Konica-Minolta bizhub C450P

Detection timing

Type	Description
Misfeed detected at Duplex Transport Section	The Registration Roller Sensor (PC28) is not blocked even after the lapse of a given period of time after a Duplex paper take-up sequence has been started.
	The Duplex Unit Transport Sensor 2 (PC1-DU) is not blocked even after the lapse of a given period of time after the paper has blocked the Duplex Unit Transport Sensor 1 (PI1-DU).
	The Duplex Unit Transport Sensor 1 (PI1-DU) is not unblocked even after the lapse of a given period of time after it has been blocked by the paper.
	The Duplex Unit Transport Sensor 2 (PC1-DU) is not unblocked even after the lapse of a given period of time after it has been blocked by the paper.
Paper left at Duplex Transport Section	Duplex Unit Transport Sensor 1 (PI1-DU) or Duplex Unit Transport Sensor 2 (PC1-DU) is blocked when the Main Power Switch is turned ON, a door or cover is opened and closed, or a misfeed or malfunction is reset.

Relevant electrical parts

Registration Roller Sensor (PC28)
Duplex Unit Transport Sensor 1 (PI1-DU)
Duplex Unit Transport Sensor 2 (PC1-DU)
Switchback Motor (M1-DU)
Duplex Unit Transport Motor (M2-DU)

Duplex Control Board (PWB-A DU)
Control Board (PWB-MC)

Action

Step	Action	Control signal	Location
1	Initial check items.
2	PC28 I/O check, Sensor check	PWB-Z PJ6Z-11 (ON)	T to U-27
3	PI1-DU I/O check, Sensor check		Duplex Unit E-6
4	PC1-DU I/O check, Sensor check		Duplex Unit C-6
5	M1-DU operation check	PWB-A DU PJ3A-1 to 4	Duplex Unit C-5
6	M2-DU operation check	PWB-A DU PJ2A-1 to 4	Duplex Unit C-5
7	Change PWB-A DU
8	Change PWB-MC