Canon PC940 Support Question
Canon PC940 Support Question
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Question posted by nwooderson on March 26th, 2023
It Makes A Loud Clunking Noise When Its Copying
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Answer #1: Posted by SonuKumar on March 26th, 2023 7:09 PM
SonuKumar
Member since:
May 9th, 2021 Points: 16,604,590
Member since:
May 9th, 2021 Points: 16,604,590
If your Canon PC940 is making a loud clunking noise while it's copying, there could be a few reasons for this issue. Here are some troubleshooting steps you can try:
- Check for paper jams: Sometimes, the noise can be caused by a paper jam. Check the paper tray and the paper path for any jammed paper or other obstructions. Clear any jams you find before attempting to make another copy.
- Check the toner cartridge: The noise could also be caused by a faulty or improperly installed toner cartridge. Open the front cover of the printer and remove the toner cartridge. Check to see if it's damaged or leaking toner. If it is, replace it with a new one. If it's not damaged, try reinstalling it to make sure it's properly seated in the printer.
- Clean the printer: Dirt or debris can sometimes cause the printer to make strange noises. Use a soft, lint-free cloth to clean the exterior of the printer and the paper path. Make sure to clean the rollers and the paper tray as well.
- Lubricate the printer: Over time, the printer's moving parts can become dry and cause noise. Lubricate the printer's moving parts with a small amount of lubricating oil to help reduce the noise.
If none of these steps resolve the issue, it may be a mechanical problem with the printer. In that case, you may need to contact Canon customer support for further assistance or consider getting a replacement printer.
Please respond to my effort to provide you with the best possible solution by using the "Acceptable Solution" and/or the "Helpful" buttons when the answer has proven to be helpful.
Regards,
Sonu
Your search handyman for all e-support needs!!
Related Canon PC940 Manual Pages
Service Manual - Page 5
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... Universal Universal Universal 500 sheets Universal 500 sheets 500 sheets
The notation "√" indicates that the item in the following table. Copying speed (cpm) at Direct
12 12 12 10 10 10 10 10 13 13 12 12 13 10 13 13
COPYRIGHT ©...
Service Manual - Page 10
CHAPTER 11 TROUBLESHOOTING
I . Making Initial Checks ....... 11-48 B. Copy Paper Jam 11-75 B. Faulty Feeding 11-78
VI....CIRCUIT
DIAGRAM A-7 E. Sample Image Faults ....... 11-52 C. Switches 11-80 C. GENERAL CIRCUIT
DIAGRAM A-5 D. NOISE FILTER CIRCUIT DIAGRAM A-31
K. STANDARDS AND ADJUSTMENTS 11-5 A. TROUBLESHOOTING IMAGE FAULTS 11-48 A. TROUBLESHOOTING MALFUNCTIONS 11...
Service Manual - Page 13
... maximum (1/100 to make jam removal easy.
8. Various Paper Sizes • The paper may be between 70% and 141% in 1% increments.
2. ADF Type • Continuous copying is 0 sec (at 20°C room temperature), enabling speedy copying work .
6. FEATURES
1.
All-in a considerable reduction of paper (500-sheet cassette + multifeeder; Personal Copier with the use of...
Service Manual - Page 17
...120 V 60 Hz 220/240 V 50 Hz, 60 Hz
Serial number
Maximum power consumption Noise Ozone
TVBxxxxx TVCxxxxx TVDxxxxx TVExxxxx TVFxxxxx TVGxxxxx TVHxxxxx TVJxxxxx
PUDxxxxx PUExxxxx PUFxxxxx PUGxxxxx TYAxxxxx TZAxxxxx UAAxxxxx
PUHxxxxx...or less Standby: 1.2W (approx.; reference only)
Standby: -(sound power level by ISO) Copying: (sound power level by ISO) • Single-feeder type: 68 dB or less &#...
Service Manual - Page 29
b. Caution: • You cannot start feeder cleaning mode while the machine is making copies or if an error
exists. • The auto power-off mechanism does not operate while feeder cleaning mode is being
executed. COPYRIGHT © 1999 CANON ...
Service Manual - Page 104
...+ 1.56µA/2.5 kV max.) will be applied to the transfer roller. (See Table 4-103.)
Copy Start key ON
STBY INTR
SCFW
SCRV
SCFW
SCRV LSTR STBY
Main motor (M1) Cleaning bias Reference...positive component of the period in the environment. Reference: While the transfer charging roller makes a single rotation, the microprocessor (Q900) checks the transfer current detection signal four times...
