Canon CLC1000 User manual

COLOR LASER
COPIER 1000
SERVICE
MANUAL
REVISION 1 MAY 1997
Canon
FY8-13E3-010
COPYRIGHT 1997 CANON INC.
CANON CLC 1000 REV. 1 MAY 1997 PRINTED IN JAPAN

1. GENERAL DESCRIPTION -
I.
FEATURES
1.
Turns out as many as 30 copies per minute (both full-color and black-and white).
The newly developed mechanism of four photosensitive drums processes 30 copies every minute.
2. SOOO-sheet large capacity paper source.
The addition of two cassettes (holding 500 sheets each) and a paper deck (4000 sheets) offers a
source ready to supply 5000 sheets of paper.
3.
Automatic duplexing mechanism.
The built-in duplexing unit enables automatic copying on both sides of sheets.
4. Paper of up to 209 g.
Postcards and other materials of heavy stock may be used for copying.
5. Various creative functions.
In addition to such basic creative functions as editing of hue and brightness, installation of the ED
Board Al provides such complex creative functions as framing, gradation, and freehand.
6.
Full line-up of options.
A large number of options are designed for the CLClOOO, including the Preview Monitor, PDF, and
IPU-II.
COPYRIGHT 0 1997 CANON INC. CANON
CLClOOO REV.1 MAY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON)
1-l

1. GENERAL DESCRIPTION -
External delivery roller
Internal delivery roller
No. 2 mirror mount
Upper fixing web
Scanning lamp
Upper fixing roller
Oil applying roller
Lower fixing roller
Pre-fixing feeding assembly
Pre-separation/fixing charging assembly
Image position correction CCD unit
Lens
Bk BD sensor
CCD
Bk image position correction mirror
Bk No. 3 mirror
C image position correction mirror
C BD mirror
C No. 3 mirror
Internal static eliminating roller
Polygon mirror/monitor
M No. 3 mirror
M BD sensor
M image position correction mirror
Y No. 3 mirror
Y image position correction mirror
Y BD mirror
Registration roller
Thick paper detection roller
Multifeeder feeding roller
Multifeeder pick-up roller
Multifeeder tray
Delivery vertical path roller
Duplexing reversal inlet roller
Lower fixing roller web
Duplexing reversal feeding roller
Duplexing reversal outlet roller
Waste toner box
Pre-duplexing feeding assembly
Transfer belt
Transfer cleaning blade
Transfer belt cleaning web
Cassette 2
Duplexing unit
Polishing roller
Oil removing roller
Cassette 1
Pick-up roller
Feeding roller
Separation roller
Pick-up vertical path roller
Paper deck separation roller
Paper deck feeding roller
Paper deck pick-up roller
Pre-exposure lamp
Pre-primary charging assembly
Photosensitive drum cleaner
SALT sensor
Primary charging assembly
Potential sensor
Developing assembly
Photosensitive drum
Transfer charging assembly
COPYRIGHT 0 1997 CANON INC.
CANON CLClLlOO REVlMAY1997 PRlNTEOINJAPAN(IhlPRIhlEAUJAPON)
l-13

- 1. GENERAL DESCRIPTION
C. Control Panel
Figure l-404
Key
@ Extended Copying Mode
keys
@ Message display
Description
Press the appropriate key to
select a specific copying mode.
Indicates the selected copying
mode or provides instructions.
Remarks
@ Reset key
Press it to cancel the selected
copying mode, thereby returning
to standard mode.
@I Stop key
Press it to stop continuous
copying.
@ Pre-Heat key
Press it to start pre-heating
mode or to stop it.
@ Interrupt key
Press it to suspend on-going
copying and to make a copy.
0 Start key
8 Clear key
Press it to start copying.
Press it to change the copy
count or settings.
@ ID key
@ Call key
Press it to start ID mode.
Press it to recall up to three
previous copying modes. A press on the key starts ID
mode, rejecting subsequent
copying commands without
input of an ID.
@I Pilot lamp
Glows green when power is
turned on.
Table l-401
1-14 COPYRIGHT
Q 1997 CANON INC. CANON CLClOOO REV.1 MAY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON)

