Question about Brother MFC 7420 All-In-One Laser Printer

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Toner low, tone life end

Installed fully re-filled toner. After about 300 pages, display started showing toner low. After printing about 15 pages, display started showing Toner Life End. Took toner out. Shook it a little, re-inserted. It printed about 2 pages and display started showing Toner Life End. Checked the toner, it is full. Resetted the switch. Problem keeps repeating. Any solutions?

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  • bette1 Feb 05, 2008

    We have reinstalled the new toners 2 different times. The printer will print a few pages, then it will say that the toner life is low or toner life has ended. At this point we take out the toner cartridge and shake it up and put it back in the printer and go through the same process a few hours later. I looked for the lever to slow the printer life and did not find it. Please send me some kind of help. Thank you Robette!robette2000@yahoo.com

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There is a gear on the left hand side of the toner to reset the toner count this can cheated be rewinding it. Yes the design is to stop the refillers or at least slow them down a bit. If this fails purchase a new genuine toner but I have seen problems with the switch that resets the toner (Either the spring on the switch has popped off or the main board has failed).

Posted on Jan 21, 2008

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Posted on Jan 02, 2017

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Replace drum in xerox phaser


asic technical parameters forToner cartridge chip of Xerox Phaser 3450B:
chip-b.jpg" ]
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 :
khe-chip-b.jpg" ]
- 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.
unismart1.jpg" ]
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

Jan 23, 2014 | Xerox Phaser® 860, 8200 Standard Capacity...

1 Answer

Installed new cartridge and comming up machine won't regognise it saying tonner life end install new cartridge


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.
Try this. We are Brother authorized.

Apr 15, 2010 | Brother MFC-7420 Laser Printer

1 Answer

Tone Exahusted so Quickly


You need a reset fuse. 63ma

Also, there are about 2-3 cycles in each toner cart before bigger things start to happen like toner leakage, or streaking on the drum, etc. When that happens, I would be happy to buy the empties or to remanufacture them for you


Nov 25, 2009 | Samsung ML-1640 Monochrome Laser Printer

1 Answer

It says toner life end and it prints just fine


The toner life end message means the toner is getting low. It will continue to print without any problem. Eventually you will see the print starting to get light in spots. If it is a new cartridge, the toner level sensors are probably dirty.

Oct 08, 2009 | Brother MFC 7420 All-In-One Laser Printer

1 Answer

Had toner life end message. Replaced toner and drum with oem,machine reset but now just making blank copies. Tried to print internal report that's blank too


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.

Aug 01, 2009 | Brother IntelliFax-2820 Laser Fax

1 Answer

Lexmark e250dn printer, toner light is flashing, new cartridge


Could be photoconductor at end of life.

You shoul still be able to do a printer test print (press the arrow button).

Look on the printed pagesfor Toner AND Photoconductor.

These show as OK when new or very low count, and 100% when fully used.

If the toner is showing as 100% when you've just replaced it, either the chip is faulty, the wrong one, or if the cartridge is a remanufactured one possibly nor been replaced.

Jan 19, 2009 | Lexmark E250dn Laser Printer

3 Answers

Change of toner


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.

Jun 08, 2008 | Brother MFC 7420 All-In-One Laser Printer

3 Answers

Toner end life


it is printing with this blinking or not?

Jan 04, 2008 | Samsung ML-2510 Laser Printer

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