Brother International HL-5255DN-MICR MICR Owners Manual - English - Page 100

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7. Troubleshooting Examples of poor print quality Recommendation „ Make sure that you use paper that meets our specifications. See About paper on 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 printer on page 4. Hollow print „ 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 77. „ The drum unit may be damaged. Put in a new drum unit. See Replacing the drum unit on page 68. „ The fuser unit may be contaminated. Call Brother Customer Service. All black ABCDEFGH abcdefghijk ABCD abcde 01234 White lines across the page ABCDEFGH abcdefghijk ABCD abcde 01234 „ 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 toner cartridge on page 63. „ Clean the inside of the printer and the primary corona wire in the drum unit. See Cleaning on page 73. „ The drum unit may be damaged. Put in a new drum unit. See Replacing the drum unit on page 68. Lines across the page ABCDEFGH abcdefghijk ABCD abcde 01234 White lines down the page „ Make sure that a torn piece of paper is not inside the printer covering the scanner window. „ Wipe the scanner window with a soft cloth. See Cleaning the inside of the printer on page 74. „ The toner cartridge may be damaged. Put in a new toner cartridge. See Replacing the toner cartridge on page 63. „ The drum unit may be damaged. Put in a new drum unit. See Replacing the drum unit on page 68. 92

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7. Troubleshooting
92
Hollow print
Make sure that you use paper that meets our specifications. See
About paper
on
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 printer
on page 4.
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 77.
The drum unit may be damaged. Put in a new drum unit. See
Replacing the drum
unit
on page 68.
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 toner
cartridge
on page 63.
Lines across the page
Clean the inside of the printer and the primary corona wire in the drum unit. See
Cleaning
on page 73.
The drum unit may be damaged. Put in a new drum unit. See
Replacing the drum
unit
on page 68.
White lines down the page
Make sure that a torn piece of paper is not inside the printer covering the scanner
window.
Wipe the scanner window with a soft cloth. See
Cleaning the inside of the printer
on page 74.
The toner cartridge may be damaged. Put in a new toner cartridge. See
Replacing the toner cartridge
on page 63.
The drum unit may be damaged. Put in a new drum unit. See
Replacing the drum
unit
on page 68.
Examples of poor print
quality
Recommendation
ABCDEFGH
abcdefghijk
ABCD
abcde
01234
ABCDEFGH
abcdefghijk
ABCD
abcde
01234
ABCDEFGH
abcdefghijk
ABCD
abcde
01234