Canon NP-1215 User manual

NP-1215
SERVICE
REVISIONO MAR. 1988
Canon
FY8-1377-000
COPYRIGHT 1988 CANON INC.
CANON NP-1215 REV.0 MAR. 1988 PRINTED IN JAPAN

ees
—
I. FEATURES
1. Originals and copy papers up to A3, and fixed copyboard
e Compact design with the reduction feature of A3 to A4.
e Fixed copyboard which facilitates making copies from thick originals such as books.
2.50 to 200% wide range zoom ;
e Zoom copies from 50 to 200% in increments of 1%.
e@ Automatic supply of correct size copy paper when using the optional DF/ADF device.
3.Space-saving front loading system in replenishing copy papers
e Employment of front-loading system for ease in replenishing copy papers.
4. High quality image with extra-fine particle-size mono-component toners
e For ever superior image quality, extra-fine particle-size (in comparison with previous
Canon toners) toner has been employed in association with mono-component “jump-
ing” toner development system.
COPYRIGHT © 1968 CANON INC. . CANON HP-1215 REV.0 MAR. 1988 PRINTED IN JAPAN (IMPRIME AU JAPON) 11

SPECIFICATIONS
Type
Copier
Copyboard
Light source
Lens
Photosensitive material: :
Method
Copying
Charging
Exposure
Copy density adjustment
Developing
Paper pick-up
Automatic
Manual
Transfer
Separation
Cleaning
Fixing
Type of original
Maximum document size
Function
DIRECT
REDUCTION |
REDUCTION Il
REDUCTION III
REDUCTION IV
ENLARGEMENT |
ENLARGEMENT Hi
STEPLESS
WAIT time
First copy
Continuous copying
Copy size
Kind of copy paper
Cassette feed
Manual feed
Two-sided copies
Manual feed
Overlay copies
Manual feed
Cassette specifications Claw
General
Universal
Tray capacity
COPYRIGHT © 1986 CANON INC.
Desktop 4.
Fixed. : 1
Tungsten- halogen lamp (300 W) ; =
Lens Do
OPC’
indirect electrostatic method
Corona
Slit (moving light source)
Automatic or manual -
Dry
Dedicated cassette
Manual feed
Corona
Tangential Curvature separation
Blade
Heated roller (QOOW)
Sheets, books, 3-dimensional objects (up to 2 kg) =
A3 (11" x 17”) s
Reproduction ratio
Vv
0 115V 220/240V
1:1 (£0.5%) 1:1 (40.5%) 1:1 (£0.5%)
1:0.500 1:0.647 1:0.500
1:0.707 1:0.730 1:0.707
1:0.815 1:0.785 =
1:0.866 =
1:1.414 1:1.214 1:1.414
1:2.000 1:1.294 1:2.000
1:0.500 ~ 1:0.500 ~ 1:0.500 ~
2.000 2.000 2.000
90 seconds (20°C)
10 seconds (A4)
99 copies
Max: A3: (11” x 17”) Min: A6 (Post Card)
Ordinary paper 64 to 80g/m?, tracing paper (SM1,
*GNT-80}, colored paper camara
Ordinary paper 64 to 128g/m?, tracing paper (SM1, |
*GNT-80), colored paper, OHP film, postcards, labels
Ordinary paper 64 to 80g/m?
Ordinary paper 64 to 128g/m?, postcards, colored
paper
Ordinary paper 64 to 80g/m?
Ordinary paper 64 to 128g/m*, postcards, colored
paper
Provided
Depth 27mm (1.0”) (equivalent to approx. 250
sheets of 80g/m? paper)
Not provided
Approx. 100 sheets (A4 size, 80g/m/?)
CANON NP-1215 REV.0 MAR, 1960 PRINTED 'IN JAPAN (IMPRIME AU JAPON)

