Microwave Oven

Model No.

© Panasonic Corporation 2012 Unauthorizedcopying and distribution is a violation of law

NN-ST342M

Order No. MOD12 0837 8C E

25L

s

Power Requirement

Power Output

Microwave Frequency

Magnetron

Timer

Outside Dimensions

Cavity Dimensions

Net Weight

Shipping weight

Specifications subject to change without notice.

1,270 Watts (5.Single phase, 3 wire grounded

2,450 MHz

2M219J

Volts AC 50 60Hz220

800 Watts full microwave power (IEC60705)

0 ~ 99 min. and 50 sec.

1,270 Watts (10.Single phase, 3 wire grounded

Volts AC 60 HzNN-ST342M(RPM) NN-ST342M(RPH)

9A )

12.7kg (approx.)

13.7 kg (approx.)

4 (W) x (H) x 400(D) mm85 287

315(W) x 227(H) x 349 (D) mm

Silver

& 1203 A)(50Hz) /(6.2A(60Hz))

Latin America

This device is to be serviced only by properly qualified service personnel.Consult the service manual for proper service procedures to assure continued safety operation and for precautions to betaken to avoid possible exposure to excessive microwave energy.

PRECAUTIONS TO BE OBSERVED BEFORE ANDDURING SERVICING TO AVOID POSSIBLEEXPOSURE TO EXCESSIVE MICROWAVE ENERGYA) Do not operate or allow the oven to be operated with the door open.

B) Make the following safety checks on all ovens to be serviced before activating the magnetron or other

microwave source, and make repairs as necessary; (1) interlock operation, (2) proper door closing, (3)

seal and sealing surfaces (arcing, wear, and other damage), (4) damage to or loosening of hinges and

latches, (5) evidence of dropping or abuse.

C) Before turning on microwave power for any service 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 oven is released to the owner.

E) A microwave leakage check to verify compliance with the Federal Performance Standard should be

performed on each oven prior to release to the owner.

SAFETY PRECAUTIONS

CAUTIONMICROWAVE RADIATION

DO NOT BECOME EXPOSED TO RADIATION FROM THE MICROWAVE GENERATOROR OTHER PARTS CONDUCTING MICROWAVE ENERGY.

WARNING

This product should be serviced only by trained qualified personnel.

This service manual covers products for following markets.

When troubleshooting or replacing parts, please refer to the country identifications shown below for your

applicable product specification.

……For ……For RPM Peru, Chile RPH Panama, Mexico

(Page)

SAFETY PRECAUTIONS - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Inside front cover

SPECIFICATIONS - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1-1

CAUTIONS - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2-1

INSTALLATIONS - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3-1

OPERATING INSTRUCTIONS - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 4-1

FEATURES- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 4-1

CONTROL PANEL - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 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

CONTENTS

EXPLODED VIEW - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 6-1

REPLACEMENT PARTS LIST - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 7-1

SCHEMATIC DIAGRAM OF P.C.B. - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 8-1

1-1

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

Glass TrayRo Rller ing

Instruction manual

Inside

I

220 Watts

HGigh

DeGfrost

MGedium

LGow

800 Watts

80 Watts

440 Watts

550 Watts

Med

• DO NOT operate on a 2-wire extension cord duringrepair and use.

• NEVER TOUCH any oven components or wiring duringoperation.

• BEFORE TOUCHING any parts of the oven, alwaysremove the power plug from the outlet.

• For about 30 seconds after the oven stops, an electriccharge remains in the high voltage capacitor. Whenreplacing or checking, you must discharge the highvoltage capacitor by shorting across the two terminalswith an insulated screwdriver.

• Remove your watches whenever working close to orreplacing the Magnetron.

• NEVER operate the oven with no load.• NEVER injure the door seal and front plate of the oven

cavity.• NEVER put iron tools on the magnetron.• NEVER put anything into the latch hole and the

interlock switches area.

• Proper operation of the microwave oven requires thatthe magnetron be assembled to the waveguide andcavity. Never operate the magnetron unless it isproperly installed.

• Be sure that the magnetron gasket is properlyinstalled around the dome of the tube wheneverinstalling the magnetron.

2-1

CAUTIONS

Unlike other appliances, the microwave oven ishigh-voltage and high-current equipment.Though it is free from danger in ordinary use,extreme care should be taken during repair.

THE OVEN IS TO BE SERVICED ONLYBY PROPERLY QUALIFIED SERVICEPERSONNEL.

MICROWAVE RADIATIONPersonnel should not be exposed to themicrowave energy which may radiate from themagnetron or other microwave generatingdevice if it is improperly used or connection.All input and output microwave connections,waveguide, flange and gasket must be securenever operate the device without a microwaveenergy absorbing load attached.Never look into an open waveguide or antennawhile the device is energized.

ANTENNA

COOLING FIN

MAGNETRONCHASSIS GROUND

FILAMENTTERMINALS

MAGNETRON

GASKET

INSTALLATIONS

3-1

INSTALLING1. Empty the microwave oven and clean inside it with

a soft, damp cloth. Check for damage such asmisaligned door, damage around the door or dentsinside the cavity or on the exterior.

2. Put the oven on a counter, table, or shelf that isstrong enough to hold the oven and the food andutensils you put in it. (The control panel side of theoven is the heavy side. Use care when handling.)

3. Do not block the vent and the air intake openings.Blocking vent or air intake openings can causedamage to the oven and poor cooking results.Make sure the microwave oven legs are in place toensure proper air flow.

4. The oven should not be installed in any area whereheat and steam are generated, because they maydamage the electronic or mechanical parts of theunit.Do not install the oven next to a conventionalsurface unit or above a conventional wall oven.

5. Use microwave oven in an ambient temperatureless than 104°F(40°C).

6. Place the microwave oven on a sturdy and flatsurface at least 10 cm(4 inches) from the wall.

7. Place the microwave oven as far away as possiblefrom TV, RADIO, COMPUTER, etc., to preventinterference.

EARTHING INSTRUCTIONSThis microwave oven is designed to be used in a fullyearthed condition.It is imperative, therefore, to make sure it is properlyearthed before servicing

WARNING-THIS APPLIANCEMUST BE EARTHED

IMPORTANT

As the colors of the wires in the mains lead of thisappliance may not correspond with the coloredmarkings identifying the terminals in your plug,proceed as follows.

