Brother Hl5370dw Owners Manual

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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 take out the drum unit and toner cartridge assembly. The jammed paper will be pulled out with 
the drum unit and toner cartridge assembly. 
						

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IMPORTANT
 
We recommend that you put the drum unit and toner cartridge assembly on a piece of disposable paper or 
cloth in case you accidentally spill or scatter toner.
 To prevent damage to the printer caused by static electricity, DO NOT touch the electrodes shown in the 
illustration.
 
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. 
						

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ePull the jammed paper down and out of the printer.
fPush down the blue lock lever and take the toner cartridge out of the drum unit. Clear the jammed paper 
if there is any inside the drum unit.
IMPORTANT
 
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.
  
						

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gPut the toner cartridge back into the drum unit until you hear it lock into place. If you put the cartridge in 
properly, the blue lock lever will lift automatically.
hOpen the front cover. Put the drum unit and toner cartridge assembly back in the printer.
iPut the paper tray firmly back in the printer.
jClose the front cover.
kMake sure that the Paper LED is off and then, the Status LED lights green. 
						

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Jam Rear / Duplex 7
If a paper jam occurs behind the back cover (back output tray) or inside the duplex tray, the printer will flash 
the Back Cover and Paper LED as shown below.
CAUTION 
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. If you do this, you may get burned.
  
						

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Clear the jammed paper as follows. 
aPress the cover release button and then open the front cover.
bSlowly take out the drum unit and toner cartridge assembly. The jammed paper will be pulled out with 
the drum unit and toner cartridge assembly.
IMPORTANT
 
We recommend that you put the drum unit and toner cartridge assembly on a piece of disposable paper or 
cloth in case you accidentally spill or scatter toner.
 To prevent damage to the printer caused by static electricity, DO NOT touch the electrodes shown in the 
illustration.
  
						

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cOpen the back cover.
dPull the tabs at the left and right hand sides toward you to open the fuser cover (1).
eUsing both hands, gently pull the jammed paper out of the fuser unit.
CAUTION 
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.
 
1 
						

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fPut the drum unit and toner cartridge assembly back in the printer (press firmly).
gFully close the front and back covers.
hPull the duplex tray completely out of the printer.
iPull the jammed paper out of the printer or the duplex tray.
j Put the duplex tray back in the printer.
kMake sure that the Back Cover and Paper LED are off and then, the Status LED lights green. 
						

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Improving the print quality7
If you have a print quality problem, print a test page first (see Print a test page on page 85). 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 fault. See Positioning the printer 
on page 5.
„If the whole page is too light, Toner Save Mode may be on. Turn off Toner Save 
Mode in the printer Properties tab of the driver.
„Put in a new toner cartridge. See Replacing the toner cartridge on page 95.
„Put in a new drum unit. See Replacing the drum unit on page 102.
„You may clear the problem by wiping the scanner window with a soft cloth. See 
Cleaning the inside of the printer on page 108.
Gray background„Make sure that you use paper that meets our specifications. See About paper on 
page 6.
„Check the printer’s environment. Conditions such as high temperatures and high 
humidity can increase the amount of background shading. See Positioning the 
printer on page 5.
„Put in a new toner cartridge. See Replacing the toner cartridge on page 95.
„Put in a new drum unit. See Replacing the drum unit on page 102.
Ghost„Make sure that you use paper that meets our specifications. Rough-surfaced 
paper or thick print media may cause this problem. See About paper on page 6.
„Make sure that the media type setting in the driver matches the type of paper you 
are using. See About paper on page 6.
„Put in a new drum unit. See Replacing the drum unit on page 102.
„The fuser unit may be contaminated. Call Brother Customer Service.
Toner specks„Make sure that you use paper that meets our specifications. Rough-surfaced 
paper may cause the problem. See About paper on page 6.
„The drum unit may be damaged. Put in a new drum unit. See Replacing the drum 
unit on page 102.
„The fuser unit may be contaminated. Call Brother Customer Service. 
						

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Hollow print„Make sure that you use paper that meets our specifications. See About paper on 
page 6.
„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 printer on page 5.
„The drum unit may be damaged. Put in a new drum unit. See Replacing the drum 
unit on page 102.
All black„Clean the primary corona wire inside the drum unit by sliding the blue tab. Be sure 
to return the blue tab to the home position (a). See Cleaning the corona wire on 
page 113.
„The drum unit may be damaged. Put in a new drum unit. See Replacing the drum 
unit on page 102.
„The fuser unit may be contaminated. Call Brother Customer Service.
White lines across the page„Make sure that you use paper that meets our specifications. A rough surfaced 
paper or thick print media can cause problems.
„Make sure that you choose the proper media type in the printer driver.
„The problem may disappear by itself. Print multiple pages to clear this problem, 
especially if the printer has not been used for a long time.
„The drum unit may be damaged. Put in a new drum unit. See Replacing the drum 
unit on page 102.
Lines across the page„Clean the inside of the printer and the primary corona wire in the drum unit. See 
Cleaning the inside of the printer on page 108 and Cleaning the corona wires on 
page 113.
„The drum unit may be damaged. Put in a new drum unit. See Replacing the drum 
unit on page 102.
White lines, bands or ribbing 
across the page„Check the printers environment. Conditions such as high humidity and high 
temperatures may cause this print quality problem. (See Positioning the printer 
on page 5.)
„If the problem is not solved after printing a few pages, put in a new drum unit. 
(See Replacing the drum unit on page 102.)
Examples of poor print 
qualityRecommendation