How to connect the Brother DCP-T420W printer to Wi-Fi: complete instructions with photos and tips

Wireless printer connection Brother DCP-T420W Connecting a printer to a home or office Wi-Fi network opens up a wealth of possibilities: printing from a laptop, smartphone, or tablet without the hassle of wires, sharing access between multiple devices, and even managing it via cloud services. However, many users encounter difficulties during the setup process—the printer doesn't find the network, requires incomprehensible passwords, or refuses to connect altogether. This article will help you understand all the nuances of the process, from preparing the equipment to diagnosing common errors.

We will consider two main ways of connection: via WPS (the fastest method) and manual tuning (if your router doesn't support WPS or the feature is disabled). You'll also learn how to check the connection, update your printer's firmware for stable operation, and what to do if the device can't detect your network. At the end of the article, you'll find answers to frequently asked questions and tips for optimizing wireless printing.

Important: the instructions are valid for the model DCP-T420W with the latest firmware version. If your printer was manufactured before 2022, some menu items may differ—we'll notify you of this separately.

1. Preparing the printer and router for connection

Before setting up Wi-Fi, make sure both devices are ready to work. Start by checking router:

• 📶 Wi-Fi signal should be stable. If the printer will be located far from the router, use repeater or mesh system.
• 🔒 Network password It should be known. If you forgot it, look at the router's sticker or reset it to factory settings.
• 🔄 WPS mode (If you plan to use it for connection) must be activated. The WPS button is usually located on the back of the router.

Now prepare the printer itself Brother DCP-T420W:

1. Connect the printer to a power outlet and turn it on using the button Power (front left).
2. Make sure there is paper in the tray - you will need this to print a test sheet with your settings.
3. If the printer was previously connected to a different network, reset the network settings: hold down the button Wi-Fi for 5 seconds until the indicator starts flashing orange.

⚠️ Attention: If your router is in the mode 802.11n/ac/ax (5 GHz), the printer may not see it. DCP-T420W supports networks only 2.4 GHzSwitch your router to compatible mode or create a separate network for 2.4 GHz.

The router is turned on and distributing Wi-Fi|The network password is known|The printer is turned on and ready for setup|There is paper in the tray for a test print-->

2. Connect via WPS (the fastest way)

Technology WPS (Wi-Fi Protected Setup) allows you to connect your printer to your network without entering a password—just press a button on your router. This is the easiest method if your router supports WPS.

Instructions:

1. On the printer, press and hold the button Wi-Fi (with the antenna icon) for 2 seconds until the indicator starts flashing blue quickly.
2. For 2 minutes press the button WPS on the router. It is usually labeled or marked with an icon .
3. Wait until the Wi-Fi light on the printer turns on blue all the time - this means that the connection is successful.

If the indicator continues to flash or turns orange, repeat the process. Possible reasons for failure:

• ⏱️ The wait time (2 minutes) has expired - please try again.
• 🔌 WPS is disabled in the router settings - enable it through the web interface (usually at the address 192.168.0.1 or 192.168.1.1).
• 🔒 The router uses an incompatible encryption type (for example, WPA3). Switch to WPA2-PSK (AES).

3. Manual connection to Wi-Fi (via the printer menu)

If WPS isn't working or is disabled, configure the connection manually through the printer's control panel. This method is universal and works on all networks.

Steps:

1. Press the button on the printer Menu (menu).
2. Go to the section Network → WLAN → Setup Wizard (Network → Wireless network → Setup Wizard).
3. The printer will begin searching for available networks. Select your network from the list using the buttons. ↑/↓ and press OK.
4. Enter your Wi-Fi password. To do this:
• Use the numeric keypad on the printer control panel.
• To switch between uppercase/lowercase letters, press #.
• To enter characters (for example, ! or @) hold * and select the desired sign.

After entering the password, click OK and wait for the connection to complete. The Wi-Fi indicator should turn blue.

If your network does not appear in the list, check:

• 📡 The printer is within the router's range (no further than 10 meters without obstacles).
• 🔍 The network is not hidden (disable this option in the router settings) Hide SSID).
• 📶 The router is operating in the mode 2.4 GHz (the printer does not support 5 GHz).

⚠️ Attention: When entering the password manually, the printer Brother DCP-T420W Doesn't support Cyrillic characters. If your password contains Russian letters, temporarily change it to Latin characters.

4. Checking a successful connection

After setup, make sure the printer is actually connected to the network. To do this:

1. Press the button on the printer Menu → Network → WLAN → Connection Report (Connection report).
2. The printer will print a sheet with network data. Check the following lines:

If the status in the report is Connected, and the IP address starts with 192.168 or 10.0, the printer is successfully connected. If not, reboot the printer and router, then repeat the setup.

You can also check the connection from a computer:

1. Open Command Prompt (Win + R → cmd).
2. Enter the command:

   ping 192.168.0.105

   (replace IP with the one indicated in the printer report).

