Brother MFC-J3940DW - Enable;Disable Wireless LAN

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Home > Network > Wireless Network Settings > Enable/Disable Wireless LAN

Enable/Disable Wireless LAN

1. Press [Settings] > [Network] > [Network I/F].

2. Do one of the following:

• To enable Wi-Fi, select [WLAN(Wi-Fi)].

• To disable Wi-Fi, select [Wired LAN].

3. Press .

Related Information

• Wireless Network Settings

295

Main Page

Table of Contents2
Before You Use Your Machine8
Definitions of Notes9
Trademarks10
Open Source Licensing Remarks11
Copyright and License12
Important Notes13
Introduction to Your Machine14
Before Using Your Machine15
Control Panel Overview16
Touchscreen LCD Overview19
Settings Screen Overview22
Set the Ready Screen24
Set Default Function Screens25
Enter Text on Your Brother Machine26
Access Brother Utilities (Windows)27
Uninstall the Brother Software and Drivers (Windows)28
Access Brother Iprint&Scan (Windows/Mac)29
USB / Ethernet Port Locations on Your Brother Machine30
Paper Handling31
Load Paper32
Loading Paper Overview33
Load Paper in Paper Tray #1 / Paper Tray #236
Load Paper in the Multi-Purpose Tray (MP Tray)51
Load Paper in the Manual Feed Slot59
Unprintable Area62
Paper Settings63
Acceptable Print Media68
Load Documents74
Load Documents in the Automatic Document Feeder (ADF)75
Load Documents on the Scanner Glass77
Unscannable Area78
Print79
Print from Your Computer (Windows)80
Print a Photo (Windows)81
Print a Document (Windows)82
Cancel a Print Job (Windows)83
Print more than One Page on a Single Sheet of Paper (N in 1) (Windows)84
Print as a Poster (Windows)85
Print on both Sides of the Paper Automatically (Automatic 2-Sided Printing) (Windows)86
Print as a Booklet Automatically (Windows)89
Print a Colour Document in Greyscale (Windows)91
Print a Long Paper (Windows)92
Prevent Smudged Printouts and Paper Jams (Windows)93
Use a Preset Print Profile (Windows)94
Change the Default Print Settings (Windows)97
Print Settings (Windows)98
Print from Your Computer (Mac)102
Print Using Brother Iprint&Scan (Windows/Mac)103
Print Photos or Documents Using Brother Iprint&Scan (Windows/Mac)104
Print on both Sides of the Paper Automatically Using Brother Iprint&Scan (Automatic 2-Sided Printing) (Windows/Mac)106
Print more than One Page on a Single Sheet of Paper Using Brother Iprint&Scan (N in 1) (Windows/Mac)108
Print a Colour Document in Greyscale Using Brother Iprint&Scan (Windows/Mac)109
Print Data Directly from a USB Flash Drive110
Compatible USB Flash Drives111
Print Photos Directly from a USB Flash Drive112
Scan122
Scan Using the Scan Button on Your Machine123
Scan Multi-Page Letter or A4 Size Documents124
Scan Photos and Graphics125
Save Scanned Data to a Folder as a PDF File127
Save Scanned Data to a USB Flash Drive129
Scan Multiple Business Cards and Photos (Auto Crop)132
Scan to an Editable Text File Using OCR133
Save Scanned Data as an Email Attachment135
Send Scanned Data to an Email Recipient137
Scan to FTP139
Scan to Network (Windows)143
Web Services for Scanning on Your Network (Windows 7, Windows 8.1, and Windows 10)147
Change Scan Settings Using Brother Iprint&Scan151
Scan Using Brother Iprint&Scan (Windows/Mac)152
Scan from Your Computer (Windows)153
Scan Using Nuance ™ Paperport ™ 14SE or Other Windows Applications154
Scan Using Windows Fax and Scan159
Scan from Your Computer (Mac)163
Configure Scan Settings Using Web Based Management164
Set the Scan File Name Using Web Based Management165
Set the Scan Job Email Report Using Web Based Management166
Copy167
Copy a Document168
Enlarge or Reduce Copied Images170
Sort Copies171
Make Page Layout Copies (N in 1 or Poster)172
Copy on both Sides of the Paper (2-Sided Copy)175
Copy an ID Card178
Use the A3 Copy Shortcuts180
Copy Settings182
Fax184
Send a Fax185
Send a Fax from Your Brother Machine186
Send a 2-Sided Fax from the ADF188
Send a Fax Manually189
Send a Fax at the End of a Conversation190
Send the same Fax to more than One Recipient (Broadcasting)192
Send a Fax in Real Time195
Send a Fax at a Specified Time (Delayed Fax)196
Change the Fax Auto Redial Setting197
Cancel a Fax in Progress198
Check and Cancel a Pending Fax199
Fax Options200
Receive a Fax201
Receive Mode Settings202
Set Fax Detect206
Fax Preview207
Shrink Page Size of an Oversized Incoming Fax211
Set the Fax Receive Stamp212
Receive a Fax at the End of a Telephone Conversation213
Memory Receive Options215
Remote Fax Retrieval222
Voice Operations and Fax Numbers228
Voice Operations229
Store Fax Numbers232
Set up Broadcasting Groups237
Telephone Services and External Devices241
Phone Line Services242
Caller ID243
Voice over Internet Protocol (Voip/Telephone Line Interference)246
External TAD (Telephone Answering Device)247
External and Extension Telephones251
Fax Reports256
Set the Transmission Verification Report's Style257
Set the Fax Journal's Interval Period258
Pc-Fax259
PC-FAX for Windows260
PC-FAX for Mac(Sending Only)279
Network280
Supported Basic Network Features281
Configure Network Settings282
Configure Network Settings Using the Control Panel283
Wireless Network Settings284
Use the Wireless Network285
Use Wi-Fi Direct298
Enable/Disable Wireless LAN302
Print the WLAN Report303
Network Features307
Print the Network Configuration Report308
Fax Using the Internet (I-Fax)309
Synchronize Time with the SNTP Server Using Web Based Management329
Reset the Network Settings to Factory Default332
Security333
Before Using Network Security Features334
Configure Certificates for Device Security335
Supported Security Certificate Features336
Step by Step Guide for Creating and Installing a Certificate337
Create a Self-Signed Certificate338
Create CSR and Install a Certificate from a Certificate Authority (CA)339
Import and Export the Certificate and Private Key343
Import and Export a CA Certificate346
Manage Multiple Certificates349
Use SSL/TLS350
Introduction to SSL/TLS351
Manage Your Network Machine Securely Using SSL/TLS354
Print Documents Securely Using SSL/TLS359
Use Snmpv3361
Manage Your Network Machine Securely Using Snmpv3362
Use Ipsec364
Introduction to Ipsec365
Configure Ipsec Using Web Based Management366
Configure an Ipsec Address Template Using Web Based Management368
Configure an Ipsec Template Using Web Based Management370
Use IEEE 802.1X Authentication for a Wired or a Wireless Network378
What Is IEEE 802.1X Authentication379
Configure IEEE 802.1X Authentication for a Wired or a Wireless Network Using Web Based Management (Web Browser)380
IEEE 802.1X Authentication Methods382
Use Secure Function Lock 3.0383
Before Using Secure Function Lock 3.0384
Configure Secure Function Lock 3.0 Using Web Based Management385
Scan Using Secure Function Lock 3.0386
Configure Public Mode for Secure Function Lock 3.0387
Additional Secure Function Lock 3.0 Features388
Register an External IC Card Reader389
Send or Receive an Email Securely390
Configure Email Sending or Receiving Using Web Based Management391
Send an Email with User Authentication392
Send or Receive an Email Securely Using SSL/TLS393
Administrator394
Network Features395
Security Features396
Network Security397
User Authentication399
Brother Management Tools400
Mobile Connect401
Airprint402
Airprint Overview403
Before Using Airprint (Macos)404
Print Using Airprint405
Scan Using Airprint (Macos)408
Send a Fax Using Airprint (Macos)409
Mopria ® Print Service410
Brother Mobile Connect411
Print with Near-Field Communication (NFC)412
Wechat Print413
Configure the Proxy Server Settings Using the Machine's Control Panel414
Configure the Proxy Server Settings Using Web Based Management415
Troubleshooting416
Error and Maintenance Messages417
Transfer Your Faxes or Fax Journal Report425
Document Jams429
Document Is Jammed in the Top of the ADF Unit430
Document Is Jammed in the Bottom of the ADF Unit431
Document Is Jammed Inside the ADF Unit432
Remove Paper Scraps Jammed in the ADF433
Printer Jam or Paper Jam434
Paper Is Jammed in the Front of the Machine435
Paper Is Jammed in the Back of the Machine440
Remove Paper Scraps444
If You Are Having Difficulty with Your Machine445
Paper Handling and Printing Problems446
Telephone and Fax Problems452
Other Problems458
Network Problems460
Airprint Problems468
Check the Machine Information469
Reset Your Machine470
Reset Functions Overview471
Routine Maintenance472
Replace the Ink Cartridges473
Clean Your Brother Machine476
Clean the Print Head from Your Brother Machine477
Clean the Print Head Using Web Based Management478
Clean the Print Head from Your Computer (Windows)479
Automatically Detect and Improve the Condition of Print Head Nozzles480
Clean the Scanner481
Clean the Machine's LCD483
Clean the Outside of the Machine484
Clean the Machine's Printer Platen486
Clean the Paper Feed Rollers487
Clean the Base Pad489
Clean the Paper Pick-Up Rollers for Paper Tray #1490
Clean the Paper Pick-Up Rollers for Paper Tray #2492
Check Your Brother Machine493
Check the Print Quality494
Check the Print Alignment from Your Brother Machine496
Check the Ink Volume497
Monitor Machine Status from Your Computer (Windows)498
Monitor Machine Status Using Brother Iprint&Scan (Windows/Mac)503
Correct the Paper Feed to Clear Vertical Lines505
Change the Print Options to Improve Your Print Results506
Pack and Ship Your Machine507
Machine Settings510
Change Machine Settings from the Control Panel511
In the Event of Power Failure (Memory Storage)512
General Settings513
Save Your Favourite Settings as a Shortcut528
Print Reports534
Settings and Features Tables537
Change Machine Settings Using Web Based Management556
What Is Web Based Management557
Access Web Based Management558
Set or Change a Login Password for Web Based Management561
Set up Your Machine's Address Book Using Web Based Management562
Appendix563
Specifications564
Supply Specifications572
To Create a Better Environment573
Brother Help and Customer Support574

Brother MFC-J3940DW - Enable;Disable Wireless LAN

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