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What do the symbols and conventions in the user’s guide for the BROTHER MFC-J3940DW mean?

The following symbols and conventions are used throughout the User’s Guide for your BROTHER MFC-J3940DW:

WARNING Indicates a potentially hazardous situation which, if not avoided, could result in death or serious injuries.
CAUTION Indicates a potentially hazardous situation which, if not avoided, may result in minor or moderate injuries.
IMPORTANT Indicates a potentially hazardous situation which, if not avoided, may result in damage to property or loss of product functionality.
NOTE Specifies the operating environment, conditions for installation, or special conditions of use.
Tips Icon (Pencil) Indicates helpful hints and supplementary information.
Electrical Hazard Icon Alerts you to possible electrical shock.
Bold Identifies buttons on the machine’s control panel or computer screen.
Italics Emphasises an important point or refers you to a related topic.
Courier New Identifies messages shown on the machine’s LCD.

How do I access the control panel features on my BROTHER MFC-J3940DW?

The control panel on your BROTHER MFC-J3940DW allows you to access its features. The panel includes:

1. NFC (Near Field Communication) symbol: If your Android™ device supports NFC, you can print from it by touching it to the NFC symbol.

2. Touchscreen Liquid Crystal Display (LCD): Access menus and options by pressing them on the touchscreen.

3. Menu Buttons:

Back: Press to go back to the previous menu.

Home: Press to return to the Home screen.

Cancel: Press to cancel an operation.

4. Dial Pad: Press the numbers to dial telephone or fax numbers and to enter the number of copies.

5. LED Power Indicator: Lights up depending on the machine’s power status. When the machine is in Sleep Mode, the LED blinks.

6. Power On/Off:

– Press to turn the machine on.

– Press and hold to turn the machine off. The touchscreen displays [Shutting Down] and stays on for a few seconds before turning itself off. A connected external telephone or Telephone Answering Device (TAD) will always remain available.

NOTE: If you turn the machine off using the Power On/Off button, it will still clean the print head periodically to maintain print quality. To prolong print head life, provide better ink efficiency, and maintain print quality, keep your machine connected to a power source at all times.


How do I navigate the touchscreen LCD on my BROTHER MFC-J3940DW?

You can access all machine options on your BROTHER MFC-J3940DW by pressing or swiping on the LCD. The Home Screen shows the machine’s status when idle.

Home Screen Icons and Options:

1. Date & Time: Displays the date and time set on the machine.

2. Quiet Mode Icon: Appears when [Quiet Mode] is set to [On]. This mode reduces printing noise but slows down print speed.

3. Modes: Press to switch between modes like [Fax], [Copy], [Scan], [Web], [Apps], [USB], and more.

4. [Ink]: Displays the approximate ink volume. Press to access the [Ink] menu. An error icon appears if an ink cartridge is low or has a problem.

5. [Settings]: Press to access the [Settings] menu.

6. Wireless Status: Shows the wireless network status.

No signal bars Your machine is not connected to a wireless access point/router, or the wireless setting is disabled. Press this button to configure settings.
Signal bars icon The wireless network is connected. The three-level indicator shows the current signal strength.
Signal bars with a cross The wireless access point/router cannot be detected.

7. [Shortcuts]: Create shortcuts for frequently used operations like faxing, copying, and scanning. Three tabs are available with six shortcuts on each tab.

8. Information icon (i): Appears when there is new information from Brother (requires an internet connection). Press to view details.

9. Warning icon (!): Appears when there is an error or maintenance message. Press to view details, then press the Cancel button to return to the Home screen.

IMPORTANT: DO NOT press the LCD with a sharp object like a pen or stylus, as it may damage the machine. DO NOT touch the LCD immediately after turning on the machine, as this may cause an error.


How do I use the on-screen keyboard to enter text on my BROTHER MFC-J3940DW?

When you need to enter text on your BROTHER MFC-J3940DW, a keyboard appears on the touchscreen. The available characters and keyboard layout may differ depending on your country and the function you are setting.

Basic Operations:

– Press the “A 1 @” key to cycle between letters, numbers, and special characters.

– Press the “up arrow aA” key to cycle between lowercase and uppercase letters.

– To move the cursor left or right, press the left or right arrow keys.

Inserting Spaces:

– To enter a space, press [Space] or press the right arrow key to move the cursor.

Making Corrections:

To change a character: Use the arrow keys to highlight the incorrect character, press the backspace key (X), and then enter the correct character.

To insert a character: Use the arrow keys to move the cursor to the correct position, and then enter the character.

To erase characters: Press the backspace key (X) for each character you want to erase. Press and hold the backspace key to erase all characters.


How do I locate the USB and Ethernet ports on my BROTHER MFC-J3940DW?

The USB and Ethernet ports on your BROTHER MFC-J3940DW are located inside the machine. Follow these steps to access them:

1. Using both hands, use the finger holds on each side of the machine to lift the scanner cover (1) into the open position.

2. Locate the correct port (USB or Ethernet) inside the machine.

3. Connect your cable to the port.

4. Carefully guide the cable through the cable channel and out the back of the machine.

5. Gently close the scanner cover using the finger holds on each side.


How do I load different paper sizes into the paper trays and MP tray of my BROTHER MFC-J3940DW?

