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 | Samsung CLP-300 reset chip by roghani (11/12/07 1:33 PM) reply | + / - | How is possible to reset Samsung CLP-300 toner chip?
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 | Re: Samsung CLP-300 reset chip by South_Raven (1/17/08 5:04 PM) reply | + / - | Yes, they can be reset. You need a serial interface that can be made pretty cheap and also hex editing and programming software. Depends on what type of chips are on the cartridges though. If its OEM then buy one of the easily available kits with chips and most of them can be reprogrammed easier.
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 | Re: Samsung CLP-300 reset chip by JohnK_UK (1/23/08 2:32 PM) reply | + / - | Hi,
I am looking to reprogram the chips for my CLP300. I am quite happy and comfortable with creating a serial interface and with the hex programming.
However I wondered if you could provide some specifics? Such as what pins of the serial interface connect to what points on the chip and the data that much be written.
I am looking at programming after-market chips.
Does a chip programmer already exist on the market which can be purchased?
Your help is much appreciated!
Regards
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| Re: Samsung CLP-300 reset chip by South_Raven (1/23/08 4:16 PM) reply | + / - | I got the software from here http://www.lancos.com/prog.html and made the serial interface from this page http://www.chiprecharge.com/hardeng.html
Hope that helps. I have also completely torn down my clp-300 and am working on a tutorial that will help in cleaning the developer housings up in case you wind up like I did and get a bad batch of toner and have to clean things out and start over.
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| Re: Samsung CLP-300 reset chip by JohnK_UK (1/24/08 10:36 AM) reply | + / - | Hi,
Thank-you for the link above - I think I'll have to get down to Maplin and buy a few bits n bobs!
Just a couple of questions if you have time...
1) Did you make the very simple one (LPT without the diodes) or one of the more complicated COM port ones? I am thinking I will have to use LPT as the COM port never seems to work on my machine! :(
2) What are you using to hold the eeprom in place whilst programming to remain a contact with its pins? ie - What are you using at the end of your "wires" that is small enough to "attach" to the pins of the eeprom?
3) When looking at the chip, how would one know which is the correct orientation of the eeprom?
Thank-you for your help so far - it is certainly very much appreciated!!
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| Re: Samsung CLP-300 reset chip by South_Raven (1/24/08 11:26 AM) reply | + / - | Actually, I used the diagram located on the 3rd picture down the page located here http://www.chiprecharge.com/images/siprogeng.jpg
Its a very simple serial connection. Parts used consisted of a 5VDC adapter, 2 x 5.1V Zener Diodes (1N4733A), 2 x 1/4w 2.2k Ohm 2% resistors, an old db-9 serial cable, a piece of perfboard, and the copper pins from and old telco m-m connector.
I cut the perfboard to fit the circular guard that surrounds the driven gear on the cartridges. Then I took the copper pins and bent them to act as contacts on the back of the cartridge so that all I had to do was lay the perfboard on the back of the cartridge when I wanted to reset or reprogram the chips. The rest of the parts were laid out and soldered onto the perfboard to follow the schematic in the picture. Lastly the ac adapter and serial cable were soldered to the appropriate contacts on the perfboard.
All total took me about an hour to fabricate mine and about 10 minutes to figure out the settings for the chips in the software.
If you look at the business end of one of the cartridges and hold it so that the gear is facing you and the toner dispense tube is at the 12:00 position the contacts will be towards the 3:00 position. The contacts are as follows,
Top Left = Data
Bottom Left = Clock
Top Right = +5 VDC
Bottom Right = Gnd
That's pretty much all there is to it. Once you get to where you can read the chips then you can tell the differences between the colors and also see what has to be edited in order to reset the chips. Note: You will probably not get consistent data by reading the OEM chips and you won't be able to reset them obviously.
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 | Re: Samsung CLP-300 reset chip by JohnK_UK (1/24/08 2:15 PM) reply | + / - | Hi,
Cheers for that - that certainly has been a great help!!
I'll have to get down to Maplin though now and get hold of some perfboard (good idea by the way, lol!), zener diodes and 2.2kOhm resistors! From what you say above, it seems you do not have to actually connect to the PINS of the eeprom, more just the four contacts on the chip!?
I am gonna have to try and find somewhere other than Maplin I think actually as they don't seem to sell a few of the things needed! :(
I'll keep you updated on progress anyway!!
Thanks again - you've been a massive help!
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| Re: Samsung CLP-300 reset chip by roghani (1/25/08 3:27 AM) reply | + / - | Thanks you guys specially South_Raven for very helpful information.
More questions if you have enough time.
1- Should Ground(s) on siprogeng.jpg be connected to each other and to -5V of adapter?
2- Which version of PonyProg did you use?
3- Did you select "I2C Bus 8bit eeprom -> 24XX Auto" from Device menu?
4- Also in the Setup... option did you select "SI Prog API" (under Serial)? And what about "Select Polarity of the Control lines" in the same box?
5- You say its not possible to reset CLP-300 OEM chips with this device and software? i.e. only after market chips are resetable?
Thank you again. More help will be appreciated very much!
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| Re: Samsung CLP-300 reset chip by South_Raven (1/25/08 5:28 AM) reply | + / - | Ground on pin 5 of the DB-9 serial cable, the cathode of the zeners, the bottom right contact for the chip pcb (as viewed in the above instructions), and the ground of the 5VDC adapter, are all tied together as a common ground in this circuit.
The +5VDC from the adapter goes to the contact on the top right of the chip's pcb as viewed above.
The version of PonyProg I am using is 2.07a. I haven't tried his latest release yet. The settings used are I2C bus 8bit eeprom and most all of the aftermarket chips I have seen are 2402. In the serial setup if you have the adapter built and turned on but not connected to a chip it should test ok if you click the probe button. The settings I have are Serial and SI Prog API and no other boxes are checked.
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| Re: Samsung CLP-300 reset chip by JohnK_UK (1/26/08 3:14 AM) reply | + / - | Hey,
Well, I've made an attempt at making one and guess what... it doesn't work! :( - I failed, lol! :)
I can plug it into the com port, press probe, and it says ok (even with no power plugged in) however if I try and read anything it says device not found. One thing is though, I was finding it difficult to locate a 5v DC adapter so am using 4.5 instead - would this matter? I can't imagine 5v adapters having an error margin much less that 0.5V can they?
Any suggestions???
cheers for the help so far!!
