Question about Brother MFC 7420 All-In-One Laser Printer
I have opened the back door to see what the problem might be. there are two blue tabs and a yellow triangle sticker. I don't understand what the other repair folks are talking about---photo switches ---where are they? what do they look like? This all started because of a persistent black stripe on my faxes and when I copy. I also cannot fix that. I have replaced the drum once this year after getting 3 years out of the original. Do I need a new drum? I can't figure out what I am supposed to clean.
The black lines sound like it may be a contaminated fuser roller. Surface of one of these rollers is a Teflon coat. In time this wears away and the end result is toner build up that eventually transfers to the paper.A Photo Sensor is a switch that monitors the path of the paper thru the cycle of paper pick up all the way to exit of the paper from the out put. These switches open and close. when there is a paper jam and not all of the paper is removed fragments of the removed paper can be left behind. this can actually trigger an error of door open/close cover. The mentioned "two blue tabs" are the release point of the fuser upper roller that you toggle to move the roller up or release the downward pressure from the bottom roller. These are used to clear a paper jam . If you have access to a small flash light, look carefully in that area for fragments of paper. The "yellow triangle " is part of the warning label of the fuser cover stating that this is an extremely hot in temperature piece and to handle with care or touch with the power off and wait to cool prior to any inspection,. If there is no signs of fragments of paper in the area, a "sensor" flag might be stuck and blocking the photo sensor's light path, triggering the " Back Cover open" error.....hope this helps,Steve
Posted on Jan 28, 2008
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
Here's a link to this great service
Posted on Jan 02, 2017
Tips for a great answer:
Apr 16, 2014 | Bruder MAN TGA Container Service Truck
Feb 07, 2011 | HP LaserJet 1320 Printer
Jan 16, 2011 | Panasonic PT-50LC13 50" Rear Projection...
Sep 26, 2009 | Sears Craftsman LiftMaster Chamberlain...
Aug 30, 2008 | Brother HL-2030 Laser Printer
Jul 12, 2008 | Konica Minolta magicolor 2430 DL Laser...
May 28, 2008 | HP LaserJet 1012 Printer
Mar 12, 2008 | HP LaserJet 1320n Printer
Mar 11, 2008 | Konica Minolta magicolor 2430 DL Laser...
217 people viewed this question
Usually answered in minutes!
Step 2: Please assign your manual to a product: