The Brother MFC-L3770CDW is a compact digital color all-in-one printer, designed to elevate home office productivity with robust laser performance and versatile functionality.
Overview of the Printer
The Brother MFC-L3770CDW is a comprehensive all-in-one printer, excelling in printing, copying, scanning, and faxing capabilities. It’s a color laser printer, offering a balance between speed and quality, ideal for small to medium-sized offices or demanding home users. This model boasts a compact design without sacrificing performance, making it a practical addition to any workspace.
Included in the package are essential components like a power cable, standard black toner cartridge (yielding approximately 1000 pages), and starter color toner cartridges (cyan, magenta, yellow, also around 1000 pages each). A drum unit and software/driver CD-ROM are also provided, alongside comprehensive documentation including installation guides, safety manuals, and a warranty card. The MFC-L3770CDW is designed for seamless integration with both Windows and macOS operating systems.
Key Features and Benefits
The Brother MFC-L3770CDW delivers exceptional color printing at speeds up to 25 pages per minute. Its key benefit lies in its all-in-one functionality, streamlining office tasks. Wireless connectivity (Wired and Wireless) and mobile printing via the Brother iPrint&Scan app enhance convenience and flexibility, allowing printing directly from smartphones and tablets.
This printer features automatic two-sided printing (duplex printing), reducing paper consumption and costs; Users benefit from adjustable color settings to optimize print quality for various document types. Brother recommends using genuine Brother toner and drum units to maintain peak performance and protect the printer’s longevity. The printer’s robust build and reliable performance make it a valuable asset for consistent, high-quality output.
Target Audience
The Brother MFC-L3770CDW is ideally suited for small to medium-sized businesses and home offices requiring a versatile, color-capable all-in-one printer. It caters to professionals and individuals who frequently print, scan, copy, and occasionally fax documents. The printer’s compact design makes it suitable for environments with limited space.
Users who prioritize convenience will appreciate the wireless connectivity and mobile printing options. Those seeking cost-effective printing solutions will benefit from the duplex printing feature and the availability of high-yield toner cartridges. The MFC-L3770CDW is also a good fit for users who value print quality and reliability, making it a strong choice for producing professional-looking documents and images.

Unboxing and Initial Setup
Initial setup involves verifying package contents – printer, power cord, toner cartridges, drum unit, software CD, and manuals – before connecting power and installing drivers.
Package Contents Verification
Carefully unpack the Brother MFC-L3770CDW and verify all components are present. You should find the printer itself, a power cord to ensure operation, and a standard black toner cartridge capable of printing approximately 1000 pages. Additionally, there are starter toner cartridges in cyan, magenta, and yellow, each also rated for around 1000 pages.
A drum unit is included, essential for image quality and longevity. A CD containing the necessary software and drivers for both Windows and macOS operating systems is also provided. Don’t overlook the included documentation: a quick setup guide, a user manual offering detailed instructions, a product safety guide, and the warranty card. Confirming the presence of each item prevents potential issues during setup and ensures a smooth initial experience with your new printer.
Connecting Power and Cables
Begin by connecting the provided power cord to the printer’s power input and then to a grounded electrical outlet. Ensure the outlet provides the correct voltage to prevent damage. While the MFC-L3770CDW offers wireless connectivity, a USB cable (not included) can be used for a direct connection to your computer, if preferred.
This is particularly useful during the initial driver installation. Avoid connecting any other cables at this stage; focus solely on establishing power. Once powered on, the printer will initiate its startup sequence. It’s crucial to use a properly shielded USB cable if opting for a wired connection to maintain data integrity and prevent interference. Double-check all connections for a secure fit before proceeding to the software installation phase.
Installing Drivers and Software
Insert the included CD containing the drivers and software, or download the latest versions directly from the Brother support website. Run the installer and follow the on-screen prompts. The installation process will guide you through selecting your language, accepting the license agreement, and choosing the connection method – either USB or network (wireless or wired).
During installation, the software will detect the printer and install the necessary drivers for printing, scanning, and other functionalities. Brother iPrint&Scan is also available for mobile printing and scanning. Ensure your computer is connected to the internet during installation to automatically download any required updates. After completion, restart your computer to finalize the driver installation process.