To load paper into your BROTHER MFC-J3940DW, first fan the stack of paper well. The paper size determines the loading orientation as detailed below:

Paper Tray Loading Guide

Location Paper Sizes How to Load Paper Orientation
Paper Tray #1 / Paper Tray #2 A4, Letter, Executive Adjust the paper guides. Landscape
Paper Tray #1 A5, A6, Photo, Photo L, Photo 2L, Index card, Envelopes Adjust the paper guides. Portrait
Paper Tray #1 / Paper Tray #2 A3, Ledger, Legal, Folio, Mexico Legal, India Legal (Plain and Recycled paper only) Extend the tray using the green slider, then adjust the paper guides. Portrait
MP Tray A4, Letter, Executive Adjust the MP tray paper guides. Landscape
MP Tray A3, Ledger, Legal, Folio, Mexico Legal, India Legal, A5, A6, Photo, Photo L, Photo 2L, Index card, Envelopes, Long Paper (one sheet at a time) Adjust the MP tray paper guides. Portrait

Note:

– Tray #2 is available only for specific models in the series.

– The MP tray is available only for specific models in the series.

– After loading paper, unfold the paper support flap.

– If needed, change the paper size setting in the machine’s menu.


What are the steps to load A4, Letter, or Executive size paper into the paper tray of my BROTHER MFC-J3940DW?

Follow these instructions to load paper in Tray #1. The steps for Tray #2 are very similar.

1. If the paper support flap (1) is open, close it, and then close the paper support (2).

2. Pull the paper tray completely out of the machine.

3. For Tray #2, remove the tray top cover (1).

4. Gently press and slide the paper width guides (1) and then the paper length guide (2) to fit the paper size.

5. Fan the stack of paper well to avoid paper jams and misfeeds. Ensure the paper is not curled or wrinkled.

6. Gently load paper in the paper tray with the printing surface face down in Landscape orientation. Be careful not to push the paper in too far.

7. Gently adjust the paper width guides (1) to fit the paper, making sure they touch the edges of the paper.

8. Make sure the paper is flat in the tray and below the maximum paper mark (1). Overfilling may cause paper jams.

9. For Tray #2, replace the tray top cover.

10. Slowly push the paper tray completely into the machine.

11. Pull out the paper support until it locks into place.

12. Change the paper size setting in the machine’s menu if needed.


How do I load A3, Ledger, or Legal size paper into the paper tray of my BROTHER MFC-J3940DW?

Follow these instructions to load large-format paper in Tray #1. The steps for Tray #2 are very similar.

1. If the paper support flap (1) is open, close it, and then close the paper support (2).

2. Pull the paper tray completely out of the machine.

3. For Tray #2, remove the tray top cover (1).

4. Rest the tray on a flat surface. Push the green slider to the left and then extend the tray until it locks into place.

5. Gently press and slide the paper width guides (1) and then the paper length guide (2) to fit the paper size.

6. Fan the stack of paper well. Ensure the paper is not curled or wrinkled.

7. Gently load paper in the paper tray with the printing surface face down in Portrait orientation. Do not push the paper in too far.

8. Gently adjust the paper width guides (1) to fit the paper.

9. Make sure the paper is flat in the tray and below the maximum paper mark (1).

10. For Tray #2, replace the tray top cover.

11. Slowly push the paper tray completely into the machine.

12. Pull out the paper support (1) until it locks into place, and then unfold the paper support flap (2).

13. Change the paper size setting in the machine’s menu if needed.

CAUTION: Position the machine so the extended tray will not protrude past the edge of the table or desk where someone may bump into it.


How do I load paper into the Multi-purpose (MP) Tray on my BROTHER MFC-J3940DW?

The MP tray is for special print media, such as photo paper, envelopes, or long paper. To prevent dust from entering the machine, close the MP tray when not in use.

1. Open the MP tray. If loading paper larger than A4 or Letter size, pull up the paper support until it locks into place.

2. Gently press and slide the MP tray paper guides to match the width of the paper you are using.

3. Fan the stack of paper well.

4. Gently load the paper in the MP tray with the printing surface face up.

– For A4, Letter, or Executive, use Landscape orientation.

– For A3, Ledger, Legal, Photo, Envelopes, etc., use Portrait orientation.

– When using envelopes, load them with the flap on the left as shown in the illustration.

– For long paper, load only one sheet at a time. Push one sheet into the MP tray until the front edge touches the paper feed rollers. Do not pull up the paper support when loading long paper.

5. Using both hands, gently adjust the MP tray paper guides to fit the paper. Do not press the guides too tightly.

6. Pull out the paper support until it locks into place. For paper larger than A4/Letter, also unfold the paper support flap.

7. Change the paper size setting in the machine’s menu if needed.


What are the printable and unprintable areas on my BROTHER MFC-J3940DW?

The unprintable area on your BROTHER MFC-J3940DW depends on your application settings. The machine can print in the shaded areas of cut-sheet paper only when the Borderless print feature is available and turned on. The Borderless feature is not available for envelopes and 2-sided printing.

