Frequently Asked Questions

Blues and greens have gone washed out. How do I check whether cyan is the culprit?

Run the printer's color test page. Cyan carries the blues and half of every green, so a pale or banded cyan block while magenta and yellow print solidly means the cyan cartridge is fading. Confirm the code on the cartridge you pull out reads TK542C — that is the cartridge this listing replaces.

Why does the exact code matter when all four colors look alike?

Each color is keyed to its own slot and the family uses four separate codes. This one is TK542C, the cyan. A cartridge ordered by family name alone can easily arrive in the wrong color, so the letter at the end of the code is the detail to check before ordering.

Can I replace only the cyan and leave the other cartridges alone?

Yes — pause the job, open the cover on the FS-C5100DN, swap just the cyan slot and resume. Black, magenta and yellow stay exactly where they were, and there is no reason to disturb a cartridge that is still printing well.

What happens if I keep printing after the cyan warning appears?

Color balance drifts further with every page — skies go gray, greens turn yellow-brown — and running a slot completely dry can mean extra cleaning cycles once the new cartridge is in. Treat the warning as the signal to order and swap promptly.

What does the 4,000-page rating mean in practice?

It is the cartridge's rated yield at standard coverage. A typical office, where color appears on a fraction of pages, often stretches a cyan cartridge across many months; a run of full-color brochures will draw it down far faster.

What cover is included with this cartridge?

A 1-year warranty with 1-year free returns under our shipping & returns policy. The cover attaches to this cyan cartridge individually, whether you buy it alone or alongside the rest of the family.

How should I store a spare cyan cartridge until the printer needs it?

Sealed in its original packaging, lying flat, in a dry place out of direct sunlight and away from heat. A compatible TK542C asks for no maintenance while it waits — the closed packaging protects the toner — so a spare bought ahead simply sits ready. When the test page shows the installed cyan fading, the replacement is already on the shelf and the swap takes minutes.

After fitting the new cyan, how do I confirm the fix actually worked?

Print the same color test page you used to diagnose the problem. The cyan block should now come out solid and even, and the pages that gave the fault away — blues, skies and greens — should be back at full depth. Comparing the before and after test pages is the surest check, because it uses the exact blocks that exposed the fading cartridge in the first place.

This printer mostly prints black and white. Does a fitted cyan cartridge suffer from sitting unused?

No. Toner is a dry powder and does not dry out the way liquid ink does, so a cyan cartridge installed in a text-heavy office simply waits, losing nothing, until color work calls on it. That is why a typical office can stretch one TK542C across many months. If early pages after a long quiet spell look slightly uneven, a few color pages usually bring the output back to normal.

What should I do with the old cyan cartridge once it is out?

Seal it in the packaging the new cartridge arrived in and add it to your office recycling for a toner collection point. Do this once the replacement has printed its confirming test page, so you know the new unit is good before the old one leaves. Keeping the spent cartridge bagged in the meantime prevents stray toner dust from marking paper or shelves.

About This TK542C Cyan Cartridge

This is the single cyan refill for the family: part number TK542C, rated at 4,000 pages and priced at $44.44. Order it when blues lose their depth and the test page shows cyan fading ahead of its neighbors. It comes from our compatible Kyocera-Mita range; orders ship from our warehouses in IL, PA, GA and CA, and support is available Monday to Friday, 9 AM to 5 PM CST if you want the code verified against your old cartridge first.