1. Print a Drum Dot
Check Sheet by pressing MENU, PRINT REPORTS, DRUM DOT PRINT
2. Review the Drum
Dot Check Sheet.
dots appear, the issue is resolved.
dots appear on the Printer Settings page, continue to STEP
3. Dots 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.
4. Do the
following to clean the drum unit.
all 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.
Remove the toner cartridge from the drum by holding down the green lock lever on
the left side of the drum unit and lifting the toner out.
Handle the toner cartridge carefully. If toner scatters on hands or clothing,
immediately wipe it off or wash it with cold water.
d. Turn the
drum unit over. Make sure the white drum unit gear(1) is on the left hand
e. Use the
Drum Dot Check Sheet and the numbered markers above the drum roller to determine
the area of the drum roller that requires cleaning:
The Drum Dot Check
Sheet has 6 numbered columns. The number of the column with the printed dot(s)
or mark is used to find the dot or mark position on the drum unit. Confirm the suspected area on the drum by using the
numbered markers above the drum roller to locate the mark on the surface of the
drum. See image below.
The drum is photosensitive so DO NOT touch it with your fingers.
DO NOT clean the surface of the photosensitive drum with a sharp
DO NOT use a scrubbing motion because this might damage the drum.
f. Turn the
white drum unit gear toward you by hand while looking at the surface of
the suspected area.
g. When you
find the mark on the drum surface that matches the drum dot check sheet, wipe
the surface of the drum with a cotton swab moistened with isopropyl alcohol(91%
strength alcohol is preferred, but 70 - 75% strength alcohol is also
acceptable). Allow the alcohol to evaporate or dry off the surface before
continuing further. Be sure to look over the entire drum as there may be
several areas on a drum that need cleaning.
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
NOTE: DO NOT clean the surface of the photosensitive drum
with a sharp object.
Turn the drum unit over. Clean the primary corona wire inside the drum
unit by gently sliding the green tab located the top of the drum unit, from left
to right several times. Return the green tab to the home position before
reinstalling the drum unit assembly.
Reinstall the toner into the drum (be sure it clicks into place). If you put it
in properly, the green lock lever will lift automatically.
Reinstall the drum and toner assembly into the machine and close the front
cover, pressing firmly on each side until the cover clicks into
7. Plug the
power cord back into the machine and then reconnect all other cables and
8. To 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 blank copies of a clean
sheet of white paper inserted into the ADF.
9. Print a
Drum Dot Check Sheet by pressing MENU, PRINT REPORTS, DRUM DOT
PRINT. Press START.
10. Compare the Drum Dot Check Sheet to previous print outs with the dots to see if the
print quality has improved.
a. If the
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.
b. If the print
quality issue continues after multiple cleanings, the drum will need to be
replaced. The part number for the drum is DR720. 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.