One color spots or dirtUser Check
-Damp (wet) paper might be used. Try changeing to freshly unopened paper.
-Toner may be empty. Replace the toner cartridge with a new one.
-If the same problem occurs after printing a few pages, the adhesive of a label or the like, paper powder or dirt may be attached on the surface of the exposure drum.
Feed the drum cleaning sheet from the MP tray one to three times to clean the drum. (For the procedure, refer to “Drum Unit Cleaning Mode” in Chapter 5.)
When the same problem occurs after feeding the drum cleaning sheet, wipe off the dirt on the exposure drum with a cotton swab.
(For the procedure, refer to Note in the previous pages.)
-The drum unit may be damaged. Replace the drum unit with a new one.
Step | Cause | Check | Result | Remedy |
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1 | Drum unit failure | Are the spots at 75.0 mm | Yes | If the surface of the |
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| (exposure drum |
| exposure drum is |
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| circumference) intervals? |
| scratched, replace the |
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| drum unit. |
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2 | Drum unit | Are the electrodes on the | Yes | Clean both electrodes |
| connection failure | drum unit and machine |
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| body dirty? |
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3 | Fuser unit failure | Are the spots at 78.5mm | Yes | Replace the fuser unit. |
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| (heat roller |
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| circumference) intervals? |
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4 | Transfer HVPS | Is the problem solved after | Yes | Replace the Transfer |
| PCB failure | replacing the transfer |
| HVPS PCB ASSY. |
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| HVPS PCB ASSY? |
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5 | 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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User Check
-Clean the inside of the machine and the corona wire in the drum unit. If the same problem occurs after cleaning, replace the drum unit with a new one.
-The paper tray ground terminal provided in the machine body may be dirty. Clean the contact with a dry cloth.
Confidential |