20 Most Recent Canon imageCLASS MF6550 All-In-One Laser Printer - Page 2 Questions & Answers

Hi,Press 'Job Cancel / Status Monitor', a message shows "job cancel' then press 'OK' after that ppress the left or right arrow key to show a message 'TX / RX', then press 'OK'. Again press the left arrow key once to select 'Yes', finally press the 'Stop' button to return to the main menu.If this didn't work try installing the latest driver from hereHope this helps, thanks for using fixya.com

The scanner reader is probably bad. Canon calls it a Contact Image Sensor FK2-1377-00
This is moderately hard to install because it is under the glass.
Whit www.iteminconline.com

Hi there.

This problem is caused by a corrupted firmware in the printer. Reflashing the firmware will fix the problem, but unfortunately Canon does not provide a download for the firmware for this model so you would need to take it to a Canon Authorized Service Center to have it reflashed.

Also, you may want to unistall and reinstall the printer driver first. Uninstall the driver from Control Panel then reinstall it again. You can get the driver from here, just make sure that you choose the right operating system of your machine.

Should you wish to contact Canon in the Netherlands, please click on this link.

Thank you!

I suspect you have some corruption in the machines software and it will need a ram clear.

1) Enter service mode.

Press the operation panel user mode key, 2 key, 8 key and user mode key in this order.

2) Press the operation panel arrow keys to show "TEST MODE."

3) Press the OK key.

To exit test mode, press the user mode key to return to standby mode.

Scroll down to Clear and then to All. enter and the machine will reinitialise and remove all exisiting data. So it will be as it was when new. It will ask you what country you are in so just follow the prompts and all should be well.

click here for manual

If you use a wireless USB print server like this . Keep in mind that you may not get all functions such as scanning to work but it will allow for printing for sure. If the scanning works consider it a bonus.

I had one of these printers claiming there was a paper jam, when there wasn't. As others have suggested, three hard slaps above the paper tray, and hey presto, it works.(This seems to be the resolution to all problems. It will probably refill the cartridge too ... hmmm)

Thanks Guest with Best Solultion! OMG! I have had my machine printing blank for over a month now and reading stuff and trying to find a solution. Until finally today I found this page. I read your solution and hit the front like u said for several times and nothing. Finally, after the third try WALA...IT WORKED!!! Thanks again. If anyone has this same problem try this because it really works! Eventhough this is such a strange problem for such an expensive machine.

I have seen this fault before on the 6550. It for some reason it thinks you are updating the firmware.
I suspect you have lost the firmware in the scnt board. You will need to download it from canon's site and follow the instructions to update the firmware. It may just work. If not then the scnt board is screwed and will need replacing.

After some time the ink dries in, so you have to change the cartridge.

(Please rate if helpful!)

Hi, please get new driver here: www.driversdown.com/
www.nodevice.com/driver/company/Canon/Printer.html
www.usa.canon.com/cusa/office/products/.../hs_1200ts

Jay lqdptr

After you reinstall the toner cartridge does it print? If it remains blank you may have a stuck laser shutter. The toner cartridge needs to open the laser shutter when it is installed and sometimes the mechanism gets off kilter and needs to be straightened out.

the copies are blank the laser beam does not reach the drum, the scan operation was not performed, check the lever that lock the laser unit, if blocked release it.

I have copy and pasted this solution from another question I answered from a person with the same issue. Several people have reposnded that this solution helped them very much.
This is either your toner cartridge or more likely the plastic arm that opens the laser shutter is broken. When you insert a toner and close the access door, there is a plastic arm that opens the laser shutter. If this shutter does not open it blocks the laser and results in blank copies. If the arm is broken you CAN open the laser shutter manually and block it open. What you need to do it open the cartridge access door, remove the cartridge and look for a 1/2 inch wide slot running from left to right in the metal frame that is in the back upper section where the cartridge goes. The plastic arm that operates the black plastic shutter is on the right side. If broken you can manually lift up the shutter and "block" it open using something like a folded up scrap of paper. I know it sounds strange but I have used this repair on several of my customers machines and they have all worked fine since. If you can not find or effect the repair yourself at least you will know where to point the service person when they come out to look at it.
Good Luck and Thank You for using Fixya.

you can try uninstalling your printer then reinstalling it or remove the cartridge then replace it or go to administrive tools computer management device manager scroll to ecp printer port right click update driver
hope this helps

the lase unit windows is block. It has a metal windows that for some reason sometimes stay clouse. just but a tape to hold it up or remove LSU and take out that metal part.