TR8520 is printing some fuzzy black text

[fix4All9]

My Canon printer (connected to a desktop Dell PC running Windows 10) recently started to print some fuzzy text on some of the lines on a page. I ran a nozzle print check and saw some blurred lines on the lower part of PBGK pattern; the color patterns looked fine. I assumed I had some debris in the PBGK portion of the print head and ran a cleaning cycle, which had no effect. I then did some manual cleaning of the print head, soaking it in a solution of 10 parts water, 2 parts isopropanol and 1 part ammonia. This had no effect on the nozzle print pattern or printed text. I did an overnight soaking of the print head in the same solution and wiped the pins contacting the print head on the printer, but the results were unchanged. I also replaced the black PBGK cartridge with a new one, with no effect.  See attached nozzle check results and sample text. I have since done a deep cleaning of the print head to no effect. I could try cleaning the timing strip, but not quite sure how to access it. Thank you, in advance, for any suggestions. 

[Danny]

Thanks for joining the conversation, fix4all9!

It looks like the attached nozzle check and sample text images didn't make it over.  Feel free to post them in a reply so that the Community can get a better idea of what you're dealing with.

If this is a time-sensitive matter, click HERE search our knowledge base or find additional support options HERE.

Thanks and have a great day!

[fix4All9]

Hi Danny,

Thanks for your response. I couldn't see how to post the nozzle print and sample text files. I saw buttons for posting photos, videos, tables and links (insert/edit link). The last button was asking for a url. How do I upload those files? Thank you.

[Danny]

The original documents used for your test prints aren't as important as the results that your printer put out.  If you post photos or scanned images of those imperfect printouts, we can figure out what's going on from that!

[fix4All9]

Here are the nozzle print and text files. The PBGK and color patterns didn't scan so well; they actually look better on the printed page. The text patterns are somewhat worse on the printed page than the scanned image. Red arrows indicate lines of fuzzy text. Thanks again for any help with this.nozzle check

sample text

[Patrick]

Hi fix4All9,

It would appear that your PIXMA TR8520 would require service.  If your PIXMA TR8520 was purchased less than a year ago, please contact one of Canon's Technical Support Representatives via phone or chat to obtain your in warranty options. 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 TR8520 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.

If your PIXMA TR8520 is out of warranty, you are eligible for Canon's Upgrade Program. This is for out of warranty units which have been diagnosed to require service, or for some reason are incompatible with a new or upgraded system. This option allows you a one-time opportunity to purchase a replacement product, discounted from the list price.

If you would like to take part in this option, please call our Sales Department at (866) 443-8002 Monday through Saturday, 9am to 9pm. Let them know you have been working with technical support and the Canon Upgrade Program was offered.

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

[fix4All9]

Thank you for the information Patrick. My TR8520 is out of warranty. The problem was with a clogged print head. Even manual cleaning didn't fix the problem of fuzzy text. I installed a new print head and the printed text is now sharp and clear.