Konica-Minolta bizhub PRESS 1250P

Printer system:
White lines in sub scan direction,
White bands in sub scan direction,
Black lines in sub scan direction,
Black bands in sub scan direction

Troubleshooting procedure

	Section	Check item	Result	Action
1	Paper	It occurs on the particular paper.	YES	Check the setting of the paper type.
2	User mode →MACHINE →Adjustment →Charge Manual Cleaning	“Charge Manual Cleaning” solves the trouble.	YES	Conduct “Charge Manual Cleaning”.
3	Write section	The dirt adheres to the surface of LPH.	YES	Clean LPH
4	Charging section	Charger wire and charger control plate have foreign objects.	YES	Cleaning Replace the charger wire.
5	Cleaning section	Some parts on the cleaning blade are left to wipe.	YES	Cleaning Replace the cleaning blade
6	Photo conductor section	Drum separation claws have dirt.	YES	Cleaning Check the drum separation claws action
7	Fusing section	Fusing separation claws have dirt.	YES	Cleaning Check the fusing separation claws action
8	Check the printer	Check the transferring section, the developing section and the conveyance section.	NO	Clean, Replace
9	Connector, wiring	There is no problem on the image processing board, the overall control board, the write section, and the connector/wiring of the printer control board.	NO	Reconnect the connector Replace the wiring
10	Image Stabilization	The image stabilization solves the trouble.	NO	Go on to the next step.
11	Service mode → Machine Adjustment → LPH Adjustment	Conduct the gap adjustment between LPH chips, conduct the black lines adjustment, and the problem is solved.	NO	Go on to the next step.
12		The problem has been eliminated through the checks of steps up to 11.	NO	Replace LPH → Check or replace the charging section → Replacing of the drum → Check or replace the transferring section → Check or replace the developing section → Replace the image processing board