Canon PC800 Series How to use

COPYRIGHT © 1999 CANON INC. CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
REVISION 0
FY8-23B6-000
AUG. 1999
PC860
F13-8491 TYA00001-
PC880
F13-8291 TZA00001-
PC890
F13-8242 UAA00001-
PC920
F13-8431 TVB00001-
F13-8441 PUD00001-
PUE00001-
F13-8461 PUH00001-
PC921
F13-8432 TVC00001-
PC940
F13-8436 TVD00001-
PC941
F13-8437 TVE00001-
PC950
F13-8231 TVF00001-
F13-8241 PUF00001-
PUG00001-
PC960
F13-8434 TVG00001-
PC980
F13-8232 TVH00001-
PC981
F13-8233 TVJ00001-

COPYRIGHT © 1999 CANON INC. CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
IMPORTANT
THIS DOCUMENTATION IS PUBLISHED BY CANON INC., JAPAN, TO SERVE AS A SOURCE
OF REFERENCE FOR WORK INTHE FIELD.
SPECIFICATIONS AND OTHER INFORMATION CONTAINED HEREIN MAY VARY SLIGHTLY
FROM ACTUAL MACHINE VALUES OR THOSE FOUND IN ADVERTISING AND OTHER
PRINTED MATTER.
ANYQUESTIONSREGARDINGINFORMATIONCONTAINEDHEREINSHOULDBEDIRECTED
TOTHE COPIER SERVICE DEPARTMENT OF THE SALES COMPANY.
THIS DOCUMENTATION IS INTENDED FOR ALL SALES AREAS, AND MAY CONTAIN INFOR-
MATION NOT APPLICABLETO CERTAIN AREAS.
COPYRIGHT © 1999 CANON INC.
Printed in Japan
Imprimé au Japon
Use of this manual should be strictly su-
pervised to avoid disclosure of confidential
information.
Prepared by
OFFICE IMAGING PRODUCTSTECHNICAL SUPPORT DIVISION
CANON INC.
5-1, Hakusan 7-chome,Toride-shi, Ibaraki 302-8501 Japan

i
Model
PC860
PC880
PC890
PC920
PC920
PC920
PC920
PC921
PC940
PC941
PC950
PC950
PC950
PC960
PC980
PC981
Type
code
TYA
TZA
UAA
PUD
PUE
PUH
TVB
TVC
TVD
TVE
PUF
PUG
TVF
TVG
TVH
TVJ
Multi-
feeder
√
√
√
√
√
√
√
√
Single
feeder
√
√
√
√
√
√
√
√
Zoom
√
√
√
√
√
√
√
√
√
√
√
√
√
Default
ratio
2R2E
2R2E
2R2E
2R2E
2R2E
2R2E
3R1E
3R1E
3R1E
3R1E
2R2E
2R2E
3R1E
3R1E
3R1E
3R1E
ADF
as
standard
√
√
√
√
Cassette
250 sheets
250 sheets
250 sheets
Universal
Universal
Universal
Universal
Universal
Universal
Universal
Universal
Universal
500 sheets
Universal
500 sheets
500 sheets
Copying
speed
(cpm) at
Direct
12
12
12
10
10
10
10
10
13
13
12
12
13
10
13
13
The notation “√” indicates that the item in question is available.
• This service handbook covers the models shown in the following table. Be sure to have
a good understanding of the difference from model to model before referring to this
handbook.
Density
correction
switch
(SW101)
√
√
√
√
√
√
√
√

