Konica-Minolta bizhub PRESS 1250

Troubleshooting. IQ07. Printer system: Uneven density in main scan direction

Printer system:
Uneven density in main 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, and fix it.
2	Setting menu → Function setting → Density setting → Image density selection	Change the setting value of the image density to the plus, and the trouble is solved.	NO	Go on to the next step.
3	Check the printer	Check mainly on the charging section, transferring section, photo conductor section, and the developing section.	NO	Clean, Replace
4	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
5	Image Stabilization	The image stabilization solves the trouble.	NO	Go on to the next step.
6	Tray setting → Change Set → Process adjustment → Transfer current offset adjustment	Conduct the transfer current offset adjustment and the problem is solved.	YES	Select the side and part which abnormal condition occurs, and lower the transfer current offset value every 5 steps.
7		The problem has been eliminated through the checks of steps up to 6.	NO	Check or replace the charging section → Replace the drum → Replace LPH → Check or replace the transferring section → Check or replace the developing section → Replace the image processing board → Replace the high voltage unit /1 → Replace the high voltage unit /2