Thank you for your replay.
On the Samsung site there is no firmware at all for my model. I found FW on the net, but there is no loader in .rar file with FW. I have a problem, with my printer paper jam 1. I try to test sensors in test menu and feed sensor is not responding, so I replace feed sensor but sensor is still not responding. So I think the problem is in firmware.
I think it is offical samsung code. In .rar file is also offical release note .txt . I accept risk if printer will be unusable after FW upgrade. It is 6 years old and I get it for free, in the authorized service center they want 90€ for FW upgrade. So I will try to update it myself and if it will work OK, if not I will thrown it away.
I am looking for that program, it was on orginal CD disk with printer which I do not have it.