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| Re: Samsung CLP-300 reset chip by South_Raven (1/26/08 6:03 AM) reply | + / - | More than likely you either have the pin out on the serial cable switched male vs. female views or all the ground points in the circuit aren't tied together like they need to be. Do you have your contacts for the chip's pcb in the right order?
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| Re: Samsung CLP-300 reset chip by Anonymous (1/28/08 9:23 PM) reply | + / - | Great - i've been searching für a solution for a long time ;)
für 5V and GND you also can taka a USB Cable ;)
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| Re: Samsung CLP-300 reset chip by South_Raven (1/29/08 5:46 AM) reply | + / - | You probably could but I haven't tried USB with PonyProg yet to see if it works that way.
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| Re: Samsung CLP-300 reset chip by JohnK_UK (1/30/08 3:46 PM) reply | + / - | Hey,
I have had a little play around tonight and... have got it working!!! At the same time I changed the power supply from the DC adaptor to a USB lead (using just the red and black) so I don't have to use a wall socket.
I have read the old yellow chip, read and new yellow chip (already bought it) and then wrote the new to the old. One thing I found is that the contacts have to be pretty solid else you end up with a "hardware/bus error". I am going to purchase some small bulldog clips tomorrow hopefully and clip the wires to the chip from now on so as to get a good connection. It means taking the chip off the cart each time of course but seeing as it's only once now and again that you need to reset the chip, I can live with it!
I haven't got the other colour chips to read the brand new setup from however from the looks of things if you just set all the top bits to 1 (well, the words to FF) and similarly with some around the middle then you are along the right tracks?
I'll post a bit of an update soon but it's late now and I'm up for work early, lol!
I'd just like to say thank-you very much for the help you all have given - it is very much appreciated!!! :D
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| Re: Samsung CLP-300 reset chip by South_Raven (1/30/08 5:14 PM) reply | + / - | Congratualtions JohnK_UK. I might get around to trying the latest version of PonyProg and also converting to USB as well.
I'm also working on an instruction guide for a teardown, cleanup and repair of these printers. I went through a bout with a bad batch of toner that really screwed mine up and had to literally tear it apart, clean it out and rebuild it. Despite the machines compact design it's not that bad to rebuild or repair. Of course I have pretty heavy use of mine but it needed to be cleaned up anyway. In the 2 months that I have had this printer I have went through 6 full sets of toners and average about 12% coverage. Needless to say it was pretty dirty inside even without the bad toners.
As a helpfull suggestion, read all of your hex files that you get from all four colors. You'll see the 4 places that it uses to identify each color. Don't pay as much attention to the ASCII though as it can be misleading. Apparently it does distinguish between HEX 00 & FF and are not read the same. To get the machine to think it is a new cartridge change the date and also the crum number and clear anything to HEX 00 on all the lines but the 8 that are obvious.
Once I get screenshots of sample code and the rebuild tutorial I will post them somewhere that they can be of use.
And also, if anyone feels the need, donations are accepted!
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| Re: Samsung CLP-300 reset chip by ben10 (1/31/08 12:10 AM) reply | + / - | Thank you South Raven/John K for your informative posts. I am interested in doing this as well.
I can't access your gif's above; it says forbidden. Could you post them somewhere else please?
Ben
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| Re: Samsung CLP-300 reset chip by johnk_uk (1/31/08 5:10 AM) reply | + / - | Hi,
I am also getting the forbidden notice.
I'm hoping to make another device after the weekend but a lot neater and mounted in a plastic casing with longer wires etc, ie, something that can be connected to the computer and left there without the risk of getting snagged and broken!
Unfortunately I cannot read fresh files for cyan and magenta as I don't have new chips for these however I will quite happily post the files for black and yellow if anyone is interested? That way, rather than editing the chip data before uploading, you can just upload the corresponding file.
South Raven - if you need any help on any further developments then feel free to contact me - I'm not an hardware expert by any means (I did a microcontrollers module in my Computer Science degree but that's about it) but I might be able to help with some aspects and perhaps some programming if required
Cheers!!
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| Re: Samsung CLP-300 reset chip by ben10 (1/31/08 10:04 AM) reply | + / - | Hi,
I have a full set of new chips (non-samsung) just purchased and will post them up as soon as i can read them. They are european chips (will not work in US and vica versa)
I just bought a set of these; item # 220196122192 on Ebay; should be ideal for clipping to the chips and color coded
May try and build the parallel interface as have the cable already
Ben
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| Re: Samsung CLP-300 reset chip by Klauss (1/31/08 11:46 AM) reply | + / - | Hi,
Clicking on the provided links, in fact, I also got a "forbidden" message but copying/pasting the links to the internet navigator (Firefox) it worked.
But I need more details: when you say "change the date and also the crum number and clear anything to HEX 00 on all the lines but the 8 that are obvious"...
What is CRUM? Apparently the four digits after CRUM- are 2 for the year and 2 for the month. Is it right? And the rest? What should be written there?
Thanks. Klauss.
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| Re: Samsung CLP-300 reset chip by JohnK_UK (1/31/08 1:04 PM) reply | + / - | Cheers for those - are the top sections necessary though (000000-000030)? I read some new ones I have and there is no section at the top, just 000080-0000B0.
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| Re: Samsung CLP-300 reset chip by South_Raven (1/31/08 1:44 PM) reply | + / - | Keep in mind that this is from a set of US cartridges. Bits 01h, 11h, 1Bh apparently all represent the cartridge color and this is why the cartridges aren't interchangable. The same sequence is duplicated again beginning with 80h. These also show the format and place for the date in the form of th year and the month and the crum number as well. To get them to behave as a new cartridge clear all the other data by editing the hex and filling with 00h and change the date and the crum number. If you don't change the date and the year then if you reinsert the cartridge the printer will rewrite the old usage data back into the chip and you won't see any changes in the smartpanel. I use mine until the printer detects the toner level getting lower than normal in the developer housing and triggers a toner delivery problem and then eventually it will give you a message in the smartpanel that the toner cartridge is invalid.
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| Re: Samsung CLP-300 reset chip by Berny_AB (2/1/08 5:45 AM) reply | + / - | nice to hear your great results
btw. the post about USB came from me but maybe it might also be possible do take 5V direct from LPT Port
I've seen it on other Programmer scematics
Conected pin 4,5,6,7,8 together with 220 Ohm Resistors on each pin and a 47uF cap between GND and PWR line to get constant voltage separation
Does anybode tested this very easy programmer shematic?
http://www.chiprecharge.com/images/lptprogeng.jpg
I've not tested it myself yet
I think CRUM Nr. is something like a serial number and the first 4 digits stand für Year an Month of Production
The rest of digits you could change as you would i think...
But don't forget to edit upper and lower Codes as the same values!!!
at the Yellow hex over there
http://codepyle.110mb.com/Samsung/clp300/index.html
might be a failure on the first 4 CRUM digits - they don't match to Date Code...
If possible post some other read Hex codes to verify
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| Re: Samsung CLP-300 reset chip by JohnK_UK (2/1/08 9:06 AM) reply | + / - | Crum number appears to be anything - I just put in a random first two digits and it works fine.
I've also made a little box for the resetter this afternoon and mounted everything along with a little guide glued to the top. I've even stuck an old LED I had lying around onto the +5V to give a nice power light. :) - I'm quite proud, haha!!
http://img297.imageshack.us/my.php?image=01022008226sb8.jpg
It's a lot more messy inside, trust me!
Just to confirm, I'm using the DB9 schematic with USB providing solely the +5V.
As for the hex codes, the UK versions do not need the duplication - they only need the second series (or at least it appears with my chips - all reset and tested working fine like this). Just be sure to change the date/crum number as I found this affected it. I believe you can use any values.
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| Re: Samsung CLP-300 reset chip by ben10 (2/1/08 11:37 AM) reply | + / - | Hi,
Got mine to work using LPT and two-transistor interface (dunno why I went this way; I guess because I already had the parallel lead and DB25.) I'm no electronics guru but there seemed to be a lot of literature precedent on the internet for the use of that lancos two-transistor interface
http://www.lancos.com/e2p/easyI2Cbus.gif
and none for the Russian 'two resistor' interface (if it weren't necessary to isolate the port in this way then why would they bother to?)
USB port is providing 5v supply.
I bought a set of compatible chips; here's a screen dump of the black one. I may post screen dumps of the others if anyone wants them.
http://img352.imageshack.us/img352/5742/blackcompatibleol8.jpg
Any comments anyone?
Ben
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| Re: Samsung CLP-300 reset chip by ben10 (2/1/08 11:45 AM) reply | + / - |
Could someone please explain from the above screen dump which bits are indicating the cartridge is full and what it would look like when the cart. was empty?
Ben
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| Re: Samsung CLP-300 reset chip by ben10 (2/1/08 11:47 AM) reply | + / - |
PS I should point out this chip is brand new and has never been inserted into the printer
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| Re: Samsung CLP-300 reset chip by JohnK_UK (2/1/08 1:30 PM) reply | + / - | Why bother seeing exactly how empty it is? Just reset it to full when the printer thinks it is empty.
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| Re: Samsung CLP-300 reset chip by South_Raven (2/1/08 2:23 PM) reply | + / - | I haven't tried to decipher the hex to determine the usage pattern that is written to the cartridge. I have been mainly interested in just resetting it and keeping toner in it. With the volume we have I usually reset it about twice a week and refill it once a week. We are averaging 12% coverage with what we print.
I'm wondering what would happen if you were to just clear all the data from the (chip fill it with 00h) and insert it into the printer what would happen. After all, when you first get the printer new in the box the starter cartridges do not have chips on them.
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| Re: Samsung CLP-300 reset chip by Berny_AB (2/2/08 8:47 AM) reply | + / - | Right first cartridges doesn't have a chip on it
That's also for me a bit anoying
Why does the printer recognice the cartridge???
You can't put in the cartridge wrong so the colour code is nearly useless
i've read on an other forum some time ago that the printer locks if it can't recognice new incomint toner
maybe it setup first after first toner cartridges are empty
the counter seems to be in printer and not in Cartridge chip
so it only recognice a new toner cartridge and reset the status in itselfes
cartridge chips arn't intelligent enough but the printer i think
i'd be interested what happens if you exchange an olt cartridge to an new one and after that put old cartridge back in it
if the printer doesn't recognice the CRUM Nr. or any value inside the chip it may also work with old cartridge after exchange too
maybe it would be also possible to reset the cartridge status direct in Printer over a software like it works with some old Epson Ink Printers
If Printer is really inteligent and can lock a cartridge could be also possible to unlick :D
Please post all done hex dumps and a picture of the used third party chip
if possible a dump of a brand new original and the same used (empty) original cartridge
I don't think that anything will change
if possible do the same with third Party chip
there are some different chips on market - so this could be very interesting to find out what's differences and what exactly happens
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| Re: Samsung CLP-300 reset chip by JohnK_UK (2/2/08 9:37 AM) reply | + / - | I don't believe you can re-use the same brand new dump over and over without first changing the crum number. I think the crum is similar to a MAC address for normal hardware - ie, "unique" to the chip. As said above, I think the counter is in the printer and not the cart as you can wipe a cart and the printer still thinks it only has a low amount in it until you change the crum number.
Had anyone tried changing only the crum and leaving everything else in tact?
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| Re: Samsung CLP-300 reset chip by South_Raven (2/2/08 9:57 AM) reply | + / - | Actually I have. If you keep the same crum number then the printer just thinks it has removed and reinserted. I have been resetting the crum and date though and not just the crum by itself. I have been using 2 hex files with each color and just programming back & forth between them. The printer only keeps track of the current cartridge and has no memory of the previous one. I think the counter and other usage data is in the printer as well. The only real data I see getting written into the cartridge is when you first install it and then again when it disables it.
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| Re: Samsung CLP-300 reset chip by Berny_AB (2/3/08 2:25 AM) reply | + / - | If i understand it right it may be enough to take two chips for every colour an only exchange the chip after the cratridge is empty
is this right?
So the best solution for me would be if i buy 1 new cartridge set and setup a chip on the cartridges which comes with the printer and even exchange/refill empty and exchange
for example:
Cartridge 1: cartridge which comes with the printer + third party Chip
Cartridge 2: new original cartridge
Cartridge 1 empty - Cartridge 2 (new)
Cartridge 2 empty - cartridge 1 (refilled)
Cartridge 1 empty - Cartridge 2 (refilled)
Cartridge 2 empty - Cartridge 1 (refilled)
....
So i don't have to edit Crum or anything inside chip
Is this right or do i get wrong???
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| Re: Samsung CLP-300 reset chip by JohnK_UK (2/3/08 1:16 PM) reply | + / - | Once the cart is empty it will write this to the chip. I'm not sure how you would go on swapping between two though and doing it before it's empty... could be an option...?
