Brother International HL 1850 Service Manual - Page 169

Cleaning, Electrical, Terminals

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HL-1850/1870N SERVICE MANUAL 5) Re-install the drum unit assembly into the printer. Close the front cover. 6) Plug in the power cord, and then turn on the power switch. CAUTION: • Handle the drum unit carefully since it contains toner. If toner scatters and your hands or cloths get dirty, immediately wipe or wash it off with cold water. • Do not touch the scanner window with your fingers. • Do not wipe the scanner window with isopropyl alcohol. 3.4 Cleaning the Electrical Terminals To obtain the best print performance, be sure to clean the electrical terminals inside the printer body. 1) Turn off the power switch and unplug the power cord. 2) Remove the drum unit from the printer. 3) Wipe the electrical terminals as shown in the figure below with a soft dry cloth. Fig. 5-12 5-9

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HL
-1850/1870N
SERVICE
MANUAL
5)
Re
-install
the
drum
unit
assembly
into
the
printer.
Close
the
front
cover.
6)
Plug
in
the
power
cord,
and
then
turn
on
the
power
switch.
CAUTION:
•
Handle
the
drum
unit
carefully
since
it
contains
toner.
If
toner
scatters
and
your
hands
or
cloths
get
dirty,
immediately
wipe
or
wash
it
off
with
cold
water.
•
Do
not
touch
the
scanner
window
with
your
fingers.
•
Do
not
wipe
the
scanner
window
with
isopropyl
alcohol.
3.4
Cleaning
the
Electrical
Terminals
To
obtain
the
best
print
performance,
be
sure
to
clean
the
electrical
terminals
inside
the
printer
body.
1)
Turn
off
the
power
switch
and
unplug
the
power
cord.
2)
Remove
the
drum
unit
from
the
printer.
3)
Wipe
the
electrical
terminals
as
shown
in
the
figure
below
with
a
soft
dry
cloth.
Fig.
5-12
5-9