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Sudipto, Engineer
Category: Printers
Satisfied Customers: 6009
Experience:  DIploma in Computer Hardware
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My pixma printer has started double line printing from the

main black ink tank. ... Show More
main black ink tank. I have tried deep cleaning and automatic plus manual head alignment.
Any ideas how to solve this please
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Hi, I'm Sudipto. Welcome to JustAnswer. I'm reviewing your question now, and will post back with your reply ASAP

The problem you are facing is caused due to two reasons, one due to dirty encoder strip and two severely clogged printhead. As you have already tried to use the automated printhead cleaning feature without any positive result, I will first recommend you to flush the printhead manually, to do that remove the printhead and then, open this LINK and follow the steps to flush the printhead.

  1. Make sure that the power is turned on, then, holding sides of the paper output tray, gently open it.
  2. Lift the operation panel open until it stops.
    The print head holder will move to ink tank replacement position.
  3. Push the tab (A) on an ink tank and lift it out of the printer.
  4. Remove the rest of the ink tanks from the holder.
  5. After all the ink tanks have been removed from the holder, press and hold the Stop button for two seconds (or longer) until the print head carriage moves to the replacement position and then release the button.
    The carriage will move to the right and then return almost centered with the front opening.
  6. Open the the inner cover (B) and push it down all the way to the bottom.
  7. Pull the Head Set Lever towards the front of the machine. You may find resistance when the bottom of the Head Set Lever hits the back of the front edge. The Head Set Lever will move forward as it slides above that front edge.
  8. Use your finger tips to grab the top of the center tab and pull out the print head. You will notice the front of the print head will drop face down as you pull it out of the machine.

If the problem persists then, open the link below and follow the steps to clean the encoder strip. If you still face the same problem then, unfortunately, the printhead is defective and you have to replace the printhead to solve the problem.