Brother International MFC 7440N Users Manual - English - Page 117

Faint, Toner Save, Properties, Toner specks, All black, Examples of poor print, quality - toner cartridge

Page 117 highlights

Troubleshooting and routine maintenance Examples of poor print quality ABCDEFGH abcdefghijk ABCD abcde 01234 Faint ABCDEFGH abcdefghijk ABCD abcde 01234 Toner specks All black Recommendation „ Check the machine's environment. Conditions such as humidity, high temperatures, and so on, may cause this print fault. (See Choosing a location on page 82.) „ If the whole page is too light, Toner Save mode may be on. Turn off Toner Save mode in the machine menu settings or Toner Save mode in the printer Properties of the driver. (See Toner save on page 22 or Advanced tab in the Software User's Guide on the CDROM.) „ Clean the scanner window and the corona wire of the drum unit. (See Cleaning the laser scanner window on page 120 and Cleaning the corona wire on page 122.) „ The toner cartridge may be damaged. Put in a new toner cartridge. (See Replacing a toner cartridge on page 126.) „ The drum unit may be damaged. Put in a new drum unit. (See Replacing the drum unit on page 130.) „ Make sure that you use paper that meets our specifications. Roughsurfaced paper may cause the problem. (See Acceptable paper and other print media on page 14.) „ Clean the corona wire and the drum unit. (See Cleaning the corona wire on page 122 and Cleaning the drum unit on page 123.) „ The drum unit may be damaged. Put in a new drum unit. (See Replacing the drum unit on page 130.) „ The fuser unit may be contaminated. Call Brother Customer Service. „ Clean the corona wire inside the drum unit by sliding the green tab. Be sure to return the green tab to the home position (a). (See Cleaning the corona wire on page 122.) „ The drum unit may be damaged. Put in a new drum unit. (See Replacing the drum unit on page 130.) „ The fuser unit may be contaminated. Call Brother Customer Service. B 103

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Troubleshooting and routine maintenance
103
B
Faint
±
Check the machine’s environment. Conditions such as humidity, high
temperatures, and so on, may cause this print fault. (See
Choosing a
location
on page 82.)
±
If the whole page is too light, Toner Save mode may be on. Turn off
Toner Save
mode in the machine menu settings or
Toner Save
mode in the printer
Properties
of the driver. (See
Toner save
on page 22 or
Advanced tab in the Software User’s Guide on the CD-
ROM
.)
±
Clean the scanner window and the corona wire of the drum unit. (See
Cleaning the laser scanner window
on page 120 and
Cleaning the
corona wire
on page 122.)
±
The toner cartridge may be damaged. Put in a new toner cartridge.
(See
Replacing a toner cartridge
on page 126.)
±
The drum unit may be damaged. Put in a new drum unit. (See
Replacing the drum unit
on page 130.)
Toner specks
±
Make sure that you use paper that meets our specifications. Rough-
surfaced paper may cause the problem. (See
Acceptable paper and
other print media
on page 14.)
±
Clean the corona wire and the drum unit. (See
Cleaning the corona
wire
on page 122 and
Cleaning the drum unit
on page 123.)
±
The drum unit may be damaged. Put in a new drum unit. (See
Replacing the drum unit
on page 130.)
±
The fuser unit may be contaminated. Call Brother Customer Service.
All black
±
Clean the corona wire inside the drum unit by sliding the green tab.
Be sure to return the green tab to the home position (
a
). (See
Cleaning the corona wire
on page 122.)
±
The drum unit may be damaged. Put in a new drum unit. (See
Replacing the drum unit
on page 130.)
±
The fuser unit may be contaminated. Call Brother Customer Service.
Examples of poor print
quality
Recommendation
ABCDEFGH
abcdefghijk
ABCD
abcde
01234
CDEF
defg
BC
bcd
23
ABCDEFGH
abcdefghijk
ABCD
abcde
01234