a
aoe
COPYRIGHT © 1988 CANON INC.
Function |
Non-image width (1st side)
Leading edge
Left and right
' AUTO CLEAR
AUTO SHUT-OFF
Options
’ Operating environment -
Temperature range
Humidity range
Atmospheric pressure range
Power source
115V 60Hz:
220V 50Hz
240V 50Hz
240V 50Hz
220V 50Hz
Power consumption
Max .
During STANDBY
During continuous copying —
Noise
During copying
During STANDBY
Ozone (average for 8 hours)
Dimensions
Width
Depth
Height
Weight
Storing consumables
Copy paper
Toner
Developing unit
2.0+ 1.0mm (0.08"0.03") max
2.5+ 1.5mm (0.1”"+0.03") max
poee (standard 2 minutes)
DEVADF, CT unit, Sorter, Control card unit
7.5 ~ 32.5°C
10 ~ 85%
0.6 to 1 atmospheres
Copier No.
CMY xxxxx
DMY xxxxx
EMY xxxxx
FMY xxxxx
DMZ xxxxx
1.5kw max
55dB max (at 1m from copier)
40dB max (at 1m from copier)
0.1ppm max
610mm (24”).
574mm (22’)
344mm (13")
47kg |
Store copy paper in its wrapping and protect it from
humidity
Store toner at a temperature and humidity of no more
than 40° and 85%, and away from direct sunlight
Store the developing i in a storage box or in the pedestal
of the copier at a temperature and humidity of no more
than 30°C and 85%, and away from direct sunlight
CANON NP-1215 REV.0 MAR, 1968 PRINTED IN JAPAN (JMPRIME AU JAPON)

Reproduction ratio Size Cassette (Number of cop-
‘ : ies per minute
DIRECT A3 (297 X 420 mm) (11" x 16”) A3 9
A4 (210 x 297 mm) (8.3" x 11.7”) A4 15
B4 (257 X 364 mm) (10.1" x 14.3”) BA 10
BB (182 xX 257 mm) (7.2” x 10.1”) B5' 15
LTR (216 X 279 mm) (8.5” X 11”) 15
STMT (139.5 xX 216 mm)
(5.4" x 8.5")
LGL (216 < 356 mm) (@. 5” x’ 74") LGL
11” x 17” ones 11” x 17
| (11" x 17’)
REDUCTION
ENLARGEMENT
LTR — 11” X 17” 11” « 17"
LGL— 11” x 17” 11” x 17”!
200% . =
| The above specifications are subject to.
| change with improvement or redesign
of the copier. .
1-4 COPYRIGHT © 1986 CANON IHC. ; CARON HP-1215 REV.0 MAR. 1988 PRINTED IN JAPAN (IMPRIME AU JAPON)

Ill. NAMES OF PARTS
A. External View
@ Copy delivery tray ® Cassette
@ Copyboard cover ©) Copyboard glass
@) Power switch 10 @ Control panel
@ Copy delivery cover
Figure 1-1
@®
Fixing
roller
knob
@
Developing
unit
release
lever
@ Cartridge
©)
Manual
feed
tray
@
Feeder
release
lever
Figure 1-2
COPYRIGHT © 1988 CANON INC. CARON NP-1215 REV.0 MAR. 1988 PRINTED IN JAPAN {IMPRIME AU JAPON}

B. Cross-sectional View
QO OH © ©® ©
® @ @ Oe ®
Preconditioning exposure
g Mirror 3 Registration rollers
Mirror 2 lamp (6 Transfer corona unit
@) Mirror 1 @ Primary corona unit @ Photosensitive drum
| @ Scanning lamp Mirror 6 ' s Cassette
6) Copyboard glass @) Mirror 5 Feeder
©) Copyboard cover @ Mirror 4 . @) Fixing unit
| @ Lens @ Manual feed tray @i) Copy delivery roller oe
Pick-up roller @2 Exhaust fan :
Figure 1-3
1-6 we COPYRIGHT © 1888 CANON INC. Poy CAHON HP-1215 REV.0 MAR. 1988 PRINTED IN JAPAN (IMPRIME AU JAPON)

