In the screen area I get a message saying" "waste

There is a section at the end of this post

https://www.fixya.com/support/t23105023-reset_waste_toner_in_brother

1. If error message still says replace waste toner box, then you need to check the sight glass again. The flag must be horizontal at the bottom of the glass or it is not completely empty.

https://www.google.com/search?q=Brother+HL3170CDW+%22install+waster+toner+box%22++clear+error+message

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Typically you will need to replace the waste toner box. There is usually a difficult to access part of the bottle that is used by an optic sensor to tell when the box is full. Plus toner is very fine and you do not want it getting into the air. Toner will pass through the filter of most vacuums and go back into the air.

Then you mite want to clean the sensor that monitor the waster toner box pull out the waste toner box and look for the area that show clear plastic then look for those area of the machine and blow the old toner from those areas waste toner mite have gotten on the sensor saw they can not see the clear plastic and think that the waste toner cart is still full.

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/normanj_7893313f0751935f

Remove the full waste toner box per manual. Wear breathing protection as there will be toner dust in the air. Place flat in a work area and remove the 6 screws retaining the black box cover and carefully remove cover with box still flat on the work area. Be careful, the box is full of waste toner powder. Dispose of the waste toner by tipping into waste container, being careful not to inhale the powder. Use a blower or vacuum to remove final traces of waste toner from the box and clean all surfaces with a clean cloth. Place the box flat on bench to inspect the clear sight-glass at the front. Inside will be a black flag which should be down on the bottom of the sight glass. If not, there is still waste toner in the front of the box which needs to be shaken or blown out. Replace the cover and 6 screws and replace the waste toner box in the printer. If error message still says replace waste toner box, then you need to check the sight glass again. The flag must be horizontal at the bottom of the glass or it is not completely empty.

When you removed the waste toner bottle, there is a sensor inside the copier. When you remove the waste toner, look to the opening where the top of the waste bottle was, clean that area and return the bottle and turn the copier OFF then ON. Good Luck

The clear section of the waste toner box where that goes inside the machine check that area sensor located there might have toner on it so the printer thinks the waste toner box is full

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/normanj_7893313f0751935f

Hello,

It means that the internal drum unit is full of waste toner and that the drum is worn out too. The people at cannon made the drum unit to last when the waste toner internal compartment is full.

When you buy a new drum the instructions are in the box and very easy to install.

hope it helps

After looking on the net if your printer is under warranty, you should call Kyocera Service Rappresentative or an Authorised Service Centre as Kyocera is not releasing how to empty or clear the waste toner box and if you do you will woid the warranty.

When you open the door to access the toner and waste toner area, you will see a letter "K" on the left side of the waste toner box, and a thumb screw on the right side of the waste toner box. Immediately above the letter "K" there is a raised area in the brown plastic housing. It is between the blue toner cartridge, and the waste oner box. There is a second raised area 2.5 inches at a 225 degree angle below the thumb screw on the right side of the waste toner box.
If you will place your thumbs on the raised areas and your forefingers on the white plastic rear cover of the waste toner box immediately below the raised areas and squeeze your fingers towards your thumbs, the waste toner box will come forward at the top of the box. You can then lift the waste toner box up and out of the printer.
Please squeeze carefully if you think your waste toner box is close to full as you may inadvertently find waste toner all over the place.
The two blue caps on the back of the waste toner box are to keep the waste toner in the waste toner box instead of your carpet.
Installation of the new waste toner box is the reverse of the above procedure. The new waste toner box almost snaps in place.
Here in California waste toner is considered a hazardous material and must be disposed of properly.