Printer Hardware Components
The MFC-L3770CDW features a user-friendly control panel, easily accessible paper tray, and conveniently located toner cartridge and drum unit for simple maintenance.
Control Panel Overview
The Brother MFC-L3770CDW’s control panel is designed for intuitive operation. It features a 3.7-inch color touchscreen display, providing clear access to printer functions and settings. Users can easily navigate menus for tasks like scanning, copying, and network configuration. Dedicated buttons for frequently used functions, such as Stop, Back, and Start Color, offer quick access without navigating the touchscreen.
The touchscreen interface allows for customization of frequently used settings, streamlining workflows. Status indicators clearly display printer status, including toner levels and error messages. The panel also supports multiple language options, enhancing usability for diverse users. Through the control panel, you can directly initiate scans to various destinations, adjust copy settings, and monitor job progress. It’s a central hub for managing all printer operations efficiently.
Paper Tray and Handling
The Brother MFC-L3770CDW features a standard paper tray capable of holding up to 250 sheets of plain paper. It supports a variety of media types, including letter, legal, executive, A4, A5, and A6 sizes. An additional multipurpose tray accommodates up to 50 sheets, ideal for envelopes or thicker paper stocks. Proper paper loading is crucial for preventing jams; ensure paper is neatly stacked and aligned within the tray guides.
The printer automatically detects paper size and type, optimizing print quality. Adjustable paper guides ensure secure paper alignment. To prevent skewing, avoid overfilling the tray. The rear paper feed supports manual duplex printing and specialized media. Regularly check for and remove any curled or damaged sheets to maintain optimal performance and prevent potential paper handling issues.
Toner Cartridge and Drum Unit Location
Locating the toner cartridges and drum unit within the Brother MFC-L3770CDW is straightforward for easy replacement. Open the front cover of the printer to access the toner cartridges – cyan, magenta, yellow, and black – and the drum unit. Each color toner cartridge slots into its designated bay, while the drum unit sits centrally beneath them.
Brother strongly recommends using genuine Brother toner cartridges and drum units to ensure optimal print quality and printer longevity. The drum unit has a separate lifespan from the toner and will need replacing after several toner cartridge replacements. Always handle these components with care, avoiding direct contact with the image surface. Refer to the printer’s manual for detailed instructions on safe removal and installation procedures.

Basic Printing Operations
Printing with the MFC-L3770CDW is easily achieved from both Windows and Mac computers, alongside convenient mobile printing options utilizing the iPrint&Scan application.
Printing from a Computer (Windows)
To initiate printing from a Windows computer, ensure the Brother MFC-L3770CDW is properly connected and powered on. Verify the printer is selected as the default printer within your Windows settings. Open the document or file you wish to print from any compatible application, such as Microsoft Word or Adobe Acrobat.
Navigate to the “File” menu and select “Print.” A print dialog box will appear, allowing you to customize print settings. Here, you can adjust parameters like paper size, orientation (portrait or landscape), print quality (draft, standard, high), and color mode (color or black & white).
Select the desired settings and click the “Print” button to begin the printing process. The printer will then process the document and produce a hard copy. For advanced options, explore the printer properties within the print dialog box to fine-tune settings like duplex printing or color adjustments.
Printing from a Computer (Mac)
To print from your Mac to the Brother MFC-L3770CDW, first confirm the printer is connected via USB or network and powered on. Access System Preferences from the Apple menu, then select “Printers & Scanners.” Ensure the MFC-L3770CDW is listed and added to the printer list. If not, add it using the “+” button.
Open the document you intend to print from applications like Pages, Microsoft Word, or Safari. Select “File” then “Print.” The print dialog box will appear, offering options to customize your print job. Adjust settings such as paper size, orientation, number of copies, and print quality.
You can also select color or grayscale printing. For more detailed settings, click “Show Details” to access advanced options. Once satisfied with your selections, click the “Print” button to send the job to the printer.
Mobile Printing Options (iPrint&Scan)
Brother’s iPrint&Scan app provides convenient mobile printing and scanning capabilities for your MFC-L3770CDW. Download the app from the App Store (iOS) or Google Play Store (Android) on your smartphone or tablet. Ensure your mobile device and the printer are connected to the same Wi-Fi network.
Launch the iPrint&Scan app and allow it to discover your printer. Once detected, you can print documents, photos, and web pages directly from your mobile device. The app supports various file formats, including PDF, JPEG, and more. You can also access scanning functionalities to digitize documents and images.
iPrint&Scan offers workflow features, allowing you to enhance and organize your scans. Explore the app’s settings to customize print quality, paper size, and other preferences for optimal results. It’s a versatile tool for on-the-go printing and scanning.