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| Re: Samsung CLP-300 reset chip by Anonymous (2/3/08 2:55 PM) reply | + / - | swap before it's empty is for sure a option ;)
I've thought that Status is saved in printer and not in Cartridge - so the printer remember the CRUM or anything like that and don't write something to the chip on the Cartridge
That's why it would be good to have a hex from one and the same cartridge when it is brand new and when it's empty ;)
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| Re: Samsung CLP-300 reset chip by ben10 (2/4/08 1:32 PM) reply | + / - |
Sorry you can't click on those links. You'll have to copy and paste them into a new window.
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| Re: Samsung CLP-300 reset chip by teenie58 (2/7/08 10:52 AM) reply | + / - | I'm new to this forum, and have recently purchased a Samsung CLP-300. It is a factory refurbished and I got it from 3BTech in South Bend Indiana for $129.
This thread fascinates me as I have been looking for a way to reset the toner chips as I have done in the past with my older Epson C86.
When I received this CLP-300 I don't think it was really refurbished as the smart panel tells me that the toner levels are just about empty, but for the price I can't complain. I did carefully drill the hole and refill the black one, but the smart panel still says it's just about empty.
So I want to try this circuit and Pony Program to reset the black cartridge. Then if I can get this to work, I'll do the other colors.
My question is about the 2402 chip. Where can this be purchased? I'm sure Allied Electronics sells them, but I don't think you can place an order for a small number of pieces valued at a couple of dollars. I live in Southern California, Big Bear City. If you have any suggestions I would be very appreciative.
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| Re: Samsung CLP-300 reset chip by South_Raven (2/7/08 12:08 PM) reply | + / - | The best thing to do would be to buy one of the aftrmarket refill kits off ebay or from a shop somewhere that comes with the 4 refills and also the chips. That way you get them already mounted on a pcb that just sets over the top of the old chip on the back of the cartridge.
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| Re: Re: Samsung CLP-300 reset chip by teenie58 (2/7/08 12:13 PM) reply | + / - | Thanks for the info and for such a quick response.
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| Re: Samsung CLP-300 reset chip by JohnK_UK (2/9/08 6:05 AM) reply | + / - | Ben_10 - I have a suspicion that it may only be required to change the crum number and the date before a chip is killed as it appears that the counter is stored on the printer and not the cart itself...
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| Re: Samsung CLP-300 reset chip by Anonymous (2/11/08 12:50 AM) reply | + / - | Hi John,
So you would change the date eg 200610 to 200611 and the crum date digits eg 0610 to 0611 and also another digit in the crum to be on the safe side? I wonder if only certain crum's are permissible as an extra hurdle?
Ben
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| Re: Samsung CLP-300 reset chip by JohnK_UK (2/13/08 10:45 AM) reply | + / - | I believe any numerical value can be used as the crum number
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| Re: Samsung CLP-300 reset chip by South_Raven (2/13/08 3:36 PM) reply | + / - | crum and date are not related other than the fact you need to change them both to make it think its a new cartridge. Also the date is not checksummed into the crum either.
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| Re: Samsung CLP-300 reset chip by JohnK_UK (3/13/08 4:07 PM) reply | + / - | Hey mate, did you ever get round to doing the cleaning guide? I think my printer needs it - it's refusing to work. :S - makes a few of the normal noises when you start a print job then stops and the red light comes on! :(
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| Re: Samsung CLP-300 reset chip by South_Raven (3/13/08 4:58 PM) reply | + / - | Well, I took all the pictures but got distracted and never transferred them from the camera to the computer.
Check your waste sump. Mine does the same thing when its full. Also turned out that I had one of the augers clogged up. There are 2 of them that move them waste toner from the drum cleaning area uphill to the sump and the other one comes from the transfer belt cleaner over to the sump.
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| Re: Samsung CLP-300 reset chip by JohnK_UK (3/14/08 9:44 AM) reply | + / - | Hi,
I've emptied the waste toner and tried cleaning the augers with the hoover but to no avail.. :(
Any more suggestions? It sounds like something is getting stuck when it's trying to start up..
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| Re: Samsung CLP-300 reset chip by JohnK_UK (3/14/08 9:59 AM) reply | + / - | I have a feeling it may be the paper feed mechanism...
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| Re: Samsung CLP-300 reset chip by South_Raven (3/14/08 2:53 PM) reply | + / - | Are you sure the imaging assembly is latched into the printer good? What kind of error are you getting? Their should be something in the Smart Panel as far as an error or status. Also, all of the drive mechanisms are on the right side of the printer. If your hearing noises or something abnormal try to isolate where the noise is coming from. Perhaps their is something in the paper tray causing the paper stack to be too high. Not enough clearance for the paper feed roller will cause it to bind and make a grinding noise when the clutch slips.
The more you can tell me about its misbehavior the better I can probably help you diagnose your problem and perhaps get you going again.
In the meantime I'll see what I can do as far as getting the images from the camera and editing them for a guide on this printer.
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| Re: Samsung CLP-300 reset chip by JohnK_UK (3/30/08 3:21 AM) reply | + / - | Bloody hell - fix one problem and another arises! :(
Now the printer is leaving faint streaks down the length of the page. This is on all colours. I have tried shaking the imaging unit etc to distribute the toner properly but no luck. Is there anything else which might cause this?
Cheers
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| Re: Samsung CLP-300 reset chip by South_Raven (3/30/08 5:41 AM) reply | + / - | Light streaks or dark streaks? I've had light streaks happen a couple times and had to open it up and clean off the metering blades on the developer rolls. These clean pretty easy since they are made of steel and not flimsy mylar like many. Make yourself a CMY test pattern and make a colored rectangle about an inch high and 8" wide and make one for each color and print that page. That will tell you which developer housing is doing the streaking.
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| Re: Samsung CLP-300 reset chip by JohnK_UK (3/30/08 7:25 AM) reply | + / - | Hi,
The streaks are light streaks and always appear to occur in the same place on the page.
I've done the test and black and cyan are pretty poor! Cyan fades a lot over on the right-hand side with a bit on the left, magenta has a very faint line on the left and black is poor right the way through! :(
How would I go about cleaning? Do I need to dismantle everything?
Sorry about the dumb questions, lol!
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| Re: Samsung CLP-300 reset chip by South_Raven (3/30/08 4:55 PM) reply | + / - | Sorry about the delay. I know I had said I was going to put together a cleaning guide but I have been laid up with the flu for the last week.
Sounds to me like you need to tear into it and clean the metering blades. If you do one you might as well do them all while you have it open. If you do it carefully then you will have almost no loss in toner. Basically the procedure is pretty straightforward. For tools you will need a #2 Phillips screwdriver, a small soft bristle brush (make sure it don't shed) and a vacuum cleaner that will catch toner dust and not just let it blow right through.