The wire which is colored green-and-yellow must beconnected to the terminal in the plug which is markedwith the letter E or by the earth symbol ( ) orcolored green or green-and-yellow.

The wire which is colored blue must be connected tothe terminal in the plug which is marked with the letterN or colored black.

The wire which is colored brown must be connectedto the terminal in the plug which is marked with theletter L or colored red.

BEFORE YOU BEGIN, READ THE FOLLOWING INSTRUCTIONS COMPLETELY AND CAREFULLY.

10cm

The wires in this mains lead are colored inaccordance with the following code:

Green-and-yellow: EarthBlue: NeutralBrown: Live

4-1

OPERATING INSTRUCTIONS

FEATURES

CONTROL PANEL

Oven Front Plate

Safety Door Lock System

Control Panel

Roller Ring

Glass Tray

See-Through oven window

Door C

(1) Display Window(2) Micro Power Pad(3) Time Pads(4) Turbo Defrost Pads(5) Auto Reheat Pad(6) Auto Cook Pads(7) Serving/Weight Pad(8) Timer/Clock Pad(9) Stop/Reset Pad

Before cooking: One tap clears all your instructions.During cooking: One tap temporarily stops the cooking

time of day appears in the display window.(10) Start Pad

After cooking program setting, one tap allows oven to begin

once during oven operation, Start Pad must be pressed again

process. Another tap cancels all your instructions and colon or

functioning. If door is opened or Stop/Reset Pad is pressed

to restart oven.

Beep Sound:

When a pad is pressed correctly, a beep will be heard.If a pad is pressed and no beep is heard, the unit did

programmed stages. At the end of any not or cannot accept the instruction. The oven will beep twice betweencomplete program, the oven will beep 5 times.

NN- ST342M

(1)

(2)

(3)

(4)

(9)

(5)

(10)

(6)

(7)

(8)

(RPM)

OPERATING SEQUENCEThe following is a description of component functionsduring oven operation.

1. SETTING THE CLOCK

NOTE: You can set 24 hour clock.

2. CANCEL FUNCTIONTouch the Stop/Cancel pad whenever you need tocancel an entry or a function currently in use.The display will either return to the last item enteredor to the clock.

This oven has a CHILD LOCK feature • TO SET CHILD LOCK

• Press start pad three timesL appear in the display.

• TO CANCEL CHILD LOCK• Press stop/cancel pad three times

L disappears.

4-2

Stop/Cancel Clock

Set the timeby pressing

Stop/Cancel

Desireddefrost Desired

Start

Stop/Cancel

Desiredcooking time

Desiredcooking power Start

3. MICROWAVE COOKING

time pads

program weight

Stop/Cancel

Desired Desired Start

program weightreheat

Clock

4. AUTO WEIGHT DEFROST

5. AUTO WEIGHT REHEAT

6. CHILD LOCK

CONTROL PANELNN- ST342M(RPH)

(1)(2)(3)

(4)

(9)

(5)

(10)

(6)

(7)

(8)

(11)

(1)(2)(3)(4)(5)(6)(7)(8)(9)

(10)

Tecla de Palomitas de maizTecla de Recalentamiento AutomáticoTecla de Cocción Automática

(12) (13)

Tecla de PotenciaTecla de Descongelación AutomáticaTecla de Porciones/PesoTecla de Minuto AutomáticoTecla de Más/MenosTeclas numéricasTecla de CronómetroTecla de Reloj(11)

Tecla dePausa/Cancelar

(12)

Antes de Cocinar: Un toque habilita sus instrucciones.Durante la cocción: Un toque detiene temporalmente el proceso decocción. Otro toque cancela todas sus instrucciones y la hora del díaaparece en la pantalla.

Tecla de EncenderUn toque permite al horno empezar su función. Si la puerta está abierta

tecla Pausa/Cancelar se oprime una vez durante la operación del tecla de Encender debe oprimirse otra vez para

horno.

(13)

o

lahorno, la reanudar el

trabajo del

Bip:Cuando una tecla es presionada correctamente, se

escucha un “bip ”, significa que la unidad

no

aceptó

o no pudo aceptar la instrucción. El horno hará 2 veces

programa completado, el horno hará 5 veces “bip”.

escuchará un “bip”. Si una tecla es presionada y no

“bip” entre las etapas programadas. Al final de cada

SCHEMATIC DIAGRAM

4-3

CIRCUIT DESCRIPTIONGENERAL DETAILS• The low voltage transformer supplies the necessary

voltage to the micom controller when power cord isplugged in.

• When the door is closed, the primary switch is ON, thesecondary switch is ON, and the monitor switch opens(contact COM and NO).

WHEN SELECTING COOKING POWERLEVEL AND TIME• The micom controller memorizes the function you set.• The time you set appears in the display window.• Each indicator light turns on to indicate that the stage

has been set.

WHEN TOUCHING THE START PAD• The coil of the relay is energized by the micom

controller.• Power input is supplied to the high voltage transformer

through the fuse to the primary switch and relay 2.• Turntable rotates.

• Cooking time starts counting down.• 3.2 volts AC is generated from the filament winding of

the high voltage transformer. This 3.2 volts is applied tothe magnetron to heat the magnetron filament throughtwo noise-preventing choke coils.

• A high voltage of approximately 2100 volts AC isgenerated in the secondary of the high voltagetransformer which is increased by the action of the highvoltage diode and charging of the high voltagecapacitor.

• The negative 4000 Volts DC is applied to the filamentof the magnetron.

WHEN THE OVEN IS SET AT ANY LEVELEXCEPT MAXIMUM.• The micom controller controls the ON-OFF time of relay

2 by the applied signal to vary the average output

power of microwave oven as POWER LEVEL. (refer to page 1-1)

WHEN THE DOOR IS OPENED DURINGCOOKING• Both the primary switch and relay 2 are cut off primary

winding voltage of the high voltage transformer.• ON-OFF of relay 2 is coupled electrically with opening

and closing of the secondary switch.• When the door is opened, the secondary switch is

opened and when the door is closed, the secondaryswitch is closed.

