Image defects which appear periodically may be caused by failure of a roller. Specify the cause referring to the diameters of the rollers or pitch which appears in the image as shown in the table below.
No. | Parts name | Diameter | The pitch which |
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| appears in the image |
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1 | Develop roller | Ø 20.0 mm | 37.4 mm |
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2 | Exposure drum | Ø 24.0 mm | 75.0 mm |
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3 | Heat roller in the fuser unit | Ø 25.0 mm | 78.5 mm |
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4 | Pressure roller ASSY in the fuser unit | Ø 25.0 mm | 78.5 mm |
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Image defect related problems are end user recoverable if following the User Check items. If the same problem occurs, follow each procedure in the order of the number described in the Step column in the tables below.
Light on the whole pageUser Check
- Check the machine’s environment. High temperature and high humidity conditions can cause this problem.
- If the whole page is light, toner save mode may be on.
- Replace the toner cartridge or drum unit with a new one. - Implement calibration from the control panel.
Step | Cause | Check | Result | Remedy |
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1 | Transfer HVPS | Is the transfer HVPS PCB | Yes | Replace the transfer |
| PCB failure | ASSY connected |
| HVPS PCB ASSY. |
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| correctly? |
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2 | Engine PCB | Is the harness between | Yes | Replace the engine PCB |
| failure | the HVPS PCB and |
| ASSY. |
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| engine PCB connected |
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| correctly? |
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3 | Charge HVPS | Is the harness of the | Yes | Replace the charge |
| PCB failure | HVPS PCB connected |
| HVPS PCB ASSY. |
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| correctly? |
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4 | Laser unit failure | Is the problem solved after | Yes | Replace the laser unit. |
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| replacing the laser unit? |
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Confidential |