Cut settings wrong?

Hi… I Ve started since 1month working with my laser, but After some days the module can t engraves or cuts no more, so as I had warranty I Ve received the second module laser. At the beginning It worked very well, but since Yesterday the cuts aren t no more clean, It burns and in some parts It can t pass throught, I can t see the Lines of cut. Am I wrong with some settings? Or Is losing Power Also this module?
I m working 3mm plywood, cut settings that I put are 2 pass, 200 mm/Min(but Also 180 the same thing), 90/95% max Power 50 Min power with air and constant Power. And I activate for cuts “passtgrought mode” but I don t Know what means “cut” and “jump” values that I must put.
Thank you

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