Question about Brother MFC3240 Multifunction InkJet Printer

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The scanner function on my Brother 7420 multifunction machine suddenly is putting a black line down the scanned image of the page. Can I correct this myself or do I need to take it for service?

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True u need to take it to the service personnel. But first check if it is the same with the photocpying. if it the same then u have to clean the lamp and if it persists the u haveto change the lamp.

Posted on Oct 11, 2009

  • moses semanda Oct 11, 2009

    True u need to take it to the service personnel. But first check if it is the same with the photocpying. if it the same then u have to clean the lamp and if it persists the u haveto change the lamp.

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My Brother MFC-7420 Printer always prints black lines and splotches down the left side of my paper. This happens whether I'm scanning or printing from my PC. When I looked at my drum, it appears a


If you are seeing vertical streaks/black lines your primary corona wire is dirty and or the fax scanner may be dirty.
1)To clean the corona wire you take the drum unit and toner cartridge and place it on disposable paper to avoid spilling.
2) Clean the primary corona wire inside the drum unit by sliding the blue tab from right to left several times.
3) Return the blue tab and snap it into the home position.
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Scanning images onto mac


The scanner driver is separate from the printer driver. This link will take you to the downloads page of Brother-usa.com, where you select the machine family, then the specific model. Click the downloads link at the bottom, then, and you'll get to a page to select what you want and for what OS. Brother lists Mac os's from 9.x to 10.6.
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You just didn't set up the scanner function, please reinstall the software and restart before you use the scanner.

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There is most likely something on your scan glass that is blocking the scanner. Clean of both pieces of glass that are there when you flip open the ADF, or top cover. Try to copy again. If it is still there then there is either something on the scanner piece that moves back and forth to scan or one of your scan LEDs is burnt out and the scanner will have to be replaced.

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1 Answer

I have a brother mfc-7420 flatbed and am trying to scan multiple pages through the automatic feeder but it only scans whats on the flatbed? Is the feeder only for copies and not for scans? Anything i can...


First install everything, than go to my computer at the bottom u will have Scanners and Camera, click on Brother MFC-7420 USB
Than if the window pop ups than click on Microsoft Scanner and Camera Wizard
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And put ur Scan paper with the side that u wanna scan FACE UP in the FAX tray which is on the Top or all in one Printer

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