Question about Canon PC-940 Black and White Copier

1 Answer

Canon PC940 Problem

My Canon PC940 copier prints all black copies. It is lightly used and about 3 years old. I changed the toner cartridge and the problem persists. Cannon support suggests that condensation would cause this and I should leave the machine open for 2-3 hours. We did so and the problem remains the same. Has anyone experienced this and found a solution? Any suggestions or help would be sincerely appreciated.

Posted by on

  • Anonymous Apr 16, 2009

    eo lights up copier automatically shuts off when turned on

  • GLPF Apr 16, 2009

    Prints all black or almost all black copies, no matter the contrast adjustment. Also makes a crackling sound as it runs the paper through.

    Replaced toner cartridge and still has problem. Old cartridge has toner sifting out 1 end when I move it. New toner cartridge so far does not have toner sifting out and is making copies w/ large black lines/patches, it is still making the crackling sound.



1 Answer

  • Level 1:

    An expert who has achieved level 1.


    An expert that hasĀ over 10 points.


    An expert whose answer gotĀ voted for 2 times.

    Problem Solver:

    An expert who has answered 5 questions.

  • Contributor
  • 14 Answers

You could have a broken exposure lamp. Does the scan bar light up when you make a copy? If not that is the problem. You might also ck the contacts on the machine where they touch the toner cartridge. The toner cartridge opens a shutter to the drum when you slid it into the machine and that may be broken.

Posted on Feb 13, 2008


1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.

Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.

Here's a link to this great service

Good luck!

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

Getting light print on b&w, changing density makes zero change. Toner changed, no effect.

Check whether you are running as Black and White or Gray Scale. Many printers only print straight black by using all four toner cartridges- Cyan, Magenta, Yellow, black. If are running colored print in black and white and u choose grey scale it will automatically give you a screened image as a light print.

Mar 27, 2015 | Office Equipment & Supplies

1 Answer

Toner spots on copies. same location each copy

if the spots stay in the same location, its 100% something on the glass or on the platen cover.

Feb 14, 2015 | Canon Pc940 Alog Copier 13cpm 0008a040

1 Answer

Printer is printing to light for my needs...has a new toner

Verify the toner cartridge.Open the glass platen cover and make a copy,not used an original,if the cpy is a full black papier thr toner density is OK,Clean the polygon unit glass.Enter in program and perform a test page.

Apr 04, 2013 | Canon MF6530 Black and White Copier

1 Answer

How do you change the toner in a Canon PC940 copier?

You have to replace the whole toner/drum unit cartridge. There is handle on the left side. Release this and then the whole reader section of the copier will move left. Raise the right side cover asnd below this is the drum cartridge. Gently lift out and replace it with a new one.

Jun 03, 2011 | Canon PC-940 Black and White Copier

1 Answer

What causes a white streak and faded print to appear on copies?

Most often on the PC940 this means your toner cartridge is getting low on toner. To prove this is the cause, just remove the toner cartridge and while keeping it relatively level, shake it side to side a few times. This will re-distribute the remaining toner in the cartridge. Re-install and make a copy. The black streak/faded copy should be much better. If so then I would go ahead and get a new cartridge on the way.
Thank You for using Fixya.
Testimonials are always appreciated!

Oct 21, 2010 | Canon PC-940 Black and White Copier

1 Answer

I want a service manual for my canon pc940 copier

Just installed a new cartridge. Made one copy. worked great.
Went to make a copy today. All Black. Thought about it. Tried again and noticed lamp was not lighting. Before you say DUH! is the lamp out or is their extenuating circumstances preventing the lamp from lighting during a copy. The table top moves and everything else seems to work accordingly.

Sep 27, 2010 | Canon PC-940 Black and White Copier

2 Answers

Our copies are streaky like the drum is not clean.... help! There is black streaks on the top of all of our copies on our canon imagerunner 3300.

A) Black Streaks, Shadows, And Ghosting
Adjust the printer's lightness/darkness setting to 2-3 different variables and see if problem disappears. Look at the fusing assembly - is the roller torn or does it have any black buildup? Use caution!!! It gets HOT!

Try another toner also.

Feb 17, 2010 | Canon imageRUNNER 3300 All-In-One Laser...

1 Answer

Toner is jam and will not come out.

Generally with a PC940 you must rotate the old toner cartridge clockwise to get it out.When you put in the new one, after pulling the tape off turn it counterclockwise to get it to work.Good Luck

Mar 17, 2009 | Canon PC-940 Black and White Copier

1 Answer

Pc940 faded centre

Have you replaced the drum cartridge yet? Or did you and this what you are getting. If the old drum was working ok, but dark. You may have a defective drum unit.

Feb 06, 2009 | Canon PC-940 Black and White Copier

1 Answer

Canon PC940


Nov 30, 2007 | Office Equipment & Supplies

Not finding what you are looking for?
Canon PC-940 Black and White Copier Logo

576 people viewed this question

Ask a Question

Usually answered in minutes!

Top Canon Office Equipment & Supplies Experts

old marine
old marine

Level 3 Expert

2188 Answers

Donald DCruz
Donald DCruz

Level 3 Expert

17130 Answers

Les Dickinson
Les Dickinson

Level 3 Expert

18425 Answers

Are you a Canon Office Equipment and Supply Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides