Konica-Minolta bizhub C3350i

Initial troubleshooting procedure

Step	Section	Check item	Result	Action
1	Paper Setting	The paper to be used for printing does not match the paper type and size of paper setting selected on the machine.	YES	Make the paper setting again on the machine.
2	IDC sensor	IDC sensor is dirty.	YES	Clean.
3	Service Mode -> Stabilizer	Select [Service Mode] -> [Imaging Process Adjustment] - > [Stabilizer] -> [Stabilization Only] and the image trouble is eliminated.	NO	Go to the next step.
4	Service Mode -> Gradation Adjust	Select [Service Mode] -> [Imaging Process Adjustment] - > [Gradation Adjust] and the image trouble is eliminated.	NO	Go to the next step.
5	Image check	Select [Service Mode] -> [Test Mode] -> [Halftone Pattern]. Select "SINGLE", "HYPER", "Error diffusion", "1- Sided", "CMYK", and "Full Bleed", enter "64" for Density, and load tray 2 with A3 paper. Press the start key. This runs a print cycle for C, M, Y, and K in that order. Check the image after printing and the abnormal image occurs only with one color.	YES	Go to the 1-color troubleshooting procedure.
			NO	Go to the 4-color troubleshooting procedure.

1-color troubleshooting procedure

Step	Section	Check item for the faulty color	Result	Action for the faulty color
1	Write section	Dirt or foreign matter on the dust-proof glass of the PH.	YES	Clean the PH window.
2	Charging section	Foreign matter on charging roller.	YES	Lightly wipe the surface clean of foreign matter using hydro-wipe (65AA-99##). Note: Do not apply a strong force to the surface of the charging roller, as doing so can damage the surface.
3	Photoconductor section	Dirt, scratches, or foreign matter on the photoconductor.	YES	Clean. Replace the drum unit.
4	Photoconductor section	Photoconductor drives faultily.	YES	Correct. Replace the drum unit.
5	1st transfer section	Scratches or dirt on 1st transfer roller.	YES	Clean. Replace the transfer belt unit.
6	Developing section	Toner bristles not even on the developing roller, resulting in a line or band.	YES	Replace the developing unit.
			NO	Replace the PH unit. Replace the high voltage unit.

4-color troubleshooting procedure

Step	Section	Check item	Result	Action
1	Paper path	There is dirty or foreign matter on paper path.	YES	Check and clean the paper path including the duplex section.
2	Transfer belt unit	Dirt, scratches, or foreign matter on the transfer belt.	YES	Clean. Replace the transfer belt unit.
3	Transfer belt unit	There is a positive contact between the transfer belt application terminals and the high voltage unit connection terminals (Y: T1-4; M: T1-3; C: T1-2; K: T1-1).	NO	Clean or correct the terminal.
4	Transfer belt unit	Transfer belt rotates faultily.	YES	Correct. Replace the transfer belt unit.
5	2nd transfer section	Dirt or foreign matter on the 2nd transfer roller.	YES	Remove the foreign matter. Replace the transfer roller unit.
6	2nd transfer section	Faulty pressure/retraction operation of the 2nd transfer roller.	YES	Correct. Replace the transfer roller unit.
7	2nd transfer section	There is a positive contact between the application terminals of the 2nd transfer and the connection terminals (T2, E1) and ground terminal of the high voltage unit.	NO	Clean or correct the terminal.
8	Fusing unit	There is dirty or foreign matter on paper path of fusing unit.	YES	Clean. (Disassembling the fusing unit is prohibited.)
9	Service Mode -> Initialize + Image Stabilization	Select [Service Mode] -> [Imaging Process Adjustment] - > [Stabilizer] -> [Initialize + Image Stabilization] and [Gradation Adjust], and the image trouble is eliminated.	YES	Readjust.
			NO	Replace the fusing unit. Replace the high voltage unit. Replace the base board.