Take the printed
page with the dots running down the page and measure the distance between the
repeating dots on the page.
dots are spaced every 3 in. (or 75mm) with about 2 – 3 dots down the page, go to
- If the dot pattern
repeats every 2.5 in. (or 63mm) with about 4 – 5 dots down the page, the TONER
cartridge is causing the issue. Go to STEP
are typically caused by foreign material inside the machine (for example, paper
dust, glue from labels or envelopes, paper clips, staples) sticking to or
damaging the surface of the drum. Toner builds up on or sticks to these areas on
the drum and creates black dots on the printed pages.
2. Clean the drum
surface by inserting a blank, clean sheet of white paper in the ADF and make 10
blank, white copies.
- If the smudges or
dots no longer appear after making 10 blank copies, the issue is
- If the smudges or
dots continue with no improvement after making 10 blank copies, go to
- If the smudges or
dots continue after making 10 blank copies but there is an
improvement, make 10 more blank copies to clean the drum further.
- If the smudges and
dots continue after making 20 blank copies, the drum surface may need to
be cleaned manually. Go STEP 3.
Remove, inspect and
clean the drum unit. Typically more than one cleaning is required to fully
remove material stuck to the drum surface. Items required for cleaning the
Alcohol Swab, such
as a medical alcohol pad or wipe, which can be found at a local retail pharmacy
or first aid kit.
Lint free cloth
lightly moistened with isopropyl (rubbing) alcohol.
precaution please note: Isopropyl alcohol is flammable and should be kept away from
fire or flame. As stated, this cleaning process typically has to be
repeated several times to remove certain kinds of foreign material from the drum
cables and cords and then unplug the power cord from the machine.
the front cover of the machine. Then, lift the drum unit up and pull
it out of the machine.
Be sure to place the drum unit on a clean, flat surface on top of a piece of
disposable paper to avoid spilling and scattering toner. If you get toner
on your hands or clothes, immediately wash it off with cold water.
down the blue lock lever and take the toner cartridge out of the drum unit.
your print sample and put it in front of the drum (see image below) to find the
area of the drum that may be causing the dots.
the drum unit gear toward you by hand and look for any marks or material on the
drum surface (1). Turning the drum gear will ensure you inspect the entire
The drum is photosensitive and should not be touched directly by your fingers or
hand as it will apply body oils to the drum surface.
a. When you find the
area on the drum that matches the print sample, gently wipe the surface of the
drum with the alcohol swab or lint free cloth lightly moistened with isopropyl
NOTE: DO NOT clean the surface of the drum with any sharp
continuing further, allow the alcohol to evaporate or dry off the drum
surface. In some cases there may be several areas on a drum that need
order to inspect the entire drum surface, turn the drum gear towards you.
Make sure you completely rotate the drum to fully inspect the entire
you are done cleaning the drum, put 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.
the drum unit and toner cartridge assembly back in the machine. Close the
the power cord back into the machine and then reconnect all other cables and
further clean the drum and remove any materials that may not have been
completely wiped away when the drum surface was manually cleaned, make 10 more
blank copies of a clean sheet of white paper inserted into the ADF.
the Help List again by pressing the REPORTS key and then 2 on the
dial pad. Compare it to the
previous print sample in order to see if the print quality has
issue is the same or the quality has improved, but the issue is still visible,
you will need to repeat the cleaning process. Performing multiple
cleanings has been very successful.
print quality issue continues after multiple cleanings, the drum will need to be
replaced. The part number for the drum is DR350. If you find that
your retailer does not carry the specific supplies and accessories you are
looking to locate, you can purchase them by calling our toll free Accessory Line
on 1-877-552-MALL (6255) or shop on-line at our website at http://www.brothermall.com.
dot pattern repeats every 2.5 in. (or 63mm) with about 4 – 5 dots down the page,
the toner cartridge will need to be replaced. To replace the toner follow
the steps in the link below: