Brother MFC-9970CDW Toner Cartridges
Your Brother MFC-9970CDW uses the TN-340 and TN-348 toner cartridge series, operating alongside an independent DR-340CL drum unit. Supplying consumables for this high-volume office workhorse since Jan 2011, we understand how heavy document workflows impact individual colour levels. Our 4.8 Google rating is built on dependable cartridge performance and uncompromising product quality. Switching to high yield TN-348 black and colour cartridges drastically reduces replacement downtime during intensive print runs.
Expected Page Output and Replacement Cycles
Page yields for the TN-340 standard and TN-348 high-yield series are calculated according to the ISO/IEC 19798 standard for colour laser printing. High-volume office environments will achieve a substantially lower cost per page and fewer cartridge changeovers by opting for the high-yield TN-348 series over standard TN-340 cartridges.
| Cartridge Number | Type | Colour | Page Yield | Cost Per Page |
|---|---|---|---|---|
| TN-340BK | Standard | Black | 2,500 | $0.059 |
| TN-340C | Standard | Cyan | 1,500 | $0.099 |
| TN-340M | Standard | Magenta | 1,500 | $0.099 |
| TN-340Y | Standard | Yellow | 1,500 | $0.099 |
| TN-348BK | High Yield | Black | 6,000 | $0.041 |
| TN-348C | High Yield | Cyan | 6,000 | $0.069 |
| TN-348M | High Yield | Magenta | 6,000 | $0.069 |
| TN-348Y | High Yield | Yellow | 6,000 | $0.069 |
Cost Per Page = Total Cartridge Price ÷ Page Yield (at 5% coverage). Prices based on Genuine cartridges.
Drum Units and Maintenance Components
In addition to toner cartridges, keeping your printer operational requires swapping out separate long-life maintenance components like the DR-340CL drum unit.
Experience Tip: When installing a new DR-340CL drum unit, remember to manually perform a drum counter reset through the printer menu to clear the replacement notification.
Choosing Between Genuine and Compatible Options
To lower operational printing costs while keeping crisp document clarity, third-party cartridges serve as an exceptional alternative. Under Australian Consumer Law, using compatible cartridges does not void your printer warranty. Learn more in our detailed genuine vs compatible cartridge guide.
Managing Your Replacement Orders
If your office prints mostly black-and-white documents or text drafts, stock up on the high-yield TN-348BK black cartridge to minimise changeovers. For heavy colour printing, full set high-yield cartridges deliver superior cost efficiency. All compatible cartridges come with a risk-free money-back guarantee. Review our returns policy for full terms. Fast dispatch is available from our warehouses across Perth, Brisbane, Sydney, Melbourne, and Adelaide. Free delivery applies on all orders over $99. Explore our complete catalogue of Brother toner cartridges to reorder today.
Pro Tip
Always replace individual toner cartridges as they run low, but leave the DR-340CL drum unit in place until you notice persistent print defects like repeating lines or vertical streaking across pages.
Frequently Asked Questions
Can I run high-yield TN-348 black alongside standard-yield TN-340 colour cartridges?
Yes, you can mix TN-340 and TN-348 series cartridges in any combination. The printer tracks each toner level independently, allowing you to upgrade specific high-use colours to XL capacity without changing the rest.
Why does my printer still display 'Replace Drum' after installing a new toner cartridge?
The toner cartridge and the DR-340CL drum unit are distinct physical units. Replacing a TN-340 or TN-348 toner cartridge only refills the powder; it does not reset the drum unit counter, which must be reset manually via the front control panel when a new drum is installed.
How do page yields differ between TN-340 and TN-348 series cartridges?
Standard TN-340 black yields approximately 2,500 pages while TN-340 colour cartridges yield around 1,500 pages. High-yield TN-348 cartridges deliver up to 6,000 pages for both black and colour, significantly extending operational output between replacements.
