Sharp R-211A Service Manual

Page 1

R-211A

TABLE OF CONTENTS

Page

CAUTION, MICROWAVE RADIATION .............................................................................................................. 1

WARNING............................................................................................................................................................1

PRODUCT SPECIFICATIONS........................................................................................................................... 2

GENERAL INFORMATION ................................................................................................................................. 2

APPEARANCE VIEW......................................................................................................................................... 3

OPERATION SEQUENCE ................................................................................................................................. 4

FUNCTION OF IMPORTANT COMPONENTS ................................................................................................... 5

SERVICING ........................................................................................................................................................ 6

TEST PROCEDURE .......................................................................................................................................... 8

COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE............................................................. 13

MICROWAVE MEASUREMENT ...................................................................................................................... 19

WIRING DIAGRAM .......................................................................................................................................... 20

PICTORIAL DIAGRAM..................................................................................................................................... 21

PARTS LIST...................................................................................................................................................... 22

In interests of user-safety the oven should be restored to its original condition and only parts identical to those specified should be used.

MODEL

R-211A

S5709R211APX/

MICROWAVE OVEN

SHARP CORPORATION

SER VICE MANU AL

OPEN DOOR

COOKING CONTROL

TIMER

15

0.5 kg

30

1 kg



DEFROST (Kg)

Page 2

R-211A

Page 3

R-211A

SER VICE MANUAL

SHARP CORPORATION

OSAKA, JAPAN

MICROWAVE OVEN

R-211A

GENERAL IMPORTANT INFORMATION

This Manual has been prepared to provide Sharp Corp. Service engineers with Operation and Service Information.

It is recommended that service engineers carefully study the entire text of this manual, so they will be qualified to render satisfactory customer service.

CAUTION

MICROWAVE RADIATION

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

Service engineers should not be exposed to the microwave energy which may radiate from the magnetron or other microwave generating devices if it is improperly used or connected. All input and output microwave connections, waveguides, flanges and gaskets must be secured. Never operate the device without a microwave energy absorbing load attached. Never look into an open waveguide or antenna while the device is energized.

WARNING

Never operate the oven until the following points are ensured. (A) The door is tightly closed. (B) The door brackets and hinges are not defective. (C) The door packing is not damaged. (D) The door is not deformed or warped. (E) There is not any other visible damage with the oven.

Servicing and repair work must be carried out only by trained service engineers.

All the parts marked "★" on parts list are used at voltages more than 250V.

Removal of the outer wrap gives access to potential above 250V.

All the parts marked "∆" on parts list may cause undue microwave exposure, by themselves, or when they are damaged, loosened or removed.

TEST PROCEDURE

SERVICING AND TROUBLESHOOTING CHART

FUNCTION OF IMPORTANT COMPONENTS

OPERATING SEQUENCE

APPEARANCE VIEW

WIRING DIAGRAM

PARTS LIST

COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE

MICROWAVE MEASUREMENT

PRODUCT SPECIFICATIONS

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R-211A

PRODUCT DESCRIPTION

SPECIFICATION

ITEM DESCRIPTION

Power Requirements 220 Volts

50 Hertz

Single phase, 3 wire earthed Power Consumption 1.06 KW Power Output 700 watts nominal of RF microwave energy (IEC-705-1988)

Operating fequency 2450 MHz

Case Dimensions Width 450 mm

Height 295 mm including foot

Depth 357 mm Cooking Cavity Dimensions Width 285 mm

Height 178 mm

Depth 316 mm Turntable diameter 272mm Control Complement 30 min. Single Speed Timer.

Microwave Power for Variable Cooking

Repetition Rate;

HIGH .................................. Full power throughout the cooking time

MEDIUM / DEFROST......................... approx. 45% of FULL Power

Set Weight (Approx.) Approx. 14 kg

GENERAL INFORMATION

WARNING

THIS APPLIANCE MUST BE EARTHED

IMPORTANT

THE WIRES IN THIS MAINS LEAD ARE COLOURED IN ACCORDANCE WITH THE FOLLOWING CODE:

GREEN-AND-YELLOW : EARTH BLUE : NEUTRAL BROWN : LIVE

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R-211A

APPEARANCE VIEW

OVEN

6. Coupling

7. Control panel

8. Door lock openings

9. Ventilation openings

1. Power supply cord

2. Oven lamp

3. Door hinges

4. Safety door latches

5. Door

COOKING CONTROL

TIMER

OPEN DOOR

15

0.5 kg

30

1 kg



DEFROST (Kg)

VARIABLE COOKING CONTROL There are power levels. The approximate percentage of microwave power for each  setting is:  HIGH 100% MEDIUM/DEFROST 45%

TIMER (0 - 30 min.) Turn to set cooking time.

DOOR OPEN BUTTON

COOKING CONTROL

TIMER

OPEN DOOR

15

0.5 kg

30

1 kg



DEFROST (Kg)

MEAT DEFROST GUIDE (Inner scale)

CONTROL PANEL

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R-211A

OPERATION SEQUENCE

cycle of a cooking program, the 1st latch switch and 2nd latch switch must open their (COM-NO) contacts first. After that the contacts (COM-NC) of the monitor switch can be closed.

7-2. When the oven door is closed. The contacts (COM-

NC) of the monitor switch must be opened and the contacts (COM-NO) of the 2nd latch switch and the 1st latch switch must be closed.

7-3. When the oven door is opened and the (COM-NO)

contacts of the 1st latch switch and the contacts (COM-NO) of the 2nd latch switch remain closed, the fuse M6.3A will blow, the monitor switch is closed and a short circuit is caused.

HIGH, MEDIUM / DEFROST COOKING

When the microwave oven is preset for variable cooking power, the rated voltage is supplied to the power transformer intermittently within a 30-second time base through the vari switch. The following levels of microwave power are given.

SETTING

HIGH Approx. 100%

Approx. 45%

30 sec. ON

MEDIUM DEFROST

13.5 sec. ON 16.5 sec. OFF

Note: The ON/OFF time ratio does not exactly corre-

spond to the percentage of microwave power, because approx. 2 seconds are needed for heating up the magnetron filament.

