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#RESET CHIP FIX GENERATOR SAMSUNG CLP 325 HOW TO#
#RESET CHIP FIX GENERATOR SAMSUNG CLP 325 SERIAL NUMBER#
#RESET CHIP FIX GENERATOR SAMSUNG CLP 325 SOFTWARE#

Our chip should have the value A5, A5 at ox004A ox004B.

Now the steps that we should perform to have a fully permant chips are quite clear:

Printer does't check if the writing operations on the chip were succesfully accomplished.

Validation is performed by writing the same values at always the same locations.

Permanent ( software) write protection is turned onĪs it's possible to see, this lock protection has several flaws:.

When the toner finishes the process is the following one: The following image shows the bytes that are changed over time:

#RESET CHIP FIX GENERATOR SAMSUNG CLP 325 SOFTWARE#

I can say that this behaviour maybe depends from the software inside the printer, since from the tests performed with my printer, exchanging toner never increased the number of pages for that particular cartridge. 4 is controversal, because some people say that the printer resets its internal counter when the the installed toner is swapped with one that has been used but not finished.

Finally the printer stores internally the new CRUM number.

Note: PAGES seem to be crumbled and xored with some data like the CRUM number.

If 0x004A and 0x004B are both "A5", the printer sets its internal counter for PAGES and JOBS reading these data from the chip at 0x00C2-0x00C4 (PAGES), 0x00D4 (JOBS).

If the new CRUM number is valid for color and region, the printer writes 2 bytes (value A5) at 0x004A and 0x004B, to check if the eeprom has not been locked.

The printer checks if the new CRUM on the chip is different from the previous one stored internally (date is NOT checked, just the CRUM).

For the very first 1000 pages the chip is not required (toner sold with the printer have no chip).

When a new toner is inserted in the printer, the printer performs the following operations: "2000", the chip on the toner is marked as empty and permanently locked. The counter is increased by 1 for every printed page when the counter reaches i.e. The internal counter starts with a number of 0 and ends at 2000 for the black cartridge, or at 1000 for the other colors. The printer has an internal counter which is associated to the last read CRUM number.

I have used the term expire because locked cartridges are not necessarily empty. This eeprom is costantly written by the printer during all its lifetime span, and it's permanently locked when it expires.

#RESET CHIP FIX GENERATOR SAMSUNG CLP 325 SERIAL NUMBER#

Samsung clp-300 (the printer) track of the total number of the pages printed (referred as PAGES), it remembers other things as well, like the number of the print jobs (referred as JOBS) performed so far and the serial number of the toner cartridge (referred as CRUM number).Įach cartridge has a chip on it, which is basically a serial eeprom.

Two aftermarket chips (aftermarket reset chips based on at34c02).

Please refer to the very detailed schemes here: Chiprecharge Serial Programmer

#RESET CHIP FIX GENERATOR SAMSUNG CLP 325 HOW TO#

I2C eeprom programmer I will not describe how to build one on your own.Let's see how to cut the costs related to the chips with a permanent reset chip. The total refill cost is quite expensive, because you have to add to the toner powder ($6 per recharge) the reset chip ($7).

Common reset chips are cheap (4-7 dollars each), but they should be replaced as soon as the toner inside the cartridge finishes. Now I will present herein a technique that permits to turn the vast majority of aftermarkets (non OEM chips) into permanent reset chips this means that you can turn a single chip into one that will last forever, since it will never expire. It's almost a year that I own this beautiful printer and it's some time right now that I know a couple of very interesting tricks to enjoy it even more.įirst of all Samsung just released clp-310 (and it's black version: the clp-315): for all the owners of the clp-300 unfortunately it means that they are planning to dismiss this printer, since the new toner cartridges for clp-315 and clp-310 are very different from the older ones for clp-300.