Konica-Minolta bizhub 308e

1. White line
2. White band
3. Black line
4. Black 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", "Black(1PC)", and "Full Bleed", enter "64" for Density, and load tray 2 with A4 paper. Press the start key. This runs a print cycle. • Check the image after printing and the abnormal image is evident.	NO	Go to scanner troubleshooting procedure.

Engine troubleshooting procedure

Step	Section	Check item	Result	Action
1	Service Mode -> Table Number	Select [Service Mode] -> [State Confirmation] -> [Table Number]. The measured value is close to the standard value. Developing bias: Vdc-K: close to the standard value of -800 to 0 Grid voltage: Vg-K: close to the standard value of -1600 to 0	NO	Check the high voltage unit and the imaging unit for wiring and connection. Replace the high voltage unit.
2	Write section	Sharp white line or black line is blurry.	YES	Clean the PH window.
3	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.
4	Photoconductor section	There is a positive contact between the electrostatic charger application terminals and the high voltage unit connection terminals (C1).	NO	Clean or correct the terminal.
5	Developing section	There is a positive contact between the developing bias application terminals and the high voltage unit connection terminals (B1).	NO	Clean or correct the terminal.
6	Photoconductor section	Scratches on photoconductor.	YES	Clean. Replace the imaging unit.
7	Photoconductor section	Toner line or dirt on photoconductor. (improper cleaning)	YES	Replace the imaging unit.
8	Photoconductor section	Faint lines evident on the entire surface as if the surface were brushed off.	YES	Replace the imaging unit.
9	1st transfer section	There is a positive contact between the transfer belt application terminals and the high voltage unit connection terminals (T1).	NO	Clean or correct the terminal.
10	1st transfer section	Scratches or dirt on 1st transfer roller.	YES	Clean. Replace the transfer belt unit.
11	Developing section	Toner bristles not even on the developing roller, resulting in a line or band.	YES	Replace the imaging unit.
12	Paper path	There is dirty or foreign matter on paper path.	YES	Check or clean the paper path including the duplex section.
13	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.
14	Transfer belt unit	Dirt, scratches, or foreign matter on the transfer belt.	YES	Clean. Replace the transfer belt unit.
15	2nd transfer section	Dirt or foreign matter on the 2nd transfer roller.	YES	Remove the foreign matter. Replace the transfer roller unit.
16	2nd transfer section	There is a positive contact between the application terminals of the 2nd transfer and the connection terminals (T2) and ground terminal of the high voltage unit.	NO	Clean or correct the terminal.
17	Fusing unit	There is dirty or foreign matter on paper path of fusing unit.	YES	Clean. (Disassembling the fusing unit is prohibited.)
18	Fusing unit	Scratches on roller, pad, and belt in fusing unit.	YES	Replace the fusing unit.
			NO	Replace the PH unit. 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 10.
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 13.
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	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.
8	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.
9	Parts along scanning path	Light guide or lens array is dirty.	YES	Clean.
			NO	Replace the CIS module.
Main body side_DF original reading section
10	Main body side_reading section	Original reading glass of main body is dirty.	YES	Clean.
11	Service Mode -> Read Pos Adj	Select [Service Mode] -> [ADF] -> [Read Pos Adj] and the image trouble is eliminated.	NO	Go to the next step.
12	Parts along scanning path	Light guide or lens array is dirty.	YES	Clean.
			NO	Replace the CIS module.
DF side_original reading section
13	CIS glass cleaning	CIS glass is dirty.	YES	Clean.
14	CIS reading section	CIS reading section is dirty.	YES	Clean.
15	When DF is being used: 2nd side	Shading correction surface of DF is dirty.	YES	Clean.
			NO	Replace the DF CIS module assy.