OFF CONDITION

1. When the timer knob is at " 0 ", the oven is OFF condition.

2. Closing the oven door activates the 1st latch switch, the 2nd latch switch and monitor switch.

IMPORTANT: When the oven door is closed, the contacts COM-NC of the monitor switch must be open.

Figure O-1 on page 20

MICROWAVE COOKING CONDITION

HIGH COOKING

Set the variable cooking control to HIGH and then set the timer.

Function sequence

Figure O-2 on page 20

1. Following components are energized.

Power transformer H.V. capacitor Timer motor Magnetron H.V. rectifier Fan motor

Turntable motor Oven lamp

2. Rated voltage is supplied to the primary winding of the power transformer. The voltage is converted to about

3.3 volts A.C. output on the filament winding and high voltage of approximately 2000 volts A.C. on the secondary winding.

3. The filament winding voltage (3.3 volts) heats the magnetron filament and the high voltage (2000 volts) is sent to the voltagedoubling circuit, where it is doubled to negative voltage of approximately 4000 volts D.C..

4. The 2450 MHz microwave energy produced in the magnetron generates a wave length of 12.24 cm. This energy is channelled through the waveguide (transport channel) into the oven cavity, where the food is placed to be cooked.

5. When the cooking time is up, the timer returns to "0", the bell rings and the contacts of the timer are opened. Then following components are turned off.

Power transformer Magnetron Timer motor Turntable motor H.V. capacitor Fan motor

H.V. rectifier Oven lamp

6. When the oven door is opened during a cooking cycle, the switches come to the following positions and they are common to the other cooking conditions too.

Switch Contact Condition

During Oven Door

Cooking Open(No cooking) 1st latch Switch COM-NO Closed Opened Monitor Switch COM-NC Opened Closed 2nd latch switch COM-NO Closed Opened

The circuit to the power transformer, turntable motor, timer motor, fan motor and oven lamp are cut off when the COM-NO contacts of the 2nd latch switch and 1st latch switch are made open. The timer stops to indicate how much cooking time remains.

7. MONITOR SWITCH CIRCUIT The monitor switch is mechanically controlled by the oven door, and monitors the operation of the 1st latch switch and 2nd latch switch.

7-1. When the oven door is opened during or after the

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R-211A

FUNCTION OF IMPORTANT COMPONENTS

DOOR OPEN MECHANISM

The door is opened by pushing the open button on the control panel, refer to the Figure D-1. When the open button is pushed, the open button pushes the switch lever up and in turn the latch heads are released from latch hook. When the latch heads are released, the switch lever returns to its original position by its own weight.

LATCH HOOK

LATCH HEADS

DOOR

MONITOR SWITCH

1 ST. LATCH SWITCH

SWITCH LEVER

2ND. LATCH SWITCH

Figure D-1. Door Open Mechanism

1ST. LATCH SWITCH AND 2ND. LATCH SWITCH

1. When the oven door is closed, the contacts (COM-NO) must be closed.

2. When the oven door is opened, the contacts (COMNO) must be opened.

MONITOR SWITCH

1. When the oven door is closed, the contacts (COM-NC) must be opened.

2. When the oven door is opened, the contacts (COMNC) must be closed.

3. If the oven door is opened and the contacts (COM-NO) of the 1st latch switch and 2nd latch switch fail to open, the fuse blows simultaneously with closing the contacts (COM-NC) of the monitor switch.

CAUTION: BEFORE REPLACING A FUSE F TEST

THE 1ST LATCH SWITCH SW1, 2ND LATCH SWITCH, MONITOR SWITCH AND MONITOR RESISTOR R FOR PROPER OPERATION. (REFER TO CHAPTER "TEST PROCEDURE".)

MONITOR RESISTOR 0.8Ω 20W The monitor resistor prevents the fuse F bursting when

the fuse blows due to the operation of the monitor switch.

FUSE

1. The fuse blows when the contacts (COM-NO) of the 1st latch switch and 2nd latch switch remain closed with the oven door open and when the monitor switch closes.

2. If the wire harness or electrical components are shortcircuited, the fuse blows to prevent an electric shock of fire hazard.

TEMPEATURE FUSE 120˚C (OVEN)

The temp. fuse located on the top of the oven cavity is designed to prevent damage to the oven if the foods in the oven catch fire due to over heating produced by improper setting of cook time or failure of control unit. Under normal operation, the temp. fuse remains closed. However, when abnormally high temperatures are reached within the oven cavity, the temp. fuse will open at 120˚C, causing the oven to shut down. The defective fuse must be replaced with a new one.

THERMAL CUT-OUT 95˚C (MAGNETRON )

The thermal cut-out located on the top of the oven cavity is designed to prevent damage to the magnetron if an over heated condition develops in the tube due to cooling fan failure, obstructed air guide, dirty or blocked air intake, etc. Under normal operation, the thermal cut-out remains closed. However, when abnormally high temperatures are reached within the magnetron, the thermal cut-out will open at 95˚C, causing the oven to shut down. When the magnetron has cooled to 75˚, the thermal cut-out closes and cook cycle will resume.

TURNTABLE MOTOR

The turntable motor drives the roller stay to rotate the turntable.

FAN MOTOR

The fan motor drives a blade which draws external cool air. This cool air is directed through the air vanes surrounding the magnetron and cools the magnetron. This air is channelled through the oven cavity to remove steam and vapours given off from the heating foods. It is then exhausted through the exhausting air vents at the oven cavity.

TIMER MOTOR (WITH VARI-SWITCH)

Timer switch

1. When the timer is at "0" position, the switch of the timer are opened.

2. When the timer is turned clockwise from "0" position, the switch of the timer are closed.

Vari-switch

If the variable cooking control is set at HIGH or MEDIUM DEFROST, cooking position, Rated voltage is supplied to the power transformer intermittently within a 30 seconds time base. The following chart shows the vari-switch operation in the various modes. are given.

