Brother Hl 4150cdn User Manual

Troubleshooting 155
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 156
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 157
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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 158
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 print...

Troubleshooting 159
6
Improving the print quality6
If you have a print quality problem, print a test page first (see Machine Info. on page 70). 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 160
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 116.)
 Clean the drum unit. (See  Cleaning the drum unit on page 124.)
 Identify the missing color and put in a new toner cartridge. (See  Replacing the 
toner cartridges  on page 96.)
To identify the color of the toner cartridge, visit us at 
http://solutions.brother.com/
 to view our FAQs and troubleshooting tips.
Colored streaks...

Troubleshooting 161
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 96.)
To identify the color of the toner cartridge, visit us at...

Troubleshooting 162
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 96.)
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...

Troubleshooting 163
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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 82) or perform the manual color registration using the 
control panel (see Manual Registration  on page 83).
 Put in a new drum unit. (See  Replacing the drum unit on page 101.)
 Put in a new belt unit. (See  Replacing the belt unit on page 105.)
Uneven density appears 
periodically across the page
 
...

Troubleshooting 164
6
Poor fixing
 
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.)
 Make sure that the 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 39 (For Windows
® 
printer driver),  Advanced options  on page 44 (For Windows
® BR-Script 
printer driver) or  Print Settings on page...