Panasonic NN-SM33HMY Service Manual Download Page 4

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POWER LEVEL & ACCESSORIES

This microwave oven is designed for household use only.

It is not recommended for commercial purposes.

DESCRIPTION

Microwave Power for Variable Cooking

Power level

ITEM

Control Complement

Rating Label Location

Accessories

Inside

Glass Tray
Ro

ller

ing

Instruction manual

Low

Medium

3 Watts

High

800 Watts

411 Watts

2 2

Summary of Contents for NN-SM33HMY

Page 1: ...to change without notice Watts 5 9 A Single phase 3 wire grounded 2 450 MHz 4 W x H x 0 D mm 12 7kg approx 2M219J Model No Panasonic Corporation 201 Unauthorized copying and distribution is a violation of law NN SM33HMY Volts AC 50 Hz 1 kg approx 2 L 315 W x 227 H x 349 D mm 1 220 85 287 40 4 7 3 SINGAPORE Silvery TE 0 35 min Watts full microwave power IEC60705 1270 800 ...

Page 2: ...ervice test or inspection within the microwave generating compartments check the magnetron wave guide or transmission line and cavity for proper alignment integrity and connections D Any defective or misadjusted components in the interlock monitor door seal and microwave generation and transmission systems shall be repaired replaced or adjusted by procedures described in this manual before the ove...

Page 3: ...4 1 OPERATING SEQUENCE 4 2 SCHEMATIC DIAGRAM 4 3 CIRCUIT DESCRIPTION 4 4 SERVICE INFORMATION 5 1 TOOLS AND MEASURING INSTRUMENTS 5 1 MICROWAVE LEAKAGE TEST 5 1 MEASUREMENT OF MICROWAVE POWER OUTPUT 5 3 DISASSEMBLY AND ADJUSTMENT 5 3 INTERLOCK CONTINUITY TEST 5 7 COMPONENT TEST PROCEDURE 5 8 TROUBLE SHOOTING 5 12 EXPLODED VIEW 6 1 REPLACEMENT PARTS LIST 7 1 ...

Page 4: ...d use only It is not recommended for commercial purposes DESCRIPTION Microwave Power for Variable Cooking Power level ITEM Control Complement Rating Label Location Accessories Inside Glass Tray Ro R ller ing Instruction manual Low Medium 3 Watts High 800 Watts 411 Watts 2 2 ...

Page 5: ...tron be assembled to the waveguide and cavity Never operate the magnetron unless it is properly installed Be sure that the magnetron gasket is properly installed around the dome of the tube whenever installing the magnetron 2 1 CAUTIONS Unlike other appliances the microwave oven is high voltage and high current equipment Though it is free from danger in ordinary use extreme care should be taken du...

Page 6: ...urdy and flat surface at least 10 cm 4 inches from the wall 7 Place the microwave oven as far away as possible from TV RADIO COMPUTER etc to prevent interference EARTHING INSTRUCTIONS This microwave oven is designed to be used in a fully earthed condition It is imperative therefore to make sure it is properly earthed before servicing WARNING THIS APPLIANCE MUST BE EARTHED IMPORTANT As the colors o...

Page 7: ...PANEL Oven Front Plate Safety Door Lock System Control Panel Roller Ring Glass Tray See Through oven window Door C 2 1 4 3 1 Cooking mode select dial 2 Defrost power 3 Microwave power 4 Time weight select dial NN SM33HM W NN SM32HM Control panel ...

Page 8: ...ingle ring sound and the lamp is turn off NOTE Each number represents minutes To ensure accurate timing it is advisable to turn the timer knob slightly passed the desired cooking time and then back to the proposed setting Press the door opener to check the cooking condition during oven operation Opening the door during oven operation automatically turns off the oven and stops the timer If cooking ...

Page 9: ...SCHEMATIC DIAGRAM 4 3 ...

Page 10: ...d from the filament winding of the high voltage transformer This 3 2 volts is applied to the magnetron to heat the magnetron filament through two noise preventing choke coils A high voltage of approximately 2100 volts AC is generated in the secondary of the high voltage transformer which is increased by the action of the diode and charging of the high voltage capacitor The negative DC voltage is t...