SETTING

HIGH Approx. 100%

Approx. 45%

30 sec. ON

MEDIUM DEFROST

13.5 sec. ON 16.5 sec. OFF

Note: The ON/OFF time ratio does not exactly corre-

spond to the percentage of microwave power, because approx. 2 seconds are needed for heating up the magnetron filament.

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R-211A

SERVICING

REMEMBER TO CHECK 4R

1) Reconnect all leads removed from components during testing.

2) Replace the outer case (cabinet).

3) Reconnect the supply.

4) Run the oven. Check all functions.

Microwave ovens should not be run empty. To test for the presence of microwave energy within a cavity, place a cup of cold water on the oven turntable, close the door and set the power level to HIGH. And set the microwave timer for two (2) minutes. When the two minutes has elapsed (timer at zero) carefully check that the water is now hot. If the water remains cold carry out 3D checks and re-examine the connections to the component being tested.

REMEMBER TO CHECK 3D

1) Disconnect the supply.

2) Door opened, and wedged open.

3) Discharge high voltage capacitor. WARNING AGAINST THE CHARGE OF THE

HIGH-VOLTAGE CAPACITOR

The high-voltage capacitor remains charged about 60 seconds after the oven has been switched off. Wait for 60 seconds and then shortcircuit the connection of the high-voltage capacitor (that is, of the connecting lead of the highvoltage rectifier) against the chassis with the use of an insulated screwdriver.

Sharp recommend that wherever possible fault-finding is carried out with the supply disconnected. It may in, some cases, be necessary to connect the supply after the outer case has been removed, in this event carry out 3D checks and then disconnect the leads to the primary of the power transformer. Ensure that these leads remain isolated from other components and the oven chassis. (Use insulation tape if necessary.) When the testing is completed carry out 3D checks and reconnect the leads to the primary of the power transformer.

When all service work is completed, and the oven is fully assembled, the microwave power output should be checked and microwave leakage test carried out.

When troubleshooting the microwave oven, it is helpful to follow the Sequence of Operation in performing the checks. Many of the possible causes of trouble will require that a specific test be performed. These tests are given a procedure letter which will be found in the "Test Procedure "section.

TROUBLESHOOTING GUIDE

IMPORTANT: If the oven becomes inoperative because

of a blown fuse M6.3A in the 1st. latch switch - 2nd. latch switch - monitor switch

- monitor resistor circuit, check the 1st. latch switch, 2nd. latch switch, monitor switch and monitor resistor before replacing the fuse M6.3A.

WARNING TO SERVICE PERSONNEL

Microwave ovens contain circuitry capable of producing very high voltage and current. Contact with following parts will result in electrocution. High voltage capacitor, Power transformer, Magnetron, High voltage rectifier assembly, High voltage harness.

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R-211A

TROUBLESHOOTING CHART

PROBLEM

Fuse M6.3A blows when power cord is plugged into wall outlet.

Fuse M6.3A blows when the door is opened.

Home fuse blows when power cord is plugged into wall outlet.

Oven does not operate at all. Oven goes into cook cycle

but shuts down before end of cooking cycle.

Oven lamp does not light. (Fan motor rotates)

Fan motor does not operate, but oven lamp lights.

Timer motor does not operate, but oven lamp lights.

Turntable motor does not operate, but oven lamp lights.

Oven seems to be operating but little or no heat is produced in oven load. (Microwave power control is set at "HIGH" position, and turntable motor operates.)

Oven does not operate properly in another position except "HIGH" position.

POSSIBLE CAUSE

AND

DEFECTIVE PARTS

TEST PROCEDURE

OFF CONDITION

CONDITION

MAGNETRON

POWER TRANSFORMER

H.V. RECTIFIER ASSEMBLY

HIGH VOLTAGE CAPACITOR

1ST. LATCH SWITCH

2ND. LATCH SWITCH

MONITOR SWITCH

TEMPERATURE FUSE 120˚C (OVEN)

THERMAL CUT-OUT 95˚C (MG)

TIMER MOTOR

TIMER CONTACT

TIMER DEFROST SWITCH

FAN MOTOR

TURNTABLE MOTOR

FUSE M6.3A

POWER SUPPLY CORD

SHORTED WIRE HARNESS

OPENED WIRE HARNESS

OVEN LAMP OR SOCKET

BLOCKED VENTILATION OPENING

MISADJUSTMENT SWITCH

HOME FUSE OR BREAKER

WALL OUTLET

BLOCKED COOLING FAN

POWER SELECT SWITCH

ABCDEEEGGJ J JHHI E

COOKING CONDITION

Page 10

R-211A

CARRY OUT 3D CHECKS. Isolate the magnetron from the high voltage circuit by removing all leads connected to the filament

terminal. To test for an open circuit filament use an ohmmeter to make a continuity test between the magnetron

filament terminals, the meter should show a reading of less than 1 ohm. To test for a short circuit filament to anode condition, connect ohmmeter between one of the filament

terminals and the case of the magnetron (ground). This test should be indicated an infinite resistance. If a low or zero resistance reading is obtained then the magnetron should be replaced.

MICROWAVE OUTPUT POWER (IEC705)

The following test procedure should be carried out with the microwave oven in a fully assembled condition (outer case fitted). Microwave output power from the magnetron can be measured by way of IEC 705, i.e. it can be measured by using water load how much it can be absorbed by the water load. To measure the microwave output power in the microwave oven, the relation of calorie and watt is used. When P(W) heating works for t(second), approximately P x t/4.187 calorie is generated. On the other hand, if the temperature of the water with V(ml) rises ∆T (˚C) during this microwave heating period, the calorie of the water is V x ∆T.

Measuring condition:

1. Container The water container must be a cylindrical borosilicate glass vessel having a maximum material thickness of 3 mm and an outside diameter of approximately 190 mm.

2. Temperature of the oven and vessel The oven and the empty vessel are at ambient temperature prior to the start of the test.

3. Temperature of the water The initial temperature of the water is (10±2)˚C.

4. Select the initial and final water temperature so that the maximum difference between the final water temperature and the ambient temperature is 5˚C.

