Konica-Minolta bizhub C250

Detection timing

Type	Description
Detection of misfeed at Tray 2 feed section	The leading edge of the paper does not block the Tray 2 Vertical Transport Sensor (PC8-PC) even after the lapse of a given period of time after the Tray 2 Paper Feed Motor (M1-PC) has been energized.
Detection of misfeed at Tray 2 vertical transport section	The Registration Roller Sensor (PC1) is not blocked even after the lapse of a given period of time after the paper has blocked the Tray 2 Vertical Transport Sensor (PC8-PC).
	Tray 2 Vertical Transport Sensor (PC8-PC) does not transmit the paper even after the lapse of a given period of time after the paper has blocked PC8-PC.
Tray 2 Vertical Transport section Loop Registration Reversing JAM	Rise timing of load for registration is earlier than the one for making the loop at front of the Registration Roller at Tray 2 feed.
Detection of paper left in Tray 2	Tray 2 Vertical Transport Sensor (PC8-PC) 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.
	Tray 2 Paper Take-Up Sensor (PC9-PC) 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

Tray 2 Paper Take-Up Sensor (PC9-PC)
Tray 2 Vertical Transport Sensor (PC8-PC)
Registration Roller Sensor (PC1)
Tray 2 Paper Feed Motor (M1-PC)

Tray 2 Control Board (PWB-Z-PC)
Mechanical Control Board (PWB-M)

Action

Step	Action	Control signal	Location
1	Initial check items.
2	PC9-PC I/O check, Sensor check	PWB-Z-PC PJ6Z PC-8 (ON)	S-25
3	PC8-PC I/O check, Sensor check	PWB-Z-PC PJ6Z PC-11 (ON)	S-25
4	PC1 I/O check, Sensor check	PWB-M CNSEN-3 (ON)	C-3
5	M1-PC operation check	PWB-Z-PC PJ5Z PC-1 to 4	M-24
6	Change PWB-Z-PC
7	Change PWB-M