Konica-Minolta bizhub C3350
Troubleshooting. Image Quality Problem. Printer monocolor 3
Printer monocolor: foggy background
Troubleshooting procedure
Step | Section | Check item | Result | Action |
---|---|---|---|---|
1 | IDC sensor | The surface of the toner density sensor is dirty. | YES | Clean. |
2 | Imaging unit | Dirty on the outside. | YES | Clean. |
3 | PH unit | The surface of the PH window is dirty. | YES | Clean with cleaning jig. |
4 | Printer control board (PRCB) | Check the connection of connectors, harness, and flat cables between PRCB and PH unit, and correct if necessary. | NO | Change printer control board. |
5 | The problem has been eliminated through the checks of steps up to 4. | NO | • Replace the imaging unit. • Replace the PH unit. • Replace the high voltage power supply. |
Printer monocolor: void areas, white spots
Troubleshooting procedure
Step | Section | Check item | Result | Action |
---|---|---|---|---|
1 | Image Check | There are void areas at the front side or high density section. | YES | Printer: low image density |
2 | There is void area at the rear side section. | YES | Make the following adjustment: [Service Mode] -> [Imaging Process Adjustment] - > [Transfer Voltage Fine Adj]. |
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3 | Imaging unit | The surface of the PC drum is scratched. | YES | Change imaging unit. |
4 | Toner cartridge | Foreign matter or caked toner in the toner cartridge. | YES | Remove foreign matter. |
5 | Installation environment | Is the atmospheric pressure at the installation site low? | YES | Make the following adjustment: [Service Mode] -> [Machine] -> [Printer Adjustment] -> [Image ADJ Param]. |
Printer monocolor: colored spots
Troubleshooting procedure
Step | Section | Check item | Result | Action |
---|---|---|---|---|
1 | Imaging unit | Developing bias contact terminal makes good connection. | NO | Clean contact terminal and check terminal position. |
2 | The surface of the PC drum is scratched. | YES | Replace the imaging unit. | |
3 | Dirty on the outside. | YES | Clean. |