gS
IV. OPERATION
A. CONTROL PANEL
220/240V.
Figure 1-4
(1) SORT/GROUP key .,
' This: key is used to select the SORT,
GROUP, or NON-SORT mode. _~
When the indicator is not lit, the copier
is in the NON-SORT mode.
SORT indication
eAQUE indication ads
Note:
“SORT” gives a true * “collate” function;
“GROUP” gives a true “sort” function.
(2) TWO-PAGE SEPARATION key - -
This key is used to select the TWO-
..PAGE SEPARATION made:
(3) AE key (automatic density. ae
select key)
) FIXED REDUCTION RATIO: keys
) DIRECT key
) FIXED ENLARGEMENT RATIO keys
) eds REPRODUCTION RATIO SELECT
ey
This key is used to enter the AUTO
REPRODUCTION RATIO SELECT mode.
It can. be used when a DF ‘or ADF
(Document Feeder/Automatic Docu-
ment Feeder) is installed on the copier.
(8) ZOOM key
This key is used to select any reproduc-
tion ratio between 50 and 200% (in
1% steps).
COPYRIGHT © 1986 CANON IHC.
(9) % key
This key is used to cause the COPY
NUMBER indicator to show the repro-
_ duction ratio that has been selected.
Two seconds after it is breneds the
indication will go .OFF.:
(10) COPY START key
@ Copying cannot take place when
_ the key is lighting red. —
@ Copying can take place when the
key is glowing green.
1) Number keys , ee
2) PREHEAT key |
3) Power switch
4) POWER indicator
ON when the POWER switch is ON.
5) CLEAR/STOP key
6) STANDARD MODE key
This key is used to return the copier to
the STANDARD mode. :
Standard mode: COPY NUMBER indi-
cator “1”
DIRECT
AE
a aed NUMBER indicator 2
Shows the number of copies to be
made (decremented with each .
copy).
@ Indicates the reproduction ratio
. (%) when the % key is pressed.
(1
(1
(1
(1
(1
(1
CANON NP-1215 AEV.0 MAR, 1988 PAINTED IN JAPAN (IMPRIME AU JAPON) 1-7

(18) FIXED REPRODUCTION RATIO
indicator
(19) COPY DENSITY cursor
(20) TONER OUT indicator
(21) PAPER OUT indicator
(22) COPY DENSITY RECALIBRATION knob
This knob is used to adjust the copy
density system when copies are too
. dark or too faint for a given cursor
setting.
(Turning it clockwise will cause the
density to become fainter.)
(23) Control card checking indicator
(24) Paper feed position indicator
(25) JAM indicator
B. Basic Copying Operation
1) Set the power switch to ON (l).
(1) If the temperature of the fixing roller
is too low for copying, the indicator
of the COPY START key will glow red.
(2) When the temperature of the fixing
roller becomes high enough for copy-
ing, the indicator will glow green.
(3) The: normal waiting time at room
temperature (20°C) is about 70
seconds.
2) Raise the copyboard cover, place an
original on the copyboard with the side
to be copied facing downward, and
align it with the size indication.
3) Select the desired reproduction ratio by
pressing a FIXED REPRODUCTION RA-
TIO SELECT (DIRECT, REDUCTION, or
ENLARGEMENT) or ZOOM key.
4) To adjust the copy density manually,
the A key indicator should be OFF; press
the key once if it is ON. Set the COPY
DENSITY cursor to suit the original.
5) Check the size of paper in the cassette.
(1) If the cassette does not have the
desired size of paper, remove it and
install a cassette with the desired
size.
6) Set the required number of copies (1 to
99) using the number keys and confirm
that the correct number appears on the
COPY NUMBER indicator. —
(1) !f an error was made in inputting the
number of copies, press the
CLEAR/STOP key and reset the num-
ber of copies.
7) Press the COPY START key.
(1) To stop a'continuous copying opera-
tion, press the CLEAR/STOP key. The
copier will complete the copy in prog-
ress, then stop.
The COPY NUMBER indicator will
display the initially set copy quantity.
(2) It is possible to switch from auto-
matic exposure control to manual
density adjustment at any time from
the start of copying to the completion
of the final copy. However, it is not
possible to switch in the other direc-
tion from manual density adjustment
1-8 COPYRIGHT © 1988 CANON INC,
to automatic.
Example:
\f the copy is too dark or too faint using AE,
cancel AE and vary the copy density with
the COPY DENSITY cursor.
(3) If the PAPER OUT indicator goes ON
during copying, the copier will stop.
Refill the cassette and press the
COPY START key. The remaining
number of copies will be made
automatically.
(4) If the copier has a DF, place a docu-
‘ment (original) on the document tray.
The document will be fed automati-
cally and copying will start.
If no other operation is performed,
the copier will return to the STAN-
‘DARD mode approximately 2 min-
utes after it completes a copy or after
the last key operation.
C. MANUAL FEED PICK-UP OPERATION
1) Place an original on the copyboard.
2) Set the desired reproduction ratio.
3) Select manual or AE density control.
4) Feed one sheet of copy paper into the
copier along the guides of the manual
' feed tray.
-(1) When the copier senses the paper,
copying will start automatically.
(2) When performing continuous man-
ual feed copying, keep the sheets at
least 50 mm separate from each
other.
(5
—
Note:
Manual feed copying is possible when the
PAPER OUT indicator is ON and the COPY
START key is glowing red.
D. TWO-SIDED COPYING
Copy one side of a 2-sided original.
Invert the original so that the same edge
faces the front. Invert the copy in the same
way (front edge facing fromt ward) and feed
it into the copier.
(1) Use dry, uncurled paper.
(2) Use paper in the weight range 60
128g/m?.
(3) When making two-sided copies, only
one image can be made on each side of
the copy paper.
(4) Overlay and two-sided copies cannot be
made on the same sheet of copy paper.
Front edge _
Figure 1-5
- CANON 'NP-1215 REV.0 MAR. 1968 PRINTED IN JAPAN {IMPRIME AU JAPON)

