• Code: C6105
• Description: Back side cleaning home sensor abnormality (normal) At the time of operation other than the initial operation, the back side cleaning home sensor (PS9) error is detected.
• Causes: • Back side cleaning home sensor (PS9) • Back side cleaning motor (M7) • DF control board (DFCB)
• Remedy: 1 Check the connector between M7-relay CN119-DFCB CN6 for proper connection, and correct as necessary. 2 Check the connector of M7 for proper drive coupling, and correct as necessary. 3 PS9 I/O check, sensor check DFCB CN3-11 (ON) DF-702 6-C 4 M7 operation check DFCB CN6-5 to 8 DF-702 7-C 5 Replace M7 6 DFCB ICP4 conduction check 7 Replace DFCB

• Code: C6704
• Description: Image input time out Image data is not input from the scanner to the MFP board (MFPB).
• Causes: • MFP board (MFPB) • CCD board (CCDB)
• 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 Replace MFPB 4 Replace the CCD unit

• 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 the CCD unit 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 the CCD unit 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 CIS 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: C6756
• Description: CCD power-supply voltage malfunction Power is not supplied to CCD after the lapse of a given period of time after the main power switch is turned ON or the machine recovers from the sleep mode.
• Causes: • CCD board (CCDB) • Scanner drive board (SCDB) • DC power supply (DCPU)
• Remedy: 1 Correct the harness connection between CCDB and SCDB if faulty. 2 Correct the harness connection between SCDB and DCPU if faulty. 3 Replace the CCD unit 4 Replace SCDB 5 Replace DCPU