Pantum P2502W Toner Reset Chip help

[geekgirl1111]

Re: Pantum P2502W Toner Reset Chip help

What chip re-setter can I use for the Pantum chip?
Most are for epson..
Thanks!!

[zdm900]

Re: Pantum P2502W Toner Reset Chip help

Any progress? Would love to help in any way possible!

[khoalam]

Re: Pantum P2502W Toner Reset Chip help

Hi, I don't know if anyone still working on this toner chip, but I have some information to share. The protocol used for the toner chip is indeed I2C. I have confirm this with my oscilloscope. The printer will issue a Write request for Address 0x5b when the lid is closed.

[DJ_MIX]

Re: Pantum P2502W Toner Reset Chip help

Added Pics of Printer Board. Can anyone identify what type of chip 423K3 is?
Only other chip I found on this board that may be helpful is the bios Chip MX 25L6406E.

Maybe the toner count is stored on this chip? Either way I plan to dump the chips contents. Maybe after the toner is empty I'm going to restore the dump back to chip and see if that sets the toner count back to original. If that works I will hard wire it with connector for future restores.

[DJ_MIX]

Re: Pantum P2502W Toner Reset Chip help

with this logic analyser, what would I be able to see?
I dont see how it would help me figure out what chip is on that toner chip

This is all new to me so bare with me. Any links on this subject is helpful.

I assume the chip is on that tiny board or is it on the printer.

[stj]

Re: Pantum P2502W Toner Reset Chip help

because you need a logic analyser.
like the saleae
(or better yet, a chinese ebay clone!)

[DJ_MIX]

Re: Pantum P2502W Toner Reset Chip help

I give up on this project. Without knowing what chip is on that board. it's very difficult to read contents with my eeprom reader.

[DJ_MIX]

Re: Pantum P2502W Toner Reset Chip help

OK got some voltages and found Ground.
This weekend I will try to hook it up to my programmer and see what happens

[DJ_MIX]

Re: Pantum P2502W Toner Reset Chip help

Ok great Thanks.
I uploaded I2C Pin out. Most likely will need to find SDA and SCL.

I should be able to this with my EETools topmax programmer. Never dealt with I2c chips, so all new to me

[stj]

Re: Pantum P2502W Toner Reset Chip help

exctly - maybe even follow the tracks back to the controller.

[DJ_MIX]

Re: Pantum P2502W Toner Reset Chip help

I guess I can find VCC, and GND from the printer itself??
from the pogo pins that touch the chip?

[stj]

Re: Pantum P2502W Toner Reset Chip help

there is probably nothing but silicon under those blobs.

if you want to do this, start by working out what the contacts are.
find the ground, then find the supply voltage.
after that probe the remaining 2 to see what interface it is.
probably I²C

[DJ_MIX]

Need help just bought this cheap Laser printer.
They all now come with these chips to limit refilling.

Anyway I remove the chip but it has this black blob over the chip. I was hoping to remove the black stuff off to see what chips it uses to read the contents.

I tried heating it up with heat gun a bit and it does not melt at all, it's rock hard.

I have a EETools Topmax programmer, but without any info on what the 4 pins do, don't know if I will be able to read the chip information.

What I'm asking is has anyone have any ideas ho to tackle this.

attached pic of chip