Media Top Margin Left Margin Bottom Margin Right Margin
Cut-Sheet 3 mm 3 mm 3 mm (5 mm for Long paper) 3 mm
Envelopes 12 mm 3 mm 12 mm 3 mm

How do I change the Paper Size and Paper Type settings on my BROTHER MFC-J3940DW?

To get the best print quality, you must set the machine for the type of paper you are using. When you change the paper size in the tray, you must also change the setting on the LCD.

1. Press [Settings] > [All Settings] > [General Setup] > [Tray Setting]. Press the tray option you want.

2. Press [Paper Type].

3. Press the up or down arrow to display the paper type options, and then press the option you want. Note that only plain paper can be used in Tray #2.

4. Press [Paper Size].

5. Press the up or down arrow to display the paper size options, and then press the option you want.

6. Press the Home button.


What types of paper and media are recommended for the BROTHER MFC-J3940DW?

For the best print quality with your BROTHER MFC-J3940DW, we recommend using genuine Brother paper. Recommended types include:

Brother Paper

Paper Type Item Code
A3 Plain BP60PA3
A3 Glossy Photo BP71GA3
A3 Inkjet (Matte) BP60MA3
A4 Plain BP60PA
A4 Glossy Photo BP71GA4
A4 Inkjet (Matte) BP60MA
10 x 15 cm Glossy Photo BP71GP

Handling and Use Guidelines:

– Store paper in its original packaging and keep it sealed and flat.

– Avoid touching the shiny (coated) side of photo paper.

DO NOT use damaged, curled, wrinkled, irregularly shaped, extremely shiny, or highly textured paper.

– A paper curl of 2 mm or more may cause jams.

DO NOT use envelopes that are loosely constructed, have windows, clasps, staples, are self-adhesive, or have double flaps.


What is the paper capacity and weight specification for each tray on the BROTHER MFC-J3940DW?

The paper orientation and capacity for the BROTHER MFC-J3940DW are as follows:

Location Paper Size Orientation Paper Types No. of sheets Weight Thickness
Paper Tray #1 Landscape: A4, Letter, Executive Plain Paper, Recycled Paper 250 64 to 120 g/m² 0.08 to 0.15 mm
Portrait: A3, Ledger, Legal, Folio, A5, A6, Envelopes, Photo, Photo L, Photo 2L, Index card Inkjet Paper 20 64 to 200 g/m² 0.08 to 0.25 mm
Glossy Paper 20 Up to 220 g/m² Up to 0.25 mm
Index Card 30 Up to 120 g/m² Up to 0.15 mm
Envelopes 10 80 to 95 g/m² Up to 0.52 mm
Paper Tray #2 Landscape: A4, Letter

Portrait: A3, Ledger, Legal, Folio

Plain Paper, Recycled Paper 250 64 to 120 g/m² 0.08 to 0.15 mm
Multi-purpose tray (MP tray) Landscape: A4, Letter, Executive Plain Paper, Recycled Paper 100 64 to 120 g/m² 0.08 to 0.15 mm
Portrait: A3, Ledger, Legal, Folio, A5, A6, Envelopes, Photo, etc. Inkjet Paper 20 (Up to A4/Letter), 5 (Over A4/Letter) 64 to 200 g/m² 0.08 to 0.25 mm
Glossy Paper 20 (Up to A4/Letter), 5 (Over A4/Letter) Up to 220 g/m² Up to 0.3 mm
Envelopes 20 (Up to A4/Letter), 5 (Over A4/Letter) 80 to 95 g/m² Up to 0.52 mm
Long Paper (MP tray) Portrait Plain, Recycled, Inkjet, Glossy 1 64 to 220 g/m² 0.08 to 0.25 mm

How do I load documents into the Automatic Document Feeder (ADF) on my BROTHER MFC-J3940DW?

Use paper that is within the specified sizes and weights for the ADF. Always fan the pages before placing them in the ADF.

Document Sizes and Weights:

Length: 148 to 431.8 mm (Up to 900 mm when using the long paper function)

Width: 105 to 297 mm

Paper Weight: 64 to 120 g/m²

IMPORTANT:

– DO NOT pull on the document while it is feeding.

– DO NOT use paper that is curled, wrinkled, folded, ripped, stapled, paper-clipped, pasted, or taped.

– DO NOT use cardboard, newspaper, or fabric.

– Make sure documents with correction fluid or ink are completely dry.

Loading Steps:

1. Fan the pages well.

2. Adjust the paper guides (1) to fit the document size.

3. Place your document face up in the ADF until you feel it touch the feed stoppers and the machine beeps.

NOTE: Do not leave any documents on the scanner glass, as this may cause the ADF to jam.


How do I load a document on the scanner glass of my BROTHER MFC-J3940DW?

Use the scanner glass to fax, copy, or scan one page at a time. The ADF must be empty to use the scanner glass.

Supported Document Sizes:

Length: Up to 431.8 mm

Width: Up to 297 mm

Weight: Up to 2 kg

Loading Steps:

1. Lift the document cover.

2. Place the document face down in the upper left corner of the scanner glass, using the guidelines.

3. Close the document cover.

IMPORTANT: If you are scanning a book or thick document, DO NOT forcefully close or press on the document cover.


How do I print a photo from my computer on the BROTHER MFC-J3940DW?

To print a photo from your Windows computer, follow these steps:

1. Select the print command in your application.

2. Select Brother XXX-XXXX Printer (where XXX-XXXX is your model name), and then click the printing properties or preferences button.

3. Make sure you have loaded the correct media in the paper tray. For best results, use Brother paper and load one extra sheet of the same photo paper.

4. In the printer driver window, click the Basic tab.

5. Click the Media Type drop-down list and select the type of paper you are using.

6. Click the Paper Size drop-down list and select your paper size.

7. Select the Borderless checkbox if needed.

8. For Colour / Greyscale, select Colour.

9. In the Orientation field, select Portrait or Landscape.

10. Type the number of copies (1-999) you want in the Copies field.

11. Change any other printer settings if needed.

12. Click OK.

13. Complete your print operation.


How do I cancel a print job on my BROTHER MFC-J3940DW from a Windows computer?

If a print job is stuck in the print queue, you may need to delete it to allow other jobs to print. Follow these steps:

1. Double-click the printer icon in the task tray on your computer screen.

2. From the list, select the print job you want to cancel.

3. Click the Document menu.

4. Select Cancel.

5. Click Yes to confirm.


How do I print multiple pages on a single sheet of paper (N in 1 printing) with my BROTHER MFC-J3940DW?

You can save paper by printing multiple pages onto a single sheet. Follow these steps for Windows:

1. Select the print command in your application and open the printer properties.

2. Click the Basic tab.

3. Click the Multiple Page drop-down list, and then select the 2 in 1, 4 in 1, 9 in 1, or 16 in 1 option.

4. Click the Page Order drop-down list and select your desired page order.

5. Click the Border Line drop-down list and select your border line type (for example, solid or none).

6. Change other printer settings if needed.

7. Click OK and complete your print operation.


How do I perform automatic 2-sided (duplex) printing on my BROTHER MFC-J3940DW?

You can print on both sides of the paper automatically. Ensure the jam clear cover is closed and use regular paper.

1. In your application, open the printer properties.

2. Click the Basic tab.

3. From the 2-sided / Booklet drop-down list, select 2-sided.

4. Click the 2-sided Settings button.

5. Select one of the options from the 2-sided Type menu. Four types of 2-sided binding are available for each orientation:

Orientation Binding Option
Portrait Long Edge (Left)
Short Edge (Top)
Landscape Long Edge (Top)
Short Edge (Left)

6. Select the Binding Offset checkbox if you want to specify the offset for binding in inches or millimeters.

7. Click OK to return to the printer driver window.

8. Click OK again, and then complete your print operation. Note that the Borderless feature is not available with this option.


How do I print a document in booklet format from my BROTHER MFC-J3940DW?

Use this option to print a document in booklet format using 2-sided printing. The pages will be arranged so you can fold the output at the center to create a booklet.

1. In your application, open the printer properties.

2. Click the Basic tab.

3. From the 2-sided / Booklet drop-down list, select the Booklet option.

4. Click the 2-sided Settings button.

5. Select one of the options from the 2-sided Type menu (Left/Right Binding for Portrait, Top/Bottom Binding for Landscape).

6. Select one of the options from the Booklet Printing Method menu:

All Pages at Once: Every page will be printed in booklet format. Fold your printout in the middle to create the booklet.

Divide into Sets: This option prints the whole booklet in smaller individual booklet sets, which is helpful for folding a booklet with a large number of pages. You can specify the number of sheets in each smaller set (from 1-15).

7. Select the Binding Offset checkbox if needed.

8. Click OK to return to the printer driver window.

9. Click OK again, and then complete your print operation. The Borderless feature is not available with this option.


What is Secure Print and how do I use it on my BROTHER MFC-J3940DW?

Secure Print ensures that confidential or sensitive documents do not print until you enter a password on the BROTHER MFC-J3940DW’s control panel. The secure data is deleted from the machine when you turn off the machine.

To Send a Secure Print Job (from Windows):

1. In your application, open the printer properties.

2. Click the Advanced tab.

3. Click the Settings button in the Secure Print field.

4. Select the Secure Print checkbox.

5. Type your four-digit password in the Password field.

6. Type a User Name and Job Name if needed.

7. Click OK, then click OK again and complete your print operation.

To Print the Secured Data from the Machine:

1. On the machine’s control panel, press the left or right arrow to display the [Secure Print] option, and then press it.

2. Press the up or down arrow to display user names, and then press your user name.

3. Enter your four-digit password, and then press [OK].

4. Press the up or down arrow to display the print job, and then press it.

5. Enter the number of copies you want.

6. Press [Start]. The machine prints the data.


How do I change the default print settings for all Windows applications for my BROTHER MFC-J3940DW?

When you change print settings in an application, the changes only apply to documents printed from that application. To change the default settings for all Windows applications, follow these steps:

1. Open the printers folder on your computer:

For Windows 10: Click the Start button > Windows System > Control Panel. In the Hardware and Sound group, click View devices and printers.

