• Code: C5370
• Description: MFP control board cooling fan's failure to turn The fan lock signal remains HIGH for a predetermined continuous period of time while the fan is turning.
• Causes: • MFP control board cooling fan (FM17) • MFP board (MFPB)
• Remedy: 1 Check the connector between FM17-MFPB PJ26 for proper connection and correct as necessary. 2 Check the fan for possible overload and correct as necessary. 3 FM17 operation check MFPB PJ26-3 (LOCK) 21-O 4 Replace FM17 5 Replace MFPB

• Code: C5372
• Description: MFP control board CPU temperature failure Temperature failure of CPU on the MFP board was detected.
• Causes: • CPU cooling fan (FM104) • MFP board (MFPB)
• Remedy: 1 Reboot the machine. 2 Check the connector between FM104-MFPB PJ20 for proper connection and correct as necessary. 3 Check the fan for possible overload and correct as necessary. 4 FM104 operation check MFPB PJ20 17-S 5 Replace FM104 6 Replace MFPB

• Code: C5601
• Description: Engine control error The port monitor control detects engine control error.
• Causes: Printer control board (PRCB)
• Remedy: 1 Check the connectors of the printer control board (PRCB) for proper connection, and correct as necessary. 2 Rewrite the firmware. 3 Replace PRCB

• Code: C6001
• Description: DF related configuration error 1 Inconsistency in the configuration with the installed DF is detected on the main body.
• Causes: • DF control board (DFCB) • Dual scan image processing board (DSIPB) • MFP board (MFPB)
• 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 Correct the harness connection between DSIPB and MFPB if faulty. 4 Replace DFCB 5 Replace DSIPB 6 Replace MFPB

• Code: C6002
• Description: DF related configuration error 2 Inconsistency in the configuration with the installed DF is detected on the DF.
• Causes: • DF control board (DFCB) • Dual scan image processing board (DSIPB)
• 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 is unable to detect the scanner located at its home position. • The scanner home sensor 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 detects the scanner when the scanner has moved the maximum travelling distance from the position, at which it blocks the scanner home sensor.
• Causes: • Scanner home sensor (PS201) • Scanner motor (M201) • Scanner drive board (SCDB) • 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 PS201, M201, SCDB and MFPB connector for proper connection and correct as necessary. 5 PS201 I/O check, sensor check SCDB PJ6-3 (ON) 17-V 6 M201 operation check SCDB PJ4-1 to 6 17-V 7 Replace SCDB 8 Replace MFPB

• Code: C6103
• Description: Slider over running The scanner home sensor 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.
• Causes: • Scanner home sensor (PS201) • Scanner motor (M201) • Scanner drive board (SCDB) • 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 PS201, M201, SCDB and MFPB connector for proper connection and correct as necessary. 5 PS201 I/O check, sensor check SCDB PJ6-3 (ON) 17-V 6 M201 operation check SCDB PJ4-1 to 6 17-V 7 Replace SCDB 8 Replace MFPB

• Code: C6104
• Description: Back side cleaning home sensor abnormality (initial) • The back side cleaning home sensor (PS9) does not change from H to L even after the lapse of a given period of time after the home position detecting operation is started at the initial operation. • The back side cleaning home sensor (PS9) does not change from L to H even after the lapse of a given period of time after the home position detecting operation is started at the initial operation.
• 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