a
E. OVERLAY COPY OPERATION
By changing the developing unit, a 2-
color copy can be made on the same side
of the copy paper.
(1) Use paper in: the range of 60 to
128g/m?.
(2) When making an overlay copy a maxi-
mum of two images can be made on one
side of the copy paper.
(3) Overlay and two-sided copies cannot be
made on the same sheet of copy Peber:
F, REPLACING THE CT UNIT
1) Open the front door.
2) Swing the developing unit nelese. lever
counterclockwise.
3) Pull the developing unit forward.
4) Grasp the handle of the developing unit,
and gently raise it.:
Figure 1-6
6) Place the CT unit gently on the develop-
ing unit guide rails and push it into the
copier.
7) Swing the developing unit release lever
clockwise.
8) Close the front door.
Note:
1. Donot tilt or handle the developing unit
or the CT unit roughly.
2. Do not place the developing unit or the
CT unit on the floor. Be sure to place
. them in their storage box or tin the
pedestal of the copier. a
COPYRIGHT © 1988 CANON INC;
CANON NP-1215 REV.O MAR. 1988 PRINTED IN JAPAN (IMPRIME AU JAPOR}
V. WARNING INDICATOR AND RE-
QUIRED ACTION
A. JAM INDICATOR 8/y
If an area of this indicator flashes while
copying is taking place, it is likely that the
paper has jammed at the position repre-
sented by the part that is yee: Check
and take action as follows. '
pak in OF unit document indicator
Lef- Copier paper JAM indicator
Manual feed TRAY OPEN indicator
Sorter JAM indicator
When clearing a paper jam which ahs
occurred in an option unit (sorter or DF),
refer to the Service Manual for the option
unit.
1. DF unit document JAM indicator
2. Copier paper JAM indicator —
3. Manual feed TRAY OPEN indicator
4. Sorter JAM indicator
If paper jams inside the copier, check
the paper pick-up area; separation feeder
area, fixing/copy delivery area, and car-
tridge area, and remove all jammed paper.
1) Open the front door. i
2) Remove the copies from the copy tray.
3) Operate the release and open the copy
delivery unit.
4) Check if there is copy paper jammed in
the fixing unit. If there is paper jammed
in it, turn the knob of the fixing rollers
clockwise to remove the jammed paper.
Figure 1-7
5) Close the copy delivery unit.
6) Check if there is paper jammed in the
separation/feeder area. !f there is,
swing the feeder release lever counter-
clockwise to open the feeder, then
remove the jammed paper. Be careful
not to tear it.

