Brother International FAX 275 Service Manual - Page 14
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2.1.2 Scanner The scanner uses a contact image sensor (CIS) unit which consists of an LED array illuminating documents, a self-focus lens array collecting the reflected light, a CIS PCB carrying out photoelectric conversion to output picture element data, and a cover glass on which a document advances. When the document passes between the white pressure roller and the cover glass, it is scanned.
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2.1.2
Scanner
The
scanner
uses
a
contact
image
sensor
(CIS)
unit
which
consists
of
an
LED
array
illumi-
nating
documents,
a
self
-focus
lens
array
collecting
the
reflected
light,
a
CIS
PCB
carrying
out
photoelectric
conversion
to
output
picture
element
data,
and
a
cover
glass
on
which
a
document
advances.
When
the
document
passes
between
the
white
pressure
roller
and
the
cover
glass,
it
is
scanned.