Prepare New Imaging Unit Samsung

[Cori Lenon]

Wehave a Samsung M267x 287x Series printer. As per my past experience with monochrome laser printers, we refill the toner which is rated 3k 4 times and then get a new toner. Reason, a new toner costs 40$ vs a refill that costs 4$.

Under machine settings in the web-utility, I can force the printer to keep printing. Coming to the main question, is it safe to run a 9k imaging untill 12k or should I stop printing and get the new imaging unit?

I moved imaging unit, transfer unit and fuser unit from almost unused printer to more used with high imaging unit counter value. But the imaging unit counter value did not change and remaining life is ending. How to reset imaging unit counter? Or do I need to move something more from the unused printer.

As far as i know the changing of the units will not change the readings from the one to the next machine.let me explain a bit better.If the one unit is 50% of life in the one machine and i replace it to a machine that show 10% then the unit will be seen as 10%.The only way to get the reset is by replacing the unit and the reset will be done on the machine formatter board.Hope this will answer your question.

Did you mean that I might find some reset method on the board? I did not. From Tech Menu the Imaging unit count could not be reset. Printing will soon stop - there is only 6 % left and message: Prepare imaging unit. Anything else to do?

This article describes how to get your Samsung printer working again without shelling out a fortune for a new Imaging unit. If you just want to know how to do do it, skip to the next step, the rest of this step is just an explanation of how I figured this out! Note that this worked for my CLP-365w printer but it may work for other similar Samsung models too. It will certainly work for any printer that uses the CLT-R406 imaging unit but I suspect they all use a similar technique to reset the page count.

Samsung produce a very nice range of domestic laser printers for the home, they're quite cheap too. However, they have engineered in some cunning ways to make money. All of the consumables for these printers (toners and the image drum) need to be replaced when the unit tells you, otherwise the printer will not print. So even if you manually fill up the toner cartridge, the printer still "thinks" it is empty and will refuse to print. I am not going to cover manual toner refilling here but there are plenty of guides around.

The other "consumable" on these printers is the so called "Imaging unit". It's a drum which is an essential component in any laser printer and it is used to transfer ink to the page in the printing process. To be fair, this component is a consumable, it will wear out eventually causing blurry or streaky pages etc. These Samsung printers have a kind of printing "odometer" that records how many pages have been printed using the current imaging unit. They also have a built in hard coded lifespan of about 5000 pages (i think...). So once we hit this page count, the red light of death illuminates on your printer and we get a lovely message saying "Warning, prepare new imaging unit". At first I thought, "ahhh its ok, it's just a warning, I'll carry on printing until it really needs replacing" - wrong. The printer literally won't print anything until you replace the imaging unit. So, I look online - wow 75! What a rip off! The ink cartridges for these things cost a bomb (so far I have just paid up but I will probably start refilling soon) but this is beginning to take the p*ss I thought!

I decided to take the Imaging unit out and examine it - surprise surprise, it looked perfect, not a single blemish or mark, hardly any dirt (not sure what a knackered one looks like to be fair, but this looked brand new to me). Also, the pages printed prior to this were perfect as well, there as never any sign of degradation.

A quick google search reveals many places offering to sell you a "reset chip" for around 15 with instructions, it's like magic, you just unfold it, plug it onto the imaging unit, close the lid and taadaa! The printer "thinks" you've bought a shiney new imaging unit an happily prints away.

I was about to punch in my card number and be done with it but then I watched the instruction video and took a closer look, I could see that this "reset chip" was really just a 30p resistor stuck to a piece of plastic. Cunningly, all of the photo's and videos of these chips seem to show it covered in a black lacquer so you can't see the coloured ribbons on them. Of course they've covered this up, they wouldn't want their little secret getting out! Well sorry guys, I know your game! These people are almost as bad as Samsung, packaging a 30p resistor up and selling it for 15!

After a bit of research, I discover how these things work. The imaging unit has a small removable plastic housing with 2 resistors in, one 200k ohm, and one much weaker 56ohm fusible type resister, in parallel. When it first powers up, the printer detects a low resistance. The printer passes a current though the drum unit and the small "fuse" resistor blows. From now on, when the printer powers on, it only detects the 200k resister so it knows this is not a new drum so the printer counts all the printed pages from now on. 2 years down the line, we hit the magic number and the printer stops working because it "thinks" the drum is now useless. So you go out and buy a new drum, it has the same 2 resistors inside, only the smaller one is not blown. You plug it in, the printer sees a low resistance again, it knows there is a new drum, so it resets the page count and then blows the new fuse and the cycle repeats. Now, if instead of buying a new drum unit we just replace the fuse, we can "trick" the printer into thinking we have a new drum unit. Simple. This is exactly what the 15 kits are doing, they are simply a new 56ohm fused resistor which you stick across the terminals.

Older articles and guides show it having two, but mine only had one. I guess it doesn't need a fuse when it is first manufactured because the page count is already 0. At some point Samsung stopped factory fitting the second resistor.

Either way, it will definitely have a 200k Ohm resistor and optionally a blown fusible 56 ohm resistor. If you wish, you can remove the blown fuse resistor (if you can identify it). It doesn't matter if you leave it in place though.

You should be able to get the resistor from an RS or Maplin (Radio Shack in the US maybe?) for about 30 pence or you could order one online. Heck you could probably salvage one from a broken electrical device - in fact some have reported this DIY fix working with 47ohm resistors - so if you do try to salvage one, it might just be that you need a very weak resistor, not specifically a 56 ohm.

We need to get that new resistor in there with the 200k ohm briefly and power the printer on. I suppose you could solder it in permanently, this will basically reset the page count every time the printer turns on. But this is designed to be a fusible resistor that blows, so I don't know if there is any concerns about this component overheating if you do that. In my case, I just rammed it in the housing roughly and twisted the component legs around the existing one to form a connection. In the picture, the blue resistor is the 56 ohm one.

- Make sure the resistor is the correct value. If you have a different model Samsung printer you could try different resistors. I don't think you can do much damage here, you're simply adding small amounts of extra resistance.

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Greetings, printer enthusiasts! In this article, Matthew, our trusted Xerox tech educator, is embarking on a crucial journey through the intricacies of maintaining your VersaLink C400 series printer. In the bustling world of office functionality, where efficiency is paramount, the importance of printer maintenance cannot be overstated. A well-maintained printer is the unsung hero of a smoothly running office, consistently churning out documents and keeping the gears of productivity turning.

Office printers, like any other piece of equipment, require periodic attention and care to ensure they function at their best. In the heart of this maintenance routine lies the often-overlooked task of replacing imaging units. These components play a pivotal role in producing high-quality prints, making them an essential part for the printer's overall performance.

The first step in replacing imaging units is to open the side cover of your printer. Located conveniently on the side of the machine, this cover provides access to the internal components essential for the replacement process.

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