Alignment and Troubleshooting4-35Service Manual4.2.2 Clearing LCD Error MessagesDisplay message Meaning Suggested solutionsRear Cover is openClose Rear Cover.The rear door was opened whileduplex printingClose the rear door.Data Read FailCheck USB keyTime expired while reading data. Try again.Data Write FailCheck USB keyStoring to the USB memory key failed. Check the available USB memoryspace.Device is not supported Non USB mass storage device, suchas USB mouse, is connected withUSB memory portRemove the non USB mass storagedevice from USB memory port.Document Jam CheckFeederThe loaded document has jammed inthe DADF.Clear the document jam.Toner Door is openClose Toner DoorThe front cover is not securely latched. Close the cover until it locks intoplace.Duplex jam 0Check InsidePaper has jammed during duplexprinting.Clear the jam. See "Clearing PaperJams"Remove paper& Open/Close Front DoorDuplex jam 1Check InsidePaper has jammed during duplexprinting.Clear the jam. See "Clearing PaperJams"Open Rear DoorFile format is notsupported.The selected file format is notsupported.Enter the correct item again.Fuser Door Open The fuser door is not securely latched. Open the rear door and close thefuser door until it locks into place. Forthe location of the fuser door, see“Clearing Paper Jams”.Open Rear DoorClose Fuser DoorFuser ErrorFuser Not InstalledCheck Rear DoorThere is a problem in the fuser unit. Unplug the power cord and plug itback in.If the problem persists, refer to thetroubleshooting for Fuser Error.Hub is not supported USB hub device is connected withUSB memory port.Remove the USB hub device fromUSB memory port.In Idle State : [yyy]Empty/OpenIn Printing State : [yyy]Empty/Open Load [zzz][xxx]The paper in the paper tray has runout.Load paper in the paper tray.