topic Re: PIXMA TR4720 black printing problem in Desktop Inkjet Printers

PIXMA TR4720 black printing problem

KDarling — Wed, 04 Feb 2026 20:19:30 GMT

Prints Black type that is normal, bold, and blurry throughout the Word Document. Running Windows operating system. Is this a firmware or cartridge issue? We recently installed a new Black cartridge.

Re: PIXMA TR4720 black printing problem

DerrickL — Thu, 05 Feb 2026 04:24:51 GMT

Was it a Canon cartridge? The following may help you:

Troubleshooting Blurry Black Printing on PIXMA TR4720

Common Causes

Clogged Print Head: If the print head nozzles are clogged, it can lead to blurry prints.
Incorrect Cartridge Installation: If the FINE cartridge is not installed properly, it may not eject ink correctly.
Low Ink Levels: Insufficient ink in the cartridges can cause poor print quality.

Steps to Fix Blurry Prints

Check Ink Levels: Ensure that the ink cartridges have enough ink. Replace them if they are low.
Print Nozzle Check Pattern:
- This helps determine if the ink is being ejected properly.
- If the pattern shows missing lines or streaks, proceed to clean the print head.
Clean the Print Head:
- Use the printer's maintenance settings to clean the print head.
- If the issue persists, perform a deep cleaning of the print head.
Check Cartridge Installation:
- Remove and reinstall the FINE cartridges to ensure they are seated correctly.
- Make sure there is no orange tape left on the cartridges.
Adjust Print Quality Settings:
- In the printer driver settings, increase the print quality to see if it improves the output.

Additional Tips

Use Quality Paper: Ensure you are using the correct type of paper for printing.
Allow Printer to Rest: If the printer has been used extensively, turn it off for 24 hours to allow the print head to recover.

Re: PIXMA TR4720 black printing problem

Patrick — Tue, 10 Feb 2026 19:10:23 GMT

Hi KDarling,

Blurry printing from your PIXMA TR4720 can be caused when the encoder/timing strip inside of your printer is smudged or has debris.

To clean the encoder/timing strip, please follow the steps outlined in the following Knowledgebase Article available:

Canon Knowledgebase - Cleaning the Encoder Film - TR4720

If you continue to have difficulties, please contact one of Canon's Technical Support Representatives via phone or chat. To contact a Technical Support Representative, please use the link below to log into your My Canon account:

https://mycanon.usa.canon.com

Once logged in, click on your PIXMA TR4720 and then click on the Product Support button. When that page loads, click on either the Phone Support button or the Chat Support button to access support.

Did this answer your question? If so, please click the Accept as Solution button below so that others may find the answer as well.