Unstable color densityUser Check
- Replace the belt unit with a new one. - Replace the drum unit with a new one.
-Replace the waste toner box with a new one.
-Replace the toner cartridge with a new one.
Step | Cause | Check | Result | Remedy |
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1 | Drum unit | Are the electrodes on the | Yes | Clean both electrodes. |
| conduction failure | drum unit and machine |
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| body dirty? |
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2 | Toner cartridge | Are the electrodes on the | Yes | Clean both electrodes. |
| electrode | toner cartridge and |
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| connection failure | machine body dirty? |
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3 | Dirt on belt unit | Are the electrodes on the | Yes | Clean both electrodes. |
| electrode | belt unit and machine |
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| body dirty? |
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4 | Main PCB failure | Is the problem solved | Yes | Replace the main PCB |
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| after replacing the main |
| ASSY. |
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| PCB ASSY? |
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5 | Engine PCB | Is the problem solved | Yes | Replace the engine PCB |
| failure | after replacing the engine |
| ASSY. |
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| PCB ASSY? |
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6 | Transfer HVPS | Is the problem solved | Yes | Replace the transfer |
| PCB failure | after replacing the |
| HVPS PCB ASSY. |
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| transfer HVPS PCB |
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| ASSY? |
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7 | Charge HVPS | Is the problem solved | Yes | Replace the charge |
| PCB failure | after replacing the charge |
| HVPS PCB ASSY. |
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| HVPS PCB ASSY? |
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8 | Laser unit failure | Is the problem solved | Yes | Replace the laser unit. |
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| after replacing the laser |
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| unit? |
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Hollow printUser Check
- Select the ‘Thick paper mode’ in the printer driver, or use thinner paper than you are currently using.
- Check the machine’s environment, conditions such as high humidity may cause this situation to occur.
Step | Cause | Check | Result | Remedy |
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1 | Fuser unit failure | Is the problem solved | Yes | Replace the fuser unit. |
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| after replacing the fuser |
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| unit? |
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Confidential |