Modern multifunctional devices are no longer bulky machines that require a constant cable connection to a computer. Model Brother DCP-T420W It has become a popular choice for homes and small offices thanks to its built-in wireless module. The ability to print documents or scan images from any device within the router's range significantly simplifies workflow and frees up space from unnecessary cables.
However, the initial setup wireless connection This often causes confusion for users new to this type of technology. The interface can seem confusing, and the automatic network search doesn't always work correctly the first time. In this article, we'll examine in detail all the available Wi-Fi activation methods, paying special attention to the nuances often overlooked during standard installation.
You'll learn how to enter the password correctly, what to do if your device doesn't detect the router, and how to avoid common configuration errors. Proper setup will ensure stable operation. printer throughout its entire lifespan, allowing you to instantly send print jobs from your smartphone or tablet without having to connect a USB cable each time.
⚠️ Important: Before starting setup, make sure there is ink in the cartridges and paper in the tray. Some models Brother block network functions if initial print head calibration is not completed.
Equipment preparation and compatibility testing
The first step is to physically prepare the device for wireless operation. Make sure the router is turned on, working properly, and broadcasting a signal. Printer The device must be located within a strong reception area, preferably no more than 5-10 meters from the access point, with no thick concrete walls or metal obstacles between them. This is critical for future connection stability.
You also need to know the exact name of your network (SSID) and the password to access it. If you're using a guest network or a network with client isolation, connecting a device to it is pointless—it won't be able to communicate with your computer. It's best to use your main home network with encryption. WPA2-PSK or WPA3.
- 📶 Make sure that your router operates at 2.4 GHz, as the model T420W may not support modern 5 GHz networks.
- 🔌 Check that the device is connected to the power supply and is in a ready state (not in sleep mode).
- 📝 Write down your WiFi password in advance so you don't have to look for it during setup when your device's screen goes dark.
It's important to understand that older encryption standards, such as WEP, may not be supported by modern drivers, and complex special characters in passwords can sometimes cause input errors through the printer interface. If your password contains rare characters, it might be worth temporarily simplifying it for the pairing process.
Quick setup method via WPS
The fastest way to connect Brother T420W To connect to the network, use WPS (Wi-Fi Protected Setup) technology. This method eliminates the need to manually enter a password, which is especially convenient if it's long and complex. Most modern routers have a physical button to activate this mode or a software button in the web interface.
First, find the button WPS on your router and press it. You'll then need to activate search mode on the printer within two minutes. On the MFP control panel, press the "Menu" button, then use the arrow keys to navigate to the "Network" section. From the list that appears, select "WLAN" and then "WPS."
Menu -> Network -> WLAN -> WPSOnce selected, the device will begin searching for a signal. If the router is in pairing mode, the WiFi indicator on the printer will blink and then turn solid, indicating a successful connection. A connection report will appear on the screen, which can be printed to confirm the IP address.
⚠️ Please note: The WPS function only works for a short time (usually 2 minutes). If you miss the printer button after activating it on the router, you'll have to repeat the process.
Manual setup via the device menu
If automatic pairing isn't possible, you'll have to enter the data manually. This method is more secure on networks with a hidden SSID or complex security configuration. In the control panel, press the "Menu" button, go to "Network," and select "WLAN." Unlike WPS, here we select "Setup Wizard."
The device will begin scanning for available networks. Find your router's name in the list that appears. If the network is hidden, select "Enter SSID" and enter the name manually using the on-screen alphanumeric keypad. After selecting the network, you'll be prompted to enter the password. Be careful: case-sensitive letters are important, and symbols may be difficult to read on the small display.
- 🔍 Use the navigation arrows to select characters and the OK button to confirm each character.
- 🔄 If you make a mistake, look for the delete button (usually marked with a back arrow or a cross) before confirming your entry.
- 📡 Make sure you select the correct encryption type, although modern Brother printers usually it is determined automatically.