• The cooking time stops counting down.• Relay stops functioning.• As the door is opened, if the contact of primary switch

and relay 2 and/or secondary switch fails to open, thefuse opens due to the large current surge caused bythe monitor switch activation, which in turn stopsmagnetron oscillation.

4-4

L

FUSE

TRANS-FORMER

RELAY 2

MICOM CONTROLLER

SECONDARYSWITCH

SWITCH

N

MONITORSWITCH

PRIMARY

MONITORSWITCH

L

FUSE

FORMER

RELAY 2

MICOM CONTROLLER

SECONDARYSWITCH

PRIMARYSWITCH

N

• The fan motor rotates and cools the magnetron byblowing the air (coming from the intake on the

• The air is also directed into the oven to exhaust thevapor in the oven through the left side.

backplate).

TRANS-

CAUTIONS

• Be sure to check microwave leakage prior toservicing the oven if the oven is operative prior toservicing.

• The service personnel should inform themanufacture importer, or assembler of anycertified oven unit found to have a microwaveemission level in excess of 5 mW/cm2 and shouldrepair any unit found to have excessive emission levelsat no cost to the owner and should ascertain the causeof the excessive leakage. The service personnelshould instruct the owner not to use the unit until theoven has been brought into compliance.

• If the oven operates with the door open, the servicepersonnel should:- Tell the user not to operate the oven.- Contact the manufacturer.

• The service personnel should check all surface andvent openings for microwave leakage.

• Check for microwave leakage after every servicing.The power density of the microwave radiation leakageemitted by the microwave oven should not exceed 4 mW/cm2. Always start measuring of an unknown fieldto assure safety for operating personnel from radiationleakage.

MEASURING MICROWAVE ENERGYLEAKAGE• Pour 275±15cc of 20±5°C(68±9°F) water in a beaker

which is graduated to 600 cc, and place the beakeron the center of the turntable.

• Set the energy leakage monitor to 2450 MHz anduse it following the manufacturer's recommendedtest 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 radiation monitor by holding theprobe perpendicular to the surface being measured

Move probe along shaded area

Probe scanning speedLess than 2.5 cm/sec( 1in/sec)

5-1

SERVICE INFORMATION

TOOLS AND MEASURING INSTRUMENTS

MICROWAVE LEAKAGE TEST

NECESSARY TOOLSTools normally used for TV servicing are sufficient.Standard tools are listed below.

• Diagonal pliers• Long nose pliers• Phillips screwdriver• Flat blade screwdriver• Wrench (size 5mm)• Nutdriver (size 5mm)• Adjustable wrench• Soldering iron• Solder• Vinyl insulation tape• Polishing cloth

NECESSARY MEASURING INSTRUMENTS• TESTER(VOLTS-DC, AC., Ohmmeter)• Microwave survey meter- Holaday HI-1500

HI-1501- Narda 8100

8200• Inch scale• 600 cc non conductive material beaker (glass or plastic),

inside diameter: approx. 8.5 cm(31/2 in.)• Cylindrical and made of borosilicate glass vessel.

max. thickness: 3 mmoutside diameter: approx. 190mmheight: approx. 90mm

• Glass thermometer: 100°C or 212°F (1 deg scale)

MEASUREMENT WITH OUTER CASEREMOVED• When you replace the magnetron, measure for

microwave energy leakage before the outer case isinstalled and after all necessary components arereplaced or adjusted.Special care should be taken in measuring thefollowing parts. (Circled area of below Fig.)- Around the magnetron- The waveguide

MEASUREMENT WITH A FULLYASSEMBLED OVEN• After all components, including the outer case, are fully

assembled, measure for microwave energy leakagearound the door viewing window, the exhaust opening,and air inlet openings.

• Microwave energy leakage must not exceed the valuesprescribed below.

NOTE: Leakage with the outer case removedless than5 mW/cm2.sq. Leakage for a fully assembledoven (Before the latch switch (primary) isinterrupted) with the door in a slightly openedposition-less than 2 mW/cm2.sq.

NOTES WHEN MEASURING• Do not exceed meter full scale deflection.• The 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 thehandle.A false reading may result if the operator's hand isbetween the handle and the probe.

• When testing near a corner of the door, keep the probeperpendicular to the surface making sure the probehorizontally along the oven surface, this may possiblycause probe damage.

RECORD KEEPING AND NOTIFICATIONAFTER MEASUREMENT• After adjustment and repair of any microwave energy

interruption or microwave energy blocking device,record the measured values for future reference. Alsoenter the information on the service invoice.

• The microwave energy leakage should not be morethan 4 mW/cm2.sq. after determining that all parts arein good condition, functioning properly and genuinereplacement parts which are listed in this manual havebeen used.

• At least once a year, have the electromagnetic energyleakage monitor checked for calibration by itsmanufacturer.

WARNING : AVOID CONTACTING ANY HIGH VOLTAGE PARTS

5-2

5-3

MEASUREMENT OF MICROWAVE POWER OUTPUT

• Microwave power output measurement is made withthe microwave oven supplied at its rated voltage andoperated at its maximum microwave power setting witha load of (1000±5) g of potable water.

• The water is contained in a cylindrical borosilicate glassvessel having a maximum material thickness of 3 mmand an outside diameter of approximately 190mm.

• The oven and the empty vessel are at ambienttemperature prior to the start of the test.

• The initial temperature (T1) of the water is (10±2)°C. Itis measured immediately before the water is added tothe vessel. After addition of the water to the vessel,the load is immediately placed on the center of theturntable which is in thd lowest position and themicrowave power switched on.

• The time T for the temperature of the water to rise by avalue ∆ T of (10±2)°K is measured, where T is the timein seconds and ∆T is the temperature rise. The initialand final water temperatures are selected so that themaximum difference between the final watertemperature and the ambient temperature is 5°K.

