Brother MFC-L3770CDW Manual

The Brother MFC-L3770CDW is a color laser All-in-One printer featuring print, copy, scan, and fax capabilities. It offers fast printing speeds, automatic duplex printing, wireless and network connectivity, a large paper capacity, and a color touchscreen display. Below are key sections for safety, features, installation, setup, operation, maintenance, and troubleshooting.

Features at a Glance

Key components: Color Laser Engine, 3.7-inch Color Touchscreen, Automatic Document Feeder (ADF), Paper Trays, Toner Cartridges, Network/Wireless Interfaces.

Feature	Description
Print Speed	Up to 31 pages per minute (black & color)
Automatic Duplex Printing	Print on both sides of the paper automatically
Paper Capacity	Up to 300 sheets (standard), optional tray available
Connectivity	Ethernet, Wi-Fi, Wi-Fi Direct, USB
Touchscreen Display	3.7-inch color LCD for easy navigation
Automatic Document Feeder (ADF)	50-sheet capacity for scanning/copying multi-page documents
Brother Mobile Apps	Print and scan from mobile devices using Brother iPrint&Scan
Cloud Connectivity	Direct printing from Google Cloud Print, Apple AirPrint, Mopria
Toner Save Mode	Reduces toner consumption for draft prints
Security Features	Secure Print, Locked Print, User Authentication

Installation & Setup

Unpack and inspect contents. Place on a stable, level surface near a power outlet and network connection if needed.

1. Remove all packaging materials and tapes from inside and outside the machine.
2. Install the toner cartridges: Open front cover, remove packing material, insert cartridges (Black, Cyan, Magenta, Yellow) until they click.
3. Load paper into the paper tray: Adjust guides, fan the paper, load face down.
4. Connect power cord and turn on the machine using the power switch.
5. Follow the on-screen prompts to set language, date, and time.
6. For network setup: Connect Ethernet cable or use the control panel to configure Wi-Fi.
7. Install drivers and software from the included CD or download from Brother's website.

WARNING! The machine is heavy; lift with care using two people. Ensure the power cord is easily accessible.

Specifications

• Type: Color Laser All-in-One (Print, Copy, Scan, Fax)
• Print Resolution: Up to 2400 x 600 dpi
• First Print Out Time: Less than 10 seconds
• Recommended Monthly Volume: Up to 3,000 pages
• Scanner Type: Flatbed + ADF (50 sheets), CIS
• Scan Resolution: Up to 1200 x 1200 dpi
• Fax Modem Speed: 33.6 kbps, Super G3
• Memory: 512 MB
• Operating Systems: Windows, macOS, Linux
• Power Consumption: Approx. 570W (printing), 65W (ready), 1.4W (sleep)
• Dimensions (W x D x H): 16.1" x 18.5" x 15.9"
• Weight: Approx. 55.1 lbs

Controls and Display

Access functions via the 3.7-inch color touchscreen and physical buttons.

Control Panel: Power Button, Home Button, Navigation Arrow Keys, OK, Back, Stop/Exit, Start (Color/Black).

Touchscreen Menu: Home screen shows main functions (Print, Copy, Scan, Fax, Settings). Settings include: Network, Device, Print Reports, Maintenance, Security. Use the display to adjust copy settings (number of copies, darkness, zoom), scan destinations, fax numbers, and printer configuration.

Loading Paper & Toner

Loading Paper:

1. Pull out the paper tray completely.
2. Adjust the paper guides to match your paper size.
3. Fan the stack of paper and load it print-side down.
4. Push the tray gently back into the machine.
5. Use the control panel to select the correct paper type and size if needed.

Replacing Toner:

1. Open the front cover.
2. Remove the old toner cartridge by pulling the green lever and lifting it out.
3. Unpack the new cartridge, shake it gently, and remove the protective tape.
4. Insert the cartridge into its slot and push until it clicks into place.
5. Close the front cover. The machine will calibrate automatically.

Tip: Use only genuine Brother TN-730 series toner cartridges.

Printing Operations

Print from your computer, mobile device, or USB drive.