5. Select stirring devices and measuring instruments in order to minimize addition or removal of heat.

6. The graduation of the thermometer must be scaled by 0.1˚C at minimum and an accurate thermometer.

7. The water load must be (1000±5) g.

8. “t” is measured while the microwave generator is operating at full power. Magnetron filament heatup time is not included.

NOTE: The operation time of the microwave oven is “t + 2” sec. 2 sec. is magnetron filament heat-

up time.

Measuring method:

1. Measure the initial temperature of the water before the water is added to the vessel. (Example: The initial temperature T1 = 11˚C)

2. Add the 1 litre water to the vessel.

3. Place the load on the centre of the shelf.

4. Operate the microwave oven at HIGH for the temperature of the water rises by a value ∆ T of (10 ± 2)˚C.

5. Stir the water to equalize temperature throughout the vessel.

6. Measure the final water temperature. (Example: The final temperature T2 = 21°C)

7. Calculate the microwave power output P in watts from above formula.

NEVER TOUCH ANY PART IN THE CIRCUIT WITH YOUR HAND OR AN INSULATED TOOL WHILE THE OVEN IS IN OPERATION.

The formula is as follows;

P x t / 4.187 = V x ∆ T P (W) = 4.187 x V x ∆T / t

Our condition for water load is as follows:

Room temperature..............around 20˚C Power supply Voltage.........Rated voltage

Water load.........1000 g Initial temperature...........10±2°C Heating time.........60 sec.

P = 70 x ∆ T

TEST PROCEDURES

PROCEDURE

LETTER

COMPONENT TEST

A MAGNETRON TEST

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R-211A

1000g

T1˚C

T2˚C

Heat up for 62 sec.

B POWER TRANSFORMER TEST

CARRY OUT 3D CHECKS. Disconnect the leads to the primary winding of the power transformer. Disconnect the filament and secondary winding connections from the rest of the HV circuitry. Using an ohmmeter, set on a low range, it is possible to check the continuity of all three windings. The following readings should be obtained:

WARNING: High voltages and large currents are present at the secondary winding and

filament winding of the power transformer. It is very dangerous to work near this part when the oven is on. NEVER make any voltage measurements of the highvoltage circuits, including the magnetron filament.

If the reading obtained are not stated as above, then the power transformer is probably faulty and should be replaced. CARRY OUT 4R CHECKS.

Initial temperature.................................................................................................. T1 = 11°C

Temperature after (60 + 2) = 62 sec...................................................................... T2 = 21°C

Temperature difference Cold-Warm .................................................................... ∆T1 = 10°C

Measured output power

The equation is “P = 70 x ∆T”.......................................................P = 70 x 10°C = 700 Watts

JUDGMENT: The measured output power should be at least ± 15 % of the rated output power.

CAUTION: 1°C CORRESPONDS TO 70 WATTS. REPEAT MEASUREMENT IF THE POWER IS

INSUFFICIENT.

a.Primary winding................ 1.9 ohms approximately

b.Secondary winding ...........162 ohms approximately

c.Filament winding ..............less than 1 ohm

C HIGH VOLTAGE RECTIFIER ASSEMBLY TEST

TEST PROCEDURES

PROCEDURE

LETTER

COMPONENT TEST

HIGH VOLTAGE RECTIFIER TEST CARRY OUT 3D CHECKS.

Isolate the high voltage rectifier assembly from the HV circuit. The high voltage rectifier can be tested using an ohmmeter set to its highest range. Connect the ohmmeter across the terminal B+C of the high voltage rectifier and note the reading obtained. Reverse the meter leads and note this second reading. The normal resistance is infinite in one direction and more than 100 kΩ in the other direction.

CARRY OUT 4R CHECKS.

NOTE: FOR MEASUREMENT OF THE RESISTANCE OF THE RECTIFIER, THE BATTERIES OF

THE MEASURING INSTRUMENT MUST HAVE A VOLTAGE AT LEAST 6 VOLTS, BECAUSE OTHERWISE AN INFINITE RESISTANCE MIGHT BE SHOWN IN BOTH DIRECTIONS.

HIGH VOLTAGE RECTIFIER

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R-211A

TEST PROCEDURES

PROCEDURE

LETTER

COMPONENT TEST

E SWITCH TEST

D HIGH VOLTAGE CAPACITOR TEST

CARRY OUT 3D CHECKS. A. Isolate the high voltage capacitor from the circuit.

B. Continuity check must be carried out with measuring instrument which is set to the highest

resistance range.

C. A normal capacitor shows continuity for a short time (kick) and then a resistance of about 10MΩ

after it has been charged.

D. A short-circuited capacitor shows continuity all the time. E. An open capacitor constantly shows a resistance about 10 MΩ because of its internal 10MΩ

resistance.

F. When the internal wire is opened in the high voltage capacitor shows an infinite resistance. G. The resistance across all the terminals and the chassis must be infinite when the capacitor is

normal.

If incorrect reading are obtained, the high voltage capacitor must be replaced. CARRY OUT 4R CHECKS.

Isolate the switch to be tested and using an ohmmeter check between the terminals as described in the following table.

CARRY OUT 3D CHECKS.

Table: Terminal Connection of Switch

Plunger Operation COM to NO COM to NC

Released Open circuit Short circuit Depressed Short circuit Open circuit

If incorrect readings are obtained, make the necessary switch adjustment or replace the switch. CARRY OUT 4R CHECKS.

F MONITOR RESISTOR TEST

CARRY OUT 3D CHECKS. Disconnect the leads from the monitor resist. Using an ohmmeter and set on a low range. Check between the terminals of the monitor resistor.

The resistance of monitor resistor is approx. 0.8 ohms.

If incorrect readings are obtained, replace the monitor resistor. CARRY OUT 4R CHECKS.

G TEMPERATURE FUSE OR THERMAL CUT-OUT TEST

CARRY OUT 3D CHECKS. Disconnect the leads from the terminals of the thermal cut-out. Then using an ohmmeter, make a continuity test across the two terminals as described in the below.