Scanning and Copying Functions
The MFC-L3770CDW excels at scanning documents and images to a computer, or creating quick copies, offering versatile functionality for home and office needs.
Scanning to a Computer
Scanning to your computer with the Brother MFC-L3770CDW is a straightforward process. First, ensure the printer is connected to your computer, either via USB or network. Utilize the Brother iPrint&Scan application, available for both PC and Mac, for enhanced scanning workflow functionality. Alternatively, you can use the Windows Scan or Image Capture on macOS.
Place your document face down on the scanner glass, or load multiple pages into the automatic document feeder (ADF) for efficient batch scanning. Within the scanning software, select your desired settings – resolution, color mode (color, grayscale, or black & white), and file format (PDF, JPEG, TIFF, etc.). Preview the scan to ensure proper alignment and settings before finalizing. Click ‘Scan’ to initiate the process, and your document will be saved directly to your computer’s designated folder.
Copying Documents and Images
The MFC-L3770CDW excels at quickly creating copies of both documents and images. Begin by placing your original document face down on the scanner glass, or utilize the automatic document feeder (ADF) for multi-page copies. On the printer’s control panel, navigate to the ‘Copy’ function.
Adjust settings as needed, including the number of copies, reduction/enlargement ratio, and paper size. You can also select options like two-sided copying (duplex) to save paper. For image copies, experiment with color settings to achieve optimal results. Press the ‘Start’ button to initiate the copying process. The printer will automatically scan, process, and print the copies, delivering professional-quality reproductions with speed and efficiency. Previewing is available before starting a large copy job.
Scan to Email Setup
The MFC-L3770CDW simplifies document scanning directly to email. First, access the printer’s web interface via your computer’s browser by entering the printer’s IP address. Navigate to the ‘Scan to Email’ settings. You’ll need to configure an email account – either a direct SMTP setup or utilize a supported email service.
Input your email address, SMTP server details (including port and security settings), username, and password. Once configured, you can save these settings. On the printer’s control panel, select ‘Scan,’ then choose ‘Email’ as the destination. Enter the recipient’s email address, subject line, and any message text. Press ‘Start’ to scan and send your document. Ensure your network connection is stable for successful email transmission. Brother iPrint&Scan can also assist with this process;

Advanced Features and Settings
The MFC-L3770CDW offers duplex printing, customizable color adjustments, and comprehensive network configuration options for both wired and wireless connectivity, enhancing usability.
Duplex Printing (Two-Sided Printing)
The Brother MFC-L3770CDW boasts automatic duplex printing capabilities, significantly reducing paper consumption and contributing to a more environmentally friendly office practice. This feature allows you to print on both sides of a sheet of paper automatically, halving your paper usage for documents like reports, drafts, and internal memos.
To enable duplex printing, access the printer settings through your computer’s print dialog box. Locate the options for “Two-Sided Printing” or “Duplex Printing” and select your desired binding edge – either long-edge binding (like a book) or short-edge binding (like a calendar). The printer will then automatically flip the paper and print on the reverse side.
This functionality isn’t limited to standard documents; it also works with various paper types supported by the MFC-L3770CDW. Utilizing duplex printing not only saves paper but also creates professional-looking documents with a polished finish, streamlining your workflow and reducing costs.
Color Adjustment and Quality Settings
The Brother MFC-L3770CDW offers a range of settings to fine-tune print quality and color accuracy. Access these options through the printer’s control panel or the printer preferences on your computer. You can adjust color vibrancy, contrast, and brightness to achieve optimal results for different types of documents and images.
For photo printing, explore the dedicated photo settings, which often include options for enhancing skin tones, sharpening details, and adjusting color balance. The printer also allows you to select different print quality levels – from draft mode for quick, low-cost printing to high-resolution mode for professional-quality output.
Experiment with the color correction tools to calibrate the printer for specific paper types or to compensate for color casts. Regularly reviewing and adjusting these settings ensures consistently vibrant and accurate prints, maximizing the potential of the MFC-L3770CDW’s color capabilities.
Network Configuration (Wired and Wireless)
The Brother MFC-L3770CDW supports both wired and wireless network connectivity, enabling seamless printing and scanning from multiple devices. For a wired connection, simply connect an Ethernet cable from the printer to your network router or switch. The printer will typically obtain an IP address automatically via DHCP.
To configure wireless connectivity, access the printer’s control panel and navigate to the network settings. Select your Wi-Fi network from the available list and enter the password when prompted. Alternatively, you can use the WPS (Wi-Fi Protected Setup) button for a simplified connection process.
Once connected to the network, you can access the printer’s web interface by entering its IP address into a web browser. This interface allows you to monitor printer status, configure advanced settings, and manage network security features. Brother iPrint&Scan facilitates mobile access.

