7-22 Samsung ElectronicsMaintenance & Troubleshooting7-4 MalfunctionError Status Check SolutionNo powerFuser ErrorCover openJam 0Jam 11. If supplying power differs from machine’spower rating, replace the machine.2. Replace it.1. Detach AC connector and measure theresistane between pin 1 and 2. If it is megohm,thermostat is open, Replace it.2. Check bad connector contact or wire is cut.3. Check thermistor wire and its connection.4. Replace Engine Control board1. Open top cover and press the lever with pen. IfController detects cover close, there is somemechanical trouble in top cover and lever’sassembly. If not so there is electrical problem.1. Check whether solenoid is working or not byusing DCU mode #6 (Acoustic judgement)2. Check feed sensor malfunction.Check if it is misplaced with paper widthsensor.3. Re-try inserting a fewer papers.•fan the papers and align•take out the loaded papers and insertthem reverse direction4. Take out the loaded papers and insert themreverse direction•inserted papers as recommended forManual Feeding?•When loading, tap the papers until paperdetect sensor senses loading5. When using long papers, use the StackerExtender6. Adjust Guide to fit the paper width1. It is mostly resulted from double feeding.Check paper is well stocked in feeder.2. Check feed actuator position and actuator’soperating. There may be stiff movind or doublereflection. If not so, check the operation of feedsensor by DCU mode #8.3. Check exit lever operation. Remore jam andcheck actuator moving by hand. If actuator istoo stiff, paper is wrapped around the heatroller. Remove obstacles or replace.1. Check power is supplying2. Check fuse F1 open1. Thermostat open2. AC wire open3. Thermistor wire open4. Engine Controller1. When close Top cover, check thelever is pressed2. Micro switch’s contact3. CPU and related circuitCheck where Jam 0 happens1. Paper is not picked up2. Paper is located in feed sensor3. Happened when inserting specificpapers such as envelope into theMPF (Multipurpose Paper Feeder)?4. Happened when inserting specificpapers such as envelope into theManual Feeder?5. Is the Stacker Extender is folded out?6. Does not the Guide Adjust distort thepapersPaper is stopped in just after of fuserunit.