CARRY OUT 4R CHECKS.

Table: Temperature Fuse or Thermal Cut-out Test

Temperature of Temperature of Indication of

"ON" condition "OFF" condition ohmmeter

Parts Name (closed circuit). (open circuit). (When room

(˚C) (˚C) temperature is

approx. 20˚C.)

Temp. fuse 120˚C This is not resetable Above 120˚C Closed circuit

type.

Thermal cut-out

Below 75˚C Above 95˚C Closed circuit.

COM; Common terminal, NO; Normally open terminal NC; Normally close terminal

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R-211A

TEST PROCEDURES

PROCEDURE

LETTER

COMPONENT TEST

I FUSE M6.3A

CARRY OUT 3D CHECKS. If the fuse M6.3A is blown when the door is opened, check the 1st latch switch, 2nd latch switch, monitor

switch and monitor resistor. If the fuse M6.3A is blown by incorrect door switching replace the defective switch(es) and the fuse M6.3A. If the fuse M6.3A is blown, there is a shorts or grounds in electrical parts or wire harness.

Check them and replace the defective parts or repair the wire harness. CARRY OUT

4R CHECKS.

CAUTION: Only replace fuse with the correct value replacement.

If incorrect readings are obtained, replace the temperature fuse or thermal cut-out. An open circuit thermal cut-out (MG) indicates that the magnetron has overheated, this may be due

to resistricted ventilation, cooling fan failure or a fault condition within the magnetron or HV circuit. An open circuit temperature fuse (OVEN) indicates that the food in the oven cavity may catch fire, this

may be due to overheating produced by improper setting of the cooking time or failure of the control panel.

H MOTOR WINDING TEST

CARRY OUT 3D CHECKS. Disconnect the leads from the motor. Using an ohmmeter, check the resistance between the two

terminals as described in the table below.

Table: Resistance of Motor

Motors Resistance Fan motor Approximately 330 ohms Turntable motor Approximately 12 kohms

If incorrect readings are obtained, replace the motor. CARRY OUT 4R CHECKS.

J TIMER MOTOR (WITH DEFROST-SWITCH) TEST

CARRY OUT 3D CHECKS before any of the following timer tests.

TIMER SWITCH- CONTACTS

Disconnect the leads from terminals described at following table. Connect an ohmmeter across terminals described at following table. Advance the timer and check that a short circuit reading is obtained on the meter. Turn the timer back to the zero (0) position and check that an open circuit reading is obtained on the meter. If these readings are not obtained then replace the timer.

Disconnecting and checking terminals 1 and 4

TIMER - MOTOR

Disconnect the leads from terminals described at following table. Connect an ohmmeter across the timer motor winding, terminals are described at following table, and check that a reading of resistance described at following table is indicated. If this reading is not obtained then the timer is probably defective and should be replaced.

Disconnecting and checking terminals 1 and 2 Resistance of motor winding approximately 22.8 kohms

CARRY OUT 4R CHECKS after any of the above tests.

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R-211A

TEST PROCEDURES

PROCEDURE

LETTER

COMPONENT TEST

ON: Meter indicates closed. OFF: Meter indicates open. Check results: If any of the condition as described in the table are not obtained, then the timer should

be replaced.

CARRY OUT 4R CHECKS.

DEFROST SWITCH - CONTACTS

Before proceeding with this part of the test, check the relay coil as outlined above.

WARNING:This test requires the oven to be operated with supply connected.

Follow the instruction below carefully.

1. CARRY OUT 3D CHECKS.

2. Disconnect the leads to the primary of the power transformer. Make sure that the leads remain isolated from other oven components and chassis.

3. Disconnect the leads from terminals 1 and 3 of the timer, make sure that these leads remain isolated from other components and the oven chassis (use insulation tape if necessary). Do not disconnect leads from terminals 1 and 2.

4. Securely clip the leads of an ohmmeter across terminals 1 and 3 of the timer. (Make sure the meter can be read easily without being touched during the test.)

5. Close the door of the oven.

6. Connect the supply.

7. Set the TIMER to several minutes.

8. Without touching the meter or any part of the oven make a note of the time which the ohmmeter indicates S.C. and O.C. in each power level as described in the table.

9. Set the MICROWAVE TIMER to 0 (zero).

10.CARRY OUT 3D CHECKS.

11.Disconnect meter from terminals 1 and 3 of the timer.

12.Disconnect meter leads and reconnect the leads to the primary of the power transformer.

VARI-MODE ON TIME OFF TIME HIGH (approx. 100% power) 30 sec 0 sec. MEDIUM DEFROST (approx. 45% power) 13.5 sec 16.5 sec.

S.C. = Short circuit O.C. = Open circuit

Timer motor with defrost switch

SW1



(Main Switch)

SW2



(Defrost Switch)

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R-211A

COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE

WARNING: Avoid possible exposure to microwave energy. Please follow the instructions

below before operating the oven.

1. Disconnect oven from power supply.

2. Make sure that a definite” click” can be heard when the microwave oven door is unlatched. (Hold the door in a closed position with one hand, then push the door open button with the other, this causes the latch leads to rise, it is then possible to hear a “click’ as the door switches operate.)

3. Visually check the door and cavity face plate for damage (dents, cracks, signs of arcing etc.).

Carry out any remedial work that is necessary before operating the oven. Do not operate the oven if any of the following conditions exist;

To remove the outer case proceed as follows.

1. Disconnect oven from power supply.

2. Open the oven door and wedge it open.

3. Remove the screws from rear and along the side edge of case.

4. Slide the entire case back about 3cm to free it from retaining clips on the cavity face plate.

5. Lift the entire case from the oven.

1. Door does not close firmly.

2. Door hinge, support or latch hook is damaged.

3. The door gasket or seal or damaged.

4. The door is bent or warped.

5. There are defective parts in the door interlock system.

6. There are defective parts in the microwave generating and transmission assembly.

7. There is visible damage to the oven.

Do not operate the oven:

1. Without the RF gasket (Magnetron).

2. If the wave guide or oven cavity are not intact.

3. If the door is not closed.

4. If the outer case (cabinet) is not fitted.

Please refer to ‘OVEN PARTS, CABINET PARTS, CONTROL PANEL PARTS, DOOR PARTS’, when carrying out any of the following removal procedures:

OUTER CASE REMOVAL

6. Discharge the H.V. capacitor before carrying out any further work.

7. Do not operate the oven with the outer case removed.

N.B.; Step 1, 2 and 6 form the basis of the 3D checks. CAUTION: DISCHARGE HIGH VOLTAGE CAPACITOR

BEFORE TOUCHING ANY OVEN COMPONENT OR WIRING.

HIGH VOLTAGE COMPONENTS REMOVAL

(HIGH VOLTAGE CAPACITOR AND HIGH VOLTAGE RECTIFIER ASSEMBLY)

To remove the components, proceed as follows.

1. CARRY OUT 3D CHECKS.

2. Remove one (1) screw holding capacitor holder to rear cabinet.

3. Disconnect the H.V. wire of the H.V. rectifier assembly from the magnetron.

4. Disconnect the filament lead of the power transformer from the H.V. capacitor.

5. Remove one (1) screw holding earth side terminal of high voltage rectifier assembly, and remove capacitor holder.

6. Disconnect all the leads and terminals of high voltage rectifier assembly from high voltage capacitor.

7. Disconnect the H.V. wire B from the H.V. capacitor.

8. Now H.V. rectifier assembly and H.V. capacitor should be free.

CAUTION: WHEN REPLACING HIGH VOLTAGE REC-

TIFIER ASSEMBLY, ENSURE THAT THE CATHODE (EARTH) CONNECTION IS SECURELY FIXED TO THE CAPACITOR HOLDER WITH AN EARTHING SCREW.

CAUTION: DO NOT REPLACE ONLY HIGH VOLTAGE

RECTIFIER. WHEN REPLACING IT, REPLACE HIGH VOLTAGE RECTIFIER ASSEMBLY.

1. CARRY OUT 3D CHECKS.

2. Disconnect the wire leads (main wire harness and H.V. wire) from power transformer.

3. Disconnect the lead from magnetron filament.

4. Remove one (1) screw holding capacitor holder to rear cabinet.

5. Disconnect the lead of the power transformer from high voltage capacitor.

6. Remove the two (2) screws holding the transformer to bottom plate.

7. Remove the transformer.

POWER TRANSFORMER REMOVAL

Page 16

R-211A

CAUTION: WHEN REPLACING THE MAGNETRON,

BE SURE THE R.F. GASKET IS IN PLACE AND THE MAGNETRON MOUNTING SCREWS ARE TIGHTENED SECURELY.

MAGNETRON REPLACEMENT

Removal

1. CARRY OUT 3D CHECKS.

2. Disconnect the wire leads from the magnetron.

3. Carefully remove the two (2) screws holding the magnetron to the waveguide flange.

4. Lift up magnetron with care so that the magnetron antenna is not hit by any metal object around antenna.

5. Now, the magnetron is free.

Re-install

1. Re-install the magnetron to the waveguide flange with two (2) screws diagonally as shown in Figure C-1.

2. Re-connect the wire leads to the magnetron. Refer to "PICTORIAL DIAGRAM".

3. Re-install the outer case and check that the oven is operating properly.

Figure C-1. Magnetron Replacement

Screws

Magnetron

Wavegiude  Flange

OVEN LAMP SOCKET REMOVAL

POSITIVE LOCK® CONNECTOR REMOVAL

1. CARRY OUT 3D CHECKS.

2. Pushing the lever of positive lock® connector.

3. Pull out the positive lock® connector.

CAUTION: When you (Service engineers) connect the positive lock

connectors to the terminals, connect the positive lock® so that the lever face you (Service engineers).

1. CARRY OUT 3D CHECKS

2. Pull the wire leads from the oven lamp socket by pushing the terminal hole of the oven lamp socket with the flat type small screw driver.

3. Tear the cushion from the light mount plate.

4. Bend the tab of the light mount plate holding the oven.

5. Lift up the oven lamp socket.

6. Now, the oven lamp socket is free.

Figure C-2. Oven lamp socket

POWER SUPPLY CORD REPLACEMENT

Removal

1. CARRY OUT 3D CHECKS.

2. Remove the single (1) screw holding the green/yellow wire to the oven cavity.

3. Disconnect the brown wire of the power supply cord from the fuse holder.

4. Cut away the connector (CE-230).

5. Release the moulding cord stopper of the power supply cord from the square hole of the oven cavity back plate, referring to the Figure C-4 (b).

6. Now, the power supply cord is free.

Re-install

1. Insert the moulding cord stopper of power supply cord

into the square hole of the rear cabinet, referring to the Figure C-4 (b).

2. Install the earth wire lead of power supply cord to the oven cavity with one (1) screw and tight the screw.

3. Connect the brown wire of the power supply cord to the fuse holder correctly, referring to the Pictorial Diagram.

4. Make sure that the blue wire lead of main wire harness and white wire lead of the power supply cord are stripped 15mm length from its end .

5. Wind the conductor of the blue and white wires each other.

6. Insert them into the connector (CE-230). And clamp it.

Oven lamp socket

Terminal

Wire lead

Terminal hole

Flate type small screw driver

Terminal

Push

Pull down

Lever

Positive lock® connector

Figure C-3 Positive lock® connector

Page 17

R-211A

Figure C-4(a). Power Supply Cord Replacement

Figure C-4 (b) Power Supply Cord Replacement

CONTROL PANEL ASSEMBLY AND SWITCH LEVER REMOVAL

1. CARRY OUT 3D CHECKS.

2. Disconnect the leads from the timer motor.

3. Remove the one (1) screw holding the chassis support to the front plate of the oven cavity.

4. Remove the chassis support from the oven.

5. Lift up the control panel and release it from the oven cavity.

6. Now, the control panel assembly is free.

7. Open the door. Remove the switch lever from the front plate of the oven cavity.

Removal

1. Disconnect the oven from the power supply.

2. Remove the turntable and turntable support from the oven cavity.

3. Turn the oven over.

4. Cut the four (4) bridges holding the turntable motor cover to the bottom plate with the cutting pliers as shown in Figure C-5.

