Canon PC940 Support Question
Canon PC940 Support Question
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Question posted by Patrishr on April 7th, 2023
I Am Hearing A Grinding Sound When I Try To Use The Copier.
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Current Answers
Answer #1: Posted by SonuKumar on April 7th, 2023 10:59 PM
SonuKumar
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If you are hearing a grinding sound when trying to use your Canon PC940 copier, it is likely that there is an issue with the machine's internal components. Here are a few possible causes of this problem and some steps you can take to resolve it:
- Paper Jam: A paper jam is a common cause of grinding sounds in copiers. Check the paper feed area and the output tray for any paper that may be stuck. If you find any jammed paper, remove it carefully, making sure not to tear it.
- Worn-out gears or rollers: Over time, the gears and rollers in the copier can wear out, causing a grinding sound. If this is the case, you may need to replace the worn-out parts. You can refer to your copier's user manual for guidance on how to replace parts or contact a professional technician to assist you.
- Loose parts: Sometimes, loose parts inside the copier can cause grinding sounds. Check for any loose screws or other components and tighten them if necessary.
- Dirty or faulty drum unit: The drum unit is an essential component of the copier that transfers toner onto the paper. If the drum unit is dirty or faulty, it can cause grinding sounds. Try cleaning the drum unit, or if it is damaged, you may need to replace it.
If none of the above steps resolve the issue, it may be best to contact a professional technician to diagnose and repair the problem with your Canon PC940 copier.
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Sonu
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Answer #2: Posted by Aman25 on April 7th, 2023 11:42 PM
Aman25
Member since:
March 26th, 2023 Points: 7,690
Member since:
March 26th, 2023 Points: 7,690
A grinding sound in the Canon PC940 copier could indicate a few possible issues. Here are a few things you can try:
- Check for paper jams: A paper jam can cause the gears to grind against each other, resulting in a grinding sound. Check for any paper jams and clear them if necessary.
- Clean the scanner glass: If there is dirt or debris on the scanner glass, it can cause the scanner head to get stuck and make a grinding noise. Clean the scanner glass using a soft, lint-free cloth and some glass cleaner.
- Check the toner cartridge: A toner cartridge that is not installed correctly or is empty can cause a grinding noise. Remove the toner cartridge and check that it is properly installed and not empty.
- Check the drum unit: A worn-out drum unit can cause a grinding sound. Remove the drum unit and check for any signs of wear or damage. If the drum unit is worn out, it will need to be replaced.
If none of these solutions work, it may be best to have a professional technician take a look at the copier to diagnose and fix the issue.
Related Canon PC940 Manual Pages
Service Manual - Page 2
...IN THE FIELD. ANY QUESTIONS REGARDING INFORMATION CONTAINED HEREIN SHOULD BE DIRECTED TO THE COPIER SERVICE DEPARTMENT OF THE SALES COMPANY.
SPECIFICATIONS AND OTHER INFORMATION CONTAINED HEREIN MAY VARY...MATTER.
COPYRIGHT © 1999 CANON INC. Printed in Japan Imprimé au Japon
Use of this manual should be strictly supervised to avoid disclosure of confidential information. Prepared ...
Service Manual - Page 7
...3-2 C. Exposure System 3-37
COPYRIGHT © 1999 CANON INC. NAMES OF PARTS 1-10 A. USING THE MACHINE 1-15 A. IMAGE FORMATION 1-20 A. Basic Sequence of Electrical Circuitry 2-2 C. ADF ... OPERATIONS 3-1 A. Controlling the Scanning Lamp 3-9
III. Scanner Drive Assembly .... 3-13 B. Copier 1-2 B. BASIC OPERATIONS 2-1 A. Outline 1-20
CHAPTER 2 BASIC OPERATION
I . EXPOSURE SYSTEM...
Service Manual - Page 11
USING THE MACHINE 1-15 A. CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) SPECIFICATIONS 1-2
A. Copier 1-2 B. Outline 1-20
COPYRIGHT © 1999 CANON INC. NAMES OF PARTS 1-10 A. CHAPTER 1 GENERAL DESCRIPTION
This chapter provides specifications of the machine, instructions on how to ...
Service Manual - Page 13
... Copier with a Zoom Function and a Fixed Copyboard • You can choose either a default enlargement/reduction ratio or any ratio between A4 (LGL) and A5 (STMT) (*Using the...room temperature), enabling speedy copying work .
6. CHAPTER 1 GENERAL DESCRIPTION
I. Ecology-Conscious • The use of paper (500-sheet cassette + multifeeder; multifeeder type).
7. Separate top unit • The ...
Service Manual - Page 14
... Flat heater Blade Center reference (copyboard)
Table 1-202
1-2
COPYRIGHT © 1999 CANON INC. CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) Copier
1. CHAPTER 1 GENERAL DESCRIPTION
II.
Service Manual - Page 207
See Figure 8-101 for an outline of the feeding route. CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
8-1 CHAPTER 8 ADF
I. ADF
Original tray
Copier
Figure 8-101
COPYRIGHT © 1999 CANON INC. ADF
A.
Outline
The ADF picks up the originals stacked on the original tray starting with the topmost original, moves them through the copyboard, and delivers them.
Service Manual - Page 208
... to drive the motor at such times as programmed in serial. (It does not use an IC for communications.)