For Windows 8.1: Move your mouse to the lower right corner of your desktop. When the menu bar appears, click Settings > Control Panel. In the Hardware and Sound group, click View devices and printers.

For Windows 7: Click the Start button > Devices and Printers.

2. Right-click the Brother XXX-XXXX Printer icon (where XXX-XXXX is the name of your model), and then select Printer properties.

3. Click the General tab, and then click the Printing Preferences… or Preferences… button.

4. Select the print settings you want to use as defaults for all of your Windows programs.

5. Click OK.

6. Close the printer properties dialog box.


How do I scan a document to a folder as a PDF file using the scan button on my BROTHER MFC-J3940DW?

You can scan documents and save them directly to a folder on your computer as PDF files. To make temporary changes to scan settings, use the machine’s Scan button. For permanent changes, use Brother iPrint&Scan.

1. Load your document.

2. Press [Scan] > [to PC] > [to File].

3. If the machine is connected over the network, press the up or down arrow to display the computer where you want to send data, and then select the computer name. If prompted for a PIN, enter the four-digit PIN for the computer and press [OK].

4. To change settings for this scan only, press [Options]. You must have Brother iPrint&Scan installed on the computer to use this feature.

5. Press [Scan Settings] > [Set at Device].

6. Select the scan settings you want to change (such as 2-sided Scan, Colour Setting, Resolution, etc.) and press [OK].

7. To save these settings as a shortcut, press [Save as Shortcut] and follow the LCD instructions.

8. Press [Start]. The machine starts scanning. If using the scanner glass, follow the LCD instructions to complete the job.


How do I scan and save data to a USB flash drive from my BROTHER MFC-J3940DW?

You can scan documents and save them directly to a USB flash drive without using a computer.

1. Load your document.

2. Insert a USB flash drive into the USB slot on the machine.

3. Press the up or down arrow to display the [Scan to Media] option, and then press it.

4. To change the settings, press [Options]. Here you can set defaults or restore factory settings.

5. Select the scan settings you want to change, and then press [OK]. Available options include:

Option Description
2-sided Scan Select the 2-sided scan mode.
Colour Setting Select the colour format for your document.
Resolution Select the scan resolution for your document.
File Type Select the file format for your document.
Document Size Select your document size.
File Name Style Select the order in which the date and counter number appear in file names.
Auto Crop Scan multiple documents placed on the scanner glass and create separate files.

6. Press [Start].

7. If you are using the scanner glass, set the next page and press [Continue]. If there are no more pages, press [Finish]. After you finish scanning, choose [Finish] before removing the USB flash drive.

IMPORTANT: DO NOT unplug the power cord or remove the USB flash drive while the machine is reading the data to avoid data loss or damage.


How do I send scanned data to an email recipient directly from my BROTHER MFC-J3940DW?

You can send scanned data directly from your BROTHER MFC-J3940DW to an email recipient without using a computer. To do this, you must first configure your machine to communicate with your network and an SMTP email server.

1. Load your document.

2. Press [Scan] > [to E-mail Server].

3. Do one of the following to enter the destination email address:

– Press [Manual], enter the email address using the on-screen keyboard, and press [OK].

– Press [Address Book], select the stored email address, and press [OK].

4. Confirm the email address, and then press [Next].

5. To change settings, press [Options]. You can set new defaults or restore factory settings.

6. Select the scan settings you want to change (e.g., Resolution, File Type, Document Size) and press [OK].

7. Press [Start]. The machine begins scanning. If using the scanner glass for multiple pages, follow the LCD instructions.


How do I set up a Scan to FTP profile on my BROTHER MFC-J3940DW?

You can set up a Scan to FTP profile using Web Based Management to scan and upload data directly to an FTP location.

1. Start your web browser.

2. Type “https://machine’s IP address” in your browser’s address bar.

3. If required, type the password in the Login field, and then click Login. The default password is on the back of the machine, marked “Pwd”.

4. Go to the navigation menu and click Scan > Scan to FTP/Network.

5. Select the FTP option, and then click Submit.

6. Click the Scan to FTP/Network Profile menu.

7. Select the profile you want to set up or change.

8. Configure the profile settings:

Option Description
Profile Name Type a name for this server profile (up to 15 alphanumeric characters).
Host Address Type the Host Address (e.g., ftp.example.com) or the IP address.
Username Type a user name (up to 32 characters) with permission to write data.
Password Type the password (up to 32 characters) associated with the user name.
Store Directory Type the path (up to 60 characters) to the folder on the FTP server.
File Name Select a file name from preset or user-defined names.
Quality Select a quality setting for the scan.
File Type Select the file type for the scanned document.

9. Click Submit.


How do I copy a document on my BROTHER MFC-J3940DW?

Follow these steps to make a copy:

1. Make sure you have loaded the correct size paper in the paper tray.

2. Load your document in the ADF or on the scanner glass.

3. Press [Copy].

4. Enter the number of copies (up to 999) using the touchscreen (+ or -), the on-screen keyboard, or the dial pad.

5. Change the copy settings if needed by pressing [Options] or by touching the settings displayed on the screen (e.g., Document Size, Enlarge/Reduce, Tray Select).

