Brother HL 2142R User Manual

Troubleshooting
83
6
Paper handling6
First, make sure that you are using paper that meets Brother’s recommended paper specifications. (See 
About paperon page 5.)
ProblemRecommendation
The printer does not feed 
paper.„If there is paper in the paper tray, make sure it is straight. If the paper is curled, 
straighten it before printing. Sometimes it is helpful to remove the paper. Turn the 
stack over and put it back in the paper tray.
„Reduce the amount of paper in the paper tray, and then try again....

Troubleshooting
84
6
The paper slides off the back 
output tray.Follow these steps:
aRemove the output tray support flap 1 (1) from the top of the printer by first 
lifting the flap up.
Then push the flap to the left or right to release one of the posts (2) on the flap 
and pull up.
 
bAttach the support flap 1 (1) to the back output tray by inserting the posts of the 
support flap one at a time into the holes of the back output tray.
 
ProblemRecommendation
1
2
1
 

Troubleshooting
85
6
Paper jams and how to clear them6
If a paper jam occurs, the printer will flash the Error LED as shown below.
 
HOT SURFACE 
After you have just used the printer, some internal parts of the printer will be extremely hot. To prevent 
injury, when you open the front cover or back cover (back output tray) of the printer, DO NOT touch the 
shaded parts shown in the illustration. 
 
Clear the jammed paper as follows.
If the jammed paper is removed completely by following the steps below,...

Troubleshooting
86
6
Note
• Always remove all paper from the paper tray and straighten the stack when you add new paper. This helps 
prevent multiple sheets of paper from feeding through the printer at one time and prevents paper jams.
• Please confirm that you have installed both a toner cartridge and a drum unit in the machine. If you have 
not installed a drum unit or have installed the drum unit improperly, then this may cause a paper jam in 
your Brother machine.
 
aOpen the front cover. 
bSlowly...

Troubleshooting
87
6
cClose the front cover.
Note
Do not put the drum unit and toner cartridge assembly back in at this point.
 
dPull the paper tray completely out of the printer. 
ePull the jammed paper down and out of the printer. 
fOpen the back cover (back output tray). 
 

Troubleshooting
88
6
g Pull the tab toward you to open the fuser cover (1). 
hPull the jammed paper out of the fuser unit. 
HOT SURFACE 
After you have just used the printer, some internal parts of the printer will be extremely hot. Wait for the 
printer to cool down before you touch the internal parts of the printer.
 
 
iClose the back cover (back output tray).
1
 

Troubleshooting
89
6
jPush down the green lock lever and take the toner cartridge out of the drum unit. Clear the jammed paper 
if there is any inside the drum unit.
 
CAUTION 
Handle the toner cartridge carefully. If toner scatters on your hands or clothes, wipe or wash it off with cold 
water at once.
  
To avoid print quality problems, DO NOT touch the shaded parts shown in the illustrations.
    
 

Troubleshooting
90
6
kPut the toner cartridge back into the drum unit until you hear it lock into place. If you put the cartridge in 
properly, the green lock lever will lift automatically.
 
lOpen the front cover. Put the drum unit and toner cartridge assembly back in the printer. 
mPut the paper tray firmly back in the printer.
nClose the front cover.
oMake sure that the Error LED is now off.
 

Troubleshooting
91
6
Improving the print quality6
If you have a print quality problem, print a test page first (see Print a test pageon page 56). If the printout 
looks good, the problem is probably not the printer. Check the interface cable or try the printer on another 
computer.
This section gives information on the following topics.
Examples of poor print 
qualityRecommendation
 
Faint„Check the printer’s environment. Conditions such as humidity, high 
temperatures, and so on, may cause this print...

Troubleshooting
92
6
 
Hollow print„Make sure that you use paper that meets our specifications. See About 
paperon page 5.
„Choose Thick paper mode in the printer driver, or use thinner paper than what 
you are now using.
„Check the printer’s environment. Conditions such as high humidity can cause 
hollow print. See Positioning the printeron page 4.
„The drum unit may be damaged. Put in a new drum unit. See Replacing the drum 
uniton page 69.
 
All black„Clean the primary corona wire inside the drum unit...