Remove the imaging unit from the printer and remove the toner cartridges and the waste sump. Locate the 2 phillips screws that hold the drum assembly onto the imaging unit. If the drum is facing you the first screw is just above the drum itself. You'll see the plastic support arm. Be carefull and don't nick the drum surface with the screwdriver handle here. The other screw is located on the right side and also holds one of the channels that augers waste toner up to the sump. Carefully pull back on the left bracket while at the same time push to the right on the right arm. The drum retainer assembly will literally pop free once you have cleared the plastic boss' that hold it so be ready and don't jump or you'll probably ding the drum. Rotate the drum assembly back towards you and you will notice wires running in a groove on the bottom left. Just swing the assembly around to give yourself room and at the same time prevent the wires from getting damaged. Once you are at this point then its easy to just slide out the 4 developer assemblies for cleaning.
Each developer assembly is secured using 5 screws. 2 of them also have spring steel "Z" shaped pieces. Remove these 2 first and set the Z shaped pieces aside. Then remove the 3 remaining screws and gently lift the cover off the housing. The cover also serves as the metering blade for the developer roll. Carefull with the front edge, it has a really tiny curved lip to it and will give you a really nasty cut. I found that one out the hard way the first time I opened mine up! Vacuum off the top inside of the cover. If you look at the edge of the blade you should be able to see toner stuck to it where your streaks were at. Take something soft like a popsicle stick and run over the edge to scrape off the stuck toner. Don't use a lot of pressure here or you will bend the cover and blade and then it becomes junk. When your done the edge should be free of any burrs or stuck toner. Make sure you look close as it don't take much here to cause an image defect.
Once you have cleaned all 4 of them re-assembly is pretty straightforward except for one detail to watch for. Place your cover on the developer housing and start the 3 screws but DO NOT TIGHTEN THEM! Look carefully at the developer roll on each end and you will see a foam seal. These seals must not get trapped under the cover/blade. Carefully take a small tool and pull the seal out from under the cover/blade. Use gentle pressure to hold the cover down and maneuver the seal out. Once the seals are clear then tighten the 3 cover screws. Put the Z shaped pieces back in place and tighten them as well. Your dealing with a plastic housing here so watch and reuse the same thread and don't over tighten.
That's pretty much it. Just reassemble in reverse and put everything back together and hopefully this will cure your streaks.
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| Re: Samsung CLP-300 reset chip by JohnK_UK (3/31/08 11:10 AM) reply | + / - | Hi,
I tried cleaning it and am now in a somewhat worse position than when I started, lol! DOH!!!
Now, the lines have disappeared from the cyan, magenta and yellow but the black is still faint. Additionally, I have now managed to get a dark, myrky line running from the very top of the page to the very bottom, right over on the far left of the page. This is a mix of yellow and black. I have checked both imaging units and they seem fine although one thing I noticed about the black is it didn't contain quite as much toner as the rest when opened.
After printing my test sheet, if I look on the drum, I can see toner deposits on the left which have caused this. I have cleaned the drum but it still happens.
Cheers for the help so far! :)
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| Re: Samsung CLP-300 reset chip by rafqua (4/11/08 4:03 AM) reply | + / - | Hi everyone,
I tried to reset the chip of cyan and magenta cartridge for my clp 300.
I wrote in the chip but only from sector 00080h.
Then i put the cartridges in the printer but the chip aren't resetted.
I used the circuit with serial port with 2.2kohm resistor and 4 diodes 1n4148.
If I read the chip i have the reading.
Please could someone help me?
Thank you
Raf
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| Re: Samsung CLP-300 reset chip by Ken39 (4/11/08 10:49 AM) reply | + / - | made the reseter as described (using com port 2 resistors & 2 diodes)
I can read the chips but cannot write anything to them??
they are supposed to be smart chips (purchased with refill kit)
any ideas
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| Re: Samsung CLP-300 reset chip by JohnK_UK (4/14/08 3:10 PM) reply | + / - | In the end I just phoned samsung and got them to send out an engineer who replaced the imaging unit and transfer belt under warranty, haha! :)
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| Re: Samsung CLP-300 reset chip by South_Raven (4/27/08 5:25 PM) reply | + / - | JohnK_UK;
I have come to the conclusion that the transfer auger and chute assembly on these printers is a regular problem. Twice now I have had to remove that particular assembly from the printer and manually vacuum it out. For whatever reason the toner keeps backing up in the housing until it has nowhere to go and then it will start dumping out the left side of the transfer assembly and also through the cleaning blade and I get toner spots all over my printed paper on both the front and back. I have seen it severe enough that it leaves a brownish toner trail stuck to the transfer belt that of course also winds up on the printed paper. The transfer cleaning mechanism is all functioning properly and nothing broken and the drive and driven gears are all working fine as well as the chute that the toner should be getting pushed up through to the waster toner hopper. This is probably what happened to your machine John. Granted I probably have a much higher use than most here on the forum as far as this printer goes. I have had mine since the first of the year and right now have just over 30,000 prints on the machine and so far have had to clean out this transfer housing twice now.
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| Re: Samsung CLP-300 reset chip by higginch (5/28/08 12:48 PM) reply | + / - | I recently upgraded the firmware on my CLX-3160FN (uses the same toner as the CLP-300)... according to Samsung this upgrade was supposed to "conserve toner" and offer other stablility improvements... in fact the new firmware had the printer complaining about my "refilled toner" (constant errors, flashing red light)...
Annoying, but I could live with it.
What I couldn't live with, and what's hard to believe, the print quality was degraded all of a sudden (uneven, blotchy)... the problem was obviously a direct effort by Samsung via the "firmware bomb" to prevent use of refilled toner (printer status reports were still perfect). Way to screw the customer Samsung...
Just wanted you to know that with the info here, a bit of soldering, and PonyProg I was able to reprogram all the toner EEPROMs and the printer stopped complaining and returned to full print quality!
Thank you, thank you, thank you!!!
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 | Re: Samsung CLP-300 reset chip by deluxe (6/2/08 6:12 AM) reply | + / - | I have a CLP-300 and upgraded the firmware to the new version on their website v1.00.12.35. DON'T DO IT!!! My printer has factory-original toner and this firmware upgrade made my printer a piece of crap.
With the new firmware, the text output is much thicker and fuzzier, the nice grayscale contrast is gone and replaced with much darker tones, and there are ERRORS in the graphics that show up as squiggly white lines. I'm appalled that Samsung released this firmware into the wild as it's effectively crippled my printer's output and makes even simple sheet of text look unpresntable.
