Konica-Minolta bizhub C3851

Scanner system: fog

Troubleshooting procedure

Step	Section	Check item	Result	Action
1	Original	Original is damaged or dirty.	YES	Change original.
2	Basic screen Density	The problem is eliminated when the image is produced in the manual exposure setting.	NO	Try another exposure level in manual.
1-Side
3	ADF	Original pad is dirty.	YES	Clean.
4		ADF does not lie flat.	YES	Replace ADF if it is deformed or hinges are broken.
5	Original glass	Original glass is dirty.	YES	Wipe the surface clean with a soft cloth.
6		The problem has been eliminated through the checks of steps up to 5.	NO	Replace the scanner unit.
				Replace MFPB.
2-Sided
7	When ADF is being used: 2nd side	CIS reading section is dirty.	YES	Clean.
8		The problem has been eliminated through the checks of steps up to 7.	NO	Replace the ADF.

Scanner system: blurred image, blotchy image

Troubleshooting procedure

Step	Section	Check item	Result	Action
1	Original	Original does not lie flat.	YES	Change original.
1-Side
2	ADF	ADF does not lie flat.	YES	Replace ADF if it is deformed or hinges are broken.
3	Original glass	Original glass tilts.	YES	Position original glass correctly. Check original loading position.
4		The problem has been eliminated through the checks of steps up to 3.	NO	Replace the scanner unit.
2-Sided
5	When ADF is being used: 2nd side	CIS module is tilted.	YES	Corrected to the correct position.
			NO	Replace the ADF.

Scanner system: moire

Troubleshooting procedure

Step	Section	Check item	Result	Action
1	Original	Moire distortions recur even after the orientation of original has been changed.	NO	Change the original orientation.
2	Basic screen Original Type	Moire distortions recur even after the original mode has been changed.	YES	Select Text mode or Photo mode.
3	Basic screen Zoom	The problem has been eliminated through the checks of steps up to 2.	NO	Change the zoom ratio.