instructions to the User
1.
2.
When making two-sided copies in manual
mode, it is important to correct the curling on
the leading edge by reversing the direction of
the curl.
The transfer medium may be any of the fol-
lowing five types:
Plain paper: regular copy paper (80 to
105 g/m2)
Thin paper: paper thinner than plain
paper (64 to 79 g/m2)
Thick paper:
paper thicker than plain
paper (106 to 163 g/m2)
Extra thick paper: thicker than thick paper
(164 to 209 g/m2)
Transparency: transparency film
Special paper 1: Paper identified as such on
package
Special paper 2: Paper identified as such on
package
3.
Points to Note about Transparencies
Avoid contact with the’ copying side, by
holding at the edge.
Fan out each stack before setting it in a
cassette or the multifeeder.
Remove from the tray immediately after
copying to avoid jamming.
Keep unused transparencies in a box, and
store them avoiding high temperature and
humidity.
4.
n
Points to Note about the Orientation of
Transparencies
lOrient each transparency so that it is fed in
the correct direction.
When Placing in a Cassette,
lIf vertical, orient it so that the white triangle
at the corner is front left 0.
lIf horizontal, orient it so that the white trian-
gle at the corner is front right 0.
Figure l-405
1. GENERAL DESCRIPTJON -
nPlacing on the Manual Feed Tray
lIf vertical, orient it so that the white triangle
is front right 0.
lIf horizontal, orient it so that the white trian-
gle is front left 0.
I
I
Figure l-406
5. Cassette Sheet
In a high humidity environment, paper is like-
ly to become moist and will adversely affect
copying operation. If such is the case, advise
the user to place the cassette sheet on the
bottom of the cassette tray.
COPYRIGHT 0 1997 CANON INC. CANON
CLClOOO REV.1 MAY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON)
l-15

I. IMAGE FORMATION
A. Outline
I
Original exposure block
-\I-...
Lens&CD
Laser unit
Fixina
ass
Separation
( _ flG=__, Pre-f’ axing
t-l.._ II..:_ _
chargiqc
rancfor halt dnzaninn umh
w
Transfer belt
6
-I
8=
I
Pre-duplexing
feeding
.
casse-
Cassew'
1 Transfer blade
\
Transfer belt
Figure 2-101
deck
COPYRIGHT 4 lM7 CANON INC.
CANON CCC1000 REV.1 MAY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON)
2-l

- 2. COPYING PROCESS
For each process color, the CLClOOO uses
one set of components; i.e., photosensitive drum,
developing assembly, cleaning unit. (In other
words, four sets are used for full color reproduc-
tion.)
The CLClOOO’s photosensitive drum consists
of a photo-conductive layer on the other side
(OPC) and a conductive aluminum substrate on
the inside.
The CLClOOO differs from black-and-white
copiers for the following:
Light is shined on a color original, and the
reflected light is separated by filters into the three
primary colors of light for conversion by a CCD.
Using analog video signals (RGB) from the
CCD, video signals are generated for each
process color (YMCK) to drive a semiconductor
laser.
A laser beam is directed to the appropriate
photosensitive drum to develop the image repre-
senting the corresponding process color (of toner;
complementary to the corresponding filter) for
transfer to copy paper; the step is executed alike
for Y, M, C, and K.
The resulting image is fixed to the paper, pro-
ducing a color copy of the original.
The CLCl 000 uses four photosensitive drums
for transfer of images to copy paper, and a trans-
fer belt is used to ensure that copy paper is
moved horizontally under each photosensitive
drum for transfer
The image formation block consists of the fol-
lowing eight steps:
Step 1 Pre-exposure
Step 2 Primary charging
Step 3 Laser exposure
Step 4 Development
Step 5 Retention/transfer
Step 6 Separation
Step 7 Fixing
Step 8 Photosensitive drum cleaning
Auxiliary processes include pre-primary charg-
ing, pre-fixing charging, and transfer belt clean-
ing/static elimination.
(___________________________..____
; Static Latent Image Formation Block
/
7
8. Drum cleaning
Figure 2-102
2-2
COPYRIGHT 0 1997 CANON INC. CANON CLClOOO REV.1 MAY 1997 PRINTED IN JAPAN (IMPRIME AU
JAPON)