I've written Samsung twice asking for some resolution, but haven't received a reply. This is horrible. I'm ready to throw my printer out the window and buy a Brother.
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| Re: Samsung CLP-300 reset chip by saltyok (6/3/08 3:58 PM) reply | + / - | Thanks SO much!!!!! I had light streaks in the black color and followed South Raven's advice on how to clean the metering blades and it works perfect now! Again! Thanks!
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| Re: Samsung CLP-300 reset chip by South_Raven (6/3/08 6:52 PM) reply | + / - | Most laser printer issues normally come from needing a good cleaning. Toner is pretty nasty stuff and virtually impossible to keep confined 100% of the time.
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| Re: Re: Samsung CLP-300 reset chip by Shaher (6/9/08 6:55 PM) reply | + / - | Hello, I have built the chip reseter, but I have one question, when I connect the serial port to the computer does it have to be recognized by windows ??? I've checked the connection pins many times but nothing, and how am i supposed to know which com port to select in the program setup menu?
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| Re: Re: Samsung CLP-300 reset chip by Shaher (6/11/08 1:57 AM) reply | + / - | any way i got the computer to recognize the device finally... but guess what?? it doesn't work, each time I try to read the chip with the configuration I2C 8 bit eeprom & 2402, and each time i click on read it says : device not responding or bus busy !! and if I don't connect the chip to my circuit it gives me another error message, which means that the program is woking fine. If i click on another configuration and try to read, all the bits I have are either 00 or FF, and i get the same result even if i don't connect the chip to my circuit,
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| Re: Samsung CLP-300 reset chip by Som30ne (6/11/08 9:47 AM) reply | + / - | I posted a message some days ago,
and for some reason, it was deleted.
I believe I did not write anything that was inappropriate, and still.
I'd like to know the reason the message was deleted.
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| Re: Samsung CLP-300 reset chip by Shaher (6/14/08 3:07 PM) reply | + / - | The chip reseter worked perfectly fine.. but there is one big problem.. if the printer detect the cartridge as empty, I can't write on the chip !! exactly the lines before 0x0080 ... is there a solution for this problem ???
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 | Re: Samsung CLP-300 reset chip by stiggle (6/15/08 12:00 PM) reply | + / - | I have the Xerox Phaser 6110 which appear to be exactly like the Samsung CLP300.
The samsung tone chips are rejected.
Does anyone have toner chip programming data for the Phaser 6110?
Also, trying 6110 imaging unit in CLP300 seems OK but RED status light. CLP300 shows ready on computer but print files just disappear and not print activity.
Does the imaging unit have a chip in it like the toner?
If so, does anyone have a readout of this.
Thanks Stanley
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| Re: Samsung CLP-300 reset chip by Maani (6/19/08 12:58 PM) reply | + / - | The chip reseter worked perfectly fine.. but there is one big problem.. if the printer detect the cartridge as empty, I can't write on the chip !! exactly the lines before 0x0080 ... is there a solution for this problem ???
Please help !!!
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| Re: Samsung CLP-300 reset chip by South_Raven (6/19/08 1:18 PM) reply | + / - | Are you trying to rewrite OEM chips or aftermarket?
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| Re: Samsung CLP-300 reset chip by Shaher (6/19/08 3:06 PM) reply | + / - | no I am trying to rewrite an aftermarket one, and is there any possible way to erase the chip entirely ??
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| Re: Samsung CLP-300 reset chip by south_raven (6/19/08 3:58 PM) reply | + / - | If its aftermarket you should be able to write anything to the chip at any address....if your using ponyprog you can do CTRL-C to clear the buffer and write that to the chip if you want...its the info though before 80h that identified the cartridge to the printer..
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| Re: Samsung CLP-300 reset chip by claudeusw (6/24/08 11:29 PM) reply | + / - | Hi ! I am fascinated by the subject of this forum because I was asking me the same questions. Thanks for the answers and for your care to share your knowledge. Also allow me to add my modest contribution, in hoping that it might help in a better understanding ! Many of you are wondering where are located the counters's information about the cartridges. In the cartridges's chips or in the printer ?
Here is my little story. As I appreciate excessively this printer (Samsung CLP-300) I decided to upgrade to model CLX-2160 which, as you know, uses the same imaging unit. For a few more dollars I obtained a high resolution scanner, a new spare imaging unit, and a kit of starting cartridges (without chips) and as a bonus a supplementary paper tray. What a deal !
I chose to set aside the new imaging unit and to store it in the "old" printer (CLP-300)in full darkness. But before doing the swap between the used imaging unit originally in my CLP-300 and the new imaging unit obtained with the CLX-2160, I asked a printer report on the CLP-300. I have got the information about consummables life and toner information. As soon as I completed the exchange and installed the "old" imaging unit, complete with the 3/4 full original starting cartridges without chips, in my brand new CLX-2160 printer, I put power on. Naturally I got the Congratulations message indicating that the cartridges had been installed successfully. But guess what ? When I asked for a printer report, I have got completely different figures. All but the imaging unit and development roller life were reset. Imaging unit and development roller life were roughly the same. The toner remains percent values and the toner average coverage values were also reset. Astonishing, Isn't it ? Not really. It gives simply, in a sense, answers to what some of you were looking for ! So it seems that nothing is stored in the cartridge's chips. Only the imaging unit keeps track of its use. The major part of information is managed by the printer itself ! A small information but may be a clue to progress. Thanks for reading.
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| Re: Re: Samsung CLP-300 reset chip by potblak (6/26/08 3:29 AM) reply | + / - | Hello,
I've had a CLX-2160 for about a year now.
After about 6 months or so of heavy use in my home office, the imaging unit failed. (The gears feeding black toner stripped)
The imaging unit was replaced under warranty.
Now the same has happened again, and like claudusw I decided to buy a CLP300 just to get a new imaging unit. I have no intention of using the CLP300. (New CLP300 = $169; Replacement Imaging unit ~$300)
But I would like to make use of the un-chipped cartridges which came with it.
My CLX-2160, having used its original load of un-chipped cartridges, refuses to 'see' these.
Any ideas, anyone??
Also, does anyone want a new CLP300 without imaging unit???
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| Re: Samsung CLP-300 reset chip by roghani (6/27/08 1:21 AM) reply | + / - | potblak,
Buy and install a set of new chips on your un-chipped cartridges and they will work on 2160.
