Brother MFC-9120CN Toner Cartridges
Your Brother MFC-9120CN uses the TN-240 toner cartridge series, working alongside DR-240 drum units and WT-200CL waste toner bottles. We have supplied original and compatible consumables for this printer series since Jan 2010. Workplace text printing depletes black toner far quicker than colour cartridges, requiring regular single black replacements between full set updates. As demonstrated by our 4.8 Google rating, we are committed to providing premium consumable cartridges.
Real-World Page Output and Printing Cycles
TN-240 page yields are tested under ISO/IEC 19798 standards for colour laser printing. The standard TN-240BK black cartridge delivers up to 2,200 pages, while TN-240 cyan, magenta, and yellow cartridges each provide up to 1,400 pages based on standard 5% coverage.
| Cartridge Number | Type | Colour | Page Yield | Cost Per Page |
|---|---|---|---|---|
| TN-240BK | Standard | Black | 2,200 | $0.062 |
| TN-240C | Standard | Cyan | 1,400 | $0.052 |
| TN-240M | Standard | Magenta | 1,400 | $0.092 |
| TN-240Y | Standard | Yellow | 1,400 | $0.092 |
Cost Per Page = Total Cartridge Price ÷ Page Yield (at 5% coverage). Prices based on Genuine cartridges.
Save Printing Costs with Compatible Cartridges
High-volume office environments significantly cut operational expenses by opting for premium compatible TN-240 cartridges. Under Australian Consumer Law, using compatible cartridges does not void your printer warranty. Every compatible cartridge is backed by a full money-back guarantee if it does not perform to standard. Read our guide on genuine vs compatible cartridges to compare performance and value options for your workplace.
Drum Unit and Waste Container Maintenance
In addition to toner cartridges, this colour laser system requires regular replacement of its independent maintenance components. The DR-240 drum unit has an expected lifespan of 15,000 pages, while the WT-200CL waste toner bottle lasts up to 50,000 pages.
Experience Tip: Installing a new TN-240 toner cartridge does not reset the drum counter; when fitting a new DR-240 drum unit, you must manually reset the counter via the printer control panel menu to clear the reset warning.
Smart Replacements and Fast Australian Delivery
For office setups printing mostly text documents, ordering individual TN-240BK black toners keeps daily operations running smoothly without buying unnecessary colour cartridges. When all four colours run low, value multipacks offer full replenishment in a single order. Free delivery applies on all orders over $99 (conditions apply). We dispatch quickly from our national warehouse network in Sydney, Melbourne, Brisbane, Perth, and Adelaide. Browse our full range of Brother toner cartridges or review our Returns policy before ordering.
Pro Tip
If your printer displays a "Toner Low" warning while print density remains clean, removing the TN-240 cartridge and gently rocking it side-to-side horizontally five times will redistribute the internal powder and yield extra pages before replacement is necessary.
Frequently Asked Questions
Why does my MFC-9120CN show "Replace Drum" immediately after installing a brand-new TN-240 toner cartridge?
The TN-240 toner cartridge and the DR-240 drum unit are two separate components in your printer. The toner cartridge holds the fine toner powder, while the drum unit transfers that powder onto paper. Installing a fresh toner cartridge does not clear the drum unit's internal 15,000-page counter. You must manually perform a drum counter reset through the printer front control panel whenever you install a new drum unit.
Will the MFC-9120CN keep printing in black if one of the TN-240 colour cartridges is empty?
No. Brother colour laser printers require all four TN-240 cartridges (Black, Cyan, Magenta, Yellow) to contain usable toner levels to operate. If any single colour cartridge is completely exhausted, the printer locks all printing functions—including monochrome text jobs—to prevent heat damage to the physical drum assembly.
How do I know when to replace the WT-200CL waste toner bottle versus the DR-240 drum unit?
The printer control panel displays distinct alert messages for each component. The WT-200CL waste toner container collects excess unfused powder wiped during cleaning cycles and lasts approximately 50,000 pages. The DR-240 drum unit transfers image impressions and lasts around 15,000 pages. Neither part should be manually washed or emptied; replace them only when their respective system prompt appears on screen.