4187 x (∆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 isoperating at full power. Magnetron filament heat-uptime is not included. (about 3 sec)

• The water is stirred to equalize temperature throughoutthe vessel, prior to measuring the final watertemperature.

• Stirring devices and measuring instruments areselected in order to minimize addition or removal ofheat.

WATER LOAD

TURNTABLE

P =

• The microwave power output P in watts is calculatedfrom the following formula :

NOTES:For simple tests of micromave power output, it by heating one litre water for one minute,minimum temperature rise should be 6 C

conduct

°

DISASSEMBLY AND ADJUSTMENTA. OUTER CASE REMOVAL

1) Disconnect the power supply cord from the outlet.2) Remove the screws from the rear and along side

edges of the case.The outer case must be moved backward to be liftedoff.

C. CONTROL PANEL ASSEMBLY

1) Disconnect the leadwire from the Timer motor2) Remove the screws for securing the control panel.3) Lift control panel ASS ’Y from the oven by the tab

unhooked.

B. POWER SUPPLY CORD

1) Remove the outer case.2) Disconnect two terminals, and remove one screw of

the earth terminal.

CAUTION: DISCHARGE THE HIGH VOLTAGE CAPACITOR BEFORE SERVICING

(refer to page 2-1)

5-4

D. DOOR ASSEMBLY REMOVAL1) Open the door.

CAUTION : Be careful not to damage Door Cby screwdriver.

3) Lift up and pull the door.

NOTE:1. After replacing the door, be sure to check that the

primary switch, monitor switch, and secondary switchoperate normally.

2. After replacing the door, check for microwave energyleakage with a survey meter. Microwave energy mustbe below the limit of 5 mW/cm2. (with a 275 ml waterload)

3. When mounting the door assembly to the ovenassembly, be sure to adjust the door assembly parallelto the chassis. Also adjust so the door has no playbetween the inner door surface and oven frameassembly. If the door assembly is not mountedproperly, microwaves may leak from the clearancebetween the door and the oven.

E. HIGH VOLTAGE TRANSFORMERREMOVAL

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 screws holding the orifice

oven cavity and remove the high voltage earth screw.

4) Remove the screw of the capacitor bracket.5) Remove the two screws holding the fan motor ASS’Y

to the Orifice

G. HIGH VOLTAGE CAPACITOR ANDDIODE REMOVAL

ORIFICE

to the diode

ASSEMBLY REMOVAL

ASS’Y

.ASS’Y

1) Discharge the high voltage capacitor.2) Disconnect the leadwire from fan motor, noise filter

and high voltage capacitor.

earth screw.4) Remove the screw holding the high voltage capacitor

bracket.

3) Remove the screw holding the Orifice the oven

Remove door Assembly

Remove door Assembly

5-5

H. AIR GUIDE ASSEMBLY REMOVAL1) Disconnect the leadwire from lamp, A.C Relay and

monitor resistor and magnetron.2) Remove the screw to the cavity.

I. MAGNETRON REMOVAL1) Disconnect the leadwire from the high voltage

transformer and high voltage capacitor.2) Remove the air guide.3) Carefully remove the mounting screws holding the

magnetron and the waveguide.4) Remove the magnetron until the tube is

clear from the waveguide.

J. REMOVING THE TURNTABLE MOTOR1) Remove the .2) Remove the pully shaft VERY CAREFULLY 3) Lay the unit down on its back.4) Remove the turntable motor cover.

The turntable base cover is easily removed bypinching the six parts with a wire cutting.

5) Disconnect the leadwire from the turntable motorterminals.

6) Remove the screw securing the turntable motor tothe oven cavity ASS’Y

7) After rep the motor, rotate the removedturntable motor cover.

8) Fit the turntable motor cover’s projecting part to thebase plate slit.

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 bedamaged.

magnetron.

2. When replacing the magnetron, be sure to installthe magnetron gasket in the correct position andbe sure that the gasket is in good condition.

3. After replacing the magnetron, check for microwaveleakage with a survey meter around themagnetron. Microwave energy must be below thelimit of 5 mW/cm2. (With a 275 ml. water load).Make sure that gasket is rigidly attached to the

To prevent microwave leakage, tighten themounting screws properly, making sure there is no gapbetween the waveguide and the magnetron.

Waveguide

MagnetronGasket

Magnetron

Dome

Waveguide Bracket

Magnetron

K. PCB ASSEMBLY REMOVAL1) Remove the control panel assembly from the

cavity. 2) Remove screws which hold the PCB to

control panel.3) Disconnect the flat cable from the PCB

take off the PCB .

L. INTERLOCK SYSTEM1) INTERLOCK MECHANISM

The door lock mechanism is a device which hasbeen specially designed to eliminate completelymicrowave activity when the door is opened duringcooking and thus to prevent the danger resultingfrom the microwave leakage.

2) MOUNTING OF THE PRIMARY/MONITOR/SECONDARY SWITCHES TO THE LATCHBOARD

3) INSTALLATION AND ADJUSTMENT OF THELATCH BOARD TO THE OVEN ASSEMBLY

• Mount the latch board to the oven assembly.• Adjust the latch board in the arrow direction so that

oven door will not have any play in it when the dooris closed.

• Tighten the mounting screw.• Check for play in the door by pushing the door

release button. Door movement should be lessthan 0.5 mm. (1/64 inch)Don't push the door release button while makingadjustment. Make sure that the latch movessmoothly after adjustment are completed and thatthe screws are tight. Make sure the primary, monitor,and secondary switches operate properly byfollowing the continuity test procedure.