6. Press [Mono Start] for a black and white copy or [Colour Start] for a colour copy.

To interrupt copying, press the Cancel button.


How do I perform 2-sided (duplex) copying on my BROTHER MFC-J3940DW?

You can copy onto both sides of the paper. You can copy 2-sided documents automatically up to A3 size using the ADF.

1. Load your document.

2. Press [Copy].

3. Enter the number of copies.

4. Press [Options].

5. Press the up or down arrow to display the [2-sided Copy] option, and then press it.

6. Choose the appropriate layout based on your document:

– To make 2-sided copies from a 1-sided document, press [1-sided to 2-sided]. You can also press [Layout] to choose between Long Edge Flip and Short Edge Flip.

– To make 2-sided copies from a 2-sided document automatically, load your document in the ADF and press [2-sided to 2-sided].

– To make 1-sided copies from a 2-sided document, load your document in the ADF and press [2-sided to 1-sided].

7. Review your settings on the touchscreen, and then press [OK].

8. Press [Mono Start] or [Colour Start].

– If you used the ADF, the machine scans the pages and starts printing.

– If you are using the scanner glass, follow the on-screen instructions to scan each page.


How do I copy an ID card on my BROTHER MFC-J3940DW?

Use the [2in1(ID)] feature to copy both sides of an identification card onto one page while keeping the original card size. Ensure the paper size is set to A4 or Letter.

1. Place your identification card face down near the upper-left corner of the scanner glass.

2. Press [Copy].

3. Enter the number of copies.

4. Press [Options] > [Page Layout] > [2in1 ID Vertical] or [2in1 ID Horizontal]. Alternatively, you can press the [ID] checkbox on the main copy screen for the vertical layout.

5. Press [OK] after reviewing the settings.

6. Press [Mono Start] or [Colour Start]. The machine starts scanning one side of the card.

7. After the first side is scanned, turn over the identification card and press [Continue] to scan the other side.


How do I send a fax from my BROTHER MFC-J3940DW?

To send a fax from your BROTHER MFC-J3940DW:

1. Load your document in the ADF or place it on the scanner glass.

2. Press [Fax].

3. Enter the fax number in one of the following ways:

Dial Pad: Enter the fax number manually.

Call History: Press [Call History] and select a number from Redial, Outgoing Call, or Caller ID History.

Address Book: Press [Address Book] and select a stored number.

4. To change settings for this fax, press Options and adjust as needed (e.g., Fax Resolution, Contrast).

5. Press [Fax Start].

– If using the ADF, the machine starts scanning and sending.

– If using the scanner glass, the machine scans the first page. When the touchscreen displays [Next page?], press [Yes] to scan another page or [No] to start sending the document.


How do I send the same fax to multiple recipients (Broadcasting) on my BROTHER MFC-J3940DW?

Use the Broadcasting feature to send the same monochrome fax to multiple fax numbers at once. Numbers must be stored in the Address Book before they can be used in a broadcast.

1. Load your document.

2. Press [Fax].

3. Press [Options] > [Broadcasting].

4. Press [Add Number]. You can add numbers in the following ways:

– Press [Add Number] and enter a fax number manually using the dial pad. Press [OK].

– Press [Add from Address book]. Press the up or down arrow to display numbers, select the checkboxes of the numbers you want, and press [OK].

– Press [Search in Address book]. Press the first letter of the name, press [OK], press the name, and then press the number you want to add.

5. Repeat the previous step to add more fax numbers.

6. When finished adding all numbers, press [OK].

7. Press [Fax Start] to begin scanning and sending.


How do I choose the correct receive mode for faxes on my BROTHER MFC-J3940DW?

You must choose a Receive Mode depending on the external devices and telephone services you have on your line. By default, the machine will automatically receive any faxes sent to it.

Receive Modes Overview:

  • Fax Only: Automatically answers every call as a fax. Use this for a dedicated fax line.
  • Fax/Tel: Recognizes whether calls are fax or voice calls. It receives faxes automatically and alerts you to voice calls with a special ring (pseudo/double-ring).
  • External TAD: For use with an external telephone answering device (TAD). The machine “listens” for fax tones after the TAD answers and takes over the call to receive a fax. Voice callers can leave a message on the TAD.
  • Manual: Turns off all automatic answering functions. You must lift the handset of an external telephone to answer every call and press buttons to receive a fax.

To set the Receive Mode:

1. Press [Settings] > [All Settings] > [Fax] > [Setup Receive] > [Receive Mode].

2. Press the up or down arrow to display the options ([Fax Only], [Fax/Tel], [External TAD], or [Manual]), and then press the option you want.

3. Press the Home button.


How do I store fax numbers in the Address Book of my BROTHER MFC-J3940DW?

You can store names and numbers in the Address Book for quick access.

1. Press [Fax] > [Address Book].

2. Follow these steps:

a. Press [Edit] > [Add New Address] > [Name].

b. Enter the name (up to 16 characters) using the touchscreen. Press [OK].

c. Press [Address 1].

d. Enter the first fax or telephone number (up to 20 digits) using the touchscreen. Press [OK].

e. To store a second number, press [Address 2] and enter the number. Press [OK].

f. Press [OK] to confirm.