CAUTION: DO NOT DROP THE TURNTABLE MOTOR

COVER INTO THE OVEN AFTER CUTTING THE BRIDGES. BECAUSE IT WILL DAMAGE THE WIRE LEADS OF THE MOTOR AND IT IS DIFFICULT TO REMOVE IT OUT OF THE OVEN.

5. Remove the turntable motor cover from the bottom plate.

6. Disconnect the wire leads from the turntable motor.

7. Remove the single (1) screw holding the turntable motor to the oven cavity.

8. Remove the turntable motor from the oven cavity.

TURNTABLE MOTOR REPLACEMENT

9. Remove the O-ring and washer from the turntable motor.

10.Now, the turntable motor is free.

Re-install

1. Remove the any sharp edges on the turntable motor cover and the bottom plate with the cutting pliers.

2. Re-install the O-ring.

3. Apply the grease (Shinetsu silicone grease G-420 of Sinetsu Chemical Co. Ltd. or Toray Silicone grease SH-14 of Toray Silicone Co., Ltd.) to the O-ring and the base of the turntable motor shaft as shown in Figure C-

4. Re-install the turntable motor with the O-ring and washer to the oven cavity with the single (1) screw.

5. Re-connect the wire leads to the turntable motor.

6. Insert the tab of the turntable motor cover into the hole of the bottom plate as shown in Figure C-5.

7. Re-install the turntable motor cover to the bottom plate with one (1) screw XHTSD40P08RV0 or XFPSD40P08K00 as shown in Figure C-5.

Cutting pliers

Bridges

Turntable motor  cover

XHTSD40P08RV0

or

XFPSD40P08K00

Tab Hole

Bottom plate

Screw:

Washer

O-ring

Base of turntable motor shaft

Turntable motor

O-ring

Washer

Apply grease here

Figure C-5. Turntable Motor Cover

Figure C-6. Washer and O-ring Installation and

Grease Applying.

Oven Cavity

Power Supply  Cord

Brown Wire

Fuse Holder

Blue Wire

Green/ Yellow  Wire

Square Hole

Moulding  Cord Stopper

Oven Cavity  Back Plate

Power Supply Cord

15 mm

Connector CE-230

Blue wire lead of  power supply cord

Wire lead of the  main wire harness

Page 18

R-211A

FAN MOTOR REPLACEMENT

REMOVAL

1. CARRY OUT 3D CHECKS.

2. Disconnect the wire leads from the fan motor.

3. Remove the one (1) screw holding the chassis support to the oven cavity front plate.

4. Remove the chassis support .

5. Release the filament lead of the power transformer and the H.V. wire from the fan duct.

6. Remove the one (1) screw holding the fan duct to the waveguide flange.

7. Release the fan motor assembly from the oven cavity.

8. Remove the fan blade from the fan motor shaft according to the following procedure.

1) Hold the edge of the rotor of the fan motor by using

a pair of groove joint pliers.

CAUTION:

• Make sure that any pieces do not enter the gap between the rotor and the stator of the fan motor. Because the rotor is easy to be shaven by pliers and metal pieces may be produced.

• Do not touch the pliers to the coil of the fan motor because the coil may be cut or injured.

• Do not transform the bracket by touching with the pliers.

2) Remove the fan blade assembly from the shaft of the fan motor by pulling and rotating the fan blade with your hand.

3) Now, the fan blade will be free.

CAUTION:

• Do not re-use the removed fan blade be-

cause the hole (for shaft) may be lager than normal.

9. Remove the two (2) screws holding the fan motor to the fan duct.

10. Now, the fan motor is free.

INSTALLATION

1. Install the fan motor to the fan duct with the two (2) screws.

2. Install the fan blade to the fan motor shaft according the following procedure.

1) Hold the centre of the bracket which supports the shaft of the fan motor on the flat table.

2) Apply the screw lock tight into the hole (for shaft) of the fan blade.

3) Install the fan blade to the shaft of fan motor by pushing the fan blade with a small, light weight, ball peen hammer or rubber mallet.

CAUTION:

• Do not hit the fan blade strongly when installed

because the bracket may be transformed.

• Make sure that the fan blade rotates smooth

after installed.

• Make sure that the axis of the shaft is not

slanted.

3. Install the fan motor assembly to the oven cavity by fitting the holes of the fan duct into the tabs of the oven cavity.

4. Re-install the fan duct to the waveguide flange with the one (1) screw.

5. Insert the end of the chassis support into the slit of the oven cavity rear cabinet.

6. Re-install the chassis support to the oven cavity front plate with the one (1) screw.

7. Install the filament lead and the H.V. wire into the hole of the fan duct .

8. Connect the wire leads to the fan motor, referring to the pictorial diagram.

Rear View

Gap

Rotor

Bracket

Stator

Groove joint pliers

Coil

Shaft

Axis

Stator

These are the areas  that should be held with a pliers

Rotor

Shaft

Table

Center of bracket

Side View

1ST. LATCH SWITCH, 2 ND. LATCH SWITCH AND MONITOR SWITCH REMOVAL

1. CARRY OUT 3D CHECKS.

2. Disconnect wire leads from all switches.

3. Remove the control panel assembly and switch lever from the oven cavity front flange. Referring to chapter "CONTROL PANEL ASSEMBLY AND SWITCH LEVER REMOVAL"

4. Remove two (2) screws holding latch hook to oven flange.

5. Remove latch hook assembly from oven flange.

6. Push outward on the two (2) retaining tabs holding switch in place.

7. Switch is now free.

Re-install

1. Re-install each switch in its place. The 1st. latch switch and monitor switch are in upper position. The 2nd. latch switch is in the lower position.