5-6

ADJUSTMENTDIRECTION

CAUTION: CHECK THE CORRECT POSITION

MAGNETRON

H.V. TRANSFORMER

PRIMARY

H.V. CAPACITOR

H.V.DIODE

FIG. 1

the

and

C

S03

PRIMARYSWITCH

MONITORSWITCH

SECONDARYSWITCH

A. PRIMARY INTERLOCK SWITCH TESTWhen the door release button is depressed slowlywith the door closed, an audible click should beheard at the same time or successively atintervals. When the button is released slowly, thelatches should activate the switches with anaudible click.If the latches do not activate the switches whenthe door is closed, the switches should be aadjusted in accordance with the adjustmentprocedure. Disconnect the wire lead from theprimary switch. Connect the ohmmeter leads tothe common (COM) and normally open (NO)terminal of the switch. The meter should indicatean open circuit in the door open condition.When the door is closed, the meter shouldindicate a closed circuit.When the primary switch operation is abnormal,make the necessary adjustment or replace theswitch only with the same type of switch.

B. SECONDARY INTERLOCK SWITCH TESTDisconnect the wire lead from the secondaryswitch.Connect the ohmmeter leads to the common(COM) and normally open (NO) terminals of theswitch. The meter should indicate a open circuit inthe door open condition. When the door is closed,meter should indicate an closed circuit. When thesecondary switch operation is abnormal, make thenecessary adjustment or replace the switch onlywith the same type of switch.

C. MONITOR SWITCH TESTDisconnect the wire lead from the monitor switch.Connect the ohmmeter leads to the common(COM) and normally closed (NC) terminals of theswitch. The meter should indicate closed circuit inthe door open condition. When the door is closed,meter should indicate an open circuit. When themonitor switch operation is abnormal, replace withthe same type of switch.NOTE: After repairing the door or the interlocksystem, it is necessary to do this continuitytest before operating the oven.

5-7

WARNING : FOR CONTINUED PROTECTION AGAINST EXCESSIVE RADIATION EMISSION, REPLACE ONLY WITH IDENTICAL REPLACEMENT PARTS.

COMPONENTS TEST PROCEDURE RESULTS

SWITCHES Check for continuity of the Door Door(Wire leads removed) switch with an Ohm-meter open closed

PrimarySwitch

MonitorSwitch

NOTE : After checking for the continuity of switches, make sure that arecorrectly connected.

COMNO

COM

NC

COMNO

INTERLOCK CONTINUITY TEST

SecondarySwitch

TYPE NO. KW3A FOR SWITCHS

Type No.KW3A

Type No.KW3A

Type No.KW3A

5-8

CAUTIONS1. DISCONNECT THE POWER SUPPLY CORD FROM THE OUTLET WHENEVER REMOVING THE

OUTER CASE FROM THE UNIT. PROCEED WITH THE TEST ONLY AFTER DISCHARGING THE HIGHVOLTAGE CAPACITOR AND REMOVING THE WIRE LEADS FROM THE PRIMARY WINDING OF THEHIGH VOLTAGE TRANSFORMER. (SEE PAGE 2-1)

2. ALL OPERATIONAL CHECKS WITH MICROWAVE ENERGY MUST BE DONE WITH A LOAD (1 LITEROF WATER IN CONTAINER) IN THE OVEN.

COMPONENTS TEST PROCEDURE RESULTSHIGH VOLTAGETRANSFORMER(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)• Filament to chassis

Approx.: 1.4 ohmApprox.: 90 ohmLess than: 1 ohm

Normal: InfiniteNormal: Infinite

Normal: Less than 1 ohm

Normal: Infinite

COMPONENT TEST PROCEDURE

PRIMARY TERMINAL

SECONDARY WINDING

FILAMENT WINDINGTERMINAL

5-9

COMPONENTS TEST PROCEDURE RESULTS

HIGH VOLTAGECAPACITOR

HIGH VOLTAGEDIODE

Measure the resistance.(Ohm-meter scale: Rx1000)• Terminal to terminal.

Measure the resistance.(Ohm-meter scale: Rx1000)• Terminal to case.

Measure the continuity (Forward).(Ohm-meter scale: Rx10000)

Measure the continuity (Reverse).(Ohm-meter scale: Rx10000)

Normal: Momentarily indicatesseveral ohms, and thengradually returns to

Normal: ∞

Normal: ∞Abnormal: Continuity.

NOTE: When testing the magnetron, be sure to install the magnetron gasketin the correct position and be sure that the gasket is in good condition.

Antenna

Gasket

Chassis

Filament

10M ohms.

NOTE :Some inexpensive metersmay indicate infiniteresistance in both direction.

*

Normal: Continuity.Abnormal: ∞ *

5-10

COMPONENTS TEST PROCEDURE RESULTS

1 3 5

Relay 2

Relay 1

FUSE

THERMALCUT-OUT

RELAY 2 OF P.C.B.(Wire leads removed.)Note: RelayRelay 1: Fan motor

Turntable motorOven lamp

Relay 2: Microwave

Check for continuity of the fuse with anmulti-meter.

NOTE: If the fuse is blown, check the primary, the secondary, and the monitor switches,H.V.D. and H.V.C. before replacing the fuse.If the fuse is blown by improper switch operation replace the defective switch and thefuse at the same time. Replace just the fuse if the switches operate normally.

Check for P.C.B. connector.

Normal Abnormal

Cooking Start OFF

Below specifiedtemperature

specifiedtemperature

Above

L.V.Transformer of P.C.BDisconnect the 3 pinconnector from P.C.B.

*Normal Abnormal

(Refer to schemetic diagram)

5-11

COMPONENTS TEST PROCEDURE RESULTS

FAN MOTOR(Wire leads removed)

TURNTABLEMOTOR(Wire leads removed)

Measure the resistance.(Ohm-meter scale: R x 100)

Measure the resistance.(Ohm-meter scale: R x 1000)

Normal:Abnormal: ∞ or several Ω

Normal: Approx. 100~200KAbnormal: ∞ or several Ω

NOTE : • A MICROWAVE LEAKAGE TEST MUST ALWAYS BE PERFORMED WHEN THE UNIT ISSERVICED 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.

00~5001

Ω

Ω

5-12

TROUBLE SHOOTING

WHEN YOU GET A COMPLAINT FROM YOUR CUSTOMER, EVALUATE THE COMPLAINT CAREFULLY. IFTHE FOLLOWING SYMPTOMS APPLY, PLEASE INSTRUCT THE CUSTOMER IN THE PROPER USE OF THEMICROWAVE OVEN. THIS CAN ELIMINATE AN UNNECESSARY SERVICE CALL.

