSIPB if faulty. 2 Correct the harness connection between CIS and DFPU if faulty. 3 Check for possible extraneous light and correct as necessary. 4 Clean the back side reading glass and the shading sheet if dirty. 5 Replace CIS. 6 Replace DSIPB. 7 Replace DFPU. 8 Replace MFPB.

• Code: C6901
• Description: DSC board mount failure 1
  When MFP detects that DSC board (front side) is not properly installed.
• Causes: • DSC board/1 (DSCB/1; SC-508) • MFP board (MFPB)
• Remedy: 1 Correct the harness connection of DSC board if faulty. 2 Replace the DSC board. 3 Replace MFPB.

• Code: C6902
• Description: DSC Bus check NG1-1
  When DSC bus check (front side) detects an error.
• Causes: • DSC board/1 (DSCB/1; SC-508) • MFP board (MFPB)
• Remedy: 1 Correct the harness connection of DSC board if faulty. 2 Replace the DSC board. 3 Replace MFPB.

• Code: C6903
• Description: DSC Bus check NG1-2
  When DSC bus check (front side) detects an error.
• Causes: • DSC board/1 (DSCB/1; SC-508) • MFP board (MFPB)
• Remedy: 1 Correct the harness connection of DSC board if faulty. 2 Replace the DSC board. 3 Replace MFPB.