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| Re: Re: Samsung CLP-300 reset chip by Anonymous (6/27/08 3:19 AM) reply | + / - | Sorry for my ignorance, but;
Where from?
How much?, and
How?
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| Re: Samsung CLP-300 reset chip by roghani (6/27/08 4:06 AM) reply | + / - | There are many companies that produce aftermarket chips. For example Future Graphics (www.futuregraphicsllc.com) and Oasis (www.oasis-imaging.com). Price for each chip ~$5.
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| Re: Re: Samsung CLP-300 reset chip by potblak (6/27/08 4:39 AM) reply | + / - | Fine,
Thanks, but how can you fit a chip to an un-chipped cartridge???
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| Re: Samsung CLP-300 reset chip by roghani (edited 6/27/08 5:41 AM) reply | + / - | There is a cubic hole near the gear of the cartridge which is chip place.
If you have purchased new cartridges for 2160, you can see chip on them.
Also check this out:
http://www.uninetimaging.com/technical_reman_samsung.asp
and download clp-300 pdf file.
By the way, if you are in US, buy US region chip because there are several versions for these chips.
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| Re: Samsung CLP-300 reset chip by potblak (6/27/08 11:14 PM) reply | + / - | Thanks very much for being so patient with me!
Until I read the Uninet instructions you pointed me to, I didn't realise you could stick the new chips over the old ones!
I'm in Australia. Do you know which region I should go for?
The installation CD-rom was in English/French, so I suppose it might be Europe, but those languages also work in the South Pacific.
I migh have to experiment a little.
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| Re: Samsung CLP-300 reset chip by roghani (6/28/08 8:44 AM) reply | + / - | Print "printer settings" and check "Set Model". It shows printer and chip version (this is in CLP-300, you can find similar in 2160).
By the way, Future Graphics has a branch in Australia. You can ask them.
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| CLP-300 reset chip by kara  (edited 7/15/08 10:25 AM) reply | + / - | Hi South Raven,
Thanks Thanks a lot.By reading your excellent guide lines, posted by you, in this thread, to day I have manged to build one Serial interface succesfully. I read new three clp 300 chips and saved three .e2p files.
but the files are not like yrs but like exactly like what mr
ben10 posted ie having full of yyyyyyyy.. and from 00080 to oooBo
CY300EXYY...ETC DATA--ONLY ONE SET DATA NOT DUPLICATED --- OK
At present i am not having emptied chip which i can reset
Some doubts-will u pl answer
1.If I take out the half emptied cartridge and reset the chip,then it ought to show as full and eventually if the rest half emptied,what would be the display in the smart panel?
2. How to write the new chip file in the emptied chip ie have i to delete all the data in the emptied chip or simply to give write command to overwrite in the emptied chip
3. Or simply edit the emptied chip ie to change date and crum
values,as u suggested
Once again thank u much for yr excellent guiding words which only encouraged me and made me try this successful and very useful attempt
with cheers,
kara/India
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| Re: Samsung CLP-300 reset chip by steve1UK (7/17/08 7:29 AM) reply | + / - | Hi all..one thing you have to take care of in chipping original non-chipped toner cartridges is that some new chips when stuck into the recess on the cartridge will be sitting too low to make proper contact with the pins. I had this problem and was tearing my hair out..with the printer saying the toner was still empty. I added some padding in the recess (sticky foam works well) so that the new chip sits higher up. Then it worked fine. I think some of the chips that come in refill kist assume you are re-chipping an existing chipped cartridge...and that they will be stuck ontop of the old chips.
cheers
steve
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| Re: Samsung CLP-300 reset chip by Vanko Micin (7/17/08 2:02 PM) reply | + / - | Hi,
thanks to all contributing to this thread. I think I'm going to buy the printer! But...
It's been pretty long (almost 20 years) since I did some electronics back in school. So, if anyone could be so kind and post a picture of a printed board with the elements laid out? That would be extremely cool, since I still got a chunk of copper board and some HCl laying somewhere in my garage! Thanks in advance!
Vanko Micin
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| Re: Samsung CLP-300 reset chip by South_Raven (7/19/08 9:52 AM) reply | + / - | I think one of the problems some people are having as far as what they are looking at and trying to edit as far as the chip dumps may be that apparently some of us are saving the files in various formats. I have saved and also posted mine as traditional (old school) IBM Binary files which is a raw hex type of format. In PonyProg itself they were saved as .bin files. I haven't tried using any other formats and experimented with possible differences among the formats that PonyProg is capable of but this may explain why some people can't see or edit before 80h.
The suggestion that steve1uk has about using the foam in the recess on starter (un-chipped) cartridges is a very good idea as most of the aftermarket chips are on very thin pcb material and I'm sure will bow into the cartridge when its inserted into the printer.
As far as what will happen if you reset an aftermarket chip and the toner cartridge isn't full, you will see the printer trying to keep cycling for a few times and then it will eventually disable the cartridge and the message in the printer monitor will read "invalid toner cartridge". Refill the cartridge and reset the chip and your back in business.
For those of you that have emailed and asked about me building a serial interface for you, sorry but no, its pretty simple to do and the parts are easy to find to build one that will work for you. I'm not in the business of making a profit on this and there are already aftermarket interfaces out there but to me unless your a refill or repair shop they aren't worth the cost. Especially when you can build one for about $5-$10 and 30 minutes time.
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| Re: Re: Samsung CLP-300 reset chip by cmdrdata (7/20/08 7:36 AM) reply | + / - | Hi, I just bought a refurbished CLP-300N and am quite happy with it except that the printer have some color or B/W dots where it should be white. Perhaps the drum is dirty? The printer was shipped with the toners already in place, thus jostling during shipping may contaminate the print engine? What should I do? your tear down instructional guide would be of interest to me. Thanks.
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| Re: Re: Samsung CLP-300 reset chip by kara (7/21/08 10:31 PM) reply | + / - | Hi South Raven
Thank u for ur response.
When it is saved in .bin format,of course it is saved, but it is not opening. In Pony Prog it is being suggested to save in .e2p format,that is why I have saved the three ( C,M,Y ) files in .2ep format
kara
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| Re: Samsung CLP-300 reset chip by rafqua (7/28/08 5:17 AM) reply | + / - | Hi,
I programmed the chip of my black toner cartridge when the led is not blinking.
i wrote the chip with the hex codex as you suggested in the messages;
after I put the toner in the printer and I saw the black led is turned on and the printer goes in failure.
I rewrote the chip successfully, but the situation is the same.
Could someone help me?