Note:
When removing jammed paper from the
separation area be very careful not to touch
the photosensitive drum.
Figure 1-8
7) Open thé manual feed tray, and check
if there is any jammed copy paper.
If there is any jammed copy paper,
remove it. °
Figure 1-9
8)
Open
the
manual
feed
tray
and
check
if
there
is
any
jammed
copy
paper.
If
any
copy
paper
is
protruding
from
the
cassette,
remove
it.
9) Close the front door.
1-10 COPYRIGHT © 1988 CANON INC.
B. PAPER OUT indicator
This indicator lights.if there is no cas-
sette in the cassette holder or if there is no
paper in the cassette.
1) Remove the cassette. -
2) Place copy paper into the cassette.
3) Put the cassette into the copier.
C. TONER OUT INDICATOR (2
This indicator flashes when the amount of
toner in the black developing unit has
become low.
1. Black developing unit °
1) Open the front door.
2) Turn the developing unit release lever
counterclockwise.
3) Pull the developing unit forward as far
’ as possible.
4) Open the top cover of the developing
unit.
5) Shake the toner cartridge back and
forth vigorously about 10 times.
6) Place the toner cartridge on the devel-
oping unit.
7) While holding the toner cartridge in
place, remove the seal slowly to allow
the toner to flow out.
Figure 1-10
8) Strike the top of the toner cartridge to
remove any toner remaining in the
. cartridge.
9) Carefully remove the toner cartridge.
10) Close the top cover of the developing
unit.
11) Put the developing unit back into the
copier.
12) Swing the developing unit release lever
clockwise.
13) Close the front door.
2. CT Unit (color developing unit)
If copy images become faint, the color
toner has probably run out. In this case,
replace the CT unit. The copy image can
sometimes be temporarily restored by plac-
ing the CT unit in its storage box and
agitating it.
CANON NP-1215 REV.0 MAR. 1988 PRINTED IN JAPAN (HMIPRIME AU JAPOR)

iS ame
Note:
The CT unit is a discardable type. When the
color toner has been used up, toner is not
added to the CT unit; rather, the entire unit
is replaced.
D. CONTROL CARD INDICATOR
The control card indicator operates on
a copier with a control card unit. It flashes
in the following cases.
(1) When there is no control card in the
control card unit.
(2) When there is a control card in the
control card unit but the indication on
the control card unit is “P” or “EE”
COPYRIGHT © 1988 CANON INC.
CANON NP-215 REV.O MAR. 1986 PRINTED IN JAPAN (IMPRIME AU JAPON)
Vi. DAILY INSPECTION TO BE
PERFORMED BY THE
CUSTOMER
Carefully instruct the customer to be
sure to clean the following parts of the
copier once a week.
1) Primary corona unit
Push and pull the wire cleaner to clean
the corona wires.
2) Copyboard glass
Clean the copyboard glass with a damp
cloth, then wipe it dry.
3) Copyboard cover
Clean the copyboard cover with a mild
detergent solution, then wipe it dry.
4) Transfer corona
Remove the transfer corona unit from
the copier, then slide the knob (wire
cleaner) at the bottom of the transfer
corona unit back and forth to clean the
corona wires.
1-11