2. COPYING PROCESS -
B. Static Latent Image
Formation Block
This block consists of three steps and ulti-
mately leaves negative charges in the areas of
the photosensitive drum representing the white
(light) areas of the original, while neutralizing the
charges in the areas representing the black (dark)
areas of the original.
Such an image created on the photosensitive
drum using differences in potential is not visible to
the human eye and is called a static latent image.
Time (t) -
c-_..
I
_-____ “L
I’ \
Light area
:’ (exposed to laser)
8’
Dark area
(white on original)
,
\
Pre-exposure Primary charging Image expose
(step 1)
(step 2)
(step 3)
Figure 2-103
C. Pre-Exposure (step 1)
Photosensitive
Figure 2-l 04
In preparation for primary charging, the light
from the pre-exposure lamp is directed to the sur-
face of the photosensitive drum to remove resid-
ual charges, thereby preventing uneven copy den-
sity.
COPYRlGHTQ1997 CANONINC. CANONCLClOOOREV.1MAY1997
PRlNTEOINJAPAN(lMPRlME AUJAPON)
2-3

- 2. COPYING PROCESS
D. Primary Charging (step 2)
Figure 2-105
The negative corona of the primary charging
assembly charges the surface of the photosensi-
tive drum to a uniform negative potential, estab-
lishing primary potential.
Since the surface potential of the charged pho-
tosensitive drum is determined by the potential of
the grid, a bias is applied to the grid to ensure a
specific drum surface potential.
E. Laser
Exposure (step
3)
Laser beam
Dark area Light area
- - -
Figure 2-l 06
A laser beam of an intensity suited to the
image density of the original is directed to the sur-
face of the photosensitive drum, thereby neutral-
izing the charges on the surface. Such areas are
called the light areas of the photosensitive drum
and will later attract toner in step 4 (development).
2-4
COPYRIGHT 8 1997 CANON INC. CANON
CLClOOO REV.1 MAY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON)

2. COPYING PROCESS -
F. Development (step 4)
/
Y Blade
/
/
Blade
Stray-toner collecting electrode
Figure 2-107
The process in which the latent static image on
the surface of the photosensitive drum is turned
into a visible image is called development.
Since the CL0000 is designed so that the
areas on the surface of the photosensitive drum
exposed to a laser beam will attract toner, the
toner is charged to a negative potential (the same
potential as in primary charging).
As shown in Figure 2-107, the developing
assembly consists of a developing cylinder and a
magnetic blade. The developing cylinder in turn
consists of a fixed magnet and a cylinder which
rotates around the magnet.
The developer is composed of toner (mainly
resins and dye) and carrier (iron powder) mixed at
a specific ratio. The toner and the carrier are
charged to a negative and a positive potential,
respectively, by friction against the rotating cylin-
der.
The developer is held in the form of a brush
over the surface of the cylinder within the mag-
netic field of the fixed magnet, and is deposited in
a uniform layer by a blade.
Figure 2-l 08
Double blanking pulses and a DC bias (nega-
tive component) are applied to the developing
cylinder to improve development efficiency and
reproduction of highlighted areas, resulting in a
developing bias with a larger negative than posi-
tive component.
During copying, toner is attracted to the light
areas of the photosensitive drum because of the
drum surface potential and the negative potential
of the developing bias, turning the latent static
image into a visible image. Excess toner is then
repelled by the photosensitive drum because of
the drum surface potential and the positive com-
ponent of the developing bias.
The electrode plate under the developing
cylinder is supplied with a high voltage (positive)
to attract stray toner, thereby preventing soiling of
the inside of the machine.
COPYRIGHT Q 1997 CANON INC. CANON
CLClOOO REV.1 MAY 1997 PRINTED IN JAPAN (IMPAIME AU JAPON) 2-5