Canon TS-302 Blinking Yellow Light: How to Disable Ink Monitor and Fix Cartridge Errors (1686, 1688, 1682, 1684)

Question:
I'm using a Canon TS-302 printer, and it won't print-just a blinking yellow light. How can I disable the ink monitor so I can continue printing?

Answer:

Understanding the Blinking Yellow Light & Ink Monitor Behavior

On Canon TS-series printers like the TS-302, the blinking or steady yellow LED is typically tied to the ink monitoring system. This system is not actually measuring ink levels, but instead uses a page-count-based estimate. Once the printer believes the cartridge is empty, it will stop printing-even if there's still usable ink inside.

There are a few key stages:

1. Low Ink Warning (Steady Yellow Light)

• When the printer reaches about 85% of its estimated usage, the LED becomes steady yellow.
• You may also see a "low ink" message on your computer.
• At this stage, you cannot disable the ink monitor yet.
• ✅ What to do: Ignore the warning and continue printing.

2. Ink Depleted (Error 1686 / 1688)

• Once the counter reaches its limit, the printer will stop and display:
  • Error 1686 or 1688: "The following cartridge has run out."
• The LED will typically be blinking yellow, and printing is disabled.

How to Disable the Ink Monitor (Critical Step)

Once you see the 1686/1688 error message, follow these steps:

1. Do NOT close the error message window on your computer.
2. Go to your printer.
3. Press and hold the STOP button (triangle icon) for 5 seconds.
4. Release the button.

This action disables the ink monitor for that cartridge, allowing you to continue printing indefinitely.

If you prefer a visual guide, you can watch this video starting at 3:15:
Watch the tutorial here (https://www.youtube.com/embed/kzQVXjbrZ5Q [https://www.youtube.com/embed/kzQVXjbrZ5Q])

After disabling:

• The cartridge light will continue blinking yellow-this is normal.
• If the blinking bothers you, you can simply cover it with a small piece of tape.

Important Limitation

You cannot disable the ink monitor before the printer declares the cartridge "empty." This is a built-in Canon restriction. So if you're still seeing a "low ink" warning, just keep printing until the error appears.

Other Possible Issues (If Printer Still Won't Work)

If your printer is not printing even after addressing the ink monitor, here are additional possibilities:

❌ Error 1682 or 1684: Cartridge Not Recognized

These errors mean:

• "The following cartridge is missing or damaged"
• "Check Ink 1682 or 1684"

Possible causes:

1. Dirty or contaminated chip contacts
2. Cartridge not seated properly
3. Damaged or incompatible cartridge

Fixes:

• Remove the cartridge and inspect the gold contact strip (electronic ribbon).
• Clean it gently with a lint-free cloth.
• Reinstall the cartridge firmly-try reseating it a few times.
• If using refilled or modified cartridges, ensure they are not physically altered too much.

⚙️ Cartridge Hard to Install or Feels Stuck

This is a mechanical alignment issue, often seen with aftermarket or modified cartridges.

Tips:

• When installing: lift upward slightly while inserting, not just pushing forward.
• When removing: press down gently before pulling out.
• If resistance is excessive, the cartridge housing or printer cover may need slight adjustment.

In some cases, users lightly sand the underside of the printer cover to improve fit, but this should be done carefully and only if you're confident.

⚠️ Modified (Spongeless) Cartridge Issues

If you've modified your cartridge:

• Over-sanding can make it sit too low, causing poor contact with the printer pins.
• This leads to recognition errors or intermittent failures.

Solution:

• Slightly adjust the cartridge or file the printer cover minimally to restore alignment.
• Ensure smooth insertion and proper chip contact.

Final Thoughts

Addressing printer issues can be a complicated affair due to the hands-on nature of the problems. Because of this, we're not able to provide remote troubleshooting, detailed step-by-step repair guidance, or real-time support for printer repairs. However, we do offer an in-person evaluation and repair service through our diagnostic facility-learn more here: BCH Printer Repair Service (https://bchtechnologies.com/printer-repair-service [https://bchtechnologies.com/printer-repair-service]).

Please note that 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 cover both full printer repairs and individual component fixes, with clear instructions provided throughout the process. That said, we understand our services may not be the most budget-friendly option.

For faster and more cost-effective solutions, we strongly recommend exploring self-help resources. You can start with YouTube or visit our channel homepage here: BCH Technologies YouTube Channel (https://youtube.com/@bchtechnologies [https://youtube.com/@bchtechnologies]). Use the search icon next to the "About" tab to find videos on your specific issue. With hundreds of videos created over the years, this is the quickest way to locate relevant guidance. YouTube may also suggest helpful content from other creators.

Thank you again for reaching out and for your continued support. We truly appreciate it, and we're here to help however we can.