TroubleshootingSamsung ElectronicsService Manual 7-157.4.7. Can not sense when the Cover is Opened.Symptoms LCD Indicates "Ready" even when cover is opened.Check and Cause Solution1. Check if the Hook Lever inside the Duplex Cover isbroken or distorted.2. Check the Cover Open sensor, connectors and cableharness. Ensure that a signal reaches the main PBA3. Use the EDC mode to test the actuator.1. Replace the Duplex Cover.2. Replace the harness or microswitch as necessary.3. Replace the Sensor Board.7.4.8 Defective MotorSymptoms Main Motor does not work and paper does not feed when printing. Jam 0 is displayed.Check and Cause Solution1. Check if the Motor Harness or Motor PCB is brokenor not.2. Test the Motor using EDC Mode.1. Replace the Motor or Motor Harness.2. Replace the Main PBA.7.4.9 No PowerSymptoms Power is not supplied to the set, or the LCD display is not on.Check and Cause Solution1. Check the power supply input and DC voltage outputfrom the SMPS. Check the fuses in the SMPS.Check the wall socket.2. If the SMPS supply is OK, and the LCD still does notwork check the display connectors and cable harness3. Check if +24VDC or other Power Supplies are shortedout.1. Replace the Power Cable. Replace SMPS fuses. Ifthe fault recurs replace the SMPS.2. Replace cables or LCD Panel Ass'y. Replace theMain PBA.3. Replace the components used for +24VDC.