3. To store another Address Book number, repeat these steps.

4. Press the Home button.


How do I send a fax from my Windows computer using the BROTHER MFC-J3940DW (PC-FAX)?

You can send monochrome faxes directly from an application on your computer.

1. Create a file in any application on your computer.

2. Select the print command in your application.

3. Select Brother PC-FAX as your printer, and then complete your print operation.

4. The Brother PC-FAX dialog box appears.

5. Type a fax number using one of the following methods:

– Use the on-screen dial pad to type the number, and then click Add Send Address.

– Click the Address Book button, and then select a member or group.

6. To include a cover page, select the Add Cover Page checkbox.

7. Click Start to send the fax.


How do I receive faxes on my computer with the BROTHER MFC-J3940DW?

You can use the Brother PC-FAX Receive software to view and store faxes on your computer. This feature supports monochrome faxes only.

To Enable PC-Fax Receive on the Machine:

1. Press [Settings] > [All Settings] > [Fax] > [Setup Receive] > [PC Fax Receive].

2. Press [On].

3. The touchscreen displays a message to run the PC-Fax Receive program on your computer. Press [OK].

4. Press [<USB>] or press the name of the destination computer on your network. Press [OK].

5. Press [Backup Print: On] or [Backup Print: Off].

6. Press the Home button.

To Run PC-Fax Receive on Your Computer:

1. Launch Brother Utilities, select your model, click PC-FAX in the left navigation bar, and then click Receive.

2. Confirm the message and click Yes. The PC-FAX Receive icon will appear in your computer task tray.

When your computer is on and the software is running, your machine will automatically transfer received faxes to your computer.


How do I resolve the “B&W Print Only” error message on my BROTHER MFC-J3940DW?

Cause:

One or more of the colour ink cartridges have reached the end of their lives. You can use the machine in monochrome mode for approximately four weeks, depending on the number of pages you print.

Action:

Replace the empty ink cartridges. Although you can temporarily use the machine for certain functions in black and white, you may not be able to use the machine at all if you unplug it or remove an ink cartridge before replacement.

While the message is displayed, the following operations work in monochrome:

Printing: Only if the media type is set to Plain Paper and you selected Greyscale in the printer driver.

Copying: Only if the paper type is set to Plain Paper.

Faxing: The machine will receive and print faxes in monochrome.


What should I do if my BROTHER MFC-J3940DW displays a “Document Jam” error?

Cause:

The document was not inserted or fed correctly, or the document scanned from the ADF was too long.

Action:

1. Document Jammed in the Top of the ADF Unit:

a. Remove any paper from the ADF that is not jammed.

b. Open the ADF cover.

c. Remove the jammed document by pulling it upwards.

d. Close the ADF cover correctly by pressing it down in the centre.

2. Document is Jammed in the Bottom of the ADF Unit:

a. Lift the ADF document support and remove the jammed paper.

3. Document is Jammed inside the ADF Unit:

a. Lift the document cover.

b. Pull the jammed document out to the right.

c. Close the document cover.

After clearing the jam, press the Cancel button on the touchscreen.


How do I clear a paper jam in the front of my BROTHER MFC-J3940DW?

If the LCD displays a “Jam Front” or “Jam Front/Rear” message, follow these steps:

1. Unplug the machine from the electrical socket.

2. Pull Tray #1 completely out of the machine.

3. Slowly remove the jammed paper (1) from the opening.

4. Using both hands, use the finger holds on each side of the machine to lift the scanner cover into the open position.

5. Slowly pull the jammed paper out of the machine.

6. IMPORTANT: If the print head is in the right corner, you cannot move it. Close the scanner cover, reconnect the power cord, open the cover again, and then hold down the Cancel button until the print head moves to the center. Then unplug the machine and remove the paper.

7. Check the corners of the machine (1) and (2) for any pieces of paper and remove them.

8. Gently close the scanner cover.

9. If the message was “Jam Front/Rear”, open the Jam Clear Cover at the back of the machine and remove any paper.

10. Slowly push Tray #1 completely into the machine.

11. Reconnect the power cord.


How do I clear a paper jam in the back of my BROTHER MFC-J3940DW?

If the LCD displays a “Jam Rear”, “Jam Tray2”, or “Jam Tray3” message, follow these steps:

1. Unplug the machine from the electrical socket.

2. Pull all paper trays completely out of the machine.

3. Open the Jam Clear Cover (1) at the back of the machine.

4. Slowly pull the jammed paper out of the machine.

5. Close the Jam Clear Cover.

6. Lift the scanner cover into the open position.

7. Slowly pull any jammed paper out of the machine.

8. Check the corners of the machine for any remaining pieces of paper.

9. Gently close the scanner cover.

10. Slowly push all paper trays completely into the machine.

11. Reconnect the power cord.


Why are there white lines in my text or graphics, or dark lines at regular intervals on prints from my BROTHER MFC-J3940DW?

White lines appear in text or graphics:

– The print head may be clogged. Clean the print head from the machine’s control panel.

