• Code: SC21-02
• Description: The blowout of a fuse for the charger cleaning motor (M23) in the printer control board (PRCB) is checked. • When the charger cleaning home sensor (PS26) is OFF with the main power switch (SW1) ON, the PS26 does not turn ON within 35 seconds after the M23 turns ON for home position research operation (return operation). And at this time, an error detection signal (blowout of a fuse) is detected. • The PS26 does not turn OFF within 15 seconds after the reverse operation (return operation) is started. And at this time, an error detection signal (blowout of a fuse) is detected. • The charger cleaning limit sensor (PS27) does not turn ON within a specified period of time after the reverse operation (return operation) is started for detection of PS26 being OFF. Or, the PS26 does not turn ON within a specified period of time after the PS27 turns ON. At this time, an error detection signal (blowout of a fuse) is detected.
• Causes: Charger cleaning motor (M23) Printer control board (PRCB)
• Remedy: The main body stops immediately to turn OFF the RL1 (main).

• Code: SC21-03
• Description: The locking of the charger cleaning motor (M23) is detected. A motor lock signal is detected while moving from the charger cleaning limit sensor (PS27) side to the charger cleaning home sensor (PS26) side, and after a retry operation, a fifth motor lock signal is detected.
• Causes: Charger cleaning motor (M23) Charger/cleaning member
• Remedy: The main body stops immediately to turn OFF the RL1 (main).

• Code: SC21-04
• Description: It is checked that the operations of the transfer/separation cleaning motor (M20) are over. • When the transfer/separation cleaning home sensor (PS38) is OFF with the main power switch (SW1) ON, the PS38 does not turn ON within a specified period of time after the transfer/ separation cleaning motor (M20) turns ON for a home position research operation (return operation). At this time, an error detection signal (blowout of a fuse) is not detected. • The PS38 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 a fuse) is not detected. • The transfer/separation cleaning limit sensor (PS39) does not turn ON within a specified period of time after the reverse operation (return operation) is started for detection of PS38 being OFF. Or, the PS38 does not turn ON within a specified period of time after the PS39 turns ON. At this time, an error detection signal (blowout of a fuse) is not detected.
• Causes: Transfer/separation cleaning motor (M20) Transfer/separation cleaning home sensor (PS38) Transfer/separation cleaning limit sensor (PS39) ADU drive boards /1, /2 (ADUDB/1, /2)
• Remedy: The main body stops immediately to turn OFF the RL1 (main).

• Code: SC21-05
• Description: The blowout of a fuse for the transfer/separation cleaning motor (M20) in the ADU drive boards /1 and /2 (ADUDB/1 and /2)is checked. • When the transfer/separation cleaning home sensor (PS38) is OFF with the main power switch (SW1) ON, the PS38 does not turn ON within a specified period of time after the transfer/ separation cleaning motor (M20) turns ON for a home position research operation (return operation). At this time, an error detection signal (blowout of a fuse) is detected. • The PS38 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 a fuse) is detected. • The PS39 does not turn ON within a specified period of time after the reverse operation (return operation) is started for detection of PS38 being OFF. Or, the PS38 does not turn ON within a specified period of time after the PS39 turns ON. At this time, an error detection signal (blowout of a fuse) is detected.
• Causes: Transfer/separation cleaning motor (M20) ADU drive boards /1, /2 (ADUDB/1, /2)
• Remedy: The main body stops immediately to turn OFF the RL1 (main).

• Code: SC21-06
• Description: The locking of the transfer/separation cleaning motor (M20) is detected. Motor lock signals are detected while moving from the transfer/ separation limit sensor (PS39) side to the transfer/separation home sensor (PS38) side, and after a retry operation, a fifth motor lock signal is detected.
• Causes: Transfer/separation cleaning motor (M20) Transfer/separation charger/ Transfer/separation cleaning member
• Remedy: The main body stops immediately to turn OFF the RL1 (main).

• Code: SC21-07
• Description: The home position search time of the transfer assist motor is out. The transfer assist home sensor (PS39) does not turn ON within a specified period of time after the home position search operation of the transfer assist motor (M19) is started.
• Causes: Transfer assist motor (M19) Transfer assist home sensor (PS39) ADU drive boards /1, /2 (ADUDB/1, /2)
• Remedy: The main body stops immediately to turn OFF the RL1 (main).

• Code: SC21-08
• Description: An error is detected while in the operation of the transfer assist motor. An error is detected of the transfer assist motor (M19) while in the print operation.
• Causes: Transfer assist motor (M19) Transfer/separation cleaning limit sensor (PS39) Transfer assist home sensor (PS39)
• Remedy: The main body stops immediately to turn OFF the RL1 (main).

• Code: SC23-01
• Description: The speed error signal of the toner bottle motor (M6) is checked. An error detection signal is detected twice in succession a specified period of time after the M6 turns ON (the first signal is ignored).
• Causes: Toner bottle motor (M6) Printer control board (PRCB) Toner bottle/large capacity hopper
• Remedy: The main body stops immediately to turn OFF the RL1 (main).