Konica-Minolta bizhub C3300i
Troubleshooting. IQ. Uneven density 1
Initial troubleshooting procedure
Step | Section | Check item | Result | Action |
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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 |
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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 | High image density original | Uneven density in sub scan direction occurs at a pitch of 40 mm to 50 mm when a multi-copy cycle is run using an original with high image density (50% or more). | YES | Feed 10 to 20 blank sheets of paper with no originals placed, as the developing unit fails to keep up with a high demand for toner. |
2 | Service Mode -> Density Balance Adjust | Select [Service Mode] -> [Imaging Process Adjustment] - > [Density Balance Adjust] and the image trouble is eliminated. |
NO | Go to the next step. |
3 | Service Mode -> TCR Level Setting | Select [Service Mode] -> [Imaging Process Adjustment] - > [TCR Level Setting] and make the necessary adjustment, and the image trouble is eliminated. |
NO | Go to the next step. |
4 | Write section | Dirt or foreign matter on the dust-proof glass of the PH. | YES | Clean the PH window. |
5 | 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. |
6 | Photoconductor section | Dirt, scratches, or foreign matter on the photoconductor. | YES |
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7 | 1st transfer section | Dirt, scratches, or foreign matter on the 1st transfer roller. | YES |
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8 | 1st transfer section | Faulty pressure/retraction operation of the 1st transfer roller. | YES |
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9 | Developing section | Toper hopper operates improperly or contains foreign matter. | YES |
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10 | Developing section | Toner bristles not even on the developing roller, resulting in a line or band. | YES | Replace the developing unit. |
NO |
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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 | Lines that can be removed by cleaning are evident on the transfer belt. (improper cleaning) | YES |
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3 | Transfer belt unit | Dirt, scratches, or foreign matter on the transfer belt. | YES |
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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 | Transfer belt unit | Transfer belt rotates faultily. | YES | Replace the transfer belt unit. |
6 | 2nd transfer section | Dirt or foreign matter on the 2nd transfer roller. | YES |
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7 | 2nd transfer section | Faulty pressure/retraction operation of the 2nd transfer roller. | YES |
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8 | 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. |
9 | Fusing unit | There is dirty or foreign matter on paper path of fusing unit. | YES | Clean. (Disassembling the fusing unit is prohibited.) |
10 | 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 |
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