Konica-Minolta bizhub C31P

Detection timing

Type	Description
Detection of misfeed at transfer section	• The registration sensor (PS4) is not blocked even after the lapse of a given period of time after the media has unblocked PS4.
	• The media does not block the exit sensor (PS8) even after the lapse of a given period of time after the media has unblocked the registration sensor (PS4).
	• When a sheet of media is passing through the registration sensor (PS4), the pressure sequence of the 2nd transfer section has not started.
Detection of media left in transfer section	• The registration sensor (PS4) is unblocked when the power switch is turned ON, a door or cover is opened and closed, or a misfeed or malfunction is reset.
	• The media loop sensor (PS6) is unblocked when the power switch is turned ON, a door or cover is opened and closed, or a misfeed or malfunction is reset.

Relevant electrical parts

Registration sensor (PS4)
Exit sensor (PS8)
Media loop sensor (PS6)
Pressure/retraction clutch/2 (CL5)

Print control board (PRCB)

Action

Step	Action	Control signal	Location
1	Initial check items.
2	PS4 sensor check	PRCB PJ15-3 (ON)	C-3
3	PS8 sensor check	PRCB PJ4-6 (ON)	I-2
4	PS6 sensor check	PRCB PJ16-3 (ON)	C-3 to 4
5	CL5 operation check	PRCB PJ10-8 (ON)	I-7
6	Change PRCB.