You need to replace the waste toner tank.Open the front cover and on the left side in the gray waste toner tank. You can pull it out and replace it with an empty one or you can try to empty it and reinstall the tank. If you empty it, you have to make sure the parts of the tank where the sensor checks to see if it is full is clean. Otherwise it will generate the same error again. You need a cotton swab to clean the sensor ports of the tank so that the light can shine into it. Hope this helps.
Tried everything, this is the simplest and it WORKS on Samsung CLX-3175: fill up the bottle half-way with alcohol, shake it to dissolve all ink, pour it out, let it dry over nite. The bottle looks completely clean and clear like new.
Cleaning my tank had no effect so decided it was the sensor.i changed the sensor on the imaging for a spare one...no luck, so it must be the other end(in the printer casing) ...the light emmiter that the sensor is trying to "sense". instead of changing this... remove imaging unit, remove tank and toners, undo 2 screws inside where the toners go and unclip the outer casing of the unit. in there youll see the sensor, remove it by uncliping the circuit board, srtip some insulation of both wires and twidt together, insulate with tape , plug back in , put all back together...worked a treat for me.
SOURCE: waste toner tank
A few things can cause this.
The way the printer determines whether the waste tank is full is via 2 optical sensors, one on either side of the tank. You'll see a rounded bulge on one end of the tank - the sensors are on either side of that, when the tank is installed. Under normal operation, light passes through that and the printer reads it as meaning the tank is not full, until the tank fills far enough to fill that bulge, and thus block light and give a tank full reading.
If the tank gets too dirty, not enough light passes through and it gives false tank full readings. So the first thing to try is cleaning the tank with soap and water. Make sure that area is as clear as possible.
If that doesn't work, it has also been reported that the sensors themselves are unreliable. I am told Samsung will replace the sensor for free if it's been less than 3 years. If you call them, insist that it is the sensor that is the problem, or they will try to get you to replace the waste bin, at your expense, first: 1-800-726-7864.
Alternatively, you can remove the sensor from one side, and reattach it to the other side - putting the two sensors in contact so that they always read an empty waste tank. Do this at your own risk, however, as you will have to check the tank regularly and make sure it doesn't overflow. Doing this bypasses the sensor, so there is no longer any warning if your tank is overflowing.
Hope some of that helps you.
-Dyllan
SOURCE: waste toner tank full/not install keep displaying
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.
SOURCE: Error Message--Waste Toner Tank Full/Not Install
I did cleaning, drying, etc. as mentioned by caaa, but no result. After noticed a square hole on a waste tank which has to slightly push the black plastic arm in printer by inserting the waste tank. But there is missing something (I don't know the reason, if dropped out, or...) that is over hole about 5mm. Fix this missing distance with small wire (e.g. chipped proper rounded part of paper clip) fitted into the hole. Carefully check if the wire is not big too much, not to brake the arm. Works until now.
SOURCE: Dell 1235cn Laser All-in One Printer - Waste Toner Bin issue
Wash it out with rubbing alcohol and let dry. Apparently there is a light sensor that will throw up this error if the bin is dirty.
SOURCE: Replace/Install toner waste bin error
The toner box is probably full. The toner box is a clear box on the left side when you open the front cover. The box has the labels Y, M, C, and K on it. Pull it out using the tab at the bottom. find a place to empty it. You can do this by turning it upside down and gently tapping it. If the box is full some toner may be outside of the box causing the sensor to be blocked even after it is empty. You may want to clean the box, toner cartriges and inside the cavity with qtip, tissue paper (without lotion), or air.
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