5 years, 8 months ago.

Printer toner cartridge chips technology

I'd like to put my limited electronics knowledge to good use but have struggled to think of a worthwhile project. After building an ECG using an mbed and a handful of components I ran out of original ideas. I'd like to understand the technology used in toner cartridge chips which stops them working after so many pages. I have a pretty good Dell laser printer which didnt cost very much.Of course the cartridges are ridiculously expensive. I buy in chips from Shenzen and refill the cartridges saving 80% of cost of replacement cartridge. I'd like to know how the chips work and I'd like to make my own chips also. Can anyone give me a steer in the right direction ? If they can do it in China.......

Here is a picture of the chip used in my Dell 2335 printer. I have identified the 8 pin Atmel AT88SC chip but I dont know what the 20 pin square device is or what it does. I'm hoping there may be some way to reverse engineer the chip and read the programming. I assume the 6 copper pads are used during manufacture for programming the devices. Any comments will be read with interest. /media/uploads/GregMartin/chip.jpg

hyh yh y h

posted by Allen Dave 21 Jun 2018

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posted by Allen Dave 21 Jun 2018

This chip technology is really wonderful, I try this on my printer and really help me to take away my printer in the error state this is a really informative post I heard about this technology wheater there is any problem you can also try http://www.printererrorrepair.com/blog/how-to-fix-epson-printer-in-error-state-issue/ which may help you, like this help me.

posted by Amelia Ryan 06 Aug 2018

Nice to see that you hvae taken the initiative of providing the details about the internal structure and working of the printer. You can visit https://www.epsonsupport247.com/how-to-fix-epson-printers-common-problems-by-epson-printer-tech-support/ if you face any issues while using your printer.

posted by Genny Swiss 04 Jan 2019

1 Answer

5 years, 8 months ago.

The 20-pin square device is an Atmel ATTiny45V, an 8-bit AVR microcontroller.

The AT88SC chip is a crypto authentication chip.

Your Shenzen source must have gotten the key used by Dell for its cartridges somehow to be able to program the keys into the AT88SC chips.

As for counting pages, my guess would be that the ATTiny45V is doing this, and saving that information in its 256 bytes of EEPROM.

Accepted Answer

Question answered thank you

posted by Gregory Martin 06 Nov 2014

If you want to know.

posted by Allen Dave 21 Jun 2018