What Toner Does the Brother MFC-L3780CDW Use?

Quick answer: The Brother MFC-L3780CDW uses the TN229 toner family in four colors — black, cyan, magenta and yellow — with TN229XL and TN229XXL high-yield versions available. It also uses a separate DR229CL imaging drum, which is replaced far less often than the toner.

Toner and drum are two different parts on this machine. That is the single most common source of confusion, and the most common unexpected cost.

The toner, pictured

• TN229XL 4-packBlack + Cyan/Magenta/Yellow
• TN229XL BlackHigh yield · ~3,000 pages
• TN229XL Cyan~2,300 pages
• TN229XL Magenta~2,300 pages
• TN229XL Yellow~2,300 pages

Our own compatible toner, photographed in-house.

Brother MFC-L3780CDW supplies at a glance

Yields are ISO/IEC 19798. Brother lists the in-box starter set for this model as roughly 2,300 pages black and 1,200 pages per color — generous by starter-cartridge standards, though worth checking against your own packaging.

Which yield should you buy?

The MFC-L3780CDW is one of the few models in this family where the XXL is offered, and on a 31 ppm office multifunction it is usually the right call. Going from TN229 to TN229XXL triples the black yield and more than triples color, for nowhere near triple the price.

Buy standard TN229 only if the machine is very lightly used, or if you want to spread the cost of four colors rather than buying a full high-yield set at once.

Don't forget the DR229CL drum

Because the drum is separate, "Replace Drum Soon" on the display is not a request for toner. You will typically replace toner several times before the drum reaches its ~20,000-page life. After fitting a new drum you must reset the drum counter from the control panel, or the warning keeps returning.

The upside of a separate drum is diagnostic: if print quality degrades, you can work out whether the toner or the drum is responsible instead of replacing an expensive combined cartridge and hoping.

How to replace the toner

1. Open the front cover and let the machine finish any cooling cycle.
2. Pull out the drum unit and toner cartridge assembly as one piece, using the green handle.
3. Push down the green lock lever beside the color you are replacing and lift that toner cartridge out of the drum.
4. Unbox the new cartridge, rock it gently side to side five or six times, and remove the protective cover.
5. Slide it into the matching slot in the drum unit until it clicks and the lever lifts on its own. The slots are color-keyed — do not force one.
6. Clean each of the four corona wires by sliding the green tabs left and right several times, then return every tab to its home position.
7. Reinstall the assembly and close the front cover.

Troubleshooting an MFC-L3780CDW

• Vertical streaks or a repeating colored line. Clean the corona wires with the green sliders first — a tab left out of its home position is a very common cause. If it persists, suspect the drum rather than the toner.
• Color registration drifting or washed-out color. Run the machine's color calibration and registration routines from the control panel. This matters more on a four-color laser than people expect.
• "Replace Toner" on a cartridge that still feels heavy. Brother counts pages rather than weighing toner. Reseating sometimes clears a premature warning, and Continue Mode will keep the machine printing past the empty message.
• "Replace Drum Soon." That is the DR229CL, not the toner — and remember to reset the counter after fitting one.
• Third-party toner and firmware. In March 2025 some users alleged that a Brother firmware update degraded behavior with third-party toner, particularly around color calibration. Brother publicly denied it, stating that its firmware updates do not block third-party ink and toner. The claim was never independently established. Many owners still choose to disable automatic firmware updates as a precaution — a reasonable hedge rather than a proven necessity.

Which printers use TN229 toner?

• HL-L3220CDW, HL-L3280CDW, HL-L3295CDW, HL-L3300CDW
• HL-L8245CDW, MFC-L8395CDW
• MFC-L3720CDW, MFC-L3765CDW, MFC-L3780CDW

All of these also share the DR229CL drum. One caveat: TN229XXL is not offered for every model in the family — the MFC-L3780CDW is one that does take it, but the HL-L3280CDW, for example, does not. Check your model before ordering XXL.

What MFC-L3780CDW owners ask

These are the questions that come up most for this printer on retailer Q&A pages, Brother's support pages and owner reviews, answered in our words.

Can I use TN229XXL in this printer?

Yes. Brother lists TN229XXL for only four printers: the MFC-L3780CDW, HL-L3295CDW, HL-L8245CDW and MFC-L8395CDW. The rest of the TN229 family tops out at TN229XL.

Are there other parts to replace besides toner and the drum?

Yes, eventually. The WT229CL waste toner box and the BU229CL belt unit are each rated for about 50,000 pages, so most home offices will rarely need them.

What does genuine Brother toner cost for it?

When we checked Brother's site, TN229BK black was $79.79, TN229XLBK $96.29 and TN229XXLBK $128.29. Each TN229XXL color was $161.29, and the DR229CL drum was $187.99.

Does it scan both sides of a page in one pass?

Yes. The 50-sheet document feeder scans both sides at once, at up to 58 images per minute in black and 34 in color.

How much printing is it built for?

Brother recommends up to 4,000 pages a month, with a maximum duty cycle of 50,000 pages a month.

MFC-L3780CDW quirks worth knowing

• Brother's TN229XXL color page gives two numbers: 4,000 pages, and "up to 4,500" for select models. The ISO figure for each XXL color is 4,000.
• The drum's rating depends on job length. Brother rates the DR229CL at about 20,000 pages at one page per job and about 30,000 at three pages per job.
• It has a built-in NFC card reader for badge sign-in, along with Gigabit Ethernet and dual-band Wi-Fi.
• The WT229CL waste toner box is shared with Brother's larger color lasers, including the HL-L8430CDW, MFC-L8930CDW and MFC-EX575, so it is a common part.

FAQ

What toner does the Brother MFC-L3780CDW use?

TN229 standard, TN229XL high-yield or TN229XXL super-high-yield toner in black, cyan, magenta and yellow, plus a DR229CL drum unit.

Is the drum included with the toner?

No. The DR229CL is a separate part rated for around 20,000 pages, so you will replace toner several times before you need one.

Can I use TN227 or TN223 toner instead?

No. Those belong to the previous HL-L3210/L3270 generation. The MFC-L3780CDW uses the TN229 family only.

How many pages does TN229XXL print?

About 4,500 pages black and 4,000 pages per color, at ISO coverage.

Does Brother firmware block third-party toner?

Brother says it does not. Allegations to that effect in early 2025 were denied by Brother and never independently corroborated. Disabling automatic firmware updates is a common precaution among owners who use compatibles.

Why is my color output off after changing toner?

Run color calibration and registration from the control panel, and check that all four corona-wire sliders are back in their home positions.

Other printers that use TN229 toner

Brother HL-L3280CDW · Brother MFC-L3720CDW · Brother HL-L3220CDW

More Brother ink guides: Brother DCP-L2640DW · Brother MFC-L2820DW · Brother HL-L2460DW · find any printer

Replacing it? Our highest-rated alternatives

• Brother HL-L2460DW — CastleScore 90
• Brother MFC-L2820DW — CastleScore 90
• Brother HL-L5210DW — CastleScore 89

Sources

Ratings and prices were checked on October 8, 2026 and will change over time.

• Brother MFC-L3780CDW product page
• Brother TN229XXL black page (compatible models)
• Brother DR229CL drum page
• Brother WT229CL waste toner box page
• Michael Tsai: Brother denies blocking third-party toner
• Argecy MFC-L3780CDW specs (duty cycle, color yields)