Canon PIXMA TS5320 Error 7700 After Refilling Ink Cartridge - Causes, Fixes, and Best Practices

Question:

I'm following up regarding my Canon PIXMA TS5320. Recently, I noticed streaks in my prints and that the blue color wasn't showing properly, so I refilled the cartridge. After reinstalling it and turning the printer on, I tried to run a nozzle check but immediately got an Error 7700, telling me to shut off the printer and go to a service center.

I've had issues with this printer before, and I believe I fixed it previously by replacing the cartridge with a new Canon one. Is there anything else I can try this time?

Also, how does the printer know that I've refilled the cartridge? Do the chips expire?

What would be my best option going forward?

Answer:

Understanding Canon Error 7700

The Canon Error 7700 is a critical cartridge-related error, and it typically indicates that the printer has detected a serious issue with the installed cartridge-either electrical or thermal.

In your case, since the error occurred immediately after installing a refilled cartridge, the issue is very likely tied to the cartridge itself.

Why This Happens After Refilling

Canon cartridges like the PGI-261XL / CLI-261XL are not designed for multiple refill cycles, and several failure points can occur:

1. Electrical Contact Issues

• Ink, residue, or even slight glue contamination can interfere with the gold contact strip (electronic ribbon).

• The printer communicates with the cartridge through these contacts. Any disruption can trigger errors like 7700.

What to try:

• Remove the cartridge.

• Gently clean the gold contacts using a lint-free cloth or paper towel.

• Inspect the printer's internal pins (brass contacts) and ensure they are clean and dry.

• Reinstall the cartridge and try reseating it a few times.

2. Internal Cartridge Failure (Most Common)

Inside every Canon cartridge is a thermal printhead system. The printer:

• Sends current through the nozzles to heat them.

• Uses a reference resistor to compare expected resistance vs. actual resistance.

If:

• Too many nozzles are burned out, or

• The resistance readings fall outside acceptable ranges

...the printer flags the cartridge as defective and may trigger Error 7700, effectively locking it out permanently.

Unfortunately, once this happens, the cartridge cannot be recovered.

3. **How the Printer "Knows" It's Been Refilled

This is a great question.

The printer doesn't directly detect "refilling," but it monitors:

• Ink usage via chip tracking

• Electrical health of the printhead

• Thermal behavior of the nozzles

There are two key things at play:

a. Chip Behavior

• The cartridge chip tracks ink usage.

• It doesn't reset when you refill.

• Once it reads "empty," the printer may continue working only if you override warnings-but the chip itself doesn't "expire" in a timed sense.

b. Physical Wear

• Each use degrades the printhead.

• Refilling doesn't restore worn or burned-out nozzles.

• Over time, the printer detects abnormal electrical behavior and rejects the cartridge.

Why Replacing with a New Canon Cartridge Works

When you install a brand-new OEM cartridge, you're getting:

• A fresh chip

• Fully functional nozzles

• Correct resistance readings

That's why your previous fix worked-it eliminated all possible internal faults.

Best Options Moving Forward

Here are your most practical paths:

✅ Option 1: Replace with a New OEM Cartridge

• Most reliable fix for Error 7700

• Immediate restoration of functionality

✅ Option 2: Use "Virgin Empty" Cartridges for Refilling

• Search eBay using terms like:
  "PGI-261XL empty virgin"

• "Virgin" means:

  • Never refilled

  • Original OEM chip intact

• These perform significantly better than remanufactured cartridges

⚠️ Avoid Remanufactured Cartridges

• Often include third-party chips

• These chips can fail due to moisture or poor quality

• Can trigger errors like 7700 more easily

Final Note on Expectations

Refilling can save money, but with Canon integrated printhead cartridges, they are ultimately consumables. Even with perfect refilling technique, they will fail after a certain number of cycles.

Addressing printer issues can be a complicated affair due to the hands-on nature of the problems. As much as we'd like to help remotely, we're not able to provide step-by-step repair support from a distance. However, we do offer an in-person evaluation and repair service through our local diagnostic facility (Printer Repair Service: https://bchtechnologies.com/printer-repair-service [https://bchtechnologies.com/printer-repair-service]). Due to high demand, we operate on a first-come, first-served basis, and it may take a few weeks before we can accept your printer.

Our services are designed to repair either full printers or specific components, with clear guidance throughout the process. That said, we understand our rates may not be the most budget-friendly option. For that reason, we strongly recommend exploring self-help resources. You can visit our YouTube channel homepage (https://youtube.com/@bchtechnologies [https://youtube.com/@bchtechnologies]) and use the search icon next to the "About" section to find videos on your specific issue. With hundreds of videos created over the years, this is the fastest way to locate relevant guidance-and YouTube may also suggest helpful content from other creators.

Thanks again for your kind words and continued support. We truly appreciate you trusting us with your printer challenges, and we're always here when you need guidance.