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	Photoconductor section	Faint lines evident on the entire surface as if the surface were brushed off.	YES	Select [Service Mode] -> [Counter] -> [Life] and check the counter value of the Drum Unit. Replace the drum unit having the greatest counter value with a new one. (Not the drum unit of the color that has developed the lines, but the drum unit having the greatest counter value)
8	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.
9	1st transfer section	Scratches or dirt on 1st transfer roller.	YES	Clean. Replace the transfer belt unit.
10	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.

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	There is dirty or foreign matter on paper path of 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	When original glass is being used	A fault occurs in the image read through the original glass.	YES	Go to step 5.
3	When DF is being used: 1st side	A fault occurs in the image read from the 1st side while DF is being used.	YES	Go to step 11.
4	When DF is being used: 2nd side	A fault occurs in the image read from the 2nd side while DF is being used.	YES	Go to step 18.
Main body side_original glass
5	DF side_ Original pad	Original pad of DF is dirty.	YES	Clean.
6	Original glass	Original glass is dirty.	YES	Clean.
7	Shading sheet	Shading sheet is dirty.	YES	Clean.
8	End face of original is reproduced as a line	Select [Service Mode] -> [Machine] -> [Scan Area] -> [Scanner Image Side Edge] and make the necessary adjustment, and the image trouble is eliminated.	NO	Go to the next step.
9	Line occurring due to faulty shading	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.
10	Parts along scanning path	Mirror, lens, light guide or reflectors is dirty.	YES	Clean.
			NO	Replace the LED exposure unit. Replace the CCD unit.
Main body side_DF original reading section
11	Main body side_reading section	Document reading glass of main body is dirty.	YES	Clean.
12	DF side_ document reading glass cleaning brush	Document reading glass cleaning brush of DF is dirty.	YES	Clean.
13	Main body side_shading sheet	Shading sheet of main body is dirty.	YES	Clean.
14	When DF is being used: 1st side: End face of original is reproduced as a line	Select [Service Mode] -> [ADF] -> [Original Stop Position] -> [Sub Scanning Direction 1-Side] and make the necessary adjustment, and the image trouble is eliminated.	NO	Go to the next step.
15	Service Mode -> Read Pos Adj	Select [Service Mode] -> [ADF] -> [Read Pos Adj] -> [Auto Adjust] and the image trouble is eliminated.	NO	Go to the next step.
16	Line occurring due to faulty shading	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.
17	Parts along scanning path	Mirror, lens, light guide, or reflectors is dirty.	YES	Clean.
			NO	Replace the LED exposure unit. Replace the CCD unit.
DF side_original reading section
18	CIS glass cleaning	CIS glass is dirty.	YES	Clean.
19	CIS reading section	CIS reading section is dirty.	YES	Clean.
20	CIS cleaning brush	CIS cleaning brush is dirty.	YES	Clean.
21	Shading sheet	Shading sheet is dirty.	YES	Clean.
22	When is DF being used: 2nd side: End face of original is reproduced as a line	Select [Service Mode] -> [ADF] -> [Original Stop Position] -> [Sub Scanning Direction 2-Side] and make the necessary adjustment, and the image trouble is eliminated.	NO	Go to the next step.
23	When DF is being used: 2nd side: Home Read Position	Select [Service Mode] -> [ADF] -> [Home Read Position Adjust] and the image trouble is eliminated.	NO	Go to the next step.
24	Scanning section	CIS reading section is dirty.	YES	Clean.
			NO	Replace the CIS module.