Sometimes during copy process (1 original 20 doublesided copies,the first few are fine then there is only the first side and the back side is blank,then after few more the first side is blank the second one is normal).Sometimes there isn't a problem during the whole process.During scanning process there is like 90% free memory and the machine freezes and there is need of manual reset.
If anyone had similar problems please tell us what may cause these problems.We are thinking about nvram issues mby.