It tells me tone life end, I replaced drum unit and toner and it still says life end

asic technical parameters forToner cartridge chip of Xerox Phaser 3450B:
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Version: No area limited
Yield: 5,000-10,000.
Printers Model compatible: Xerox Phaser 3450B
Toner cartridge Model: Xerox 106R00687-BK and Xerox 106R00688-BK.
Manufacturer regulations pages yield ofToner cartridge chip for Xerox Phaser 3450Bis 5,000-10,000 then printer do not print andDrum chip for Xerox Phaser 3450Bhas mission paper pages count.You should resetDrum chip for Xerox Phaser 3450Bcaused by following reasons:
And then, you can choose one in three following plans: replace Toner cartridge, replace Drum chip or reset Toner cartridge chip.
1.Replace new Toner cartridge for Xerox Phaser 3450B:
- If you choose plan replace Toner cartridge then cost is too high. Each Toner cartridge for Xerox Phaser 3450B (Xerox 106R00687-BK and Xerox 106R00688-BK Toner cartridge) costs about $150 - $200
- With replace new Toner cartridge solution is not optimal, because the price is quite expensive.
- When Xerox Phaser 3450B shows errors about computing limits of Toner cartridge chip, you continue to replace new unit.
2.Replace new Toner cartridge chip for Xerox Phaser 3450B :
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- If you choose plan replace Drum chip then cost higher than reset chip. EachToner cartridge chip for Xerox Phaser 3450Bcosts about $6 - $10/color.
- With replace new Toner cartridge chip solution is cheaper replace new Toner cartridge.
- When Xerox Phaser 3450B shows errors about computing limits of Toner cartridge chip, you continue to replace new Toner cartridge chip.
3. Reset Toner cartridge chip for Xerox Phaser 3450B
If you choose plan resetToner cartridge chip for Xerox Phaser 3450Bthen that is best plan. It cheaper than replace Toner cartridge or replace Drum chip
The phenomenonToner cartridge chip for Xerox Phaser 3450Bout of count are printer do not print and display error on the LCD monitor:
-"Drum low", "Drum eppty", on monitor laptop or desktop appear yellow exclamation mark corresponding color, on monitor printer report Drum empty.
-"Tone life end", "Replace new unit"
- "The x unit an error". In that "x" is color of Toner cartridge or code of Toner cartridge
How to fix the errors:"Drum low", "Drum eppty", on monitor appear yellow exclamation mark corresponding color,"Tone life end", "Replace new unit", "The x unit an error"? cheaper, the most effective.
We use unismart device toreset Drum chip for Xerox Phaser 3450B
Unismart is a device reset Drum chip. Unismart can reset for many Drum chip of manufacturers: Samsung, Hp, Canon, Epson, OKI, Xerox ...
Unismart system is designed to offer a complete solution for writing, resetting, testing various chips with the combination of Unismart Box and Unismart chips. Unismart include: unismart box and test head, power adapter, Data wire, flat writer.
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Test head is used for data transmission between Unismart Box and Unismart chips. There are 20 types of test heads designed according to different chip shape, which can be used for operation on all chip models that
current Unismart system supports. Please choose the right test head in accordance with the PCB code. Some PCBs share a same test head, which is clearly indicated in the chip compatible list.

In Case You Still Having Problem Then Follow Us For On :Xerox Printer Support

why toner life end message keep on showing on sp 1200s prints.

Some Brother laser printers have separate consumables - the toner cartridge and the drum unit. From time to time you may need to replace only the drum unit and not the toner cartridge.

The error LED lights up, or an error message shows on a flat screen panel, when the drum unit is near the end of its working life. Use the drum unit until you have a print quality problem, then replace the drum unit with a new one.

Here is the solution that will reset the count and allow your fully functional toner cartridge (the one the printer tells you is empty) to continue to work.

Open the front cover.
Press options button.
Press the start button.
Press + or up arrow button 10 times.
Press set button.

You have to do this with a long pause or the system will reset and you will have to start over.

Good luck.

Depends on the usage of the machine. If hardly used, you should get a years worth. But here's what you can do:

Open front cover

Remove drum unit and toner cartridge assembly

Put drum unit and toner cartridge assembly back in machine, but do no close front cover.

