Brother MFC-8380DN, MFC-8370DN C D, C D, c d e, c d e, A B, a b, a b c d e

						Troubleshooting and routine maintenance
Examples of poor print						Recommendation
quality
						„ Clean the corona wire inside the drum unit by sliding the blue tab. Be
						sure to return the blue tab to the home position (a). (See Cleaning the
						corona wire on page 149.)
						„ The drum unit may be damaged. Put in a new drum unit. (See	C
						Replacing the drum unit on page 157.)
						„ The fuser unit may be contaminated. Call your Brother dealer for
						service.
		All black
						„ Make sure that you use paper that meets our specifications. (See
						Acceptable paper and other print media on page 14.)
	ABCDEFGH					„ If you use label sheets for laser machines, the glue from the sheets
	abcdefghijk
						may sometimes stick to the OPC drum surface. Clean the drum unit.
	A B C D
						(See Cleaning the drum unit on page 150.)
	a b c d e
						„ Do not use paper that has clips or staples because they will scratch
0 1 2 3 4						the surface of the drum.
Black toner marks across the						„ If the unpacked drum unit is in direct sunlight or room light, the unit
		page				may be damaged.
						„ The toner cartridge may be damaged. Put in a new toner cartridge.
						(See Replacing a toner cartridge on page 154.)
						„ The drum unit may be damaged. Put in a new drum unit. (See
						Replacing the drum unit on page 157.)
						„ Clean the laser scanner window and the corona wire inside the drum
						unit. (See Cleaning the laser scanner window on page 148 and
						Cleaning the corona wire on page 149.)
		ABCDEFGH
		abcdefghijk				„ The drum unit may be damaged. Put in a new drum unit. (See
		A B			C D
						Replacing the drum unit on page 157.)
				c d e
		a b
			2 3 4
	0 1

Line across the page

„Clean the corona wire inside the drum unit by sliding the blue tab. Be sure to return the blue tab to the home position (a). (See Cleaning the

	ABCDEFGH		corona wire on page 149.)
	abcdefghijk		„ The toner cartridge may be damaged. Put in a new toner cartridge.
	A	C D
			(See Replacing a toner cartridge on page 154.)
	a	c d e	„ The drum unit may be damaged. Put in a new drum unit. (See
0		2 3 4	Replacing the drum unit on page 157.)
Black lines down the page			„ The fuser unit may be smudged. Call your Brother dealer for service.
Printed pages have toner
stains down the page

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