ii

iii
CONTENTS
CHAPTER 1 MAINTENANCE AND INSPECTION
CHAPTER 2 STANDARDS AND ADJUSTMENTS
CHAPTER 3 ARRANGEMENT AND FUNCTIONS OF
ELECTRICAL PARTS
A. Periodically Replaced Parts.........1-1
B. Durables and Consumables.........1-1
C. Scheduled Servicing ....................1-1
D. Storing and Handling
the Cratridge ................................1-2
D-1.Storing the Cartridge with
the Packaging Seal Intact ............1-2
D-2.Storing and Handling the Cartridge
with the Packaging Seal
Removed......................................1-3
E. Image Adjustment Basic
Procedure.....................................1-7
F. Points to Note for Servicing .........1-8
A. Mechanical...................................2-1
B. ADF ........................................... 2-26
A. Sensors and Solenoids................3-1
B. Switches.......................................3-2
C. Lamp, Heater, Motor, Etc. ............3-3
D. PCBs ............................................3-4
1
2
3
4
C. Electrical ................................... 2-37
E. ADF ..............................................3-5
F. Variable Resistors (VR) and
Check Pins by PCB......................3-6
CHAPTER 4 SELF DIAGNOSIS
A. Self Diagnosis ..............................4-1
APPENDIX
A. General Timing Chart.................. A-1
B. Signals and Abbreviations .......... A-3
C. General Circuit Diagram ............. A-5
D. Special Tools ............................... A-7
E. Solvents/Oils ............................... A-8
F. Specifications.............................. A-9

CHAPTER 1 MAINTENANCE AND INSPECTION
1-1
CHAPTER 1 MAINTENANCE AND INSPECTION
A. Periodically Replaced Parts
The machine does not have parts which must be replaced on a periodical basis.
B. Durables and Consumables
The machine does not have items designated as durables or consumables.
C. Scheduled Servicing
The machine does not have any parts which require scheduled servicing.
1

CHAPTER 1 MAINTENANCE AND INSPECTION
1-2
D. Storing and Handling the Cartridge
The cartridge is subject to the effects of the environment whether its packing seal is intact or
removed or whether it is inside the machine or otherwise, changing over time regardless of the
number of copies made. The degree of change is highly dependent on the site of installation and
how it is maintained, and no general rule may be drawn; however, it is important to exercise care
when storing or handling it.
D-1. Storing the Cartridge with the Packaging Seal Intact
If you are storing the cartridge in a warehouse or workshop, be sure that the environment is as
indicated in Table 1-1; in addition, keep the following in mind:
• Avoid direct rays of the sun.
• Avoid vibration.
• Do not subject it to impact (as by hitting or dropping it).
Table 1-1 Temperature/Humidity Conditions for Storage
Temperature
between -20°C/-4°F and 40°C/104°F Humidity 90% or less
between 0°C/32°F and 35°C/95°F
between 35°C/95°F and 45°C/113°F
between -20°C/-4°F and 0°C/32°F
from 40°C/104°F to 15°C/59°F
from -20°C/-4°F to 25°C/77°F
between 35% and 85% RH
between 85% and 95% RH
between 10% and 35% RH
between 613.3 and 1013.3
(hPa; 0.6 to 1 atm)
Temperature
Normal (9/10 of entire storage period)
Harsh (1/10 of entire storage period)
Temperature changes (within 3-min period; approx.)
Normal (9/10 of entire storage period)
Harsh (1/10 of entire storage period)
Atmospheric pressure
High temperature
Low temperature
Humidity
High humidity
Low humidity
Table 1-2 Conditions for Transportation

CHAPTER 1 MAINTENANCE AND INSPECTION
1-3
D-2. Storing and Handling the Cartridge with the Packaging Seal
Removed
The photosensitive medium is an organic photoconducting (OPC) material, which would dete-
riorate if subjected to storing light.
The cartridge also holds toner, requiring the user to exercise care when storing or handling it.
(Be sure that the user stores it in an appropriate storage box for storage.)
1. Storage after Removing the Packaging Seal
a. Avoid areas subject to the direct rays of the sun, i.e., near a window. Do not keep it in a car for
a long time, as it will be subjected to an extremely high temperature. (This applies even if the
cartridge is inside a protective box.)
b. Avoid areas subjected to high or low temperature/humidity or where temperature or humidity
tends to change abruptly (e.g., near an air conditioner).
c. Avoid areas subject to dust, ammonium gas, or organic solvent.
d. Make sure that the cartridge is stored at 40°C/104°F or lower.

