Konica-Minolta bizhub C3320i

1. White line
2. White band
3. Color line
4. Color band

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	Service Mode -> Stabilizer	Select [Service Mode] -> [Imaging Process Adjustment] - > [Stabilizer] -> [Stabilization Only] and the image trouble is eliminated.	NO	Go to the next step.
3	Service Mode -> Gradation Adjust	Select [Service Mode] -> [Imaging Process Adjustment] - > [Gradation Adjust] and the image trouble is eliminated.	NO	Go to the next step.
4	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 to determine which color causes the abnormal image.	1 to 3 colors	Go to the 1-color troubleshooting procedure.
			4 colors	Go to the 4-color troubleshooting procedure.
			None	Go to scanner troubleshooting procedure.

1-color troubleshooting procedure

Step	Section	Check item for the faulty color	Result	Action for the faulty color
1	Write section	Sharp white line or colored line is blurry.	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	There is a positive contact between the electrostatic charger application terminals and the high voltage unit connection terminals.	NO	Clean or correct the terminal.
4	Developing section	There is a positive contact between the developing bias application terminals and the high voltage unit connection terminals (Y: B4; M: B3; C: B2; K: B1).	NO	Clean or correct the terminal.
5	Photoconductor section	Scratches on photoconductor.	YES	Clean. Replace the drum unit.
6	Photoconductor section	Toner line or dirt on photoconductor. (improper cleaning)	YES	Replace the drum unit.
7	1st transfer section	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.
8	1st transfer section	Scratches or dirt on 1st transfer roller.	YES	Clean. Replace the transfer belt unit.
9	Developing section	Toner bristles not even on the developing roller, resulting in a line or band.	YES	Replace the developing unit.
			NO	Check the high voltage unit, developing unit, and the drum unit for wiring and connection. 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 or clean the paper path including the duplex section.
2	Transfer belt unit	Lines that can be removed by cleaning are evident on the transfer belt. (improper cleaning)	YES	Check or clean the cleaning blade. Replace the transfer belt unit.
3	Transfer belt unit	Dirt, scratches, or foreign matter on the transfer belt.	YES	Clean. Replace the transfer belt unit.
4	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.
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	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.
7	Fusing unit	Dirt or foreign matter on paper path or separation claw of the fusing unit.	YES	Clean. (Disassembling the fusing unit is prohibited.)
8	Fusing unit	Scratches on belt or roller in fusing unit.	YES	Replace the fusing unit.
			NO	Replace the high voltage unit. Replace the base board.

Scanner troubleshooting procedure

Step	Section	Check item	Result	Action
1	Original	Original is damaged or dirty.	YES	Change the original.
2	Original Type	Select [Copy] -> [Original Type] and change the setting, and the image trouble is eliminated.	YES	Correct the setting.
3	When original glass is being used: Service Mode -> Scan Area	Select [Service Mode] -> [Machine] -> [Scan Area] -> [Image Position: Leading Edge] and make the necessary adjustment, and the image trouble is eliminated.	NO	Go to the next step.
4	When original glass is being used	Original glass or original pad is dirty.	YES	Clean.
			NO	Replace the CCD unit.
5	When DF is being used: 1st side: End face of original is reproduced as a line	Select [Service Mode] -> [ADF] -> [Auto Stop Position Adjustment] -> [Main Scanning (Front)] and the image trouble is eliminated.	NO	Go to the next step.
6	When DF is being used: 2nd side: End face of original is reproduced as a line	Select [Service Mode] -> [ADF] -> [Auto Stop Position Adjustment] -> [Main Scanning (Back)] and the image trouble is eliminated.	NO	Go to the next step.
7	When DF is being used: 1st side	Document reading glass or document reading glass cleaning brush is dirty.	YES	Clean.
			NO	Replace the CCD unit.
8	When DF is being used: 2nd side	CIS glass or CIS cleaning brush is dirty.	YES	Clean.
			NO	Replace the CIS module.