Canon PC800, PC900 Service Handbook

0 (0)

REVISION 0

PC860

F13-8491 TYA00001-

PC880

F13-8291 TZA00001-

PC890

F13-8242 UAA00001-

PC920

F13-8431 TVB00001-

F13-8441 PUD00001PUE00001- F13-8461 PUH00001-

PC921

F13-8432 TVC00001-

PC940

F13-8436 TVD00001-

PC941

F13-8437 TVE00001-

PC950

F13-8231 TVF00001-

F13-8241 PUF00001PUG00001-

PC960

F13-8434 TVG00001-

PC980

F13-8232 TVH00001-

PC981

F13-8233 TVJ00001-

AUG. 1999

FY8-23B6-000

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 IN THE FIELD.

SPECIFICATIONS AND OTHER INFORMATION CONTAINED HEREIN MAY VARY SLIGHTLY FROM ACTUAL MACHINE VALUES OR THOSE FOUND IN ADVERTISING AND OTHER PRINTED MATTER.

ANY QUESTIONS REGARDING INFORMATION CONTAINED HEREIN SHOULD BE DIRECTED TO THE COPIER SERVICE DEPARTMENT OF THE SALES COMPANY.

THIS DOCUMENTATION IS INTENDED FOR ALL SALES AREAS, AND MAY CONTAIN INFORMATION NOT APPLICABLE TO CERTAIN AREAS.

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 PRODUCTS TECHNICAL SUPPORT DIVISION

CANON INC.

5-1, Hakusan 7-chome, Toride-shi, Ibaraki 302-8501 Japan

CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)

•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.

Model	Type	Multi-	Single	Zoom	Default	Density	ADF	Cassette	Copying
	code	feeder	feeder		ratio	correction	as		speed
						switch	standard		(cpm) at
						(SW101)			Direct
PC860	TYA		Ö	Ö	2R2E	Ö		250 sheets	12
PC880	TZA	Ö		Ö	2R2E	Ö		250 sheets	12
PC890	UAA	Ö		Ö	2R2E	Ö	Ö	250 sheets	12
PC920	PUD		Ö	Ö	2R2E	Ö		Universal	10
PC920	PUE		Ö	Ö	2R2E	Ö		Universal	10
PC920	PUH		Ö	Ö	2R2E	Ö		Universal	10
PC920	TVB		Ö	Ö	3R1E			Universal	10
PC921	TVC		Ö		3R1E			Universal	10
PC940	TVD		Ö	Ö	3R1E			Universal	13
PC941	TVE	Ö	Ö	Ö	3R1E	Ö		Universal	13
PC950	PUF	Ö		Ö	2R2E	Ö		Universal	12
PC950	PUG	Ö		Ö	2R2E	Ö		Universal	12
PC950	TVF	Ö		Ö	3R1E		Ö	500 sheets	13
PC960	TVG	Ö		Ö	3R1E		Ö	Universal	10
PC980	TVH	Ö		Ö	3R1E		Ö	500 sheets	13
PC981	TVJ	Ö			3R1E		Ö	500 sheets	13

The notation “ Ö” indicates that the item in question is available.

i i

CHAPTER 1 MAINTENANCE AND INSPECTION

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

CHAPTER 2 STANDARDS AND ADJUSTMENTS

A.	Mechanical	...................................2-1	C. Electrical ...................................	2-37
B.	ADF ...........................................	2-26

CHAPTER 3 ARRANGEMENT AND FUNCTIONS OF

ELECTRICAL PARTS

A.	Sensors and Solenoids ................	3-1	E.	ADF ..............................................	3-5
B.	Switches .......................................	3-2	F.	Variable Resistors (VR) and
C. Lamp, Heater, Motor, Etc. ............		3-3		Check Pins by PCB ......................	3-6
D.	PCBs ............................................	3-4

CHAPTER 4 SELF DIAGNOSIS

A. Self Diagnosis ..............................	4-1

APPENDIX

A.	General Timing Chart ..................	A-1	D.	Special Tools ...............................	A-7
B.	Signals and Abbreviations ..........	A-3	E.	Solvents/Oils ...............................	A-8
C.	General Circuit Diagram .............	A-5	F.	Specifications ..............................	A-9

iii

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.

1-1

CHAPTER 1 MAINTENANCE AND INSPECTION

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).

