Canon PC921 Support Question
Canon PC921 Support Question
Find answers below for this question about Canon PC921.Need a Canon PC921 manual? We have 1 online manual for this item!
Question posted by nrockler on September 21st, 2011
Why Does My Canon 921 Crease The Paper Before Completing A Copy.
Smooth paper goes in, creased paper comes out with poor printing around the creases.
Current Answers
Related Canon PC921 Manual Pages
Service Manual - Page 9
... on
the Composite Power Supply PCB 7-6 D. External Covers 7-8 B. Copyboard Glass 7-16 D. ADF 8-1 A. Controlling the Pickup Motor 8-14
H. Drive System 8-23 D. Placing Copy Paper 9-9 III. CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
vii Main Motor/Main Drive Assembly 7-17 E. Detecting an Original 8-6 E. Detecting Original Jams ..... 8-16...
Service Manual - Page 10
...Mechanical 11-5 B. TROUBLESHOOTING MALFUNCTIONS 11-61
A. Copy Paper Jam 11-75 B. Switches 11-80 C. Variable Resistors (VR) and Check Pins by PCB .......... 11-84
VII. DC CONTROLLER CIRCUIT
DIAGRAM A-7 E. BLANK EXPOSURE (front) CIRCUIT DIAGRAM A-33
M. BLANK EXPOSURE (rear) CIRCUIT DIAGRAM A-34
N. CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) Sensors...
Service Manual - Page 13
... unit may be opened to 1/1000 compared with existing Canon machines).
3. Ecology-Conscious • The use of the ADF. CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
1-1 Personal Copier with the use of a roller charging method has resulted in a considerable reduction of paper (500-sheet cassette + multifeeder; SURF Fixing Assembly •...
Service Manual - Page 15
... size Reproduction ratio Zoom Wait time First copy time Continuous copying Copy size Copy paper type
Cassette
Multifeeder tray Copy tray Non-image width Auto power-off
COPYRIGHT © 1999 CANON INC. A4R), postcard*3
Double-Sided/Overlay Copying*5: Plain paper (64 to 128 g/m2), colored paper, business card (200 g/m2 or less), recycled paper (64 to 141% (in 1% increments*1)
0 sec (at...
Service Manual - Page 16
... REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) Upon delivery, be sure to models with a zoom function. *2. If stopped because paper ran out during copying operation, 1 hr.
1-4
COPYRIGHT © 1999 CANON INC. Applies only to remove each from the copy tray. *5. Be sure to single pickup if the multifeeder is used. *3. CHAPTER 1 GENERAL DESCRIPTION...
Service Manual - Page 17
CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
1-5 Others
Item Operating condition
Temperature Humidity Atmospheric pressure
Power source... lb*1, 25.2 kg*2/ 55.4 lb*2 Multifeeder type: 24.0 kg*1/ 52.8 lb*1, 25.4 kg*2/ 55.9 lb*2
Copy paper: Keep wrapped, and protect against humidity. Toner: Avoid direct sunlight, and store at 40°C/104°F, 85%
or less. reference only...
Service Manual - Page 27
... default ratio.
CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
1-15 continuous copying)
Stops copying or returns copying mode to a jam.
• Indicates the number of copies manually.
Flashes in response to standard mode. Standard Mode Ratio: 100% Count: 1 Paper source: cassette Copy density: auto
mode
Starts copying. Name
1 Copy density adjusting lever...
Service Manual - Page 28
... key*2
13 Paper selection key*1
Description Sets the number of copies or a zoom ratio. Remarks
May be between 70% and 141% in 1% increments.
14 Default ratio key
Selects a default reproduction ratio.
15 Copy density mode selection key
Selects copying density mode. Applies only to a multifeeder model. *2.
CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME...
Service Manual - Page 29
... key for 4 sec or
more. • The count/ratio indicator will be soiled or copy paper tends to end the mode.
CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
1-17 Soiled Images a. COPYRIGHT © 1999 CANON INC. ROUTINE MAINTENANCE BY THE USER
Instruct the user to clean the following if images...