Thank you in advance
Raf
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| Samsung CLP-300 for Sale (No Imaging Unit) by Anonymous (7/29/08 4:29 PM) reply | + / - | How much do you want for it?
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| Re: Re: Samsung CLP-300 reset chip by kara (7/30/08 9:20 PM) reply | + / - | Hi Mr maani,
i am also encountering the the same problem.
I am able to edit anything at both 00 to 030 and 080 to 0B0 in the edit buffer and able to save in .bin or in .e2p format but
when given 'write all', it comes only 'write failed ' message. immediately if i give 'read all ' command, i see at 00 to 030 the same original data
ie nothing is rewritten,but at 080 to 0b0 it is being written as edited-----tried in several ways but in vain.
Can anybody help us ?
with advance thanks
kara
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| Re: Samsung CLP-300 reset chip by Vanko Micin (8/1/08 6:47 AM) reply | + / - | Hi again.
I made the circuit myself. And I'm having problems probing the device with PonyProg. Here is the picture at http://www.ziva-legenda.com/ostalo/chip.jpg Could anybody be so kind and double check if I got it right?
(I connected the power supply via USB, pin 5 of PC serial directly to GND from USB.)
Thanks.
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| Re: Re: Samsung CLP-300 reset chip by vanko Micin (8/1/08 9:09 AM) reply | + / - | Got it sorted out, the above circuit is OK. PonyProg did it. Thanks to all, especially to South Raven and John_UK.
Cheers.
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| Re: Samsung CLP-300 reset chip by south_raven (8/17/08 6:31 PM) reply | + / - | Has anyone had to find a way to reset the counter for the imaging unit yet?
Mine just shut down this evening without any warnings and says to replace it. Image quality and toner usage is still good so I would rather just rest it if possible.
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| Re: Samsung CLP-300 reset chip by sklute (8/20/08 9:06 PM) reply | + / - | I am having a problem with my Samsung CLP-300. For some reason, on the right side of all of my pages (~2") the printout looks like the text is bolded. Any ideas?
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| Re: Samsung CLP-300 reset chip by nickrh (8/24/08 2:25 PM) reply | + / - | As enlightened people mentioned above..
*The printer only zaps the chip when the cartridge is empty
*New cartridges supplied with the printer have no chip
In which case, it might follow that after the printer has read the cartridge once, it doesn't care if it can continue reading it when turned on and used subsequently. After all, if the new cartridges supplied with the printer have no chip, the printer doesn't need to talk to the chip to verify the cartridge is in fact properly inserted.
If this is the case, then you could presumably present a chip to the printer, then remove/cover the chip before the printer zaps it, so that it can be used again.
Although, as stated above, the same chip can't be used again immediately, another chip would need to be used with a different CRUM to tell the printer the cartridge has been exchanged.
Just a thought.. !
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| Re: Re: Samsung CLP-300 reset chip by Anonymous (8/24/08 6:16 PM) reply | + / - | Actually, after looking at it closer, almost all of the page it very light except for aboyut 2" on the right side. Any ideas?
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| Re: Samsung CLP-300 reset chip by South_Raven (8/26/08 8:25 AM) reply | + / - | Sounds like you need to clean off the metering blade on the black housing. I've found out through heavy usage that the metering blades are one of the weak spots on these printers as far is image quality and that toner will cake on the blade and cause anything from mild streaking to an overall faint image.
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| Re: Re: Samsung CLP-300 reset chip by Anonymous (8/26/08 10:07 AM) reply | + / - | I have no idea how to clean off the metering blade on the black housing. Could you PLEASE let me know how? Feel free to email me at briansklute@lizmoore.com if you prefer. Thanks!
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| Re: Samsung CLP-300 reset chip / xerox 6110 eur by Anonymous (8/26/08 5:16 PM) reply | + / - | I have a Xerox 6110; I made the programmer and it works, it reads and it writes.
I purchased 4 chips CMYK and now I am trying the black chip.
But it does not work.
The dump shows a code similar to the one posted for the Samsung, but it has the word EUR instead of EXP and other minor differences. It seems reasonable, but the printer red led says that the printer does not like this black toner (and it said "invalid")
I am guessing that the chip should be for the CLP-300... this was also on the envelope; the vendor assured me it works for the Xerox, but it does not work... and it seems the printer can read the chip as it wrotes a couple of A5 (hex) in both 128 bit sections (so I put the chip in the correct position etc).
Can somebody link a dump gif image (or email me the e2p files) with the codes for *working* xerox chips?
I am puzzled as I have everything but apparently not what I need :( .
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| Re: Samsung CLP-300 reset chip by roghani (8/26/08 9:08 PM) reply | + / - | Change the word EUR to EXP and it works. Because the first one is EURopean version and the second is EXPort version. You are using an export version printer.
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| Re: Samsung CLP-300 reset chip by Anonymous (8/27/08 3:27 AM) reply | + / - | No it doesn't work either.
I changed EUR to EXP and I even tested the black dump posted here (EXP and EUR).
I forgot to say I am in europe so EUR should be ok.
The dump of the black chip I purchased is very similar to the one posted here by ben10
http://img352.imageshack.us/img352/5742/blackcompatibleol8.jpg
when I insert in the printer, it refuses the black. I see it wrote a couple of A5 in the 000040 row (same position of the ones in the 0000C0 row)
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| Re: Samsung CLP-300 reset chip by South_Raven (8/28/08 8:24 AM) reply | + / - | Try reading one of the expired Xerox chips and see what you get. Post an image of the dump and we might be able to figure them out. You should be able to read the Xerox versions ok but just not able to write to them.
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| Re: Samsung CLP-300 reset chip by Anonymous (8/28/08 8:47 AM) reply | + / - | update: I sent the (new, not expired) chips back to the vendor and he will replace them. I bought them several weeks ago and on the envelope it was "samsung CLP-300 chips", I complained about this but he said "they work also for Xerox".
I had the chance to test one chip (the black) only now, as I didn't use the printer so much meantime. The original black toner was without chip.
But the good part of the story is that I saved the email from the vendor (the response to my original complaint), so now I complained they seems actually not ok, and "I said this when I purchased, see here...". Yesterday they wrote "send us and we will replace", without questions or other comments.
Will let you know as soon as I have the replacements. My guessing is that the Xerox chip contains different data. Or something magic and I will have to end to buy original replacements :)
FYI the chip dump is almost identical to the one I copied the link in my previous post. Just the date and CRUM where different, and on the very bottom instead of 20? x (FF) there was written non(FF)samsung(FF)product
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