hi guys any body can help me or incounter it before.when i copy in all tray when i used letter size it never fold and when i copy in lg 13" it folds in all cassets.in folded part there is no print.any body can help me please.
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Since there is no print in the folded area you know it is happening before transfer. Most likely in the registration area. Check registration drive/clutch. If it does it out of all trays then you have pretty much narrowed it down to registration or transport (unlikely to create a nice neat fold.) I'd bet the registration clutch/drive is slipping/overdriving.