After entering the password, the device will attempt to establish a connection. This process may take up to a minute. If successful, the message "Connected" will appear on the screen along with the IP address. Write down this address; you'll need it to install drivers and access the device's web interface.
☑️ Checking manual settings
Setup via USB cable and computer
Sometimes it's more convenient to use a computer as an intermediary for transferring network settings. To do this, you'll need a USB cable and a full driver package installed on your PC. BrotherThis method is especially useful if you find the printer interface awkward or the screen is too small for comfortable data entry.
Run the driver installer from the official website or disc. During the installation, select the "Wireless Network" connection type. When prompted to connect the device, connect the printer to your computer via USB. The installer will automatically detect the device and offer to transfer the WiFi settings your computer is already using.
This method is advantageous because it eliminates the risk of manual password entry errors. The computer will automatically transfer all the necessary encryption keys to the printer's memory. After receiving the settings, the device will disconnect the USB connection and switch to wireless mode. If you're using a Mac, the process is similar, but the installation interface may differ.
⚠️ Important: When using the USB method, temporarily disable VPN clients and antivirus firewalls, as they may block the transfer of network settings from your computer to the printer.
Using the Brother iPrint&Scan mobile app
For smartphone and tablet users, the company Brother developed an application iPrint&Scan, which significantly simplifies initial setup. Available for iOS and Android, the app not only allows you to print but also configure the device's network settings directly from your phone's screen.
Launch the app and select the option to set up a new device. The app will ask you to temporarily connect your phone to the printer's WiFi network (Direct Connection), which appears immediately after turning on the device. The name of this network usually includes the model number, for example, Brother-T420W.
Once connected, your phone will send your home router settings to the printer. This is a very convenient method, eliminating the need to enter passwords on the MFP's small keyboard. The app also lets you print a network report and check signal strength in real time.
What to do if the phone doesn’t see the printer?
Make sure location and Bluetooth (for Android 10+) are enabled on your phone, as they are required to search for devices on the local network. Also, make sure you're connected to the printer's network, not your home WiFi, when transferring settings.
Indicator table and problem diagnostics
Understanding the status of the indicators on the control panel helps you quickly diagnose problems. Model DCP-T420W Equipped with a WiFi LED indicator that flashes at different rates depending on the status. Below is a breakdown of the main statuses.
| Indicator status | Meaning | Action |
|---|---|---|
| It's on constantly | Successful connection to the network | You can start printing. |
| Blinks slowly | Searching for a network or getting an IP | Wait for the process to complete |
| Flashing quickly | Connection or WPS error | Check the password or distance |
| It doesn't burn. | WiFi is turned off or the module is faulty | Turn on WiFi in the menu or reboot |
If the indicator light is flashing rapidly or doesn't light at all, try resetting the network settings. To do this, select "Network" in the menu, then "Network Reset." This will return the settings to factory defaults and allow you to restart the connection process. This often resolves network module freezes.
Frequently Asked Questions (FAQ)
Can the Brother T420W be connected to a hidden WiFi network?
Yes, this is possible, but only through the manual menu on the device itself. Connecting to a hidden network (when the SSID isn't broadcast) in WPS mode or via the mobile app won't work. You'll have to manually enter the exact network name and password through the printer menu.
Why doesn't the printer see the 5 GHz network?
Model T420W The printer is equipped with a module that only operates in the 2.4 GHz band. If your router broadcasts networks with the same name for both bands, try separating them in the router settings, giving the 2.4 GHz network a unique name, and connecting the printer to it only.
How to find out the printer's IP address after connection?
Press the "Menu" button on the device, go to the "Network" section, and select "TCP/IP." The current IP address will be displayed. You can also print a network configuration report by selecting the appropriate option in the menu or by holding the report button.
What should I do if my printer stops printing after changing my router?
If you change your router or WiFi password, the old settings will become invalid. You'll need to reset the printer's network and reconnect (via WPS, menu, or USB) so the device remembers the new settings.