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Examples of poor print quality	Recommendation
	 Make sure that you use paper that meets our specifications. See
	Acceptable paper and other print media on page 15.
	 Choose Thick Paper mode in the printer driver, choose Thick in
	the machine’s Paper Type menu setting or use thinner paper than
	you are currently using. See Paper Type on page 14 and Basic
	tab in the Software User's Guide.
	 Check the machine’s environment. Conditions such as high
	humidity can cause hollow print. See the Safety and Legal
	booklet.
Hollow print	 The drum unit may be damaged. Put in a new drum unit. See
	Replacing the drum unit on page 35.
	 Clean the corona wire inside the drum unit by sliding the green tab
	from left to right and right to left several times. Be sure to return
	the green tab to the home position (a). See Cleaning the corona
	wire on page 42.
	 The drum unit may be damaged. Put in a new drum unit. See
	Replacing the drum unit on page 35.
	 The fuser unit may be contaminated. Call your Brother dealer.

All black

Make sure that you use paper that meets our specifications. A

	rough surfaced paper or thick print media can cause problems.
	 Make sure that you choose the appropriate media type in the
ABCDEFGH
abcdefghijk	printer driver or in the machine’s Paper Type menu setting. See
A B C D	Acceptable paper and other print media on page 15 and Basic tab
	in the Software User's Guide.
a b c d e
	 The problem may disappear by itself. Print multiple pages to clear
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	this problem, especially if the machine has not been used for a
	long time.
White lines across the page	 The drum unit may be damaged. Put in a new drum unit. See
	Replacing the drum unit on page 35.

Clean the corona wire of the drum unit. See Cleaning the corona

	wire on page 42.
	 The drum unit may be damaged. Put in a new drum unit. See
ABCDEFGH
	Replacing the drum unit on page 35.
abcdefghijk

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Lines across the page

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