Question about Samsung CLP-550N Laser Printer

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"waste toner tank full/not installed"

My printer show "waste toner tank full/not installed". What can I do?

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  • dexius Jul 14, 2008

    My Samsung 550N says that the waste toner container is full even though it's brand new. 


    A printer maintenance guy said this was a known problem; the waste toner container sensor in this printer was replaced by Samsung without charge if it happened during the warranty period. My printer is more than 2 years old though and the advice was therefore to dump the printer and buy a new one(!) since repairing it would cost more...


    I wonder if anyone knows a way to fix this problem on your own? I've been advised to remove and replace the waste toner container a couple of times but this hasn't solved the problem. Grateful for any advice on this..

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I have had the same problem. At first I could clean the waste container and it would be happy. After a while I needed to get a new waste container.
Then I needed to clean the LED. After that it would run for about an hour then come up with the error. Today I couldn't get it to go at all without the error unless I manually lifted the black flap with the waste toner cartridge out.
So I pulled it apart again and had a look at the transmitting LED through my digital camera (It allows you to see the infrared beam from the LED) and it was very dull.
I replaced it with another infrared LED that I had lying around the place and the new one was considerably brighter. Seems that the LED itself has been failing. Will see how this one goes.
To replace the LED. I opened the top cover and both end covers.
The last top cover is held in with 2 screws, remove those and lift it at the screw end and it flips off.
Remove the two screws on the top of the front cover.
Remove the paper tray and then remove the waste toner cartridge. Remove the 7 screws there that you can see holding the plastic on. I also removed the two screws that hold the plastic straps that stop the side from dropping down.
With the screws out, there are two little nubs on the bottom of each end of the front cover that hold it at the bottom, ease the cover off these as you pull the front cover forward. It will come off easily, no undue forcing it. Beware that the front display wire is attached, no need to disconnect, you can put the front cover on top of the printer out of the way.
You will then see the LED detector, it has a screw in the middle securing it, remove the screw and then it unclips out.
In the back of it are the Tx and Rx LED's. The TX LED is clear, the Rx LED is dark. The PCB is marked with which is which as well.
The problem one is the clear TX LED. Another infrared LED with a forward drop of about 1.2V is required, not sure what wavelength it is, but I sure a general purpose infrared LED from a hobby electronics store will do the trick. Unsolder the LED, fit new one. Make sure it is around the correct way (the flat side is marked on the PCB). Reassemble your printer and you should be good to go.
If you don't feel comfortable pulling you printer apart and attacking it with a soldering iron, then I am sure an electronic repair shop could do it for you if you show them this message. I would imagine that they could get the job done in under an hour, took me 30 minutes.

Posted on Dec 14, 2008

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Dr. P,
Printer will display "Waste Toner Tank Full/Not Installed" error message if the waste tank is full of toner or not installed.
  • Open the waste tank door and check for the waste toner tank.
  • If the tank is full or not intalled, install a new tank.

If you have user guide, it will show you how to install the waste toner tank.

Sometimes you will also get this error message if the Waste Toner sensor is covered with toner powders.
  1. Remove your waste tank and look for the black plastic on the right side after removing the waste tank.
  2. You sould find small openings on each side in the black casing.
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for user manual just click here:

If this solution works, please don't forget to rate it fixya

For any more question just ask me.

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The "waste tank" is located behind the front panel that has the SAMSUNG name on it. Press on the upper corners of this panel and it will open up to reveal a clear plastic tank on the right side.

This tank pulls out easily and has two holes for excess toner to flow into it.

Look at the side of the tank that has the holes. You should see a part of the tank that extends out from the tank but ends in a clear square. The waste tank sensor "looks" thru this clear plastic square to determine if the tank is full. I.e. if toner is in this area and you cannot clearly see thru both sides, the sensor will tell the printer that the tank is full and needs to be changed.

If the tank is not full, use a long cotton swab and clean out the inside of this area. Once you can see thru both sides, carefully replace the tank back into the printer and turn the printer back on.

If done properly, the error should go away and you should be able to continue printing. I have doen this and it works fine.

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The sensor could be bad and causing the issue. If this is the case, it may be cheaper to purchase a new printer - CLP-620 ND is a duplex, networked color laser jet that is selling from frys.com for $315.

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