– The paper feed may need adjustment. Run the paper feed correction procedure.

– Try using the recommended types of paper.

Dark lines appear at regular intervals:

– The paper feed may need adjustment. Perform a paper feed correction to clear vertical lines.

To prolong print head life and maintain quality, it is recommended to use the Power On/Off button to power down the machine rather than unplugging it. This allows for periodic, but less frequent, cleaning of the print head, which consumes less ink.


How do I replace the ink cartridges on my BROTHER MFC-J3940DW?

When the machine’s LCD displays a message that an ink cartridge needs replacing, follow these steps:

1. Open the ink cartridge cover (1) on the front of the machine.

2. Press the lock release lever to release the ink cartridge for the color indicated on the LCD, and then remove the cartridge from the machine.

3. Open the new ink cartridge bag and take out the ink cartridge.

4. IMPORTANT: DO NOT touch the ink cartridge in the area indicated by a “1” in the manual’s diagram, as this can prevent the machine from detecting the cartridge.

5. Quickly shake just the black ink cartridge horizontally 15 times before inserting it.

6. Insert the new ink cartridge in the direction of the arrow on the label. Each color has its own correct position.

7. Gently push the area marked “PUSH” until the ink cartridge locks into place, and then close the ink cartridge cover.

The machine will reset the ink dot counter. If the machine does not detect the cartridge, remove it and reinstall it slowly until it locks into place.


How do I clean the scanner glass and ADF on my BROTHER MFC-J3940DW to improve copy and scan quality?

If you see vertical lines or streaks on your copies or scans, the scanner components may need cleaning.

1. Unplug the machine from the electrical socket.

2. Lift the document cover (1).

3. Clean the scanner glass (2) and the white plastic (3) with a soft, lint-free cloth moistened with water.

4. In the ADF unit, clean the white bar (1) and the glass strip (2) with a soft, lint-free cloth moistened with water.

5. For your model, open the scanner glass cover (1) and clean the white bar (2) and the glass strip (3) as well.

If you feel dirt or debris, repeat the cleaning process. To test, make a copy after each cleaning attempt. After the glass strip is cleaned, the vertical line should be gone.


How do I reset my BROTHER MFC-J3940DW to factory settings?

You can reset some or all of your machine’s settings to the original factory settings. It is strongly recommended to perform an “All Settings” reset when you dispose of the machine.

Available Reset Functions:

  • [Machine Reset]: Resets all settings you have changed, but the Address Book, Fax Reports, and Call History will remain.
  • [Network]: Resets the print server back to its default factory settings (including Password and IP Address). Unplug the interface cable before selecting this.
  • [Address Book & Fax]: Resets Address Book, programmed fax jobs, Station ID, Memory Receive Options, Reports, and fax history.
  • [All Settings]: Resets all machine settings to the factory defaults. Unplug the interface cable before selecting this.

To perform a reset:

1. Press [Settings] > [All Settings] > [Initial Setup] > [Reset].

2. Press the reset option you want to use.

3. Press [OK] for two seconds to reboot the machine.

4. Wait until the machine restarts completely.


How do I pack and ship my BROTHER MFC-J3940DW?

When you need to transport the machine, use the original packing materials. Not allowing the machine to “park” the print head before unplugging can lead to print problems and possible damage.

1. Unplug the machine from the electrical socket.

2. Lift the scanner cover and unplug the telephone line cord and any interface cables.

3. Remove the orange protective part from its storage place inside the machine.

4. Gently close the scanner cover.

5. Open the ink cartridge cover.

6. Press the ink release levers to release the ink cartridges and then take them out.

7. Install the orange protective part.

8. Close the ink cartridge cover.

9. Wrap the machine in the bag.

10. Pack the machine in the original carton with the original packing material. Do not pack the used ink cartridges in the carton.

11. Close the carton and tape it shut.


How do I save my favorite settings as a Shortcut on the BROTHER MFC-J3940DW?

You can save frequently used settings for Fax, Copy, Scan, Web Connect, and Apps as a Shortcut for quick recall.

1. If the Home screen appears, press the [+] [Shortcuts] icon.

2. Press a tab from [1] to [3].

3. Press a [+] icon where you have not yet added a Shortcut.

4. Press the up or down arrow to display the function you want to create a shortcut for (e.g., [Copy]), and press it.

5. Press [Options].

6. Press the up or down arrow to display the available settings, and press the setting you want to change.

7. Press the up or down arrow to display the available options for that setting, and press the option you want.

8. Repeat the previous two steps until you have selected all the settings for this Shortcut. When finished, press [OK].

9. Press [OK] again.

10. Read and confirm the displayed list of settings you have selected, and then press [OK].

11. Enter a name for the Shortcut using the on-screen keyboard, and then press [OK].

How to use the PDF below:
* Touchscreen: Swipe up/down with-in the PDF to scroll and pinch or spread with two fingers to zoom.
* Mouse: While your mouse is hovering over the PDF, use the mouse wheel to scroll and click on the – / + buttons at the bottom of the PDF to zoom.

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CLICK HERE TO DOWNLOAD BROTHER MFC-J3940DW (01) PDF DOCUMENT


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