Canon PC940 Support Question
Canon PC940 Support Question
Find answers below for this question about Canon PC940.Need a Canon PC940 manual? We have 1 online manual for this item!
Question posted by donsauto1 on February 8th, 2021
I Have A Canon Pc940 Copier Which Is Making A Noise Like Gears Slipping And The
The copies are coming out blurred and unreadable. What could be the cause of this ?
Current Answers
Related Canon PC940 Manual Pages
Service Manual - Page 2
... FOUND IN ADVERTISING AND OTHER PRINTED MATTER. CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN...COPIER SERVICE DEPARTMENT OF THE SALES COMPANY. Prepared by OFFICE IMAGING PRODUCTS TECHNICAL SUPPORT DIVISION
CANON INC. 5-1, Hakusan 7-chome, Toride-shi, Ibaraki 302-8501 Japan
COPYRIGHT © 1999 CANON INC. COPYRIGHT © 1999 CANON INC.
IMPORTANT
THIS DOCUMENTATION IS PUBLISHED BY CANON...
Service Manual - Page 7
... 1 GENERAL DESCRIPTION
I . Copier 1-2 B. ADF 1-8 III. Control Panel 1-15
V. ROUTINE MAINTENANCE BY THE USER 1-17
VI. Outline of Operations 2-3
D. Inputs to and Outputs from the DC Controller 2-7
CHAPTER 3 EXPOSURE SYSTEM
I . OPERATIONS 3-1 A. Controlling the Scanning Lamp 3-9
III. Exposure System 3-37
COPYRIGHT © 1999 CANON INC. SPECIFICATIONS 1-2
A. Outline...
Service Manual - Page 10
...AU JAPON) NOISE FILTER CIRCUIT DIAGRAM A-31
K. Image Adjustment Basic Procedure 11-3 B. Mechanical 11-5 B. Electrical 11-41
III. TROUBLESHOOTING FEEDING PROBLEMS 11-75 A. Copy Paper Jam.... A-1 B. CHAPTER 11 TROUBLESHOOTING
I . Making Initial Checks ....... 11-48 B. SOLVENTS/OILS A-36
viii
COPYRIGHT © 1999 CANON INC. Troubleshooting Malfunctions 11-61
V. Lamp,...
Service Manual - Page 11
..., instructions on how to operate the machine, and an outline of copying process. I. Control Panel 1-15
V.
ADF 1-8 III. Cross Section 1-13
IV. ROUTINE MAINTENANCE BY THE USER 1-17
VI. Outline 1-20
COPYRIGHT © 1999 CANON INC.
FEATURES 1-1 II. NAMES OF PARTS 1-10 A. Copier 1-2 B. IMAGE FORMATION 1-20 A. USING THE MACHINE 1-15 A. External View 1-10...
Service Manual - Page 13
...CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
1-1 Personal Copier ... considerable reduction of the ADF. ADF Type • Continuous copying is 0 sec (at all times as long as a single entity (cartridge). ...compared with the use of paper may be opened to make jam removal easy.
8. COPYRIGHT © 1999 CANON INC. Various Paper Sizes • The paper may contain...
Service Manual - Page 14
...GENERAL DESCRIPTION
II. Mechanisms Item
Reproduction Charging Exposure Copy density adjustment Development Pickup
Separation Fixing Cleaning Original ...Center reference (copyboard)
Table 1-202
1-2
COPYRIGHT © 1999 CANON INC. SPECIFICATIONS
A. CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) Copier
1. Type Item
Body Copyboard Source of light
Lens Photosensitive medium
...
Service Manual - Page 85
...step 1), turn off the power. • The lens will not come into contact when the cam gear rotates).
Figure 3-344
[2] [3]
[1]
Figure 3-345
COPYRIGHT © 1999 CANON INC. 2.
when the No. 1 mirror mount and the lens .... 4/5 mirror mount disengaged from the cam gear [2] (so that the lever will move to the Direct position.
3) Check to make sure that the tip of the lever [1] of the cam...
Service Manual - Page 127
... solenoid turns on , the spring causes the pickup roller to rotate slightly,
M1
causing the gear and the pickup roller
gear to engage. Cassette pickup solenoid drive signal (CPUSD*) Pickup clutch solenoid drive signal (PUSLD*)
Pickup clutch
SL5 Copy paper
Cassette pickup rollers
Figure 5-103 (Multifeeder type)
COPYRIGHT © 1999 CANON INC.
When the cassette pickup...
Service Manual - Page 130
...gear.
CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
noid (SL1), gear unit, and multifeeder pickup solenoid (SL4). The cam gear makes a 180° turn (approximate), causing...
