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Model: PM14011

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Summary of Contents for PM14011

Page 1: ...Model PM14011...

Page 2: ...OF MICROWAVE 2 2 THE STRUCTURE AND WORKING PRINCIPLE OF MICROWWAVE OVEN 3 2 1 HIGH VOLTAGE RECTIFYING CIRCUIT 3 2 2 MICROWAVE GENERATER 3 2 3 COOLING SYSTEM 4 2 4 ELECTRIC CONTROL SYSTEM 4 3 TYPICAL C...

Page 3: ...ve guide or transmission line and cavity for proper alignment integrity and connections D Any defective or misaligned components in the interlock monitor door seal and microwave generation and transmi...

Page 4: ...s per second so do the molecule This kind of molecule swaying producing similar frictional heat from the interference and block of the action strength among the molecule and changed to microscopic mic...

Page 5: ...rature If something wrong with the cooling system cause the temperature too high the control system would cut off the power automatically to prevent microwave generator being damaged form the high tem...

Page 6: ...anode and would be harmful to the anode In order to reduce the surge voltage the filament of the magnetron must be connected as the FIG 2 3 shown In this figure when the anode current of the magnetro...

Page 7: ...en the door is open S1 S2 are closed due to the pilot switch S3 still at conducted condition would make the 120V voltage short circuited and fused the fuse and will never let the microwave oven workin...

Page 8: ...he food after it is reflected in the cavity repeatedly those which haven t been absorbed will be reflect to the magnetron A good designed oven cavity should have a good impedance matching with the mag...

Page 9: ...ant trough the effect to restrain the microwave leakage include high subharmonic have been much improved 3 3 T TY YP PI IC CA AL L C CI IR RC CU UI IT T A AN NA AL LY YA AS SI IS S O OF F M MI IC CR R...

Page 10: ...gnetron motors and the lamp would stop working simultaneously Moreover the thermal cutout has the self resuming character when the temperature lowered it will resume to close condition Circuit diagram...

Page 11: ...side with a screwdriver 8 Take off the hinge up FIG 4 2 9 Apart the doorframe from the doorplate FIG 4 2 10 Take off the hook spring with a pointed plier then the hook combination 11 Clamp the window...

Page 12: ...capacitor and the baseboard with a screwdriver To disassemble 1 Pull out the terminal plug of the time and power distributor 2 Take off the screw which fix the control panel with a screwdriver FIG 4...

Page 13: ...ubber lining tape stick it on the transformer as shown on the figure Then put on the seat and the right base board make sure the screw hole are tallied then tighten the four screws for the high voltag...

Page 14: ...e screws as FIG 4 11 and FIG 4 12 4 4 7 7 T TH HE E C CA AP PA AC CI IT TO OR R Firstly do as the 1 2 3 steps of of this part To disassemble 1 Pull the wires of the capacitor out 4 15 2 Loosen and tak...

Page 15: ...motor with two screws FIG 4 17 2 Plug in the two wires 3 Assemble and fix the middle base board with two screws FIG 4 18 4 Turn the oven back 5 As the FIG 4 19 shown fix in the turntable shaft suppor...

Page 16: ...the cabinet Discharge between one end of the capacitor and the baseboard with a screwdriver Means of dismantling the PC board and door release mechanism 1 Pull out all the terminal plug of the PC boa...

Page 17: ...ld be considered as normal But it is abnormal if the following noises occur 1 Sound wen wen noise 2 Long time shishi noise 3 Strike sound like Pipa pipa 5 5 2 2 S SP PO OT T E EX XA AM MI IN NI IN NG...

Page 18: ...d by a new one If it is enough to 2100V then check the filament voltage of the transformer with alternating 10V grade of an avometer the value should be about 3 4V FIG 5 5 If there is no voltage at al...

Page 19: ...is normal If the indicator of the avometer can t point out from zero to nine megaohms it indicates the high voltage capacitor has broken and should be replaced by a new one If it is normal between th...

Page 20: ...should be less than 1 milliwatt cm2 Generally it should be controlled below 0 75 milliwatt cm2 with some allowance If the leakage occurred at the right door crack adjust the screws which fix the inte...

Page 21: ...g being cleaned the felt should be refueled fully with engine oil for when the oven is operating the engine oil empty into the oil bearing slowly Fix the bearing cover with two screws turn the fan aro...

Page 22: ...ll 2 Repair the unit at no cost to the owner 3 Investigate the oven and ascertain the cause of the excessive leakage 4 Hold the oven in your facility and instruct the owner not to use the unil until t...

Page 23: ...ransformer Change the magnetron Change the time power distributor or the micro switch Fix them 3 The food can be heated but the lamp is not on The lamp broken The plug falls off Change a new lamp Inse...

Page 24: ...s cause the door crooked The door hook broken Adjust the hinge to rectify the position of the door Change the hook 10 The door release button fall off Worn out and aged after long time operating Overh...

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