I also had problems scanning legal size documents with a Brother MFC-7440N. The documents would scan but would not come out complete. A large portion of the text would always be left out and only an image of the size of regular page size would come out. I knew it had to be something with the settings, so after experimenting with my MFC-7440N I came to the conclusion that I was not going to find the solution on the actual machine. I had a "Hunch" that I would find my solution by connecting the printer to my laptop computer and use the software that came with it. After a couple of minutes I was able to scan Legal Size documents in a breeze... I should of done this months ago. All scanned docs came out in full size.
So I took some screen shots to post them up here to let everyone know how to scan legal size documents since I noticed that people are having trouble just like I did. With this instructions you will also be able to scan any available size documents with a Brother MFC-7440N. I will also guide you step by step. After step 4 the remainder steps are OPTIONAL unless you need to change the color or picture file types. Okay, here we go!
Make sure your MFC-7440N is connected to your computer and the computer has the software installed that came with the printer.
Place the Legal Sized documents/papers that you want to scan on the Paper Feeder Scanner located on the most upper area of the machine.
On your computer, go to START then to DEVICES and PRINTERS, or CONTROL PANEL then DEVICES and PRINTERS. Locate the icon of your MFC-7440N. If its not your DEFAULT printer make it the default one. Then RIGHT Click on the icon. A menu will pop open. Locate START SCAN and click it.
A small window will open that will give you various options to scan a multitude of sizes and different settings. Locate where it says SOURCE. The default setting might be FLATBED meaning the flatbed scanner of your machine. Click the drop down menu and select FEEDER. By selecting the feeder option your computer will tell your machine to use the automatic paper scanner located on the most upper area of your machine.
Locate PAPER SIZE. Click on the drop down menu and then select Legal 8.5 x 14 inches (216 x 356mm).
If your documents are already located in the feeder you can now go ahead and click SCAN and your documents will begin to scan.
Your scanned documents will be saved in a file folder in your computer and that file will pop open for your convenience once all documents are scanned.
If you need to change COLOR or Black and White setting plus Picture File Types such as Jpeg or Tiff just click on their respective drop down menu before clicking SCAN.Here are some pictures to help me illustrate it.
I hope you find this helpful.
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