Press Clear/Back
You will get a message "Replace Drum?"
Select Yes to confirm

Replacing the Toner Cartridge
The MFC can print up to 6,000 pages using a high yield toner cartridge. When
the toner cartridge is running low, the LCD shows TONER LOW. The MFC is
supplied with a standard toner cartridge that must be replaced after
approximately 3,000 pages. Actual page count will vary depending on your
average document type (i.e., standard letter, detailed graphics).
Discard the used toner cartridge according to local regulations. If you are not
sure of them, your local Sanitation Department. Be sure to seal the toner
cartridge tightly so toner powder does not spill out of the cartridge. When
discarding used toner cartridges, keep them separate from domestic garbage.
We recommend that you clean the MFC when you replace the toner cartridge.
1 Open the front cover and pull out the drum unit.
Place the drum unit on a drop cloth or large piece of disposable paper to avoid
spilling and scattering the toner.
2 Hold down the lock lever on the right and pull the toner cartridge out of the drum
unit assembly.
Caution
Handle the toner cartridge carefully. If toner scatters on your hands or clothes,
immediately wipe it off or wash it with cold water.
3 Unpack the new toner cartridge. Place the used toner cartridge into the
aluminum bag and discard it according to local regulations.
 Wait to unpack the toner cartridge until immediately before you install it in the
MFC. If a toner cartridge is left unpacked for a long period of time, the toner life
is shortened.
 You can use only a genuine Brother toner cartridge (TN-430 or TN-460), which
is specially formulated to ensure top print quality. Using another brand of toner
cartridge may void your MFC’s warranty. Warranty coverage does not apply to
problems caused by the use of 3rd party Toner, 3rd party Toner Cartridge or 3rd
party Drum unit.
4 Gently rock the toner cartidge from side
to side five or six times to distribute the
toner evenly inside the cartridge.
5 Remove the protective cover.
6 Insert the new toner cartridge in the
drum unit until it clicks into place.
7 Clean the primary corona
wire inside the drum unit by
gently sliding the blue tab
from right to left several
times. Return the blue tab to
the Home position ( )
before reinstalling the drum
unit assembly.
Reinstall the drum unit and close the
front cover.
Replacing the Drum Unit
The MFC uses a drum unit to create print images on paper. If the LCD shows
CHANGE DRUM SOON, the drum unit is near the end of its life and it is time
to purchase a new one.
Even if the LCD shows CHANGE DRUM SOON, you may be able to continue
printing without having to replace the drum unit for a while. However, if there
is a noticeable deterioration in the output print quality (even before CHANGE
DRUM SOON appears), then the drum unit should be replaced. You should
clean the MFC when you replace the drum unit. (See page 21-18.)
Caution
When removing the drum unit, handle it carefully because it contains toner. If
toner scatters and your hands or clothes get dirty, immediately wipe or wash
with cold water.
WARNING
Just after you have used the MFC, some
internal parts of the MFC are extremely
HOT! So please be careful.
The drum unit is a consumable item, and it is necessary to replace it periodically.
There are many factors that determine the actual drum life, such as temperature,
humidity, type of paper and how much toner you use for the number of pages per print
job. The estimated drum life is up to 20,000 pages. The actual number of pages your
drum will print may be significantly less than these estimates. Because we have no
control over the many factors that determine the actual drum life, we cannot
guarantee a minimum number of pages that will be printed by your drum.

To reset the sensor after installing a new toner cartridge follow these steps.
1. With unit powered On, open the front cover.
2. Press the "Options" key. Display will show "Replace Drum?"
3. Press "Start" key.
4. Press 1,0 .
5. Display will show "Accepted" for approximately 2 seconds. Then display will change to "Cover Open".
6. Close cover and see if Toner Life End error message has gone.
Please note that this must be done with a new cartridge so the unit will see that there is toner in the cartridge.

There are two units in the machine, a toner cartridge and a drum unit. The toner clips into the drum and then is inserted in the machine. If you changed the toner and you still get this message, you may have a bad or damaged toner detection sensor.

I have a brother mfc 7840w

I first used the electrical tape trick and that worked for a while. Then got the toner low message again. I then tried the *00 trick, which works as follows:

1. lift lid and open front cover
2. press clear/back. "Replace Drum?" will appear on the screen.
3. Press "*00" it will then read accepted and the toner low error (End of Toner Life) should go away.
4. close it all up and your done.

open front cover, press OPTION button, on the LCD will appear a message "NEW DRUM?" ....DO NOT RESPOND....just type on the keyboard "*00" and there will appear a message "Accepted" and use it in your pleasure.

PS. in any case i blocked with paper labels the viewing windows from transparent plastic on the toner itself....

Mr. Brother, do not try to be smarter than your customer