Page 11: ...hich is graduated to 600 cc and place the beaker on the center of the turntable Set the energy leakage monitor to 2450 MHz and use it following the manufacturer s recommended test procedure to assure correct result When measuring the leakage always use the 2 inch 5cm spacer supplied with the probe Operate the oven at its maximum output Measure the microwave radiation using and electromagnetic radi...

Page 12: ...e test probe must be removed no faster than 1 inch sec 2 5 cm sec along the shaded area otherwise a false reading may result The test probe must be held with the grip portion of the handle A false reading may result if the operator s hand is between the handle and the probe When testing near a corner of the door keep the probe perpendicular to the surface making sure the probe horizontally along t...

Page 13: ...T 0 55 X T2 T0 X M T T2 Temperature after heating T0 Temperature of bowl M Weight of bowl is measured while the microwave generator is operating at full power Magnetron filament heat up time is not included about 3 sec The water is stirred to equalize temperature throughout the vessel prior to measuring the final water temperature Stirring devices and measuring instruments are selected in order to...

Page 14: ...EMOVAL 1 Discharge the high voltage capacitor 2 Disconnect the leadwire from magnetron high voltage transformer and capacitor 3 Remove the screw holding the high voltage transformer to the baseplate to the Cavity Ass y 2 Remove two screws holding the Hinge F 1 Discharge the high voltage capacitor 2 Disconnect the leadwire from fan motor noise filter and high voltage capacitor 3 Remove the two scre...

Page 15: ... cavity ASS Y 7 After rep the motor rotate the removed turntable motor cover 8 Fit the turntable motor cover s projecting part to the glass tray lacing Base plate NOTE 1 Remove the wire lead from the turntable motor VERY CAREFULLY 2 Be sure to grasp the connector not the wires when removing NOTE 1 When removing the magnetron make sure its dome does not hit any adjacent parts or it may be damaged m...

Page 16: ...heck for play in the door by pushing the door release button Door movement should be less than 0 5 mm 1 64 inch Don t push the door release button while making adjustment Make sure that the latch moves smoothly after adjustment are completed and that the screws are tight Make sure the primary monitor and secondary switches operate properly by following the continuity test procedure 5 6 ADJUSTMENT ...

Page 17: ...n circuit in the door open condition When the door is closed meter should indicate an closed circuit When the secondary switch operation is abnormal make the necessary adjustment or replace the switch only with the same type of switch C MONITOR SWITCH TEST Disconnect the wire lead from the monitor switch Connect the ohmmeter leads to the common COM and normally closed NC terminals of the switch Th...

Page 18: ...EDURE RESULTS HIGH VOLTAGE TRANSFORMER Wire leads removed MAGNETRON Wire leads removed 1 Measure the resistance Ohm meter scale Rx1 Primary winding Secondary winding Filament winding 2 Measure the resistance Ohm meter scale Rx1000 Primary winding to ground Filament winding to ground 1 Measure the resistance Ohm meter scale Rx1 Filament terminal 2 Measure the resistance Ohm meter scale Rx1000 Filam...

Page 19: ...x10000 Measure the continuity Reverse Ohm meter scale Rx10000 Normal Momentarily indicates several ohms and then gradually returns to Normal Normal Abnormal Continuity NOTE When testing the magnetron be sure to install the magnetron gasket in the correct position and be sure that the gasket is in good condition Antenna Gasket Chassis Filament 10M ohms NOTE Some inexpensive meters may indicate infi...

Page 20: ...acing the fuse If the fuse is blown by improper switch operation replace the defective switch and the fuse at the same time Replace just the fuse if the switches operate normally Normal Abnormal TIMER MOTOR Wire leads removed Below specified temperature specified temperature Above TIME SW Note TIME S W and microwave A is A Ω Abnormal or several Normal Approx 10 30K Ω Measure the resistance Ohm met...

