Phaser 4400 Laser Printer Service Manual 2-29Jam at Front/Rear; Open Front/Rear Cover to Clear.(E7-#: Duplex Jam)E7-0: Paper arrives at the Registration Sensor early from the Duplex Sensor.E7-1: Paper is late to the Duplex Sensor.E7-2: Paper is late off the Duplex Sensor.The Duplex Sensor is on at power-on.E7-3: Paper is late to the Registration Sensor from the Duplex Sensor.Duplex Jam Troubleshooting ProcedureStep Actions and Questions Yes No1 1. Open the printer and check for paper or otherobstructions in the paper path.2. Remove the Duplex Unit and check the rear entrancechute to the Paper Handler.Is the printer free of jammed paper, paperscraps, or other obstructions?Go to step 2. Clear alljammedpaper, paperscraps, andobstructionsfrom theprinter.2 Check the Duplex Belt, Rollers, and gears. Check forcontamination, wear, and obstructions.Are the Duplex rollers, gears, and belt clean andin good condition?Go to step 3. Replacecomponentsor DuplexUnit asnecessary(RRP 12.1onpage 6-141).3 1. Reinstall the Duplex Unit and enter ServiceDiagnostics.2. Select Engine Test Print and press OK3. Scroll to Print Quantity and press OK.4. Set the quantity to 15 and press Back.5. Scroll to Duplex and press OK. Set duplex to ON.6. Scroll to Print Test Pattern and press OK.Does the error code reappear?Clear the jamand pressBack. Go tostep 4.Problemsolved.4 1. Select Motors/Fans Tests.2. Scroll to Duplex Motor High and press OK. The motorshould run for about three seconds.3. Scroll to Duplex Motor Low and press OK. The motorshould run for about three seconds.Can you hear the Duplex Motor run at bothspeeds?Go to step 5. Go to step 6.