CHAPTER 1 MAINTENANCE AND INSPECTION
1-4
2. Handling the Cartridge
a. Before setting the cartridge in the machine or if copies have white spots as when it starts to run
out of toner, hold the cartridge level and shake it about 90° several times as shown in Figure 1-
1 to even out the toner inside.
If you shake it in a different way, the toner can spill out of the developing assembly or the
cleaning assembly.
Figure 1-1
b. Do not place the cartridge on its end or turn it over as shown in Figure 1-2.
Figure 1-2

CHAPTER 1 MAINTENANCE AND INSPECTION
1-5
c. Do not touch the surface of the photosensitive drum as by opening the shutter for the photosen-
sitive drum cover found at the bottom of the cartridge.
(If you have soiled the surface of the photosensitive drum, wipe it with a flannel cloth coated
with toner. Do not clean it using solvents.)
d. Do not disassemble the cartridge.
e. Do not subject the cartridge to excess vibration or impact. In particular, do not impose force on
the shutter for the photosensitive drum shutter.
f. Make sure that it is out of reach of children.
g. The photosensitive drum is susceptible to strong light, and the light-blocking shutter is pro-
vided as a means of protection.
If the drum is exposed to strong light for a long time, however, copies can start to show white
spots or vertical bands. Try leaving the machine alone as long as possible if such a problem is
noted; the memory (i.e., cause of white spots or vertical bands), however, may not disappear.
Keep the following in mind:
Caution:
1. Try to work briskly when removing a jam or replacing the cartridge.
2. If the cartridge must be taken out of the machine for storage, be sure to put it in a protective
box or put a cover over it. Do not leave it outside the machine unprotected.
Reference:
If the photosensitive drum is exposed to light of 1500 lux (general lighting) for 5 min and then
left alone in a dark place for 5 min, it should recover so that it will not cause practical prob-
lems. Nevertheless, avoid direct sunshine. (The rays of the sun is as strong as 10000 and
30000 lux.)

1-7
E. Image Adjustment Basic Procedure
Making Pre-Checks Adjusting the Optimum Density
Clean the parts.
Is the copy density
correction switch (SW101) set
to the middle index?
(Note 1)
Set it at
the middle.
Select non-AE, and set the copy density
adjusting lever to the middle index; then,
make two to three copies of the Test
Sheet (NA-3).
Check the following:
1. Density of gray scale No. 9
2. Presence/absence of difference between front
and rear (Note 2)
3. Density of gray scale No. 1 (good or bad; Note 2)
4. Fogging of background (Note 2)
NO
YES
Scanning system,
pickup/feeding system,
delivery assembly
Check the following:
1. Cartridge
2. Scanning lamp
3. AE sensor PCB
4. DC controller PCB
5. Composite power supply PCB
(See the appropriate troubleshooting
procedure.)
Is the optimum
density obtained by intensity
adjustment?
(Note 3)
Can the
deviation be corrected
using the copy density correction
switch (SW101)?
(Note 1)
Is gray scale No. 9
barely visible?
END
YES
YES
YES
NO
NO
NO
Note:
1. Applies only if the machine is equipped with a copy
density correction switch (SW101).
2. The machine is not equipped with a function to
correct image faults. See the appropriate
troubleshooting procedure.
3. See p. 2-38.

1-8
F. Points to Note for Servicing
Copyboard cover
Item Tools/solvent Work/remarks
Copyboard glass
Scanning lamp
Reflecting plate
No. 1 through
No. 6 mirror
Alcohol
Alcohol
Lint-free paper
Blower brush
Cleaning.
Cleaning.
Dry wiping.
If dirt cannot be removed,
dry-wiping with lint-free
paper.
Lens Blower brush Cleaning.
Inlet guide
Item Tools/solvent Work/remarks
Solvent Cleaning.
Drum cover
shutter
Item Tools/solvents Work/remarks
Most cloth Cleaning; be sure to
remove all toner to prevent
toner soiling images.
Single-feeder
pickup roller
Item Tools/solvents Work/remarks
Multifeeder,
Pickup roller
Cassette pickup
roller
Registration roller
Transfer guide
Moist cloth
Moist cloth
Cleaning.
Cleaning.
Cleaning.
Transfer charging
roller
Static eliminator
Feed belt
Lint-free paper
Special brush
Moist cloth
Cleaning.
Cleaning.
Cleaning.
Cleaning.
Moist cloth or alcohol
Moist cloth or alcohol
Moist cloth or alcohol
Cleaning. Do not use
water or solvent.Take
care not to touch it or
leave solvent or oil.
Copyboard, Scanner
Feeding belt
Item Tool/solvent
Separation pad
Cloth moistened with
water*
Cloth
Dry-wiping.
Cleaning.
Pickup roller Cloth moistened with
water* or alcohol Cleaning.
ADF
Fixing Assembly, Delivery Assembly Pickup, Feeding, and Transfer Assemblies and Static Eliminator
Cartridge
Work/remarks
*Be sure to wring it well.