CAUTIONS1. Check grounding before checking for trouble.2. Be careful of the high voltage circuit.3. Discharge the high voltage capacitor. (See page 2-1)4. When checking the continuity of the switches or of the high voltage transformer, disconnect one lead wire

from these parts and then check continuity with the AC plug removed. To do otherwise may result in afalse reading or damage to your meter.

5. Do not touch any part of the circuitry on the digital programmer circuit since static electric discharge maydamage this control panel.

Always touch yourself ground while working on this panel to discharge any static charge built up in yourbody.

CONDITION

Microwave oven does not work.

Inserting many plug into oneplug outlet and using them at the same time (causes overloading).

Microwave oven plug is notinserted tightly.

Output power is too low. Low AC input voltage.

Food temperature is too low.

Using metallic ware andallowing it to touch the ovenwall.

Sparks occurring.

Inconsistent intensity ofmicrowave by theircharacteristics.

1. Wrap the thinner part withaluminum foil.

2. Use plastic wrap or lid.3. Stir once or twice while cooking

soup, cocoa or milk, etc.

Uneven cooking.

Ceramic ware trimmed ingold or silver powder is used.

Avoid using other electricalappliances when you use themicrowave oven.

Insert microwave oven plugsecurely.

Use the microwave oven atadequate line voltage.

This may not be a defect.It is possible that the foodshould be cooked for alonger time period.

Do not use metallic ware forcooking except where notedin the cooking guide.

Do not use any type ofcookware with metallictrimming.

CAUSE REMEDY

Excessive weight on tray orimproperly balanced.

Distribute food evenly. Cooksmaller portions and,or use lighter weight cookware.

Turntable drags or makesnoise.

1. Incomplete segments.• Segment missing.• Partial segment missing.• Digit flickering (NOTE: Slight flickering is normal.)

2. Colon does not turn on or blink.3. A distinct change in the brightness of one or more numbers in display.4. One or more digits in the display are not lighting.5. Display indicates a number different from one touched, for example, key in 5 and 3 appears in the display.6. Specific numbers (for example 7 or 9) will not display when key pad is touched.7. Display does not count down with time blinking or up with clock operation.8. Display obviously jumps in time while counting down.9. Display counts down too fast while cooking.

10. Each indicator light does not turn on after setting cooking cycle.11. Display time of day does not reappear when cooking is finished.12. Beep sound is not heard when correct key is touched.

5-13

(TROUBLE 1) The following visual conditions indicate a probable defective control circuit.

CONDITION CHECK RESULT CAUSE REMEDY

1. No input can beprogrammed.

Continuity.

No continuity.

Everything worksas specified.

Still havetrouble. Defective PCB

assembly.Replace PCBassembly.

Defective PCBassembly.

Looseconnection.

Defective keymembraneassembly.

Replace PCBassembly.

Connect themtightly.

Replace keymembraneassembly.

Check the conn-ection betweenmembrane keyassembly andPCB assembly.

2. Some inputscannot beprogrammed.

Replace keymembraneassembly andcheck operation.

3. Display shows anumber or figuredifferent from onetouched.

4. Randomprogrammingwhen touchingother pads.

5. Display is fixedat some figureand can notaccept anyinput.

5-14

CONDITION CHECK RESULT CAUSE REMEDY

1. Fuse blows. Continuity.

No continuity.

Continuity. Shorted contact atthe primary switch.

Replace primaryand monitorswitches.

No continuity.

Normal.Defective highvoltage capacitor.

Replace highvoltage capacitor.

Fuse blows againDefective high volt-age transformer.

Replace high volt-age transformer.

Malfunction of themonitor switch.

Replace primaryand monitorswitches.

Check continuityof monitorswitch (withdoor closed).

Check continuityof primaryswitch (withdoor opened).

Disconnect oneside of the wirelead connectedfrom transformerto the highvoltagecapacitor andoperate the unit.

Replace fuse

(TROUBLE 2) Oven does not operate at all ; Display window does not display any figures andno input is accepted.

NOTE : All these switches must be replaced at the same time. Refer to page 5-6, 5-7

5-15

(TROUBLE 3) Display shows all figures set, but oven does not start cooking whiledesired program times are set and START pad is touched.

(TROUBLE 4) Oven seems to be operation but output power is low.

CONDITION CHECK RESULT CAUSE REMEDY

1.Setting time doesnot count downwhen touchingSTART pad.

2. Fan motor oroven lampdo not turnon.

No continuity.

continuity.

No continuity.

Continuity.

Check the con-nection betweenconnector andP.C.B assembly.

Defectivesecondary switch.

Replacesecondary switch.

Defective P.C.Bassembly.

Replace P.C.Bassembly.

Check continuityof secondaryswitch (withdoor closed).

Check fan motor.

Check oven lamp.

Abnormal.

Abnormal.

Normal.

Defective fanmotor.

Defective ovenlamp.

Replace fanmotor.

Replace ovenlamp.

Loose connection.Connection thentightly.

CONDITION CHECK RESULT CAUSE REMEDY

Output is low.Lower than 90% ofrating voltage.

Normal.

Normal.

Abnormal.

Abnormal.Measure theoutput power.

Disconnect thewire leads fromrelay 2 and checkon and off timewith multitester.

Defective P.C.Bassembly.

Replace P.C.Bassembly.

Decrease in powersource voltagewith load.

Suggest customercontact localelectric powerutility co. orqualifiedelectrician.

Check thepower sourcevoltage.

Defectivemagnetron.

Replacemagnetron.

NOTE: Refer to Page 5-3 for measuring of microwave power output.

5-16

CONDITION CHECK RESULT CAUSE REMEDY

No microwaveoscillation.

No continuity.

Continuity.

Defective P.C.Bassembly

Replace P.C.Bassembly

Disconnect thewire leads fromrelay 2 andcheck continuityof relay2.(Operate theunit)

Abnormal

normal

Defective highvoltagetransformer.

Replace highvoltagetransformer .

