Brother MFC-9970CDW Toner Cartridges
Your Brother MFC-9970CDW uses the TN-340, TN-348 seres toner cartridges. Supplying premium consumables for this printer since Jan 2011, we understand small business print demands where workflow disruptions must be minimised. Businesses generally start with standard replacements but rapidly upgrade to high-yield options to manage heavy print intervals efficiently. Our 4.8 Google rating reflects a long-standing track record of premium cartridge performance.
Expected page output and replacement cycles
Page capacities are calculated based on the ISO/IEC 19798 standard for colour laser printing. In high-output small business environments, monitoring these yields across your individual colour cartridges ensures consistent print cost predictability.
| 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.
Choosing between genuine and compatible options
Under Australian Consumer Law, using compatible cartridges does not void your printer warranty. Many businesses select compatible options to reduce everyday print overheads while maintaining clear text output. You can read a full breakdown of how these alternatives compare to originals in our genuine vs compatible cartridges blog post.
Integrated drum unit maintenance
This printer relies on an independent DR-340CL drum unit to transfer toner onto the page. Experience Tip: Remember to manually reset the drum counter on your printer control panel whenever you install a new drum unit to clear the replace prompt.
Best way to stock these cartridges
If you print mainly text documents, purchasing high-yield black toners individually or selecting multi-pack bundles offers the most practical setup. Our compatible cartridges come backed by a full money-back guarantee for complete peace of mind, governed by our straightforward returns policy. For convenient local fulfilment, we ship from regional warehouses in Perth, Brisbane, Sydney, Melbourne and Adelaide. Free delivery applies on all orders over $99 (conditions apply). Explore our full range of Brother toner cartridges to keep your office running seamlessly.
Pro Tip
Always replace your toner cartridges immediately when fading occurs, but do not mistake a worn drum unit for an empty toner; a drum near the end of its 25,000-page lifespan will cause repeating vertical lines across pages regardless of toner levels.
Frequently Asked Questions
Can I mix standard TN-340 and high-yield TN-348 cartridges in my printer?
Yes, you can mix standard and high-yield versions within the same printer. Each slot operates independently, allowing you to use a high-yield black alongside standard colour toners depending on your specific usage patterns.
How do I know whether to replace the TN-348 toner or the DR-340CL drum unit?
The printer will display distinct status alerts for each separate component. Toners require replacement when the powder runs low or text prints fade, whereas the drum unit manages overall page transfer clarity and lasts significantly longer, typically up to 25,000 pages.
Why does the colour toner deplete even though I mostly print in black and white?
This printer performs routine calibration cycles that use small amounts of cyan, magenta, and yellow toner to maintain image alignment and print cleanliness, meaning colour levels will decrease gradually over time even during exclusive mono print jobs.
