Question about Canon imageCLASS D320 All-In-One Laser Printer
This is caused by a rotating part that is contaminated, most likely the drum that transfers the toner to paper.
A new drum or drum cartridge is probably needed.
There is a very remote chance that the high voltage that charges the drum is being modulated but I have seen this once in decades of service.
Posted on Aug 15, 2008
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Posted on Jan 02, 2017
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The inner side of the Document Cover (white sheet) (C) is easily damaged, so wipe it gently.
If the glass of the ADF (A) is stained with ink, correction fluid, or the like, black streaks may appear on the printed paper when the document is loaded in the ADF. With a clean, soft, lint-free cloth, wipe the glass of the ADF.
With a clean, soft, lint-free cloth, wipe the Platen Glass (D), the inner side of the Document Cover (white sheet) (C), the glass of the ADF (A), and the inner side of the ADF (white area) (B) gently. Make sure not to leave any residue, especially on the Platen Glass.
Cleaning the ADF Caution
Be sure to turn off the power and disconnect the power cord before cleaning the machine.
1. Open the Document Tray.
2. Open the Feeder Cover.
3. With a soft, clean, lint-free and dry cloth, wipe off any paper dust from the inside of the Feeder Cover (A).
4. After wiping, close the Feeder Cover by pushing it until it clicks into place.
5. Close the Document Tray.
6. Reconnect the power cord then turn on the machine.
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