Several sections of a copy or print are blank.

This tip works on all Canon Imageclass 6500 series machines including the MF6500 MF6530 MF6531 MF6540 MF6550 MF6560 MF6580 MF6590 and MF6595.
First of all if you are experiencing blank copies and or prints the best thing to do is try a different toner cartridge. In rare cases the black copies/prints CAN be caused by a defective cartridge. In MOST cases it is caused by a broken or detatched laser shutter lever or arm. When a toner cartridge is inserted and the door closed, a small plastic arm opens the laser shutter. If this arm is broken or has become disconnected then the shutter is not opened. This blocks the laser from writing the copy or print image onto the drum and this results in no print being applied to the paper. 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.