• Code: SC21-04
• Description: • It is checked that the operations of the transfer/separation cleaning motor (M18) are over. When the transfer/separation cleaning home sensor (PS11) is OFF with the main power switch (SW1) ON, PS11 does not turn ON within a specified period of time after the M18 turns ON for a home position research operation (return operation). At this time, an error detection signal (blowout of ICP) is not detected. • PS11 does not turn OFF within a specified period of time after the reverse operation (return operation) is started. At this time, an error detection signal (blowout of ICP) is not detected. • It is checked that the operations of the M18 are over. The transfer/separation cleaning limit sensor (PS12) does not turn ON within a specified period of time after the reverse operation (return operation) is started for detection of PS11 being OFF. Or, PS11 does not turn ON within a specified period of time after PS12 turns ON. At this time, an error detection signal (blowout of ICP) is not detected.
• Causes: Transfer/separation cleaning motor (M18) ADU drive board (ADUDB) Transfer/separation cleaning home sensor (PS11) Transfer/separation cleaning limit sensor (PS12) Wiring harness broken Loose connection

• Code: SC21-06
• Description: The locking of the transfer/separation cleaning motor (M18) is detected. Motor lock signals are detected while moving from the transfer/ separation limit sensor (PS12) side to the transfer/separation home sensor (PS11) side, and after a retry operation, a fifth motor lock signal is detected.
• Causes: Transfer/separation cleaning motor (M18) ADU drive board (ADUDB) Transfer/separation cleaning home sensor (PS11) Transfer/separation cleaning limit sensor (PS12) Transfer/separation cleaning member

• Code: SC23-01
• Description: The speed error signal of the toner bottle motor (M15) is checked. An error detection signal is detected twice in succession a specified period of time after M15 turns ON (the first signal is ignored).
• Causes: Toner bottle motor (M15) Printer control board (PRCB)

• Code: SC23-02
• Description: The speed error signal of the developing motor (M3) is checked. Since an error detection signal is detected a second after M3 turns ON, turn OFF M3 for a specified period of time. Then, an error detection signal is detected again a specified period of time after it is turned ON again.
• Causes: Developing motor (M3) Printer control board (PRCB)

• Code: SC23-03
• Description: The locking of the blade motor (M14) is detected. The error detection signal (over current) of M14 is detected.
• Causes: Drum motor (M2) Blade motor (M14) Printer control board (PRCB) Blade sensor /1 (PS30) Blade sensor /2 (PS31) DC power supply /2 (DCPS2) Wiring harness broken Loose connection

• Code: SC23-04
• Description: It is checked that the movement of the blade motor (M14) is not completed, and the 24V power source is also checked. The drum READY1 signal (READY condition) cannot be detected within a specified period of time after the drum motor (M2) turns ON. Or, the drum READY1 signal (READY release condition) cannot be detected within a specified period of time after M2 turns OFF. At this time, an error detection signal (24V cut out) is detected.
• Causes: Drum motor (M2) Blade motor (M14) Printer control board (PRCB) Blade sensor /1 (PS30) Blade sensor /2 (PS31) DC power supply /2 (DCPS2) Wiring harness broken Loose connection

• Code: SC23-05
• Description: The blowout of ICP for the blade motor (M14) in the printer control board (PRCB) is checked. The drum READY1 signal (READY condition) cannot be detected within a specified period of time after the drum motor (M2) turns ON. Or, the drum READY1 signal (READY release condition) cannot be detected within a specified period of time after M2 turns OFF. At this time, the error detection signal (blowout of ICP) of M14 is detected.
• Causes: Drum motor (M2) Blade motor (M14) Printer control board (PRCB) Blade sensor /1 (PS30) Blade sensor /2 (PS31) DC power supply /2 (DCPS2) Wiring harness broken Loose connection

• Code: SC23-06
• Description: It is checked that the movement of the blade motor (M14) is not completed. The drum READY1 signal (READY condition) cannot be detected within a specified period of time after the drum motor (M2) turns ON. Or, the drum READY1 signal (READY release condition) cannot be detected within a specified period of time after M2 turns OFF. At this time, an error detection signal is not detected.
• Causes: Drum motor (M2) Blade motor (M14) Printer control board (PRCB) Blade sensor /1 (PS30) Blade sensor /2 (PS31) DC power supply /2 (DCPS2) Wiring harness broken Loose connection