Brother HL-L6400DW Toner Cartridges
Your Brother HL-L6400DW uses the TN-3420, TN-3440, TN-3470 toner cartridge series and DR-3425 drum unit. Supplying Australian workplaces with reliable printing supplies since May 2016, we maintain efficient document output for high-volume operations. Transitioning from standard TN-3420 cartridges to high-yield TN-3440 or super high-yield TN-3470 options significantly reduces how often staff must swap consumables during heavy print runs. Our 4.8 Google rating is built on dependable cartridge performance and uncompromising product quality.
Real-world document capacity and ISO standards
Standard TN-3420 black toner outputs 3,000 pages, high-yield TN-3440 delivers 8,000 pages, and super high-yield TN-3470 reaches 12,000 pages under ISO/IEC 19752 testing conditions. Dense text layouts or heavy graphic coverage will result in lower overall page yields.
| Cartridge Number | Type | Colour | Page Yield | Cost Per Page |
|---|---|---|---|---|
| TN-3420 | Standard | Black | 3,000 | $0.058 |
| TN-3440 | High Yield | Black | 8,000 | $0.037 |
| TN-3470 | Extra High Yield | Black | 12,000 | $0.027 |
Cost Per Page = Total Cartridge Price ÷ Page Yield (at 5% coverage). Prices based on Genuine cartridges.
Separating the drum unit from toner replacement
This monochrome system relies on a standalone DR-3425 drum unit designed to last approximately 50,000 pages, outlasting multiple toner changes before requiring a complete unit swap.
Experience Tip: If your printer continues showing a drum replacement warning after installing a new drum unit, open the front door and hold down the OK button until the reset message appears.
Operational savings with compatible cartridges
Choosing compatible TN-3470 toner cartridges helps commercial offices maintain continuous print operations while cutting per-page expenditures. Under Australian Consumer Law, using compatible cartridges does not void your printer warranty. Read detailed comparisons in our guide on genuine vs compatible cartridges.
Dispatch networks and ordering strategies
Offices generating heavy daily paperwork gain the lowest per-page cost by selecting super high-yield TN-3470 cartridges or multi-packs. Compatible options carry a full money back guarantee for reliable daily performance. Free delivery applies on all orders over $99 (conditions apply). Orders ship directly from local fulfilment centres across Sydney, Melbourne, Brisbane, Adelaide, and Perth. Explore our complete catalogue of Brother toner cartridges or check our clear returns policy prior to placing an order.
Pro Tip
Heavy print setups achieve maximum efficiency by loading super high-yield TN-3470 cartridges, which offer four times the page capacity of standard TN-3420 cartridges to minimise maintenance downtime.
Frequently Asked Questions
Can I install a super high-yield TN-3470 cartridge into a drum that previously held a TN-3420?
Yes, standard TN-3420, high-yield TN-3440, and super high-yield TN-3470 toner cartridges share identical physical outer dimensions and fit into the exact same DR-3425 drum housing.
Why does the printer request a drum replacement when a fresh toner cartridge was just inserted?
The TN series cartridges hold the black toner powder, while the DR-3425 drum unit transfers the image to the page; these are distinct physical components with separate lifespans.
How do I clear vertical black lines appearing down printed pages?
Slide the green primary corona wire tab back and forth along the DR-3425 drum unit several times to remove excess toner dust before clicking the tab back into its original home position.
