Brother MFC-L3780CDW: find the official driver route, checked connection details, 0 model-scoped error entries and 1 confirmed US part relationships. Unknown fields stay unknown.
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What is verified for this exact model?
Brother MFC-L3780CDW is listed in US-market manufacturer evidence. A blank specification is shown as “Not verified,” never as unsupported.
| Capability | Evidence status |
|---|---|
| Wi-Fi | Verified supported |
| Wi-Fi bands | 2.4 GHz / 5 GHz |
| Ethernet | Verified supported |
| USB | Verified supported |
| Scan | Verified supported |
| Fax | Verified supported |
| Automatic duplex | Verified supported |
| Wi-Fi Direct | Verified supported |
| AirPrint | Verified supported |
Ethernet is supported in the cited model data. Use the printer's own RJ45 port for a direct network setup; sharing a USB printer from a PC is a separate route.
Wireless networking is supported. Check the printer's exact setup menu and the router settings before changing saved network configuration.
Scanning is a separate function from printing. If printing works but scanning does not, install or select the exact model's official scan software.
Get the official driver safely
This is the exact model support page. The route is not an installer file or a claim about Windows 11 or macOS compatibility.
Brother's US specification says macOS printing uses AirPrint and that a separate Mac printer driver is not provided. Optional Mac utilities may still appear in the support selector.
- Check the full model label, including any suffix.
- Select the correct Windows architecture or macOS version on the manufacturer site.
- On Windows, choose the package that matches the required print or scan function. On macOS, add the printer with AirPrint and inspect optional Brother utilities separately.
- Install or add the printer in the OS, then print a test page.
Model-specific setup and maintenance
No model-specific setup procedure is verified here yet. Use the official support finder above.
Verified messages and error codes
No model-scoped error procedure is verified in the current source package. Use the exact message in the manufacturer's support search.
Ink, toner, drum and maintenance parts
These part numbers are from model-specific official compatibility records checked on 2026-11-01. They do not confirm third-party cartridges, a seller, pack contents, or subscription eligibility. Diagnose the problem before replacing anything.
| Official part number | Component | Color |
|---|---|---|
| TN229XXLBK | Toner | Black |
If replacement is confirmed
These paid links open Amazon searches for the OEM numbers above. They do not identify an approved seller, current stock or a compatible third-party cartridge.
Brother TN229XXLBK · Toner
Search results are not a compatibility or seller endorsement. Check the exact item before ordering.
(paid link)
Search Brother TN229XXLBK on AmazonOfficial sources
These links identify the source and its scope. Check the manufacturer page again before changing a printer setting or buying a part.
- Brother — MFC-L3780CDW US specification Checked 2026-11-01; official full page
- Brother — Brother official driver/model support entry Checked 2026-11-01; official full page
- Brother — TN229XXLBK compatible products Checked 2026-11-01; official full page
Useful next steps
Found a mismatch? Request a correction with the public source URL and exact model, without passwords or full serial numbers.