LOOX
|. IMAGE FORMATION PROCESS
A. OUTLINE
Copyboard glass
a | mm | mmm sma m2
Xi anning lam|
pa
"
S
Primary corona unit Developing uni
nt
Preconditioning exposure lamp " a
Cleaning roller Drum cleaner
ote
Sivcciedtales
.
|
S-@
Lower fixing roller
. . Transfer corona
Static charge unit ‘
Figure 2-1
This copier consists of the units shown
in Figure 2-1.
The image forming process is divided
into the eight steps shown below.
Step 1: Preconditioning exposure
Step 2: Primary corona (negative DC)
Step 3: Image exposure |
Step 4: Developing (positive plus AC)
Step 5: Transfer (negative DC)
Step 6: Separation
Step 7: Fixing
Step 8: Drum cleaning
Electrostatic latent image formation block
Registration
<= Flow of copy paper
~~ __ Direction of rotation of drum
Copy delivery
R .
Figure 2-2
COPYRIGHT © 1988. CANON INC. ; - CAHON WP-1215 REV.O MAR. 1988 PRINTED IN JAPAN (IMPRIME AU JAPON)
OES
Ser

The outer surface of the photosensitive
drum is a layer of organic photoconductor
(OPC). The base is an aluminum (conductive)
cylinder.
Photoconductive
layer
Figure 2-3
2. Electrostatic Latent Image Formation
Block en
This stage consists of three steps. At the
end of the stage, the drum has a pattern of
negative electrical charges on its surface
corresponding to the dark parts of the
document image. The light areas of the
document image are represented on the.
drum by an absence of charges.
The pattern of negative charges cannot
be seen by eye, hence it is called an
electrostatic latent image.
Time (t), ————»
0
S Haier
5 ae.
z / Light area
2 /
Sg 5001 i
f
8 /
ate,
3 ~
a etl s
e3| 6 Dark area
22/9
Zo] o
1000) 25) 2a
86! 2a Image exposure
3 a F2 (step 3)
agp at
Figure 2-4
3. Step 1 Preconditioning Exposure
Preconditioning
om exposure lamp
Filter
Figure 2-5
Before the primary corona step, light
from the preconditioning exposure lamps is
shone onto the surface of the drum (precon-
ditioning exposure). This process elimi-
nates residual charges and helps to make
the density of the copy even.
2-2 COPYRIGHT © 1986 CANON INC,
4. Step 2 Primary Corona
Primary corona unit
Figure 2-6
The primary corona (negative) applies a
uniform layer of negative charges over the
drum surface.
The drum surface potential is deter- coos
mined by the grid potential. The grid is
connected to ground through a varistor,
which holds the drum potential constant at
the varistor break-down voltage.
5. Step 3 Scanning Exposure
Light image
ie
Dark area’ Light area
Figure 2-7
Light from the original is projected onto
the drum surface.. Charges in these light
areas on the drum are neutralized by drum
photoresistive effects.
CANON WP-1215 REV.O MAR. 1988 PRINTED IN JAPAN {IMPRIME AU JAPON)

6. Step 4 Developing
Blade
Cylinder
.| Developing
Magnet ff cylinder
Figure 2-8
As shown in Figure 2-8, the developing
unit consists of a developing cylinder (a
stationary magnet surrounded by a rotating
sleeve) and a blade made of magnetic
material. Black toner is a single component
type consisting of a fine powder of mixed
magnetite and resin binder. The toner has
insulating properties and is charged to a
positive potential by friction with the rotat-
ing cylinder.
Color developer is a two-component
type consisting of iron powder (carrier) and
toner mixed together in a fixed ratio. The
main component of the toner is resin. The
toner is charged to a positive potential and
the iron powder to a negative potential by
friction with the rotating cylinder.
i“ Blade
Concentrated
¥ magnetic field
z,
Magnet Magnet
rs Developer
Figure 2-9
Aconcentrated magnetic field develops
between the magnet and the edge of the
blade. This field attracts the charged
developer. :
The developer is held virtually immobile
by the magnetic field, forming a curtain
along the edge of the blade. As the cylinder
rotates, this curtain skims the toner parti-
cles on its surface to a thin uniform layer.
An AC bias plus a negative DC bias are
applied simultaneously to the developing
cylinder so that the waveform of the devel-
oping bias has a larger negative excursion
than positive.
COPYRIGHT © 1988 CANON -INC.
Pasitive
{ excursion
~ | Negative
excursion.
Figure 2-10 |
DC bias
During copying toner is attracted to the
drum by the charges on the drum surface
and by repulsion due to the developing bias
(during the positive excursion), transform-
ing the latent electrostatic image into a
visible image. Excess toner particles are
attracted back to the cylinder from the drum
due to the charges on the drum surface and
the developing bias (during the negative
excursion).
The DC bias affects copy density and
fogging: As the DC bias becomes less
negative {approaches OV), the density and
degree of fogging both increase. 7
7. Step 5 Transfer
Copy paper
Transfer corona unit
Figure 2-11 |
In this step, a negative corona is applied
to the back of the copy paper, attracting the
toner from the surface of the drum to the
copy paper.
CANON HP-1215 REV.0 MAR. 1988 PRINTED IN JAPAN (IMPRIME AU JAPON) 2-3

