Konica-Minolta bizhub C300

Detection timing

Type	Description
Detection of misfeed at tray 3 feed or vertical transport section	The leading edge of the paper does not block the tray 3 vertical transport sensor (PC117-PC) even after the lapse of a given period of time after the tray3 take-up motor (M122-PC) has been energized.
	The tray 2 vertical transport sensor (PC8-PC) is not blocked even after the lapse of a given period of time after the paper has blocked the tray 3 vertical transport sensor (PC117-PC).
	The tray 3 vertical transport sensor (PC117-PC) is not unblocked even after the lapse of a given period of time after it has been blocked by the paper.
Tray 3 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 3 feed.
Detection of paper left in Tray 3	The tray 3 vertical transport sensor (PC117-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.
	The tray 3 take-up sensor (PC116-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 3 take-up sensor (PC116-PC)
Tray 3 vertical transport sensor (PC117-PC)
Tray 2 vertical transport sensor (PC8-PC)
Tray3 take-up motor (M122-PC)
Registration roller sensor (PC1)

Control board (PWB-C2 PC)
Mechanical control board (MFPB)

Action

Step	Action	Control signal	Location
1	Initial check items.
2	PC1 I/O check, sensor check	MFPB CNSEN-3 (ON)	C-3
3	PC116-PC I/O check, sensor check	PWB-C2 PC PJ6C2 PC-8 (ON)	PC-103, PC-203 B-2
4	PC117-PC I/O check, sensor check	PWB-C2 PC PJ6C2 PC-11 (ON)	PC-103, PC-203 B-2
5	PC8-PC I/O check, sensor check	PCCB PJ6PCCB-11 (ON)	S-25
6	M122-PC operation check	PWB-C2 PC PJ5C2 PC-1 to 4	PC-103, PC-203 B-3
7	Change PWB-C2 PC
8	Change MFPB