Canon PC770 Service Manual - Page 165

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MAINTENANCE AND SERVICING 2. Handling a. Before setting the cartridge to the copier or if white spots appear on the copies as toner runs out, hold the cartridge level as shown in Figure 6-401 and rotate it about 90° in both directions several times to even out the toner inside it. Do not shake the cartridge in ways not instructed, or toner may leak from the developing assembly or the cleaning assembly. d. Do not disassemble the cartridge. e. Do not subject the cartridge to vibration or shocks. In particular, do not press down on the photosensitive drum through the shutter for the photosensitive drum cover. f. Keep the cartridge outside of reach of children. g. The photosensitive drum is susceptible to light, and the cartridge is equipped with a light-blocking shutter. Nevertheless, exposure to strong light for a long period of time can still lead to white spots or black bands". Keep the following in mind: *Caused by residual memory on the drum; may disappear when the cartridge is left alone for some time. Figure 6-401 b. Do not stand the cartridge on its end or upside down. Do not swing it. Caution: 1. Work quickly when removing jams or replacing the cartridge. 2. If you are removing the cartridge for storage or for a color cartridge, be sure to place the removed cartridge in its protective box or cover it. Do not ever leave it unprotected. Reference: If the drum is exposed to light of 1500 lux (general lighting) for 5 min and left alone thereafter in a dark place for 5 min, it is likely to recover to a level that will not cause any practical problems; however, take all measures necessary to avoid exposure. (The direct rays of the sun, in passing, is as strong as 10,000 to 30,000 lux.) Figure 6-402 c. Do not open the shutter for the photosensitive drum cover under the cartridge to touch the photosensitive drum. If you soiled the surface of the photosensitive drum by mistake, clean it with a flannel cloth coated with toner. Do not dry wipe it or use solvent. COPYRIGHT © 1994 CANON INC. CANON PC720174011501770 REV.0 AUG.1994 PRINTER IN JAPAN (IMPRIME AU JAPONI 6 - 3

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MAINTENANCE
AND
SERVICING
2.
Handling
a.
Before
setting
the
cartridge
to
the
copier
or
if
white
spots
appear
on
the
copies
as
toner
runs
out,
hold
the
cartridge
level
as
shown
in
Figure
6-401
and
rotate
it
about
90°
in
both
directions
several
times
to
even
out
the
toner
inside
it.
Do
not
shake
the
cartridge
in
ways
not
instructed,
or
toner
may
leak
from
the
developing
assembly
or
the
cleaning
assembly.
Figure
6-401
b.
Do
not
stand
the
cartridge
on
its
end
or
upside
down.
Do
not
swing
it.
Figure
6-402
c.
Do
not
open
the
shutter
for
the
photo-
sensitive
drum
cover
under
the
cartridge
to
touch
the
photosensitive
drum.
If
you
soiled
the
surface
of
the
photosen-
sitive
drum
by
mistake,
clean
it
with
a
flannel
cloth
coated
with
toner.
Do
not
dry
wipe
it
or
use
solvent.
d.
Do
not
disassemble
the
cartridge.
e.
Do
not
subject
the
cartridge
to
vibration
or
shocks.
In
particular,
do
not
press
down
on
the
photosensitive
drum
through
the
shutter
for
the
photosensi-
tive
drum
cover.
f.
Keep
the
cartridge
outside
of
reach
of
children.
The
photosensitive
drum
is
susceptible
to
light,
and
the
cartridge
is
equipped
with
a
light
-blocking
shutter.
Nevertheless,
exposure
to
strong
light
for
a
long
period
of
time
can
still
lead
to
white
spots
or
black
bands".
Keep
the
following
in
mind:
*Caused
by
residual
memory
on
the
drum;
may
disappear
when
the
cartridge
is
left
alone
for
some
time.
g.
Caution:
1.
Work
quickly
when
removing
jams
or
replacing
the
cartridge.
2.
If
you
are
removing
the
cartridge
for
storage
or
for
a
color
cartridge,
be
sure
to
place
the
removed
car-
tridge
in
its
protective
box
or
cover
it.
Do
not
ever
leave
it
unprotected.
Reference:
If
the
drum
is
exposed
to
light
of
1500
lux
(general
lighting)
for
5
min
and
left
alone
thereafter
in
a
dark
place
for
5
min,
it
is
likely
to
recover
to
a
level
that
will
not
cause
any
practical
problems;
however,
take
all
measures
necessary
to
avoid
exposure.
(The
direct
rays
of
the
sun,
in
passing,
is
as
strong
as
10,000
to
30,000
lux.)
COPYRIGHT
©
1994
CANON
INC.
CANON
PC720174011501770
REV.0
AUG.1994
PRINTER
IN
JAPAN
(IMPRIME
AU
JAPONI
6
-
3