An industrial printer for high volumes, like central production kitchens. It plugs into your router with a cable and gets a fixed address, so the app can always find it.
| TJ-4121TN | The TJ model shown in this guide. |
Get the roll flush. It decides whether labels print in the right place.
Open the media cover. Slide the green Label Roll Guard to the end of the spindle and flip it down.
Put the roll on the spindle, print side facing up, pushed all the way back against the inner wall.
Flip the Label Roll Guard back up so it holds the roll.
Run the labels under the damper, through the sensor and out past the print head.
Push the Print Head Release Lever to open the head, then feed the labels under the clear damper bar.
Thread the labels through the media sensor. Turn its knob so the ▼ gap mark sits over the labels.
Pull the labels out past the print head. Line up the left edge with the edge of the head nearest the printer wall.
Turn the green knob to your label width: 1–2″ for small labels, 3–4″ for wide ones. Press down on both sides until the head locks.
A cable to your router, then a fixed address so the app can always find it.
Plug one end into the network port on the back of the printer and the other into your router. Switch the printer on.
On the printer's screen tap Menu → Interface → Ethernet → Configure.
Tap DHCP and set it to Off. If it asks you to confirm, tap Yes.
Tap Static IP and fill in IP address (e.g. 192.168.1.50), Subnet mask (usually 255.255.255.0) and Gateway (your router, usually ending in .1). Tap ✓ to save, and write the address down.
On the home screen you'll see the network icon and ETH with your address under Ready.
So every label starts in the same place. Do it every time you change rolls.
Roll loaded and threaded, head locked on both sides.
On the touchscreen: Menu → Sensor → Auto Calibration → Gap. The printer feeds up to three labels, then stops.
Tap the Feed icon. Exactly one label should come out.
Once on every phone or tablet you print from.
Open the app and log in. Tap the printer button at the top of Home and pick TJ printers, then tap Configure printer.
Type the fixed address you wrote down. Leave the port as 9100. Tap Search printer, then Save printer.
Back on Home, tap Check status. A pop-up shows Ready or Not ready, with the printer's address.
Quick Print prints one label. Print asks how many: type the number and tap YES.
New router, printer moved, or its settings were reset.
Tap the menu ☰ at the top left of Home, then Settings → Network printer.
Tap Search printer, then Save printer.
For a fault with the printer itself, not the app.
0333 777 4444, Monday to Friday, 9am to 5.30pm.
It's on the label on the back of the printer. Brother checks the warranty and books the repair.