Check H.V.transformer.

normal

normal

AbnormalDefective highvoltage Diode.

Replace highvoltage Diode.

Check H.V.diode.

AbnormalDefective highvoltage capacitor.

Replace highvoltage capacitor.

Check H.V.capacitor.

AbnormalDefectivemagnetron.

Replacemagnetron .

CheckMagnetron.

normal

AbnormalDefective ReplaceCheck

(TROUBLE 5) No microwave oscillation even though oven lamp and fan motor run(Display operates properly)

High voltage Diode. High voltage Diode. High voltage Diode.

5-17

(TROUBLE 6) Oven does not cook properly when programmed for the set power level (Operates properly on HIGH)

CONDITION CHECK RESULT CAUSE REMEDY

Output is full whenyou set lowerpower level.

Abnormal.Disconnect thewire leads fromrelay 2 and checkcontinuity relay 2.(Operate the unit)

Defective P.C.B.assembly.

Replace P.C.B.assembly.

6-1

EXPLODED VIEW

INTRODUCTION

OVEN CAVITY PARTS

INTERIOR PARTS

BASE PLATE PARTS

LATCH BOARD PARTS

CONTROL PANEL PARTS

DOOR PARTS

6-2

DOOR PARTS

D04 05

S03

D06

01

05

08

D03

D

1

2

3

45

6

78

6-3

CONTROL PANEL PARTS

C05

C18

S03

C01

C55

C

11

15

12

9 10

6-4

OVEN CAVITY PARTS

21

2524

27

26

19

22

64

6-5

LATCH BOARD PARTS

2829

29

3032

INTERIOR PARTS

6-6

34

3738

39

40

41

42

43

4445

48

6-7

BASE PLATE PARTS

49

50

51

52

54

55

63

58

58

58

58

7-1

REPLACEMENT PARTS LISTNOTE:

1. When ordering replacement part(s), please use part number(s) shown in this part list.Do not use description of the part.

2. Important safety notice:Components identified by mark have special characteristics important for safety.When replacing any of these components, use only manufacture’s specified parts.

For Model:NN-ST3 4 2M(RPM)

Ref.No. Pan Part No. Part Name&Description Pcs/Set Remarks

1+2 A302A41V0MZP Door AU(DoorA+ScreenB)/Silver 1 ScreenB/Silver

3+5 ！

4 A317641V0ZP TOP DOOR HINGE 1

5 ！

6 ！

7 A323041V0ZP DOOR KEY SPRING 17

8 A301841V0ZP DOOR KEY A 1

9+10 A630Y41T0MRM MEMBRANE SWITCH(U) 1

9 A833741T0MRM ESCUTCHEON SHEET 1

10 A647941V0ZP MEMBRANE SWITCH 1

11 ！11 ！

12 A603L41T0ZP PC BOARD(U) 1

15 A812741V0ZP ESCUT.BACK PLATE 1

19 A060141V0ZP COOKING TRAY 1

21 A205541V0ZP CEILING COVER 1

22 A290D41V0ZP ROLLER RING(U) 1

24+64 A110D41V0MZP CABINET BODY(U) 1

25 A488540N0BP BRACKET WATER SEALING 1

26 A213140N0BP PULLEY SHAFT 1

A803441V0MZP ESCUTCHEON BASE 1

A308541V0ZP DOOR C 1

A314541V0ZP DOOR SCREEN A 1

A302K41V0ZP DOOR E UNIT 1

REPLACEMENT PARTS LIST

7-2

For Model:NN-ST3 4 2M(RPM)

27 A632641V0ZP TURNTABLE MOTOR 1

28 ！

29 ！

30 ！MICROSWITCH(MONITORSWITCH) 1

32 A313641V0ZP HOOK SPACER 1

34 ！ 120/034 ！ 120/0

37 A402541V0ZP AIR GUIDE A 1

38 A612E7W50BP LAMP(U) 1

39 ！

40 A030A41T0ZP LEAD WIRE HARNESS 1

41 ！

42 ！

43 A400A41V0ZP FAN MOTOR 1

44 A414441V0ZP ORIFICE 1

45 FAN BLADE 145 FAN BLADE 1

48 ！ 2M219J MAGNETRON 1

49 A300741V0ZP LOWER HINGE 1

50 ！

51 A618841V0ZP CAPACITOR BRACKET 1

5252 ！

54 ！

55 A100141V0ZP BASE 1

58 A100841V0ZP RUBBER FOOT 4

63 A09047W50BP CUSHION RUBBER 1 Baseplate

A620241V0ZP DIODE,SI 1

A60907W50BP H.V. CAPACITOR 1

A600B41V0ZP H.V.TRANSFORMER 1

A400841V0ZP

A692Y41V0ZP NOISE FILTER 1

A623040N0BP FUSE 1

A900C41T0ZP AC CORD W/PLUG 1

A614541T0ZP THERMAL CUTOUT(OVEN) 1

A614241V0ZP

A614141V0ZP MICROSWITCH 2

A302041V0ZP DOOR HOOK A 1

7-3

REPLACEMENT PARTS LISTNOTE:

1. When ordering replacement part(s), please use part number(s) shown in this part list.Do not use description of the part.

2. Important safety notice:Components identified by mark have special characteristics important for safety.When replacing any of these components, use only manufacture’s specified parts.

