reset chip fix generator samsung clp 325 printer

Reset Chip Fix Samsung Clp 325 Printer Serial IC Bus

However the official version doesnt work with the 24C04 because of some timing issues.

It printed fine, but I suspected that the toner was probably almost empty.

New toner cartridges are more expensive than the value of the printer.

It is even worse with color laser printers, since they need four cartridges.

But I figured that I would try to refill the toner cartridges once the time comes.

So I bought it. It turned out that the toner cartridges where not completely empty.

Only then I found out that the cartridges contain a build-in page counter a little electronic circuit board which stops you from using the cartridge even if its refilled.

Well, those are really lousy business practices if you ask me.

The manufacturer forces you to buy an expensive new cartridge, even though it would continue to work perfectly by refilling it.

It runs on MS-DOS.

And you have to fabricate a connector cable which connects the parallel port of a PC to the three contacts of the toner cartridge.

And luckily, I had an ancient PC with a parallel port collecting dust in the attic which was still working.

It worked at the first try.

Reset Chip Fix Samsung Clp 325 Printer Serial IC Bus

What do you know Its a 4 Kbit EEPROM programmable through a serial IC bus.

Doesnt the Raspberry Pi have IC capabilities Some more goggling.

Because more people probably own a Raspberry Pi nowadays then a PC or laptop with a parallel port.

I write down the steps here for anybody who wants to give it a shot as well.

I figure that they are creating the power rail internally by flattening the clock signal.

But I think the pin layout is the same on the other models (make sure to check first).

Here are some pictures of the pin layout and how I connected the Pi to the toner cartridge.

I used some crocodile clips soldered to a 0.1 female header connector.

First, we need to add the i2c modules i2c-bcm2708 and i2c-dev to etcmodules.

The i2c bus at the GPIO header of my Raspberry Pi correlates to the i2c device at bus 1.

Here we can see that there is something available on bus 1 at the addresses 0x56 and 0x57.

It turns out that the EEPROM contains 512 bytes in two banks with each 256 bytes, which are addressed through those two i2c addresses.

Reset Chip Fix Generator Samsung Clp 325 Printer