• Code: C5606
• Description: Engine transmission timeout. A communication error is detected between CPUs.
• Causes: MFP board (MFPB)
• Remedy: 1. Turn OFF the main power switch, disconnect and then connect the power cord. Wait for 10 sec. or more after connect the power cord, and turn ON the main power switch. 2. Rewrite the firmware. 3. Replace MFPB.

• Code: C6102
• Description: Drive system home sensor malfunction. • The scanner home sensor (PS105) is unable to detect the scanner located at its home position. • The scanner home sensor (PS105) is unable to detect a scanner even when the scanner motor (M101) has been driven to move the scanner over the maximum travelling distance. • The scanner home sensor (PS105) detects the scanner when the scanner has moved the maximum travelling distance from the position, at which it blocks the scanner home sensor (PS105).
• Causes: • Scanner home sensor (PS105) • Scanner motor (M101) • MFP board (MFPB)
• 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 [Sub Scan Zoom Adj.]. 4. Check the connector between M101-relay CN6IR-MFPB CN26E for proper connection and correct as necessary. 5. Check the connector between PS105-MFPB CN27E for proper connection and correct as necessary. 6. PS105 I/O check, sensor check • Control signal: MFPB CN27E-15 (ON) • Location of electrical component: 5-V 7. M101 operation check • Control signal: MFPB CN26E-1 to 4 • Location of electrical component: 6-W 8. Replace MFPB.

• Code: C6103
• Description: Slider over running. The scanner home sensor (PS105) detects the scanner at its home position during a period of time that begins with the time when a prescan command and a scan preparation command are executed and ends when a home return command is executed.
• Causes: • Scanner home sensor (PS105) • Scanner motor (M101) • MFP board (MFPB)
• 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 [Sub Scan Zoom Adj.]. 4. Check the connector between M101-relay CN6IR-MFPB CN26E for proper connection and correct as necessary. 5. Check the connector between PS105-MFPB CN27E for proper connection and correct as necessary. 6. PS105 I/O check, sensor check • Control signal: MFPB CN27E-15 (ON) • Location of electrical component: 5-V 7. M101 operation check • Control signal: MFPB CN26E-1 to 4 • Location of electrical component: 6-W 8. Replace MFPB.

• Code: C6704
• Description: Image input time out. Image data is not input from the scanner to the MFP board (MFPB).
• Causes: • CCD unit • CCD board (CCDB) • MFP board (MFPB)
• Remedy: 1. Select [Service Mode] -> [State Confirmation] -> [Memory/Storage Adjustment] -> [Memory Bus Check] -> [Scanner -> Memory], and conduct the memory bus function. 2. Check the connector between CCDB PJ1-MFPB CN7 for proper connection and correct as necessary. 3. Replace MFPB. 4. Replace the CCD unit.

• Code: C6751
• Description: CCD 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 • CCD unit • CCD board (CCDB) • MFP board (MFPB)
• Remedy: 1. Check the connector between CCDB PJ1-MFPB CN7 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. 5. Replace the CCD unit. 6. MFPB F8E conduction check 7. 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 (CCDB) was conducted, and verification failure was detected.
• Causes: • CCD unit • CCD board (CCDB) • MFP board (MFPB)
• Remedy: 1. Correct the harness connection of CCDB if faulty. 2. Replace the CCD unit. 3. MFPB F8E conduction check 4. 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 or power key is turned ON or the machine recovers from the sleep mode.
• Causes: • CCD unit • CCD board (CCDB) • DC power supply (DCPU)
• Remedy: 1. Correct the harness connection between CCDB and DCPU if faulty. 2. Replace the CCD unit. 3. Replace DCPU.

• Code: C6F01
• Description: Scanner sequence trouble 1. The original transport interval becomes shorter than the predetermined value due to an original transport control error in original reading in DF.
• Causes: • MFP board (MFPB) • DF control board (DFCB)
• Remedy: 1. Correct the harness connection between MFPB CN31E-DFCB J21 if faulty. 2. Replace DFCB. 3. Replace MFPB.