Service Manual - Page 114
in its place, place five blank sheets of copy paper, and close the copyboard cover.
8) Turn VR103 on the DC controller PCB so that it... through 8) so that the values of both VR102 and VR103 are too light, go back to step 5) and make adjustments once again.
10) Make a copy, and check to make sure that the reading of its characters is good. • If it is foggy or the characters are target ...
Service Manual - Page 115
... plate
A
B
B
A
, , Photosensitive drum Non-image area in Reduce mode
A: Position of the side blanking lamp in Direct and Reduce mode B: Position of excess toner when making reduced copies.
2.
Outline The machine is moved in Reduce mode
Figure 4-122
COPYRIGHT © 1999 CANON INC.
Service Manual - Page 117
...for a long time, the photosensitive drum can develop photo memory,
which can cause white spots or black bands on copies. b.
Outline The machine's photosensitive drum, primary charging roller, developing assembly, and cleaner
are housed in the case... the machine's top unit is removed from the machine, light makes its way through the opening used
to protect the photosensitive drum from light.
Service Manual - Page 118
If you must clean it rotates when
making copies. Otherwise, the leaf spring used to apply a developing bias to the developing cylinder will recover to a level at which it , use paper, lint-free or ...
Service Manual - Page 130
...
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˚ turn (approximate), and...When the cam gear starts to move up and down the paper guide plate. The cam gear makes a 180° turn (approximate), causing the paper guide plate to rotate in response, the...
Service Manual - Page 168
... according to the following two parameters: • Temperature of the fixing heater when the Copy Start key is pressed. • Number of copies to make in continuous copying mode
Table 6-102 shows the temperature of the fixing heater when the Copy Start key is pressed (as detected by the thermistor TH1) and the temperatures to...
Service Manual - Page 182
If the reading is lower than one copy is made or while making the first copy of a continuous copying job. (It rotates when making the second and subsequent copies of a continuous copying job.)
Power switch Copy Start key ON ON
STBY INTR
SCFW
SCRV
SCFW
SCRV LSTR STBY
Main motor (M1) Scanner cooling fan (FM1) Heat exhausting fan Scanner...
Service Manual - Page 194
... While freeing the five claws [6], detach the front lower cover [7]. lect the multifeeder 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: 1) Turn on the power switch; ...unit, be sure to its upper limit, turn off the power switch. 3) Mount the multifeeder, and make one copy using it as the source of the ma-
Service Manual - Page 244
...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 • Power cord • ADF auxiliary tray (ADF type only) •... the left of water tend to make sure that none is known as "condensation" and, in step 9.
9-2
COPYRIGHT © 1999 CANON INC....
Service Manual - Page 250
... the machine.
9-8
COPYRIGHT © 1999 CANON INC.
"Placing Copy Paper.")
22 All notations on the copyboard glass, • Check to make copies to the ADF is in place.
21 Place copy paper inside the cassette. (For how, see if the operation is no abnor- mal noise. CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN...
Service Manual - Page 268
YES
Select non-AE, and set
to three copies of gray scale No. 9 2.
Check the following : 1. Density of the Test Sheet (NA-3). Composite power supply PCB (See the appropriate troubleshooting procedure.)
END
Note: 1. See p. 11-42. then, make two to the middle index?
(Note 1)
Set it at the middle. Note 2) 4. Image Adjustment Basic...
Service Manual - Page 270
Copier a. CHAPTER 11 TROUBLESHOOTING
II. Leading Edge Non-Image Width
Make adjustments so that the width is copied in Direct.
Mechanical
1. 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 ...
Service Manual - Page 323
... found at different positions? Check the scanning system. CHAPTER 11 TROUBLESHOOTING
18 The copy has a blurred image.
Replace the cartridge. Cause Scanner drive cable
Scanner rail
...noise heard from the scanner motor? Then, apply lubricant. (CK-0551) See "The scanner fails to move slowly? Check the feeding assembly for burrs.
Scanning system Feeding system
3 Make a reduced copy...
Service Manual - Page 347
...in front of operations. PCBs
[9]
[3] [4]
[1]
[7]
[8] [5]
[2] [6]
Figure 11-604
Ref. Provides copying insurrections/indications. CHAPTER 11 TROUBLESHOOTING
D. Detects the density of originals. Supplies DC power, generates high voltage, and controls the scanning lamp.
Used for blanking exposure. Name
[1] Noise filter PCB
[2] DC controller PCB
[3] Composite power supply PCB...
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