How to downgrade firmware version of Samsung printer

Version V3.00.02.xx: V3.00.02.01, V3.00.02.02, V3.00.02.03, V3.00.02.04, V3.00.02.05…
Compatible models: Samsung CLX-3300 series(3305, 3305F, 3305W, 3305FW), Samsung SCX-3400/3405/3407, Samsung SCX-3405F/W, Samsung SCX-4650N, Samsung SCX-472x, Samsung ML-2165W, Samsung CLP-360/365, Samsung CLP-360W/365W, Samsung ML-2160, Samsung ML-2164…

Samsung has once again strengthened encryption firmware, and released a new version of the form VX.XX.02.XX. Last week, I already got a new phone from a supplier with such filth.

Now encrypted not only the kernel, but the loader and a dump of the file is no longer possible to do. In addition, added a checksum, however, the standard algorithm – CRC32. Another joy debug mode is cut on the eggs. And most importantly, added validation of digital signatures ECDSA .

Based on the foregoing, we conclude: downgrade to version V3.00.01.19 – the only working option. Pick up the key signature is unrealistic, that is on firmware version V3.00.02.xx will never happen! (If the key is not accidentally flow away).

We need:

Programmer for flashing SPI FLASH (more about it at the end of the article).
Soldering station with a hairdryer.
Tweezers.
HEX-editor.
The original firmware, which will reduce the.

Start to downgrade firmware version of Samsung printer:

1. Put the machine on its side, up the side, which is inserted USB-cable:

2. Removing the cover:

3. Disconnect the wires and cables, remove the MAIN BOARD:

4. Here it is:

5. Overturn on the reverse side is a octopus th flash drive, it is something we need:

6. With the soldering station and tweezers remove the USB flash drive:

7. Inserted into the adapter:

8. A adapter – into the programmer:

9. Configure the programmer to work with a chip:

10. I was GD25Q32, but may be W25Q32 or other compatible spi-flash:

11. Read and just in case, save the dump:

12. Now prepare dump 19 version. To do this, open the full firmware file (take here: http://resetprinters.net/contact-us, and not only in Samsungs site, this is important!) and delete the title, ie, the first 120 bytes (0 × 78 in HEX-format):

13. Save the file and open it with the programmer, write the dump to a USB flash drive:

14. Soldered to a USB flash drive, return the card into place:

15. Print:

That’s it, nothing complicated, if there is a tool of work for 10-15 minutes.

Now the programmer. Just say scheme for PonyProg not work! Need support SPI FLASH, and he can only SPI EEPROM.

I have a MiniPro via USB, great speed, a good set of adapters and all this for less than 100 USD! The only negative – Chinese software, but this is easily corrected by installing softiny WizardProg (same programmer under the Russian brand) http://www.wizardprog.com/ download.htm

For those who want to make their own programmer propose several schemes: http://freesofts.info/wp-content/uploads/SPI_PROG.rar On some files can swear antivirus software, but it is false positives. I myself have not tested these schemes, as there MiniPro.

This way you can humiliate all devices are installed stick series 25Q:

SCX-3405, SCX-3405W, SCX-3405F, SCX-3405FW, SCX-4650N, SCX-4655FN, ML-2165W, CLP-365, CLP-365W, and the like

Ready dumps:

Printer Models	File BIN
Samsung SCX-3400/3405/3407	download
Samsung SCX-3405W	download
Samsung SCX-3405F / 3400F	download
Samsung SCX-4650N	download
Samsung SCX-472x	download
Samsung ML-2165W	download
Samsung CLP-360/365	download
Samsung CLP-360W/365W	download

Exceptions: ML-2160, ML-2164 (firmware in proce), CLX-3300 series (NAND Flash).

PS: This article was written for beginners, because ask a lot of questions for experienced craftsmen is obvious.