[Input block]
[Control block]
[Output block]
Sensor Switch
ADFcontroller PCB
CPU (Q1)
ROM (Q2)
24V 5V
Motor
Serial communication
Copier
Composite power supply PCB
Figure 8-102
8-2
COPYRIGHT © 1999 CANON INC. CHAPTER 8 ADF...
Service Manual - Page 209
CHAPTER 8 ADF
2. Inputs to and Outputs from the ADF Controller PCB a. Figure 8-103
COPYRIGHT © 1999 CANON INC.
J114
J202
J2
Serial communication
Copier
*Negative logic.
Inputs to and Outputs from the ADF Controller PCB (1/1)
ADF switch
MS1
Delivery sensor PI1
+24V J6-1
ADF controller PCB
-2
ADFC
When ADF ...
Service Manual - Page 220
... 8-121 is a diagram of these two signals. (Table 8-102 shows how the pickup motor rotates for the pickup motor (M2). The CPU (Q1) on the copier and stop the pickup motor at the same time.
ADF controller PCB +24V
Q1 CPU
PM1 PM0
Q5 Motor driver
PMRD1 PMRD1*
Pickup motor
M2...
Service Manual - Page 244
... the machine.
Unpacking and Installation
Step 1
2
Work
Checks and remarks
Take out the copier and the attachments from the left of water tend to form on its surface. A. ...Shipping attachment [1]
You will be storing the shipping attachment [1] inside the machine in copiers, can cause blank copies.
This phenomenon is missing:
• Cassette • Copy tray •...
Service Manual - Page 262
... of 1500 lux (general lighting) for 5 min and then left alone in mind:
Caution: 1. e. f. g. Try leaving the machine alone as long as by opening the shutter for a long time, however, copies can start to...drum is as strong as a means of the machine for 5 min, it should recover so that it using solvents.)
d. CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
10-5 Do not...
Service Manual - Page 267
...The symbol "+" indicates the terminal to which you will find the following instructions when checking the voltage using a meter: "measure the voltage between J109-1 (+) and -2 (-) on the DC controller PCB." ...YES Rest omitted.
• Often, you are expected to the
NO
power outlet? is not the copier's. YES
Connect the plug.
2
Are the front door and the delivery cover
NO
Close the door
...
Service Manual - Page 270
Copier a. Caution: If you have performed this adjustment, be sure to adjust the image leading edge margin.
2.0 ± 1.5mm
Figure 11-201 1) Turn VR105 on the ...
Service Manual - Page 314
... shake it must know that it several times.
CHAPTER 11 TROUBLESHOOTING
8. Cartridge
When the cartridge starts to run out of toner, copies will start to use the cartridge, but the user must be replaced with a new cartridge soon. • If the copies are not normal, Replace the new cartridge.
CANON PC800s...
Service Manual - Page 318
... it 0Ω? Is the problem corrected? Replace the transfer charging roller.
1. Inform the user that using non-recommended paper may be in a short time to make a check in contact with a metal ...(IMPRIME AU JAPON)
11-53 Turn off the power in the middle of storage.
2.
Try fresh copy paper. Measure the electrical resistance on the correct method of a copying run, and open ...
Service Manual - Page 321
...
12 The copy has white spots. (horizontal)
Cause Copy paper
Step
Checks
1 Is the paper of a recommended type?
2 Try paper fresh out of toner. Is the problem corrected? Check the cartridge
for foreign matter. 2. Adjust the tension of the paper... (IMPRIME AU JAPON)
Scanning lamp, Developing bias
YES/NO YES
YES Yes
NO
Action Try a recommend type. YES/NO NO YES
YES NO
Action Go to...
Service Manual - Page 322
... plate VR104
Solenoid (SL2), DC controller PCB Copy paper
Registration clutch
Step 1
2
3 4
5
Checks Make copies using the cassette and manually. YES End.
(p. 11-6) Is the problem corrected? Check the solenoid
(SL2) operate normally?
(SL2).
2. NO Try a recommended
type.
Check the fixing film and the fixing lower roller for scratches. See "The fixing...
Service Manual - Page 341
... the source of storing paper.
Is the problem corrected? YES/NO
Action
NO Go to use recommended paper. NO See "The registration roller fails to rotate." Is the copy paper curled... normally?
Does the vertical path roller paper sensor operate normally? YES Replace the copy paper.
Try paper recommended by Canon.
Instruct the user on the correct method of paper in question. NO...
Service Manual - Page 342
... in the feeding assembly? Replace the paper.
Check the spring used to use recommended paper.
Is the problem corrected? YES Instruct the user on...-77 CHAPTER 11 TROUBLESHOOTING
2 Separation/Feeding Assembly
Cause Copy paper
Feeding assembly
Step 1
2
3
Checks Try paper recommended by Canon.
YES Clean the static eliminator. Check the spring clutch of registration assembly
YES/...
Service Manual - Page 343
... the paper of a type recommended by Canon? Is the copy paper wrinkled or found askew? Try fresh paper. Try paper of a type recommended by Canon. Is the inlet guide soiled with solvent.
11-78
... JAPAN (IMPRIME AU JAPON) Is the problem corrected? Ask the user to use recommended paper. Ask the user to use recommended paper.
Push down the copy paper inside the cassette. YES/NO NO...
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