8. Step 6 Separation
’ Copy paper
Static charge
oT ‘ _aliminator :
T: 1
Figure 2-12
The copy paper is separated from the
drum by utilizing its stiffness. Thin paper,
however, is not stiff, and may wrap around
the drum instead of separating from it. To
prevent this, a positive voltage is applied to
the separation static charge eliminator,
weakening the attraction between the drum
and the copy paper. This enables the paper
to separate easily from the drum.
9. Step 7 Fixing
Cleaning roller
Upper fixing roller
Tungsten-halogen
heater (Q00W)
Toner
Lower fixing roller.
Copy paper
Figure 2-13
In this step, the copy paper is pressed
between two heated rollers to make the
toner image permanent.
To prevent the copy paper from wrap-
ping around the roller and toner offsetting
(adhesion of toner to the roller and transfer
of the toner to the next copy), the surface
of the upper fixing roller is cleaned with the
cleaning roller.
2-4 COPYRIGHT © 1986 CANON INC.
10. Step 8 Drum Cleaning
Cleaning blade
Toner catcher
Figure 2-14
’ This step prepares the drum surface for
the. next copying operation. Any residual
toner scraped off the drum by the cleaning
blade‘ and picked up by the toner catcher.
It is then pushed to the back by the paddle.
CANON NP-1215 REV.O MAR. 1988 PRINTED IN JAPAN (IMPRIME At! JAPOR)

Il. AUXILIARY PROCESSES
1. Blank Exposure
Blank exposure is the process of shining
light onto is simply the removal of the drum
surface potential in the non-image areas
resulting from REDUCTION copying. (See
page 3- .) The light for this is produced by
the preconditioning lamp and is reflected
onto the drum by a reflector.
in the non-image area on the drum
between successive sheets of copy paper,
the grid bias of the primary corona is
reduced to prevent adhesion of toner. For
‘these areas, there is no blank exposure for
removal of the surface charges.
2. Ozone Filter
Acatalytic ozone filter in the exhaust fan
prevents ozone (generated by the coronas)
from escaping to the atmosphere by con-
verting the ozone to oxygen.
COPYRIGHT © #986 CANON INC.
CANON NP-1215 REVO MAR. (S88 PRINTED IN JAPAN (IMPRIME AU JAPOH)

I. BASIC OPERATION
A.. FUNCTIONS
\
'
The
copier
can
be
divided
into
four,
functional
sections:
paper
pick-up
and
feed
system,
|
exposure
system,
image
formation
system,
and
control
system.
: ;
i
!
{ =o ae
Exposure system
a ; Copyboerd
[rer ee ea Ee 8 Le aie te se ee a
|
|
NY
Image
formation;
| system t
—
, |
Photosensi-
tive drum
‘Sia Bene Transfer and
4
, —\1-
Se.
i
separation
Sv . unit '
I
: a '
, ‘ 1
|
I
|
1
|
J
Paper delivery
tray. Copy delivery
unit °
SS SSS Se
r
I
!
! |
|
if ! l
Figure 3-1
a
COPYRIGHT © 1988 CANON INC. CAHON HP-1215 REV.0 MAH. 1988 PRINTED IN JAPAN (HMPRIME AU JAPON) 3-1

