Oki C821 SYMPTOMS, STEPS TO TAKE, POSSIBLE CAUSES, DEALING WITH UNSATISFACTORY PRINTING

DEALING WITH UNSATISFACTORY PRINTING

SYMPTOMS	POSSIBLE CAUSES	STEPS TO TAKE
Vertical white lines can	The LED head is dirty.	Wipe the LED head with a soft,
be seen on the printed		lint-free cloth.
page.
	The toner is low.	Open the top cover and tap the
		cartridge a few times to evenly
		distribute any remaining toner. If
		symptoms persist, replace the
		toner cartridge.
	Foreign materials may be	Replace the image drum
	present in the image drum.	cartridge.
	Light-shielding film of the	Wipe the film with a soft, lint-
	image drum cartridge is	free cloth.
	dirty.
Printed images are	The LED head is dirty.	Wipe the LED head with a soft,
fading vertically.		lint-free cloth.
	The toner is low.	Open the top cover and tap the
		cartridge a few times to evenly
		distribute any remaining toner. If
		symptoms persist, replace the
		toner cartridge.
	The paper is not suitable for	Use recommended paper.
	the printer unit.
Printing is light.	The toner cartridge is not	Reinstall the toner cartridge.
	properly seated.
	The toner is low.	Open the top cover and tap the
		cartridge a few times to evenly
		distribute any remaining toner. If
		symptoms persist, replace the
		toner cartridge.
	The paper is moist.	Use paper stored in proper
		temperature and humidity
		conditions.
	The paper is not suitable for	Use recommended paper.
	the printer unit.
	Thickness and type of paper	Set the correct value of media
	are inappropriate.	type and media weight in the
		Media menu or set one value
		thicker for media weight.
	Recycled paper is being used.	Set one value thicker for media
		weight in the Media menu.
Partially faded images.	Paper is moist or dry.	Use paper stored in proper
White spots and lines		temperature and humidity
appear in solid		conditions.
printing.
Vertical lines appear.	The image drum cartridge is	Replace the image drum
	damaged.	cartridge.
	The toner is low.	Open the top cover and tap the
		cartridge a few times to evenly
		distribute any remaining toner. If
		symptoms persist, replace the
		toner cartridge.

Troubleshooting > 99