SL4 Cam gear
Paper guide plate SL1
Copy paper
Spring clutch Cam gear
Control ring Claw
Lifter
Paper guide plate
Multifeeder pickup roller
Toothless section
The cam gear makes a 180&#...
Service Manual - Page 145
... Turn on the power switch; lect the multifeeder, and press the Copy Start key. 2) When the pickup gear unit has moved up as far as to prevent the pickup roller shaft... from freeing itself. Caution: When removing the pickup roller, be sure to remove the pickup roller [11]. then, se- then, make a copy using the multifeeder.
CANON...
Service Manual - Page 152
Multifeeder Assembly
1. then, make a copy using the multifeeder.
lect the multifeeder, and press the Copy Start key. 2) When the pickup gear unit has moved as far as it can, turn off the power switch. 3) Mount the multifeeder unit; Pickup gear unit
Figure 5-220
5-28
COPYRIGHT © 1999 CANON INC. then, se- CANON PC800s/900s REV.0 AUG. 1999 PRINTED...
Service Manual - Page 194
...the power switch. 3) Mount the multifeeder, and make one copy using it as the source of paper, and press the Copy Start key. 2) When the pickup gear unit assembly has moved to perform the following first:...the bottom of paper.
7-14
COPYRIGHT © 1999 CANON INC.
[7] [6]
Figure 7-312
Pickup gear unit
Figure 7-313
CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
then, se-...
Service Manual - Page 244
...
Checks and remarks
Take out the copier and the attachments from the shipping box, and check to make sure that none is missing:
• Cassette • Copy tray • Power cord •...droplets of the machine. CHAPTER 9 INSTALLATION
II.
This phenomenon is brought in copiers, can cause blank copies.
CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) UNPACKING ...
Service Manual - Page 270
... edge non-image width Decreases Increases
Table 11-201
COPYRIGHT © 1999 CANON INC. CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
11-5 Leading Edge Non-Image Width
Make adjustments so that the width is copied in Direct. Mechanical
1. Copier a. Caution: If you have performed this adjustment, be sure to adjust...
Service Manual - Page 319
...? CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) CHAPTER 11 TROUBLESHOOTING
4 The copy has uneven density. (darker at front) 5 The copy has uneven density. (lighter at front)
Cause Scanner...is still foggy, to the middle setting, and make a copy. Replace the transfer charging roller correctly.
6 The copy is mounted correctly (in reference to the middle setting? Set ...
Service Manual - Page 323
... lamp. Is abnormal noise heard from the scanner motor? Route the cable
correctly. 2.
End.
Replace the cartridge.
19 The copy has horizontal fogging. Replace the cartridge.
Clean the surface of the scanner rail with alcohol. Is the problem corrected? Check the feeding system.
11-58
COPYRIGHT © 1999 CANON INC.
Cause Scanner drive cable...
Service Manual - Page 325
Cause
Step 1
Checks Does the scanning lamp remain on ."
CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) CHAPTER 11 TROUBLESHOOTING
22 The copy is solid black.
YES/NO NO
YES
Action See "The scanning lamp fails to turn on during copying? Is the cartridge set correctly?
11-60
COPYRIGHT © 1999 CANON INC.
Service Manual - Page 331
...the push swich on the ADF controller PCB and the - NO Replace the copier's
DC controller PCB.
13 E803
Cause Malfunction
DC controller PCB. Is the problem corrected? YES End. Is the ...probrem corrected?
5V power supply
2 Set the matter to the 20VDC range, and connect the + probe to the copier ground. CANON PC800s...
Service Manual - Page 347
... 1999 CANON INC. CHAPTER 11 TROUBLESHOOTING
D.
Provides copying insurrections/indications. Detects paper in front of operations. Used for blanking exposure. Name
[1] Noise filter PCB... [9] Blanking PCB (rear)
Description Removes noise from the power supply. PCBs
[9]
[3] [4]
[1]
[7]
[8] [5]
[2] [6]
Figure 11-604
Ref. Makes an electrical connection between the machine top and...
Service Manual - Page 360
Copier
J901
1 2 3 4
Main motor M1
M
BP701
BP705
PR
+24VU GND MMD MLOCK
[120V]
H
N
FT2
FT4
FT1
FT3
J1 DS1
Door switch
JP502 JP501
J501
2 1
J501F
2 1
NF1
NOISE FILTER PCB
2 1 ...feeder
type only)
SL5 Cassette pickup solenoid
PS4 Vertical path roller
paper sensor
COPYRIGHT © 1999 CANON INC.
CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
J751 3 2 1...
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