Konica-Minolta bizhub C252

Detection timing

Type	Description
Detection of misfeed at LCT feed section	The leading edge of the paper does not block the Paper Take-up Sensor (PC1- LCT) or Vertical Transport Sensor (PC2-LCT) even after the lapse of a given period of time after the Take-up Motor (M1-LCT) has been energized.
Detection of misfeed at LCT vertical transport section	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 Vertical Transport Sensor (PC2-LCT).
	The Vertical Transport Sensor (PC2-LCT) is not unblocked even after the lapse of a given period of time after it has been blocked by the paper.
LCT 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 LCT feed.
Detection of paper left in LCT	The Vertical Transport Sensor (PC2-LCT) 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

Paper Take-up Sensor (PC1-LCT)
Vertical Transport Sensor (PC2-LCT)
Tray 2 Vertical Transport Sensor (PC8-PC)
Take-up Motor (M1-LCT)
Registration Roller Sensor (PC1)

Control Board (PWB-C1 LCT)
Mechanical Control Board (PWB-M)

Action

Step	Action	Control signal	Location
1	Initial check items.
2	PC1 I/O check, Sensor check	PWB-M CNSEN-3 (ON)	C-3
3	PC1-LCT I/O check, Sensor check	PWB-C1 LCT PJ5C1 LCT-2 (ON)	PC-403 C-7
4	PC2-LCT I/O check, Sensor check	PWB-C1 LCT PJ5C1 LCT-5 (ON)	PC-403 C-7
5	PC8-PC I/O check, Sensor check	PWB-Z-PC PJ6Z PC-11 (ON)	S-25
6	M1-LCT operation check	PWB-C1 LCT PJ6C1 LCT-1 to 4	PC-403 C-8
7	Change PWB-C1 LCT
8	Change PWB-M