Brother International DCP-1400 Service Manual - Page 37
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The print process unit works with laser beam, electrical charges, and toner. The graph below shows the transition of electrical charge on the surface of the laser-sensitive drum through the four processes: charging, exposing, developing, and transferring processes. 1 Electrical charge on the drum +870 surface (V) A single-cycle of laser-sensitive drum operation CD 0 ® (a) +420(b) +200 0 Charges the drum surface positively. 0 Exposes the drum surface to a laser beam to form a latent image and develops the latent image with toner. (a) Unexposed area (Non-image area) (b) Exposed area (Image area) 0 Transfers the toner-formed image from the drum to paper. Time - III - 7
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 |
The
print
process
unit
works
with
laser
beam,
electrical
charges,
and
toner.
The
graph
below
shows
the
transition
of
electrical
charge
on
the
surface
of
the
laser
-sensitive
drum
through
the
four
processes:
charging,
exposing,
developing,
and
transferring
processes.
1
Electrical
charge
on
+870
the
drum
surface
(V)
+420-
+200
A
single
-cycle
of
laser
-sensitive
drum
operation
CD
0
(a)
(b)
®
0
Charges
the
drum
surface
positively.
0
Exposes
the
drum
surface
to
a
laser
beam
to
form
a
latent
image
and
develops
the
latent
image
with
toner.
(a)
Unexposed
area
(Non
-image
area)
(b)
Exposed
area
(Image
area)
0
Transfers
the
toner
-formed
image
from
the
drum
to
paper.
Time
-
III
-
7