Temperature	Normal (9/10 of entire storage period)				between 0°C/32°F and 35°C/95°F

			High temperature		between 35°C/95°F and 45°C/113°F
			High temperature		between 35°C/95°F and 45°C/113°F
	Harsh (1/10 of entire storage period)
	Harsh (1/10 of entire storage period)		Low temperature		between -20°C/-4°F and 0°C/32°F
			Low temperature		between -20°C/-4°F and 0°C/32°F

	Temperature changes (within 3-min period; approx.)				from 40°C/104°F to 15°C/59°F
	Temperature changes (within 3-min period; approx.)				from -20°C/-4°F to 25°C/77°F
					from -20°C/-4°F to 25°C/77°F

Humidity	Normal (9/10 of entire storage period)				between 35% and 85% RH

			High humidity		between 85% and 95% RH
			High humidity		between 85% and 95% RH
	Harsh (1/10 of entire storage period)
	Harsh (1/10 of entire storage period)		Low humidity		between 10% and 35% RH
			Low humidity		between 10% and 35% RH

		Atmospheric pressure			between 613.3 and 1013.3
		Atmospheric pressure			(hPa; 0.6 to 1 atm)
					(hPa; 0.6 to 1 atm)

		Table 1-1 Temperature/Humidity Conditions for Storage

		Temperature			Humidity
		between -20°C/-4°F and 40°C/104°F		90% or less

Table 1-2 Conditions for Transportation

1-2

CHAPTER 1 MAINTENANCE AND INSPECTION

D-2. Storing and Handling the Cartridge with the Packaging Seal Removed

The photosensitive medium is an organic photoconducting (OPC) material, which would deteriorate 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.

1-3

CHAPTER 1 MAINTENANCE AND INSPECTION

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

1-4

CHAPTER 1 MAINTENANCE AND INSPECTION

c.Do not touch the surface of the photosensitive drum as by opening the shutter for the photosensitive 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 provided 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 problems. Nevertheless, avoid direct sunshine. (The rays of the sun is as strong as 10000 and 30000 lux.)

1-5

Making Pre-Checks

Clean the parts.

Scanning system, pickup/feeding system, delivery assembly

Is the copy density correction switch (SW101) set to the middle index?

(Note 1)

Set it at	YES
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)

E.Image Adjustment Basic Procedure

Adjusting the Optimum Density

Is gray scale No.	9	YES
barely visible?

Can the

deviation be corrected

YES

using the copy density correction switch (SW101)?

(Note 1)

Is the optimum

density obtained by intensity YES adjustment?

(Note 3)

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.)

END

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.

1-7

F.Points to Note for Servicing

Copyboard, Scanner

Item	Tools/solvent	Work/remarks

Copyboard cover	Alcohol	Cleaning.
Copyboard glass	Alcohol	Cleaning.
Lens	Blower brush	Cleaning.
Scanning lamp	Lint-free paper	Dry wiping.
Reflecting plate	Blower brush	If dirt cannot be removed,
No. 1 through		dry-wiping with lint-free
No. 6 mirror		paper.

Fixing Assembly, Delivery Assembly

Item	Tools/solvent	Work/remarks

Inlet guide	Solvent	Cleaning.

ADF

Item	Tool/solvent	Work/remarks

Feeding belt	Cloth moistened with	Dry-wiping.
	water*
Separation pad	Cloth	Cleaning.
Pickup roller	Cloth moistened with	Cleaning.
	water* or alcohol

*Be sure to wring it well.

Cartridge

Item	Tools/solvents	Work/remarks

Drum cover	Most cloth	Cleaning; be sure to
shutter		remove all toner to prevent
		toner soiling images.

Pickup, Feeding, and Transfer Assemblies and Static Eliminator

Item	Tools/solvents	Work/remarks

Single-feeder	Moist cloth or alcohol	Cleaning.
pickup roller
Multifeeder,	Moist cloth or alcohol	Cleaning.
Pickup roller
Cassette pickup	Moist cloth or alcohol	Cleaning.
roller
Registration roller	Moist cloth	Cleaning.
Transfer guide	Moist cloth	Cleaning.
Transfer charging	Lint-free paper	Cleaning. Do not use
roller		water or solvent. Take
		care not to touch it or
		leave solvent or oil.
Static eliminator	Special brush	Cleaning.
Feed belt	Moist cloth	Cleaning.

1-8

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.

2.0 ± 1.5mm

Figure 2-1

1) Turn VR105 on the DC controller PCB so that the width is as indicated.

J130		J114
J101			J102	J101
J131
VR103VR102	J107	J103	J104
VR103VR102

VR105

J102

VR104VR105VR106

VR107

J106

J105

J109

Figure 2-2

Turing VR105 and Leading Edge Non-Image Width

Direction of VR105		Leading edge non-image width
Clockwise		Decreases
Counterclockwise		Increases
	Table 2-1

2-1

CHAPTER 2 STANDARDS AND ADJUSTMENTS

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.