Troubleshooting Common Issues
Addressing typical problems with the MFC-L3770CDW involves resolving paper jams, print quality concerns, and connectivity glitches for optimal performance and reliability.
Paper Jams
Paper jams can occur in several areas of the Brother MFC-L3770CDW. First, always power off the printer before attempting to clear any jam to prevent injury. Check the paper tray, ensuring it’s not overfilled and the paper guides are correctly adjusted for the paper size.
If the jam is within the main unit, carefully open the rear cover and remove any visible paper fragments. Gently pull the paper straight out, avoiding tearing. Also, inspect the duplex unit (if applicable) for obstructions. For jams near the toner area, exercise extreme caution to avoid damaging the drum unit or toner cartridge.
After clearing the jam, ensure all paper scraps are removed, close all covers securely, and power the printer back on. If jams persist, verify you are using supported paper types and weights, and that the paper isn’t damp or damaged. Refer to the full manual for detailed diagrams.
Print Quality Problems
Addressing print quality issues on the Brother MFC-L3770CDW starts with checking toner levels. Low toner can cause faded prints. Next, inspect the printed page for specific defects – streaks, smudges, or missing colors. Streaks often indicate a dirty drum unit; cleaning it may resolve the issue.
For color inaccuracies, access the printer’s settings via the control panel or software and adjust the color density or profile. Ensure you’ve selected the correct paper type in the printer driver, as this impacts toner fusing. If prints are consistently poor, run a cleaning cycle from the maintenance menu.
Consider the age of the drum unit and toner cartridges; older consumables degrade over time. Finally, verify the print resolution setting is appropriate for your needs. Consult the manual for detailed troubleshooting steps and image examples.
Connectivity Issues
Resolving connectivity problems with the Brother MFC-L3770CDW begins by verifying physical connections for wired networks – ensure the Ethernet cable is securely plugged into both the printer and the router. For wireless connections, confirm the printer is within range of the Wi-Fi signal and that the correct network password has been entered.
If the printer isn’t discoverable on the network, restart both the printer and your router. Utilize the Brother iPrint&Scan app to attempt a direct connection, bypassing network complexities. Check the printer’s network configuration settings via the control panel to confirm it’s assigned a valid IP address.
Firewall settings on your computer could be blocking communication; temporarily disable the firewall to test. Refer to the manual for specific IP address configuration instructions and troubleshooting steps for network discovery issues.

Maintenance and Cleaning
Regular maintenance ensures optimal performance of the MFC-L3770CDW; cleaning the exterior and timely replacement of toner and drum units are crucial steps.
Cleaning the Printer Exterior
Maintaining a clean exterior not only enhances the appearance of your Brother MFC-L3770CDW but also contributes to its longevity. Before cleaning, always power off the printer and disconnect it from the power source to prevent electrical shock. Use a soft, lint-free cloth, lightly dampened with water, to wipe down the exterior surfaces. Avoid using abrasive cleaners, solvents, or excessive moisture, as these can damage the printer’s finish.
Pay particular attention to areas that accumulate dust or fingerprints, such as the control panel and paper tray. For stubborn marks, a mild detergent solution can be used, but ensure it is thoroughly wiped away with a clean, damp cloth afterward. Never spray liquids directly onto the printer; always apply them to the cloth first. Regularly cleaning the exterior will help keep your MFC-L3770CDW looking its best and functioning reliably.
Replacing Toner Cartridges
Replacing toner cartridges in your Brother MFC-L3770CDW is a straightforward process. First, ensure the printer is powered on. Open the front cover to access the toner cartridges and drum unit. Gently pull out the toner cartridge you wish to replace – black, cyan, magenta, or yellow. Remove the new toner cartridge from its packaging and gently rock it from side to side to distribute the toner.
Align the new cartridge with the slot and slide it firmly into place until it clicks. Repeat this process for any other cartridges needing replacement. Close the front cover. The printer will automatically detect the new cartridges; Brother recommends using genuine Brother toner cartridges for optimal print quality and printer performance. Discard used cartridges responsibly, following local recycling guidelines.
Replacing the Drum Unit

Replacing the drum unit in your Brother MFC-L3770CDW is essential for maintaining print quality. Begin by ensuring the printer is powered on and open the front cover to access the drum unit and toner cartridges. Carefully remove the toner cartridge(s) associated with the drum unit you’re replacing. Then, gently lift and pull out the drum unit itself – it’s a larger component than the toner.

Unpack the new drum unit, removing all protective coverings. Align the new unit with the slot and slide it firmly into place until it clicks securely. Reinstall the corresponding toner cartridge(s). Close the front cover. Brother strongly advises using only genuine Brother drum units to prevent damage and ensure optimal performance. Properly dispose of the used drum unit according to local regulations.