Page 21: ...e resistance Ohm meter scale R x 1000 Normal Abnormal or several Ω Abnormal or several NOTE A MICROWAVE LEAKAGE TEST MUST ALWAYS BE PERFORMED WHEN THE UNIT IS SERVICED FOR ANY REASON MAKE SURE THE WIRE LEADS ARE IN THE CORRECT POSITION WHEN REMOVING THE WIRE LEADS FROM THE PARTS BE SURE TO GRASP THE CONNECTOR NOT THE WIRES 00 500 1 Ω Normal Approx 100 200KΩ Ω ...

Page 22: ... does not work Inserting many plug into one plug outlet and using them at the same time causes overloading Microwave oven plug is not inserted tightly Output power is too low Low AC input voltage Food temperature is too low Using metallic ware and allowing it to touch the oven wall Sparks occurring Inconsistent intensity of microwave by their characteristics 1 Wrap the thinner part with aluminum f...

Page 23: ...ormer Malfunction of the monitor switch Replace fuse primary monitor and secondary switches Check continuity of monitor switch with door closed Check continuity of primary switch with door opened Disconnect one side of the wire lead connected from transformer to the high voltage capacitor and operate the unit Replace fuse TROUBLE 1 Oven lamp does not turn on when the timer knob is with door closed...

Page 24: ...itch Malfunction of the timer switch Faulty thermostat Adjust or replace Adjust or replace replace replace Check the continuity of the primary switch with door closed Check the continuity of the secondary switch with secondary switch pushed Check the continuity of the timer switch contacts Check the continuity of the thermostat TROUBLE 2 Oven does not start even though the timer is set ...

Page 25: ...or burn out Abnormal Abnormal Defective monitor resistor Defective AC relay Open the secondary winding of the high voltage transformer of faulty insulation of filament winding Replace Replace Replace Check the monitor resistor Check the AC realy Check the AC realy Normal Abnormal Shorted H V diode Replace Check H V diode Abnormal Faulty capacitor Replace Check H V capacitor Abnormal Faulty magnetr...

Page 26: ...6 1 EXPLODED VIEW INTRODUCTION OVEN CAVITY PARTS INTERIOR PARTS BASE PLATE PARTS LATCH BOARD PARTS CONTROL PANEL PARTS DOOR PARTS ...

Page 27: ...6 2 DOOR PARTS D03 ...

Page 28: ...6 3 CONTROL PANEL PARTS 01 C12 C12 C12 C01 C55 E20 ...

Page 29: ...6 4 OVEN CAVITY PARTS ...

Page 30: ...6 5 LATCH BOARD PARTS ...

Page 31: ...INTERIOR PARTS 6 6 ...

Page 32: ...6 7 BASE PLATE PARTS ...

Page 33: ...A00 12270000012904 OVEN CAVITY 1 A01 12570000001396 CEILING COVER 1 B01 12270000027436 BASE 1 B02 12170000000192 RUBBER FOOT 4 B03 12270000006140 LOWER HINGE 1 C01 12170000A18130 ESCUTCHEON BASE 1 C12 12170000021898 TIMER KNOB 2 C55 12270000000213 ESCUT BACK PLATE 1 E20 17470000000658 TIMER SWITCH 1 D01 D05 12270000003759 12170000 009518 DOOR E UNIT 1 D02 12170000003878 DOOR KEY A 1 D03 1297000000...

Page 34: ...00002299 MICROSWITCH MONITOR SWITC 1 L05 17470000001394 LEAD WIRE HARNESS 1 T01 11002014000070 TURNTABLE MOTOR 1 T02 12170000000432 PULLY SHAFT 1 T03 12170000004334 ROLLER RING U 1 T04 12570000001008 COOKING TRAY 1 W01 12170000004299 ORIFICE 1 W02 12170000000206 FAN BLADE 1 W03 11002017000384 FAN MOTOR 1 W04 12270000000175 AIR GUIDE A 1 Z01 12270000006211 BRACKET H V CAPACITOR 1 Z22 12670000000424...

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