Service Manual - Page 33
Fixing
4. Separation
Registration
: Flow of copy paper
Cassette
: Rotation of the following seven steps: Step 1 Primary charging (AC +...Fixing Step 7 Drum cleaning
Static latent image formation block
1. Drum cleaning
3. Primary charging
2. CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
1-21 CHAPTER 1 GENERAL DESCRIPTION
The machine's image formation process ...
Service Manual - Page 54
... of the motor varies according to move the scanner forward or in Direct). CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) When moving the scanner forward in reverse....to the
selected reproduction ratio on the other hand, its speed remains the same regardless of copy paper and the selected reproduction ratio. M2
SC_COM SC_B* SC_B SC_COM SC_A* SC_A
PS1 Light-blocking...
Service Manual - Page 55
... position detection
Figure 3-105
The microprocessor on how length is detected, see p. 5-10.
CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
3-5 The forward movement distance of the scanner varies according to the falling edge of copy paper and reproduction ratio. If the ratio is less than 130%, the scanner is...
Service Manual - Page 56
... home position.
CHAPTER 3 EXPOSURE SYSTEM
4.
CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) Figure 3-106
3-6
COPYRIGHT © 1999 CANON INC. To prevent possible overheating of the ...730;C or higher II
I : When the pre-registration roller paper sensor (Q751) is off to 6 cpm. II : By the time the Copy Start key is pressed or the power switch is reduced to...
Service Manual - Page 97
CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
4-3
Timing Chart for the Image Formation System
Basic Sequence of Operations (Direct, 2 copies, continuous)
Copy Start key ON
STBY INTR
SCFW
...0.6sec.(approx.)
Static eliminator bias
3200V
Pre-registration roller paper sensor (Q751)
Figure 4-102
COPYRIGHT © 1999 CANON INC. CHAPTER 4 IMAGE FORMATION SYSTEM
B.
Service Manual - Page 107
...104 Relationship between Developing DC Bias and Signals
3.
posite power supply PCB a specific period of time after copy paper has moved past the registration sensor. CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
4-13
The DC controller PCB sends the developing AC bias ON signal ... is modified/rectified and then supplied to the com-
COPYRIGHT © 1999 CANON INC.
Service Manual - Page 114
...PRINTED IN JAPAN (IMPRIME AU JAPON) Lighter Darker
SW101 Figure 4-120
4-20
COPYRIGHT © 1999 CANON INC. VR103
Figure 4-119
9) Repeat steps 5) through 8) so that it is free of fogging and the density of its place, place five blank sheets of copy paper...go back to step 5) and make adjustments once again.
10) Make a copy, and check to make sure that the values of the indicator is noted ...
Service Manual - Page 118
... lighting) for 5 min and then is left alone for an appreciable time, the images will develop poor contact. 2. CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) If you must clean it rotates when
making copies. Do not use a flannel cloth.
Reference: If the photosensitive drum is exposed to light of...
Service Manual - Page 125
... drum;
CHAPTER 5 PICK-UP/FEEDING SYSTEM
I. PICKUP/FEEDING SYSTEM
A. From the cassette, multifeeder, or single-feeder, copy paper is picked up and is equipped with four sensors used to reach the copy tray.
CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
5-1 Notation
Name
PS3 Delivery sensor
Remarks
PS4 Vertical path roller...
Service Manual - Page 138
... if copy paper doesnot reach the vertical path roller paper sensor within a specific period of paper will stop the main motor in the Cassette Pickup Assembly When re-pickup operation is executed (from the cassette) , the absence of time. Absence of Paper in about 1.5 sec, and indicate the Add Paper message. CANON PC800s/900s REV.0 AUG. 1999 PRINTED...
Service Manual - Page 357
... 2 copies, DIRECT, from cassette)
SCRV LSTR
STBY
A-2
1 Pickup motor (M2)
2 Belt motor (M1)
ADF 3 4
Original detection sensor (PI3)
Registration paper sensor ...SL5)
Vertical path roller 8 paper sensor (PS4)
9
Registration clutch solenoid (SL2)
10 Copier
Pre-registration roller paper sensor (Q751)
11 Scanning...CANON INC. CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
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