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I
MECHANICAL SYSTEM
I
11)
Push
the pressure spring
of
the lower
fix-
ing
roller
using
a
screwdriver,
and
detach
the
upper
fixing
roller.
©
Screwdriver
(D Lower
roller
Figure 4-90
1
2)
Detach
the
lower
fixing
roller.
4.
Attaching the Heater
and Upper
Fixing Roller
Attach the heater
and
the
upper
fixing
roller
as
in
detaching
them
but
in
reverse
order while noting the
following:
a.
Heater
i.
Do
not
touch
the surface
of
the
heater,
ii.
Make
sure
that
the
end
bearing the
man-
ufacturer's
name
is
to
the
front.
b.
Upper
Fixing Roller
i.
Wrap
the
roller
with
copy paper
to pre-
vent
soiling
or scarring
the surface
of
the
roller.
ii.
Make
sure
that
the
end
with
two
C-rings
is
to
the
rear.
iii.
Make
sure
that
the
two
identical
gears
are
used
at
the
front.
5.
Adjusting the Nip
Width
(tightening
the
pressure
adjusting
nut)
If
the nip width
is
not
as
shown
in
Figure
4-91
,
turn
the
bolt to
adjust
it.
Feed
direction
c
A3
size-
b
Center
of
copy
Figure
4-91
Note:
the
each
end.
Dimension
Measure
after
the
upper and
lower
rollers
have
heated
up.
b
4.0±0.5mm
|a-c|
0.5mm
or less
Table
4-1
a.
Measuring
the Nip
Width
If
the
roller
is
not heated, wait
for
15
min-
utes
after
the
WAIT
indicator
has
changed
to
green;
then,
make
20
copies before
tak-
ing
measurements.
b.
Taking
Measurements
1
)
Lift
the
copyboard
cover,
and
make
an
A3
copy
of
a
solid
black
document..
2)
Switch the
copier
OFF
as
soon
as
the
leading
edge
of
the
copy
comes
out
of
the
copier,
and open
the
front
door
and
the
delivery
assembly.
COPYRIGHT©
1992
CANON
INC.
CANON
NP-1550REV.1 SEPT.1992
PRINTED
IN
JAPAN (IMPRIHEAUJAPON)
4-29
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