Question about Office Equipment & Supplies
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Posted on Jan 02, 2017
SOURCE: Waste Toner Full/ Not Install
Behind the little container for the waste toner there is a sensor that senses whether the toner basket is full or not. If the sensor itself is dirty, it can give a false reading. First try cleaning out the area under the container to see if the switch works. Also make sure the container is clean, because the sensor works by sight, so if it looks full because it's dirty, it will give a false reading. I have heard of people disabling that sensor in various ways, but that can get dangerous to the printer. I can't recall the details on that exact model, but I believe there is a diagnostic of some sort that can test that sensor to make sure it works right to begin with.
Posted on Sep 20, 2006
The sensor for the waste toner tank is dirty or defective. The toner sensor is on the right as you look at the panel just below the liquid crystal display. There is a bump in the clear plastic just below the circular right vent port, that's where the used toner pours in. When you clean out the toner cartridge there is some residue left that makes the sensor think it's still full. Take a piece of paper towel and a small screwdriver (I'm told a bent coat hanger will work, too) and clean the inside of the sensor window inside the used toner cartridge (w/ access through the toner port). It looks like a little raised groove on the right. Just wipe it until it's clear on the inside. The sensor can now see through the window and you should be okay. Otherwise, the sensor may need to be replaced by an authorized Samsung technician. Let me know how it works out!
Posted on Jun 16, 2007
The sensor itself weren´t dirty, but plastics in waste toner tank was bit dusty and sensor couldn´t read through it. So I modded waste toner tank a bit with a knife (took the part away which the sensor uses when reading if it is full or not). And works again beautifullu.
All I have to do know is to take care of waste toner tank manually i.e. checking it every now and then and when it becomes full I throw it away.
Posted on Feb 09, 2008
SOURCE: error c7990 waste toner full
Open the left door.remove the waste toner bottle.It is whitish, odd shaped and directly in the front.throw it in the trash carefully.replace it with a new one.close the door.Good luck!
Posted on Apr 02, 2009
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