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OPERATIONS
and
timing
I
D.
Adjustment
1.
Image
leading
edge
non-
reproduced
area
There
is
a
white
strip
on
the
bottom
of
the
copyboard
glass
in
the
position
shown
in
the
figure
below.
If
bias
is
being
applied
to
the
grid of
the primary
corona
while the
scanner
is
passing the white
strip,
the leading
edge
of
the
copy
will
be reproduced
blank.
If
the
leading
edge
non-image
width
is
outside the
standards,
adjust
the timing
at
which
the
grid
bias
goes
from
OFF
to
ON
in
the service
mode
(C3
).
,
White
strip
-t— Approx.
10mm
Figure 3-46
The
standard
image
leading
edge
non-
reproduced area on a
DIRECT
copy
of
a
test
sheet
is
2.0
±1.5 mm.
2.0
+
1.5mm
Figure 3-47
A
higher
setting
(
C3
)
increases
the
leading
edge non-image
width;
in
units
of
0.25
mm.
COPYRIGHT©
1992
CANON
INC.
CANON
NP-1550
REV.1
SEPT.
1
992
PBINTEO
IN
JAPAN
(IMPH1HE
AU
JAPOM)
3-45
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