3. If the ping is successful (no errors), the printer is available on the network.

5. Installing drivers and setting up printing on a PC

Once the printer is connected to Wi-Fi, you'll need to install drivers on your computer or laptop to start printing. You can download the official software from the website. Brother:

1. Go to the support page: support.brother.com.
2. Enter your printer model: DCP-T420W.
3. Select your operating system (eg. Windows 11 x64).
4. Download Full Driver & Software Package (full driver package).

Installation:

1. Run the downloaded file (for example, Y18A_C1-hostm-LITE Full Driver.exe).
2. Select Wireless connection in the installation wizard.
3. Follow the on-screen instructions. The program will automatically find the printer on the network.
4. Once installation is complete, print a test page.

For macOS or Linux:

• 🍎 On Mac, download the driver from the Brother website and install it via Installer.
• 🐧 On Linux use CUPS or drivers from repositories (package brother-dcpt420w).

⚠️ Attention: If the printer is not present during driver installation, temporarily connect it to your computer via USB, install the software, and then disconnect the cable – Wi-Fi printing will work.

6. Connecting to a printer from a smartphone (Android/iOS)

One of the key advantages Brother DCP-T420W — the ability to print from mobile devices. For this, use the official app. Brother iPrint&Scan (available for Android And iOS).

Instructions:

1. Install the application and open it.
2. Click Add a printer → Search the web.
3. Choose yours DCP-T420W from the list of found devices.
4. If the printer is not found, enter its IP address manually (you can find it in the connection report, as described above).

Application functions:

• 📄 Print documents from Google Drive, Dropbox or galleries.
• 📷 Print photos with size and quality adjustments.
• 🔍 Scanner with saving in PDF/JPEG.
• 📋 View ink levels and printer status.

To print from other applications (eg. Word or Chrome) select Print → Brother DCP-T420W in the menu.

What to do if your smartphone can't find the printer?

1. Make sure your phone and printer are connected to the same Wi-Fi network.

2. In the router settings, disable client isolation (AP Isolation).

3. Restart your printer and smartphone.

4. In the Brother iPrint&Scan application, refresh the list of devices (refresh button in the upper right corner).

7. Typical errors and their elimination

Even with proper setup, problems can still arise. Let's look at the most common errors and how to solve them.

If the printer is connected, but the computer does not “see” it, try:

1. Enter the printer's IP address manually when adding a device in Windows (Control Panel → Devices and Printers → Add a Printer → Local Printer → Create a new port → Standard TCP/IP Port).
2. Disable IPv6 in the network connection properties (sometimes this prevents devices from being discovered).

To diagnose the network on the printer:

1. Click Menu → Network → WLAN → Advanced Setup → Ping Test.
2. Enter the IP address of the router (for example, 192.168.0.1) and run the test. If the ping fails, the problem is with the router or cable.

8. Optimizing printer operation via Wi-Fi

To ensure stable wireless printing, follow these tips:

• 📶 Place the printer at a distance of no more than 5–7 meters from the router without thick walls between them.
• 🔄 Configure it on your router fixed IP address for the printer (by MAC address) so that it does not change when rebooted.
• 🔒 Update your printer firmware via Menu → General Setup → Firmware Update (Internet connection required).
• 📵 Turn off the power saving mode on your printer (Menu → General Setup → Sleep Mode → Off), if he often “falls asleep”.

For offices with multiple printers:

• Set up different SSIDs for printers and basic devices to reduce network load.
• Use guest network for printers, if you need to restrict access to the main network.

If the printer is rarely used, disconnect it from the Wi-Fi network via the menu (Menu → Network → WLAN → Disconnect). This will save energy and reduce the load on the router.

Frequently Asked Questions (FAQ)

Can I connect the Brother DCP-T420W to Wi-Fi without a display?

Yes, but only via WPS. Press and hold the button. Wi-Fi On the printer, press and hold for 2 seconds, then activate WPS on the router. The display is not required for this.

The printer is connected to Wi-Fi, but it won't print from my phone. What should I do?

Check:

1. The phone and printer are connected to the same Wi-Fi network.
2. In the appendix Brother iPrint&Scan The printer has been added correctly.
3. The VPN or proxy is disabled on the phone (they may block the local connection).

How do I reset my printer's Wi-Fi settings?

Press and hold the button Wi-Fi for 5-7 seconds until the indicator light starts flashing orange. After this, the printer will forget all saved networks.

Does the DCP-T420W support cloud printing (Google Cloud Print, AirPrint)?

No, this model does not support Google Cloud Print (service closed in 2020) and AirPrintTo print from iPhone/iPad, use the app Brother iPrint&Scan.

Is it possible to connect a printer to Wi-Fi Direct (without a router)?

No, Brother DCP-T420W does not support Wi-Fi DirectTo work without a router, use a USB cable.