Brother 5340D, 5370DW, HL-5350DN manual 143

Troubleshooting

Examples of poor print		Recommendation
	quality
		„ The drum unit may be damaged. Put in a new drum unit. See Replacing the drum
		unit on page 103.
		„ The toner cartridge may be damaged. Put in a new toner cartridge. See
		Replacing the toner cartridge on page 95.
		„ Make sure that you use paper that meets our specifications. See About paper on
		page 6.
Black toner marks across the		„ If you use label sheets for laser printers, the glue from the sheets may sometimes
		stick to the OPC drum surface. Clean the drum unit. See Clean the drum unit as
	page	follows: on page 132.
		„ Do not use paper that has clips or staples because they will scratch the surface
		of the drum.
		„ If the unpacked drum unit is in direct sunlight or room light, the unit may be
		damaged.
		„ Clean the primary corona wire inside the drum unit by sliding the blue tab. See	7
		Cleaning the corona wire on page 114.
		„ Make sure the primary corona wire cleaner is at the home position (a).
		„ The drum unit may be damaged. Put in a new drum unit. See Replacing the drum
		unit on page 103.
		„ The toner cartridge may be damaged. Put in a new toner cartridge. See
Black lines down the page		Replacing the toner cartridge on page 95.
		„ The fuser unit may be smudged. Call your dealer or Brother Customer Service.
Printed pages have toner stains
down the page.
		„ Make sure that a torn piece of paper is not inside the printer covering the scanner
		window.
		„ Wipe the scanner window with a soft cloth. See Cleaning the inside of the printer
		on page 109.
		„ The toner cartridge may be damaged. Put in a new toner cartridge. See
		Replacing the toner cartridge on page 95.
White lines down the page		„ The drum unit may be damaged. Put in a new drum unit. See Replacing the drum
		unit on page 103.
		„ Make sure that the paper or other print media is loaded properly in the paper tray
		and that the guides are not too tight or too loose against the paper stack.
		„ Set the paper guides correctly. See Printing on plain paper, bond paper or
		transparencies from Tray 1, 2 or 3 on page 11.
		„ If you are using the multi-purpose tray, see Printing on plain paper, bond paper
		or transparencies from the MP tray on page 16.
Page skewed		„ The paper tray may be too full. See Printing on plain paper, bond paper or
		transparencies from Tray 1, 2 or 3 on page 11.
		„ Check the paper type and quality. See About paper on page 6.

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