Black toner marks across the ; Line across the page; Black lines down the page- Page 65

Troubleshooting and routine maintenance

53

B

Black toner marks across the 

page

„

Make sure that you use paper that meets our specifications. (See 

Acceptable paper and other print media

 on page 12.)

„

If you use label sheets for laser machines, the glue from the sheets 
may sometimes stick to the OPC drum surface. Clean the drum unit. 
(See 

Cleaning the drum unit

 on page 68.)

„

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.

„

The toner cartridge may be damaged. Put in a new toner cartridge. 
(See 

Replacing a toner cartridge

 on page 70.)

„

The drum unit may be damaged. Put in a new drum unit. (See 

Replacing the drum unit

 on page 74.)

Line across the page

„

Clean the laser scanner window and the primary corona wire inside 
the drum unit. (See 

Cleaning the laser scanner window

 on page 64 

and 

Cleaning the corona wire

 on page 66.)

„

The drum unit may be damaged. Put in a new drum unit. (See 

Replacing the drum unit

 on page 74.)

Black lines down the page

 Printed pages have toner 

stains down the page

„

Clean the primary corona wire inside the drum unit by sliding the 
green tab. Be sure to return the green tab to the home position (

a

). 

(See 

Cleaning the corona wire

 on page 66.)

„

The toner cartridge may be damaged. Put in a new toner cartridge. 
(See 

Replacing a toner cartridge

 on page 70.)

„

The drum unit may be damaged. Put in a new drum unit. (See 

Replacing the drum unit

 on page 74.)

„

The fuser unit may be smudged. Call Brother Customer Service at 
1-877-BROTHER (1-877-276-8437) (in USA) or 1-877-BROTHER (in 
Canada).

Examples of poor print 
quality

Recommendation

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