For Model:NN-ST3 4 2M(RPH )

Ref.No. Pan Part No. Part Name&Description Pcs/Set Remarks

1+2 A302A41V0MZP Door AU(DoorA+ScreenB)/Silver 1 ScreenB/Silver

3+5 ！

4 A317641V0ZP TOP DOOR HINGE 1

5 ！ 314541V0ZP DOOR SCREEN A 1

6 ！

7 A323041V0ZP DOOR KEY SPRING 1

8 A301841V0ZP DOOR KEY A 1

9+10 A630Y41T0MRP MEMBRANE SWITCH(U) 1

9 A833741T0MRP ESCUTCHEON SHEET 1

10 A647941V0ZP MEMBRANE SWITCH 1

11 ！

12 A603L41T0ZP PC BOARD(U) 1

15 A812741V0ZP ESCUT.BACK PLATE 1

19 A060141V0ZP COOKING TRAY 1

21 A205541V0ZP CEILING COVER 1

22 A290D41V0ZP ROLLER RING(U) 1

24+64 A110D41V0MZP CABINET BODY(U) 1

25 A488540N0BP BRACKET WATER SEALING 1

26 A213140N0BP PULLEY SHAFT 1

A803441V0MZP ESCUTCHEON BASE 1

A308541V0ZP DOOR C 1

A

A302K41V0ZP DOOR E UNIT 1

REPLACEMENT PARTS LIST

7-4

For Model:NN-ST3 4 2M(RPH )

27 632641T0RP TURNTABLE MOTOR 1

28 ！

29 ！

30 ！MICROSWITCH(MONITORSWITCH) 1

32 A313641V0ZP HOOK SPACER 1

34 ！ 120/0

37 A402541V0ZP AIR GUIDE A 1

38 A612E41T0RP LAMP(U) 1

39 ！

40 A030A41T0ZP LEAD WIRE HARNESS 1

41 ！

42 ！

43 A400A41T0RP FAN MOTOR 1

44 ORIFICE 144 ORIFICE 1

45 A400841V0ZP FAN BLADE 1

48 ！ 2M219J MAGNETRON 1

49 A300741V0ZP LOWER HINGE 1

50 ！

51 A618841V0ZP CAPACITOR BRACKET 1

52 ！

54 ！

55 A100141V0ZP BASE 1

58 A100841V0ZP RUBBER FOOT 4

63 A09047W50BP CUSHION RUBBER 1 Baseplate

A620241V0ZP DIODE,SI 1

A609041T0RP H.V. CAPACITOR 1

A600B41T0RP H.V.TRANSFORMER 1

A414441V0ZP

A692Y41T0RP NOISE FILTER 1

A623041T0RP FUSE 1

A900C41T0RP AC CORD W/PLUG 1

A614541T0ZP THERMAL CUTOUT(OVEN) 1

A614241V0ZP

A614141V0ZP MICROSWITCH 2

A302041V0ZP DOOR HOOK A 1

A

8-1

SCHEMATIC DIAGRAM OF P.C.B

12

34

56

78

A B C D

87

65

43

21

DCBA

D11

4148

R3410K

R26

1K

C1315P

C1215P

R332K

C15

0.1uF

VCC

R14220

R15220

R16220

R17220

R18220

R19220

R20220

R21220

R132K

R122K

R112K

R102K

R92K

R82K

D104148

D124148

N

MO

TOR

D144148

+12

R42

4.7K

R24

3K3

R25

3K3

VCC

DO

OR

BUZZER

MICRO

GRILL

key in 0(键入

0)

key in 2( 键入

2)key in 1( 键

入1)

key in 3( 键入

3)key in 4(键

入4)

key in 5(键入

5)

SDA

/KSCA

N0

KSCA

N1

KSCA

N2

DO

OR

LAM

P/FAN

MICRO

KSCA

N3

PE1/CMPN

3

PE0/CMPO

4

PC2/T05

PC3/RESER6

GN

D7

PA0/LED

-C8

PA1/LED

-C9

PA2/LED

-C10

PA3/LED

-C11

PD0/LED

-C12

PD1/LED

-C13

PH0/LED

-D14

PE3/CMP2

1

PE2/CMP1

2

LED-D

/PH1

15

LED-D

/PD2

16

LED-D

/PD3

17

LED-D

/PB018

LED-D

/PB119

LED-D

/PB220

LED-D

/PB321

VD

D22

OSCI/PC0

23

OSCO

/PC124

TON

E/PF025

T2/PF126

PF227

PF328

SINO SH69P26

IC1

SH69P26-28PIN

RESET

ZERO

C7471

C8471

C9471

C10

471

C11

471

C6471

BUZ1R34.7K

+12R13.3k

BUZZER

R22K

R274K

7

R284K

7

R294K

7

R304K

7

R314K

7

1 2 3 4 5 6 7 8 9 10

CN2

CON

10

B

CE

Q1

S8050

1

2

GND

DO

OR

CN2

EC

B

Q6

S8550

B

CE

Q2

S8050

B

CE

Q3

S8050

12

34

RLY1

GRIIL

12

34

RLY2

MICRO

12

34

RLY3

LAM

P

SWA

SWB

SWC

SWD

SWE

key in 5(键入5)

key in 4(键入4)

key in 3(键入3)

key in 1(键入1)

key in 0(键入0)

key in 2(键入2)

R7100K

R3647k

R352K

VCC

VCC

D1

4148D

24148

D3

1448D

44148

OSC

4MH

z

L N

1 3 5 CN100

VH

5-3

C2 4

C3 3

C1 2

A5

B6

C7

G12

H8

D9

E10

F11 C4 1

LED1

3492AG

C17471

MO

TOR

85-265VA

CRX22R,2W

线绕电

阻

D100

1N4007

D101

1N4007

D103

1N4007

D104

1N4007

E100

4.7uF,400VE101

4.7uF,400V

L1012.2m

H,0.1A

R107

3K9

C100102,1K

V

R102100K

R101100R

D102

1N4007

S1 BP3

FB4

D 5

S7

S8

S2

IC100LN

K364C102

104

1 234

IC101

PC817C

D106

UF4002

R10320R

C101102,1K

V

D107

UF4002

E103470uF,25V

E102470uF,25V

L1004.7uH

,0.3A

R104102

R105330R

Z1001N

5229B,4.3V(2%

)

E104220uF,16V

R1064K

7

RY220K,1W

D105

1N4007

ZERO12

3 4IC102

PC817C

R109

20K

金属氧

化膜电

阻

R110

1KC103102

+12

VCC

2

67 9

4

10

5V 12V

IN

1

8

T100BCK

16-D2128

R111100K

B

CE

Q4

S8050R41

1K

R37

4.7K

R38

10K

R39

220

C1910uF/16V

R40

10K

VCC

C160.1uF

EC

BQ7

S8550