I have a IR 5570 that the customer uses legal size paper in tray 3 and 4. Since I took over machine tray 4 has never recognized legal paper. Now tray 3 does not, it usually goes to size U3. I have replaced the cassette paper size VR PCB FG5-1957-040 in both trays and ran the size adjust in service mode with statement size paper. Tray 3 sometimes will show it as legal but if you open tray to fill with paper or in the middle of a multi page print or copy job it will stop and say U3 size in tray. I have tried different tray inserts with no luck either. Any help would be greatly appreciated.