Brother Hl4570cdw Owners Manual

Troubleshooting 
155
6
eClose the fuser cover (1). 
Note
If you print on envelopes, pull down the envelope levers (2) to the envelope position again before closing 
the back cover.
 
fClose the back cover.
12 2 

Troubleshooting 
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6
Jam Inside (Paper jam inside the machine)6
 
Jam Inside
If a paper jam occurs inside the machine, follow these steps:
aTurn off the machines power switch and unplug the AC power cord.
bPress the front cover release button and then open the front cover. 
cHold the green handle of the drum unit. Pull the drum unit out until it stops.  

Troubleshooting 
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6
dTurn the green lock lever (1) at the left of the machine counterclockwise to the release position. Holding 
the green handles of the drum unit, lift the front of the drum unit and remove it from the machine.
 
IMPORTANT
• Hold the green handles of the drum unit when you carry it. DO NOT hold the sides of the drum unit.
 
• We recommend that you place the drum unit on a clean, flat surface with a sheet of disposable paper or 
cloth underneath it in case you accidentally spill or...

Troubleshooting 
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6
ePull out the jammed paper slowly. 
IMPORTANT
To avoid print quality problems, DO NOT touch the shaded parts shown in the illustration.
 
 
fMake sure the green lock lever (1) is in the release position as shown in the illustration.  
1 

Troubleshooting 
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6
gMatch the guide ends (2) of the drum unit to the c marks (1) on both sides of the machine, then gently 
slide the drum unit into the machine until it stops at the green lock lever.
 
hTurn the green lock lever (1) clockwise to the lock position. 
iPush the drum unit in until it stops. 
jClose the front cover of the machine.
Note
If you turn off the machine during Jam Inside, the machine will print incomplete data from your computer. 
Before you turn on the machine, delete the...

Troubleshooting 
160
6
Improving the print quality6
If you have a print quality problem, print a test page first (see Machine Info. on page 71). If the printout looks 
good, the problem is probably not the machine. Check the interface cable or try the machine on another 
computer. If the printout has 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 recommendations.
Note
Using non-Brother supplies may affect the...

Troubleshooting 
161
6
White streaks or bands down the 
page
 
Wipe the scanner windows with a dry lint-free soft cloth. (See Cleaning the 
inside of the machine on page 117.)
Clean the drum unit. (See Cleaning the drum unit on page 125.)
Identify the missing color and put in a new toner cartridge. (See Replacing the 
toner cartridges on page 97.)
To identify the color of the toner cartridge, visit us at 
http://solutions.brother.com/
 to view our FAQs and troubleshooting tips.
Colored streaks or...

Troubleshooting 
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6
White spots or hollow print
 
Make sure that the media type setting in the driver matches the type of paper 
you are using. (See Type and size of paper on page 2.)
Check the machine’s environment. Conditions such as high humidity can 
cause white spots or hollow print.
Completely blank or some colors 
are missing
 
Put in a new toner cartridge. (See Replacing the toner cartridges on page 97.)
To identify the color of the toner cartridge, visit us at...

Troubleshooting 
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6
Toner scatter or toner stain
 
Check the machine’s environment. Conditions such as high humidity and high 
temperatures may cause this print quality problem.
Identify the color causing the problem and put in a new toner cartridge. (See 
Replacing the toner cartridges on page 97.)
To identify the color of the toner cartridge, visit us at 
http://solutions.brother.com/
 to view our FAQs and troubleshooting tips.
If the problem continues, put in a new drum unit. (See Replacing the...

Troubleshooting 
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Color misregistration
 
Make sure that the machine is on a solid level surface.
Perform the auto color registration using the control panel (see Auto 
Registration on page 83) or perform the manual color registration using the 
control panel (see Manual Registration on page 84).
Put in a new drum unit. (See Replacing the drum unit on page 102.)
Put in a new belt unit. (See Replacing the belt unit on page 106.)
Uneven density appears 
periodically across the page
 
Perform the...