B. OUTLINE OF ELECTRICAL CIRCUITS
The major electrical operations of the copier are controlled by the microprocessor on the
DC controiler PCB. This microprocessor is programmed to read input signals from the sensors
and control panel keys, and to send commands to drive loads (motors, solenoids, lamps, and
other devices) in response at the necessary times.
For reference:
The microprocessor used in this copier incorporates an A/D converter enabling it to read
analog signals as well as digital signals. Signals marked by (A) in Figure 3-2 are analog signals.
Main motor M1 is a synchronous type and runs at a speed determined by the AC line frequency,
Scanner drive motor M2 is a stepping type, and runs at'a frequency determined by a crystal
controlled oscillator in the DC controller. Any variation of the AC line frequency will affect only
the main motor; this could result in compressed or elongated images.
DC controller
Control panel
keys
Scanner at HOME position;
Lens at HOME position
Cassette paper sensor;
Delivery unit paper sensor
Pick-up unit paper sensor
(Photointerrupter)
Cassette size sensor;
Manuat feed tray position SW
sensor
.
5
a
a
Switch 3
2 |
£
a i
5 I
3
f : ® = :
Fixing roller surface
temperature sensor
Thermistor
®
AE sensor
Remaining toner {black} La |
sensor
24V power supply fault seivor
Control panel LED
indicators
HVT
Lamp
regulator
Poor aniten Noise filter
D2 be foeHO [oee
Circuit breaker Main switch
Figure 3-2
Exhaust fan;
Scanner cooling fan;
Feeder suction fan
Registration roller clutch
Pick-up roller clutch
solenoid
Preconditioning exposure
lamp
Scanner motor
Primary/transfer
corona unit;
Developing cylinder
(ua) Scanning lamp
Fixing roller heater;
Main motor;
DF/ADF {aption);
Sorter (option)
3-2
COPYRIGHT
©
1988
CANON
HIC,
">
CANON
NP-1215
AEV.O
MAR, 1988
PRINTED
1H
JAPAN
(UMPRIME
AU
JAPON)

C. DC CONTROLLER INPUTS (1/2)
Q3
fee
a
Scanner at
HOME position
Lens at HOME
position
Q4 :
J24-1 J314-7 t
-3 -§
ai =2 = =
=)
Ql ' 3606
DC controller PCB
1 : !
When scanner is at HOME position — “1""
(when light blocking plate is in,Q3) |
When lens is at HOME position > 1"
{when light blocking plate is at Q4)
, J310 5V
J17-1 -1r=-~-—13604-2 —-10 4
Cassette
paper
—3
-31
if
T
5
7|)=
When
lens
is
no
copy
paper
in
cassette
>
0"
sensor
t
“4-8
CPEP
(when
light
blocking
plate
is
not
in
Q1)
4
ae tl ae
3
3
I
t
Remaining
black
eae
%
J310!
toner
sensor
!
—
3
TEP
When
toner
in
black
developing
unit
u
er
falls
below
specified
level
>
"0"
L
J
CDP
When
black
developing
unit
is
in
place
>
“0”
Lamp regulator
| | 3308-2
|
|
CSZ0
| |
|
tteshi
{osz
enerr
Cassette
size
sensor
CSZ1
Cassette
size
sensor
switches
are
connected
PCB
|
SW7
6
2]
in
a
matrix
(see
page
3-29.)
+f}; —
+-[00}4
| | sw763
| |
5
[pas
8
i
ge
|
?t-L92
When
cassette
is
present
—
‘0!
| 76410 oy
L
Sse |
Pick-up unit paper
sensor
Manual feed tray
position sensor
Figure 3-3
COPYRIGHT © 1988 CANON INC.
CANON NP-1215 REV.0 MAR. 1988 PRINTED IN JAPAN (IMPRIME AU JAPON)
When copy paper is sensed > "1°"
(when light blocking plate is in 2)
When manual feed tray is closed -> “0”