Brother Hl 3040cn User Manual

Troubleshooting
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Jam Inside (Paper jam inside the printer)6
 
Jam Inside
If a paper jam occurs inside the printer, follow these steps:
aTurn off the printers power switch and unplug the AC power cord.
bFully open the top cover by lifting up on the handle (1). 
CAUTION 
After you have just used the printer, some internal parts will be extremely hot. Wait at least 10 minutes for 
the printer to cool down before continuing to the next step. 
 
1
 

Troubleshooting
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cTake out all four drum unit and toner cartridge assemblies. 
IMPORTANT
 We recommend that you place each drum unit and toner cartridge assembly on a clean, flat surface with 
a sheet of disposable paper or cloth underneath it in case you accidentally spill or scatter toner.
 To prevent damage to the printer from static electricity, DO NOT touch the electrodes shown in the 
illustration.
 
 Handle the toner cartridges carefully. If toner scatters on your hands or clothes, wipe or...

Troubleshooting
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dPull out the jammed paper slowly. 
eSlide each drum unit and toner cartridge assembly into the printer. Make sure that you match the toner 
cartridge color to the same color label on the printer for all four drum unit and toner cartridge assemblies.
fClose the top cover of the printer.
gPlug the printer back in, and then turn on the power switch.
  
C - Cyan
M - MagentaY - Yellow
K - Black
C
M
Y
K
 

Troubleshooting
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Improving the print quality6
If you have a print quality problem, print a test page first (see Machine Info. on page 83). If the printout looks 
good, the problem is probably not the printer. Check the interface cable or try the printer on another computer. 
If the printout have a quality problem, check the following steps first. And then, if you still have a print quality 
problem, check the chart below and follow the recommendation.
aCheck that you use the paper that meets our...

Troubleshooting
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White streaks or bands down the 
page
 

Wipe the windows of LED head with a dry lint free soft cloth. (See Cleaning 
the LED head on page 130.)

Clean the drum unit. (See Large spots on the printed pages in Cleaning the 
drum unit on page 134.)

Identify the missing color and put in a new toner cartridge. (See Replacing the 
toner cartridges on page 105.)
To identify the color of the toner cartridge, visit us at 
http://solutions.brother.com/
 to view our FAQs and troubleshooting...

Troubleshooting
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Colored lines across the page
 

Replace the toner cartridge that matches the color of the line. (See Replacing 
the toner cartridges on page 105.)
To identify the color of the toner cartridge, visit us at 
http://solutions.brother.com/
 to view our FAQs and troubleshooting tips.

Put in a new drum unit. (See Replacing the drum units on page 113.)
To identify the color of the drum unit, visit us at http://solutions.brother.com/
 
to view our FAQs and troubleshooting tips.
White...

Troubleshooting
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Colored spots at 30mm
 

Identify the color causing the problem and put in a new toner cartridge. (See 
Replacing the toner cartridges on page 105.)
To identify the color of the toner cartridge, visit us at 
http://solutions.brother.com/
 to view our FAQs and troubleshooting tips.
Toner scatter or toner stain
 

Check the printer’s environment. Conditions such as high humidity and high 
temperatures may cause this print quality problem. (See To use the printer 
safely on page ii.)...

Troubleshooting
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The color of your printouts is not 
what you ex pected
Make sure toner save mode is off in the control panel or the printer driver.

Perform the calibration. (See Calibration on page 96.)

Adjust the color by using the custom setting in the driver and by using the 
control panel. Colors the printer can print and colors you see on a monitor are 
different. The printer may not be able to reproduce the colors on your monitor. 
(See Color Correction on page 90.)

If colors appear in the...

Troubleshooting
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Color misregistration
 

Make sure that the printer is on a solid level surface.

Perform the auto color registration using the control panel (see Auto 
Registration on page 97) or perform the manual color registration using the 
control panel (see Manual Registration on page 98).

Identify the color causing the problem and put in a new drum unit. (See 
Replacing the drum units on page 113.)
To identify the color of the drum unit, visit us at http://solutions.brother.com/
 
to view...

Troubleshooting
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Poor fix ing
 

Make sure that the media type setting in the driver matches the type of paper 
you are using. (See About paper on page 1.)

Make sure that two
 gray levers inside the back cover are in the up position.

Choose Improve Toner Fixing mode in the printer driver. See Improve Print 
Output in Improve Print Output on page 44 (For Windows
® printer driver), 
Advanced options on page 50 (For Windows
® BR-Script printer driver) or 
Print Settings on page 59 (For Macintosh...