Pantum P2502W Toner Reset Chip help

[kad09]

Re: Pantum P2502W Toner Reset Chip help

Hello, I have been trying somehow to make the pantum p2500w printer work without the chip that the toner comes from the factory.

Is there any way to edit the firmware of these printers? Or someone who knows the method to obtain the firmware?

What is your board model ?

[DJ_MIX]

Re: Pantum P2502W Toner Reset Chip help

Can someone modify my extracted firmware. I used a spi programmer to read the chip.
Btw this a early firmware

[DJ_MIX]

Re: Pantum P2502W Toner Reset Chip help

Can someone modify my extracted firmware. I used a spi programmer to read the chip.
Btw this a early firmware

I believe it's version 1.1.3.4. What tools do I need to decompile this firmware?

[timschuerewegen]

Re: Pantum P2502W Toner Reset Chip help

I believe it's version 1.1.3.4. What tools do I need to decompile this firmware?

First you need to extract/decompress the firmware using offzip.
offzip.exe -a "pantum toner empty.bin"
You can then disassemble the generated "00020120.bin" ELF file with Ghidra.

[DJ_MIX]

Re: Pantum P2502W Toner Reset Chip help

First you need to extract/decompress the firmware using offzip.
offzip.exe -a "pantum toner empty.bin"
You can then disassemble the generated "00020120.bin" ELF file with Ghidra.

Thanks for the help, I was able to extract the bin file and working on getting ghidra up and running.

I found NoChip_CA2J000228_P2500w_1.2.9.7.fwr and downloaded the file.

Do you know where the printer ID is stored in the fwr file. I was hoping to just use hexedit and overwrite my printer id in the this modified file.

BYW I can't send you a private message

[DJ_MIX]

Re: Pantum P2502W Toner Reset Chip help

File attached, Chipless firmware just need to figure how to modify for your printer ID.

[timschuerewegen]

Re: Pantum P2502W Toner Reset Chip help

File attached, Chipless firmware just need to figure how to modify for your printer ID.

BASE64 decode that string and you get "CA2J000228P2500w".

[DJ_MIX]

Re: Pantum P2502W Toner Reset Chip help

BASE64 decode that string and you get "CA2J000228P2500w".

Thanks once again, I think I got it.. Maybe during weekend will attempt.

[kad09]

Re: Pantum P2502W Toner Reset Chip help

Can someone modify my extracted firmware. I used a spi programmer to read the chip.
Btw this a early firmware

I can help, I need an exact model of the board that is written on textolite.

[kad09]

Re: Pantum P2502W Toner Reset Chip help

Thanks once again, I think I got it.. Maybe during weekend will attempt.

Overwriting the serial number in base64 will not help, the rest of the contents are encoded by the firmware program.

[DJ_MIX]

Re: Pantum P2502W Toner Reset Chip help

I can help, I need an exact model of the board that is written on textolite.

Kado09, take a look at post #10 on page 1.
I posted pictures of my board long time ago.

Thank you all for your help, I hope this also helps others.

[kad09]

Re: Pantum P2502W Toner Reset Chip help

Kado09, take a look at post #10 on page 1.
I posted pictures of my board long time ago.

Thank you all for your help, I hope this also helps others.

Try flashing this in spi flash.

[DJ_MIX]

Re: Pantum P2502W Toner Reset Chip help

Try flashing this in spi flash.

Just tried it, it keeps flashing green led2.

Also it has a wifi password setup

also tried test print and it gives error message.

[DJ_MIX]

Re: Pantum P2502W Toner Reset Chip help

Need help with modding printer id in my backup bin file.
I tired to change to CA2J000228, but after flashing it reads AA2A000000.

I attached original and modify file.

[timschuerewegen]

Re: Pantum P2502W Toner Reset Chip help

Need help with modding printer id in my backup bin file.
I tired to change to CA2J000228, but after flashing it reads AA2A000000.

There is a checksum somewhere I think.

[DJ_MIX]

Re: Pantum P2502W Toner Reset Chip help

There is a checksum somewhere I think.

Do you think the printer id is also stored on another chip also? or only in firmware

[timschuerewegen]

Re: Pantum P2502W Toner Reset Chip help

Do you think the printer id is also stored on another chip also? or only in firmware

Probably not. You can change the serial number via USB by using the AclSetSerialNumber command. I also checked the code that writes the serial number to the flash chip, and it does calculate a checksum.

[timschuerewegen]

Re: Pantum P2502W Toner Reset Chip help

I tired to change to CA2J000228, but after flashing it reads AA2A000000.

Try this checksum. It should be correct.

[DJ_MIX]

Re: Pantum P2502W Toner Reset Chip help

Try this checksum. It should be correct.

Thanks that let me flash fwr, now the problem is that takes flash and then bricks
printer, both leds turn off and printer has no power.

try two different fwr's one with 3.2.2.8 firmware and 1.2.9.7 fwr both not work.

[DJ_MIX]

Re: Pantum P2502W Toner Reset Chip help

Just went back to backup firmware bin, now printer is printing!! it's say 35% used.
Tried covering chip and won't print but now have 35% used and able to print.

I made image backup and tried again the fwr chipless firmware and the printer bricked.

Just to confirm it was not a hardware issue, I upgraded firmware through pantum tool and it updated my firmware no issue.