CHAPTER2 STANDARDSANDADJUSTMENTS
2-1
CHAPTER 2 STANDARDS AND ADJUSTMENTS
A. Mechanical
1. Copier
a. Leading Edge Non-Image Width
Make adjustments so that the leading edge non-image width is 2.0 ±1.5 mm when the Test
Sheet is copied in Direct.
Caution:
If you have performed this adjustment, be sure to adjust the image leading edge margin.
Figure 2-1
1) Turn VR105 on the DC controller PCB so that the width is as indicated.
Figure 2-2
Table 2-1
Turing VR105 and Leading Edge Non-Image Width
Direction of VR105
Clockwise
Counterclockwise
Leading edge non-image width
Decreases
Increases
2.0 ± 1.5mm
VR105
J102
J101
J107
J101J131
VR103VR102 J103
J130 J114
J104
J105 J109
J106
J102
VR104VR105VR106
VR107
2

CHAPTER2 STANDARDS ANDADJUSTMENTS
2-2
b. Image Leading Edge Margin (registration activation timing)
Make adjustments so that the leading edge margin is 2.5 ±1.5 mm when the Test Sheet is
copied.
Caution:
Be sure to check that the leading edge non-image width is as indicated before performing this
adjustment.
Figure 2-3
1) Turn VR104 on the DC controller PCB so that the margin is as indicated.
Figure 2-4
Table 2-2
Direction of VR104
Clockwise
Counterclockwise
Image leading edge margin
Increases
Decreases
Turing VR104 and Image Leading Edge Margin
2.5 ± 1.5mm
VR104
J102
J101
J107
J101J131
VR103VR102 J103
J130 J114
J104
J105 J109
J106
J102
VR104VR105VR106
VR107

CHAPTER2 STANDARDSANDADJUSTMENTS
2-3
c. Adjusting the Mirror Position (optical length between No. 1 mirror and No. 2 mirror)
If you have replaced the scanner drive cable, you must adjust the mirror position, by changing
the position of the cable retainer of the No. 1 mirror mount.
Reference:
1. As more and more copies are made, the cable tends to become slack, requiring adjustment.
2. If the optical length between the No. 1 mirror and the No. 2 mirror is not correct, the horizontal
reproduction ratio will be wrong, causing poor sharpness or blurred images.
1) Fit the mirror positioning tool (FY9-3009) as shown.
Figure 2-5
2) Remove the copyboard glass.
3) Loosen the screws used to secure the cable retainer at the rear and the front of the No. 1 mirror
mount [1].
Figure 2-6
[1]

CHAPTER2 STANDARDS ANDADJUSTMENTS
2-4
4) Turnthecable drive pulley[3]so that thethreeshafts [2] ofthemirror positioning toolforthe front
and the rear may be arranged as shown.
Figure 2-7 (rear)
Figure 2-8 (front)
[3][2]
[2]
[2]
[2]

CHAPTER2 STANDARDSANDADJUSTMENTS
2-5
5) Whilekeepingthe condition of4), tighten thepositioning screw atthe rear andthefront oftheNo.
1mirror mount[1].
Figure 2-9 (rear)
Figure 2-10 (front)
[1]
[1]

CHAPTER2 STANDARDS ANDADJUSTMENTS
2-6
d. Checking the Force of the Cassette Spring
If the force of the spring used to hold up the holding plate of the cassette is not correct, pickup
faults or the like can occur.
If a fault is suspected, check the force of the spring using a spring gauge (CK-0054), and
replace the spring if it is not as indicated:
Standard: 970 ±150 g
MakingMeasurements
Push the spring gauge against the middle of the spring as shown, and check to make sure that
the reading of the spring gauge is 970 ±150 g when the holding plate is 18 mm away from the
bottom of the cassette.
Figure 2-11
Spring gauge
(CK-0054)
Holding plate
18mm
Cassette spring Cassette