1. Ensure the printer is turned on and connected to the same network as your device.
2. From your computer, select 'Print' in your application and choose 'Brother MFC-L3770CDW'.
3. Adjust print settings as needed (duplex, color, quality, paper size).
4. Click Print. The job will be sent to the printer.
5. For mobile printing, use Brother iPrint&Scan, Apple AirPrint, or Google Cloud Print.
6. For USB printing, insert a USB flash drive into the front port and use the touchscreen to select files.

WARNING! Do not touch the fuser unit inside the machine; it is hot during and after printing.

Copying Operations

Make copies using the flatbed or ADF.

1. Place the original document face down on the flatbed or face up in the ADF.
2. On the touchscreen, tap 'Copy'.
3. Adjust settings: Number of copies, Darkness, Zoom (25% to 400%), Paper Size, 2-sided copying.
4. Press the Black or Color Start button to begin copying.

CAUTION! Do not place heavy objects on the scanner glass or force documents into the ADF.

Scanning Operations

Scan to email, network folder, USB, or cloud services.

1. Place the document on the flatbed or in the ADF.
2. On the touchscreen, tap 'Scan'.
3. Select your scan destination (PC, Email, USB, Cloud).
4. Adjust scan settings (Resolution, File Format, Size).
5. Press Start. For PC scanning, ensure the Brother software is installed on your computer.

Fax Operations

Send and receive faxes. Requires connection to a working analog telephone line.

1. Connect the telephone line cord to the LINE port on the back of the machine.
2. Place document in the ADF or on the flatbed.
3. On the touchscreen, tap 'Fax'.
4. Enter the fax number using the keypad or select from the address book.
5. Adjust settings if needed (Resolution, Darkness).
6. Press the Black or Color Start button to send.
7. To receive faxes automatically, ensure the machine is in Fax mode.

Network & Wireless Setup

Connect the printer to your wired or wireless network.

Wired (Ethernet): Connect an Ethernet cable from your router to the printer's LAN port. The IP address will be assigned automatically (DHCP).

Wireless (Wi-Fi):

1. On the touchscreen, go to Settings > Network > Wireless.
2. Select your Wi-Fi network from the list and enter the password.
3. The printer will connect and display its IP address.
4. Alternatively, use WPS (Wi-Fi Protected Setup) if your router supports it.

Wi-Fi Direct: Allows devices to connect directly to the printer without a router. Enable from the Network menu.

Maintenance & Care

Keep the printer clean for optimal performance.

1. Unplug the power cord before cleaning.
2. Wipe the exterior with a soft, dry cloth. Do not use abrasive cleaners or aerosols.
3. Clean the scanner glass and ADF rollers with a soft, lint-free cloth lightly dampened with water.
4. Clean the corona wire inside the drum unit if print quality issues occur (streaks, spots). Access via the front cover.
5. Run the printer maintenance utilities from the control panel (Cleaning, Drum Refresh, Alignment).

CAUTION! Do not touch the green surface of the drum unit. Keep toner cartridges and drum unit out of direct sunlight.

Troubleshooting

Symptom	Possible Cause	Corrective Action
Printer not printing	Connection, power, paper jam	Check network/power cables; clear any paper jams; restart printer.
Poor print quality	Low toner, dirty drum	Replace toner cartridge; clean the corona wire; run printer cleaning utility.
Paper jams	Incorrect paper loading, worn rollers	Follow on-screen guide to clear jam; ensure paper is not wrinkled or damp.
Scanner not working	Software, connection	Reinstall Brother software; ensure scanner driver is installed correctly.
Wi-Fi connection lost	Signal, settings	Move printer closer to router; re-enter Wi-Fi password; restart router and printer.
Touchscreen unresponsive	Software lock	Restart the printer. If issue persists, perform a factory reset from the menu.
'Toner Empty' message	Genuine cartridge, sensor	Use genuine Brother cartridge; reseat the cartridge; reset toner counter in maintenance menu.

Reset: Settings > Device > Reset Settings (Network Reset, Factory Reset).

Support: Brother Solutions Center: support.brother.com; Phone: 1-877-276-8437