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Now downloading free:Samsung 6.Troubleshooting

Samsung 6.Troubleshooting free download

Microwave ovens service manual and repair instructions

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File name:6.Troubleshooting.pdf
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Descr: Samsung Microwave ME21F707MJT_AA Service Manual 6.Troubleshooting.pdf
Group:Electronics > Consumer electronics > Microwave Ovens
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File name 6.Troubleshooting.pdf

5. Troubleshooting PRECAUTION 1. CHECK GROUNDING BEFORE CHECKING FOR TROUBLE. 2. BE CAREFUL OF THE HIGH VOLTAGE CIRCUIT. 3. DISCHARGE THE HIGH VOLTAGE CAPACITOR. 4. WHEN CHECKING THE CONTINUITY OF THE SWITCHES OR TRANSFORMER, DISCONNECT ONE LEAD WIRE FROM THESE PARTS AND THEN CHECK CONTINUITY WITHOUT THE POWER SOURCE ON. TO DO OTHERWISE MAY RESULT IN A FALSE READING OR DAMAGE TO YOUR METER. 5. DO NOT TOUCH ANY PART OF THE CIRCUIT OR THE CONTROL CIRCUIT BOARD, SINCE STATIC DISCHARGE MAY DAMAGE IT. ALWAYS TOUCH GROUND WHILE WORKING ON IT TO DISCHARGE ANY STATIC CHARGE BUILT UP. 5-1 Electrical Malfunction Oven is dead. (No display and no operation at all.) Open or loose lead wire harness Fuse is OK Open thermal cutout (Magnetron) Check fan motor when thermal cutout is defective. Open low voltage transformer Check Ass'y PCB when L.V.T is defective. Defective Ass'y PCB Shorted lead wire harness Defective primary latch switch (NOTE 1) Defective monitor switch (NOTE 1) Check adjustment of primary, interlock monitor, power relay, door sensing switch. Shorted H.V.Capacitor Shorted H.V.Transformer (NOTE 2) NOTE 1: All of these switches must be replaced at the same time. (refer to adjustment instructions) Check continuity of power relay contacts and if it has continuity, replace power relay also. NOTE 2: When H.V.Transformer is replaced, check diode and magnetron also. Oven does not accept key input (Program) Key input is not in-Sequence Refer to operation procedure. Oven does not accept key input Open or loose connection of membrane key pad to Ass'y PCB Shorted or open membrane panel Defective Ass'y PCB Replace PCB main. 30 5. Troubleshooting Timer starts countdown but no microwave oscillation. (No heat while oven lamp and fan motor turn on.) Timer starts Off-alignment of latch switches Adjust door and latch switches. countdown but no microwave Open or loose connection of high Check high voltage component according to oscillation voltage circuit especially magnetron component test procedure and replace if it is filament circuit (NO

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