Frequently Asked Questions

The cartridge in our printer just says TK322 — is that the complete number I should match?

Yes. TK322 is the full part number for this black cartridge, and it is the only thing you need to match. Ignore the printer's age, its serial plate and look-alike listings with extra letters — if the label on the cartridge you pulled out reads TK322, this single cartridge is the right replacement. It costs $53.35.

What actually arrives when I order this listing?

One cartridge, sealed in its own wrapping, ready to install. This is the single-unit listing — no bundle, no extras to sort out — meant for one printer that needs toner now.

Which printers does this cartridge fit?

It is built for the FS-3900D family and its network and duplex relatives: the FS-3900DN, FS-3900DTN, FS-4000DN and FS-4000DTN. Any of those models takes this same black cartridge.

What does the 15,000-page rating mean for a small office?

The rating is measured at standard test coverage — ordinary letters, invoices and reports. At a few hundred pages a week, one cartridge can run for many months; pages dense with graphics or bold shading will use toner faster and shorten that span.

Can I change it myself, or do we need a service visit?

You can change it yourself in about two minutes. Open the printer, lift the spent cartridge out, seat the new one until it sits firmly, and close the cover. No tools, no technician, and the printer is ready as soon as it warms up.

What if the new cartridge prints faint, and how quickly can a replacement get here?

First remove it and rock it gently from side to side to redistribute the toner, then print a few test pages. If the faint output continues, the cartridge is covered by a 1-year warranty with free returns for a full year, and help is available Monday through Friday, 9 AM to 5 PM CST. Orders ship from our warehouses in IL, PA, GA and CA; delivery timing is spelled out on our shipping and returns page.

What should I do with the old cartridge once the new TK322 is in?

Keep it beside the printer for the first few days. If the new cartridge's first output disappoints, the old unit is your comparison point and its label confirms the TK322 code you matched. Once the replacement is printing the way it should, the empty can go out with the office's regular recycling or waste — there is nothing to gain from storing a spent cartridge long term.

Should a one-printer office keep a sealed spare of this cartridge?

It is the cheapest insurance a small office can buy itself. A sealed TK322 stores well for months — flat, dry, and away from heat and sunlight — so having the next one already on the shelf turns a toner-out stoppage into a two-minute swap. Buy it when the current cartridge is mid-life rather than after it fades, and the FS-3900DN never has to wait on a delivery.

How can I learn how long a cartridge actually lasts in our office?

Measure it once and you will know for every future order. When you fit a TK322, write the date on the box and note the printer's page counter if it shows one; do the same when it comes out. The difference is your real yield on your real documents — letters, invoices and reports — which is a far better reorder guide than the 15,000-page test rating alone.

The printer still asks for toner right after I fitted the new cartridge. What should I check?

Start with the seating. Open the printer, lift the TK322 out, and slide it back in firmly until it sits properly, then close the cover completely — a cartridge resting slightly out of place is the usual cause of a message that will not clear. Print a few pages afterward. If the message persists and output is faint as well, contact us during support hours and the warranty route takes over.

About This Cartridge

A single black Kyocera-Mita TK322 toner cartridge for the FS-3900D, FS-3900DN, FS-3900DTN, FS-4000DN and FS-4000DTN — the plain, one-printer replacement at $53.35. It is rated at 15,000 pages, installs in minutes without tools, and is backed by a 1-year warranty and 1-year free returns.