2.5 ± 1.5mm

Figure 2-3

1) Turn VR104 on the DC controller PCB so that the margin is as indicated.

VR104

J130		J114
J101			J102	J101
J131
VR103VR102	J107	J103	J104
VR103VR102

J102

VR104VR105VR106

VR107

J106

J105

J109

	Figure 2-4
Turing VR104 and Image Leading Edge Margin

Direction of VR104		Image leading edge margin
Clockwise		Increases
Counterclockwise		Decreases

Table 2-2

2-2

CHAPTER 2 STANDARDS AND ADJUSTMENTS

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].

[1]

Figure 2-6

2-3

CHAPTER 2 STANDARDS AND ADJUSTMENTS

4)Turn the cable drive pulley [3] so that the three shafts [2] of the mirror positioning tool for the front and the rear may be arranged as shown.

[2]

[3]

[2]

Figure 2-7 (rear)

[2]

Figure 2-8 (front)

2-4

CHAPTER 2 STANDARDS AND ADJUSTMENTS

5)While keeping the condition of 4), tighten the positioning screw at the rear and the front of the No. 1 mirror mount [1].

[1]

Figure 2-9 (rear)

[1]

Figure 2-10 (front)

2-5

CHAPTER 2 STANDARDS AND ADJUSTMENTS

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

Making Measurements

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.

Spring gauge (CK-0054)

Holding plate

18mm

Cassette spring	Cassette

Figure 2-11

2-6

CHAPTER 2 STANDARDS AND ADJUSTMENTS

e-1. Routing the Scanner Drive Cable

Wind 1.5 times. (black cable)

Wind 7.5 times. (silvercolored cable)

Figure 2-12

2-7

CHAPTER 2 STANDARDS AND ADJUSTMENTS

e-2. Routing the Scanner Drive Cable

1. Before Starting the Work

Prepare the following:

•Mirror positioning tool (FY9-3009)

•Cable clip (FY9-3017)

•Adhesive tape

1)Set the mirror positioning tool as shown.

Figure 2-13

2)Prepare about five strips of adhesive tape (each one about 20 × 50 mm).

3)Remove the copyboard glass.

4)Disconnect the connectors (J101, J131) [1] from the DC controller PCB.

[1]

Figure 2-14

2-8

CHAPTER 2 STANDARDS AND ADJUSTMENTS

5)If the machine is equipped with an ADF, free the hook [2], and disconnect the two relay connectors [3] from the left upper stay [4].

[3]	[2]	[4]
[2]

[2] [2]

[3]

Figure 2-15

6) Remove the three screws [5], and detach the left upper stay [4].

[5]

[5][4]

Figure 2-16

2-9

CHAPTER 2 STANDARDS AND ADJUSTMENTS

7) Remove the four screws [7], and detach the lens cover [8].

[7]

[8]

Figure 2-17

2-10

CHAPTER 2 STANDARDS AND ADJUSTMENTS

2.Routing the Reversing Cable

1)Wind the reversing cables (silver-colored) [2] on the cable drive pulley [1] 7.5 times with the longer of the two on top; then, secure it in position with a cable clip [3].

[1]

Longer end

Shorter end

[2]

Face with a marking

Figure 2-18

[1]

[3]

Top view

Figure 2-19

2-11

CHAPTER 2 STANDARDS AND ADJUSTMENTS

2)Put the cable drive pulley [1] into the shaft [4], and secure it in position with an E-ring [5]. When putting the cable drive pulley into the shaft, be sure that the hook is at the front.

[5]

Hook

[1]

(front)

[4]

Figure 2-20

3) Hook the shorter end [6] on the pulley [7].

[7]

[6]

Figure 2-21

2-12

CHAPTER 2 STANDARDS AND ADJUSTMENTS

4)Lead the shorter end [6] under the No. 1 mirror mount [8] and the No. 2/3 mirror mount [9]; then, hook it on the left rear pulley [10] and the pulley [11] of the No. 2/3 mirror mount.

[11]

[9]

[8]

[10]

[6]

Figure 2-22

5)After fitting the shorter end [6] on the cable hook [12], secure its end with adhesive tape [13]. Be sure that the secured end of the cable is found where the hole in the left side plate and the tip of the cable matches.

[13][12]

[6]

Figure 2-23

2-13

+ 61 hidden pages

Canon PC800, PC900 Service Handbook

CONTENTS

D-1. Storing the Cartridge with the Packaging Seal Intact

D-2. Storing and Handling the Cartridge with the Packaging Seal Removed