DIFFICULTY | SUGGESTIONS | ||||
Printed pages are stained with | Clean the machine’s interior and the primary corona wire of drum | ||||
toner or have vertical stripes. | unit. (See Regular Maintenance, page 130 and Cleaning the Drum | ||||
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| Unit, page 131.) Make sure that the tab of the corona wire is at the |
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| home position. If after cleaning, you still see dark stripes or toner |
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| stains and the display shows CHANGE DRUM SOON, replace the |
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| drum unit with a new one. |
Dark Stripes or Toner Stains | |||||
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Printed pages have white | Make sure that you use paper that meets the specifications. Rough | ||||
spots in black text and | surface or thick media can cause the problem. If you still see white | ||||
graphic areas. | spots and the display shows CHANGE DRUM SOON, replace the | ||||
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| drum unit with a new one. |
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| White Spots |
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Toner scatters and stains the | Adjust the print conditions by setting the Print Density function. | ||||
printed page. | Clean the machine’s interior. (See Regular Maintenance, page 130 | ||||
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| and Cleaning the Drum Unit, page 131.) Make sure that you use |
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| paper that meets specifications. (See Acceptable Paper, page 62.) If |
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| you still have scattered toner and the display shows CHANGE |
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| DRUM SOON, replace the drum unit with a new one. | ||
Scattering Toner | |||||
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The whole page is printed | Wipe the electric terminals. (See Regular Maintenance, page 130 | ||||
black. | and Cleaning the Drum Unit, page 131.) Also, do not use heat- | ||||
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| sensitive paper as it will cause this problem. After cleaning, if the |
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| printed pages are still black and the display shows CHANGE |
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| DRUM SOON, replace the drum unit with a new one. |
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| Black Page |
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Nothing is printed on the | Make sure that the toner cartridge is not empty. Wipe the electric | ||||
page. | terminals referring to Regular Maintenance, page 130 and Cleaning | ||||
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| the Drum Unit, page 131. Make sure that a torn piece of paper does |
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| not remain on the scanner window. |
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| White page |
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Printed pages are marked | Markings may disappear by themselves. Try copying at multiple | ||||
regular intervals. | pages to clear this problem. Markings may occur if the machine has | ||||
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| not been used for a long time. A possible cause is that the surface of |
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| the drum is marked or damaged by excessive exposure to light. In |
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| this case, replace the drum unit with a new one. |
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Example of Regular Marking |
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126Chapter 18