Page 19

R-211A

2. Re-connect wire leads to each switch. Refer to chapter "Pictorial Diagram".

3. Secure latch hook (with two (2) mounting screws) to oven flange.

4. Re-install the switch lever and the control panel assembly to the oven cavity front flange.

5. Re-connect wire leads to the timer motor. Refer to chapter "Pictorial Diagram".

6. Make sure that monitor switch is operating properly and check continuity of the monitor circuit. Refer to chapter "Test Procedure", and Adjustment Procedure below.

1ST. LATCH SWITCH, 2ND. LATCH SWITCH AND MONITOR SWITCH ADJUSTMENT

If the 1st. latch switch, 2nd. latch switch and monitor switch do not operate properly due to a misadjustment, the following adjustment should be made.

1. Loosen the two (2) screws holding the latch hook to the flange of the oven front face.

2. With the door closed, adjust latch hook by moving it back and forth and up and down. In and out play of the door allowed by the upper and lower position of the latch hook should be less than 0.5mm. The horizontal position of the latch hook should be adjusted so that the monitor switch is activated with the door closed. The vertical position of the latch hook should be adjusted so that the 1st. latch switch and the 2nd. latch switch are activated with the door closed.

3. Secure the screws firmly.

4. Check the operation of all switches. If each switch has not activated with the door closed, loosen screw and adjust the latch hook position.

After adjustment, make sure of the following.

1. In and out play of the door remains less than 0.5mm when in the latched position. First check upper position of latch hook, pushing and pulling upper portion of door toward the oven face. Then check lower portion of the latch hook, pushing and pulling lower portion of door toward the oven face. Both results (play in the door) should be less than 0.5mm.

2. The 1st. latch switch and 2nd. latch switch interrupt the circuit before the door can be opened.

3. The monitor switch contacts close when the door is opened.

4. Re-install outer case and check for microwave leakage around the door with an approved microwave survey meter. (Refer to Microwave Measurement Procedure.)

LATCH HOOK

LATCH HEADS

DOOR

MONITOR SWITCH

1 ST. LATCH SWITCH

SWITCH LEVER

2ND. LATCH SWITCH

Figure C-7. Latch Switch Adjustments

DOOR REPLACEMENT

7. Release two (2) pins of door panel from two (2) hole of upper and lower oven hinges by lifting up.

8. Now, door panel is free from oven cavity.

9. Release door panel from ten (10) tabs of door frame and remove door frame by sliding the door panel downward.

10.Now, door panel with sealer film is free.

11.Tear sealer film from door panel.

12.Now, door panel is free.

13.Slide latch head upward and remove it from door frame with releasing latch spring from door frame and latch head.

14.Now, latch head and latch spring are free.

15.Remove door screen from door frame.

16.Now, door screen is free.

RE-INSTALL

1. Re-install door screen to door frame.

2. Re-install latch spring to the head. Re-install latch spring to the door frame. Re-install latch head to the door frame.

3. Re-install door panel to door frame by fitting ten (10) tabs of door frame to ten (10) holes of door panel.

4. Put sealer film on door panel. Refer to "Sealer Film"

REMOVAL

1. Disconnect oven from power supply.

2. Push the open button and open the door slightly.

3. Insert a putty knife (thickness of about 0.5mm) into the gap between the choke cover and corner portion of door panel as shown in Figure C-8 to free engaging parts.

4. Try the principles of the lever and lift up the choke cover by inserting a putty knife in order shown in figure C-8.

5. Release choke cover from door panel.

6. Now choke cover is free.

Putty Knife

Choke Cover

Door Panel

Figure C-8. Door Disassembly

Page 20

R-211A

and figure C-10, on how to handle the new film.

5. Catch two (2) pins of door panel on two (2) hole of upper and lower oven hinges.

6. Re-install choke cover to door panel by pushing.

Note: After any service to the door; (A) Make sure that 1st. latch switch, 2nd. latch switch

and monitor switch are operating properly. (Refer to chapter "Test Procedures".).

(B) An approved microwave survey meter should be

used to assure compliance with proper microwave radiation emission limitation standards.

After any service, make sure of the following :

1. Door latch heads smoothly catch latch hook through latch holes and that latch head goes through centre of latch hole.

2. Deviation of door alignment from horizontal line of cavity face plate is to be less than 1.0mm.

3. Door is positioned with its face pressed toward cavity face plate.

4. Check for microwave leakage around door with an approved microwave survey meter. (Refer to Microwave Measurement Procedure.)

Note: The door on a microwave oven is designed to act

as an electronic seal preventing the leakage of microwave energy from oven cavity during cook cycle. This function does not require that door be air-tight, moisture (condensation)-tight or lighttight. Therefore, occasional appearance of moisture, light or sensing of gentle warm air movement around oven door is not abnormal and do not of themselves, indicate a leakage of microwave energy from oven cavity.

UPPER  OVEN HINGE

DOOR PANEL

CHOKE  COVER

LOWER  OVEN  HINGE

Figure C-9. Door Replacement

SEALER FILM

Installation

1. Put the adhesive tape on the backing film of the sealer film as shown in Fig. C-10.

2. Tear the backing film by pulling the adhesive tape.

3. Put the pasted side of the sealer film on the door panel.

Sealer film

Backing film

Adhesive tape

Figure C-10. Sealer film

Page 21

R-211A

MICROWAVE MEASUREMENT

After adjustment of door latch switches, monitor switch and door are completed individually or collectively, the following leakage test must be performed with a survey instrument and it must be confirmed that the result meets the requirements of the performance standard for microwave oven.

REQUIREMENT

The safety switch must prevent microwave radiation emission in excess of 5mW/cm2 at any point 5cm or more from external surface of the oven.

PREPARATION FOR TESTING:

Before beginning the actual test for leakage, proceed as follows;

1. Make sure that the test instrument is operating normally as specified in its instruction booklet. Important: Survey instruments that comply with the requirement for instrumentations as prescribed by the performance standard for microwave ovens must be used for testing.

Recommended instruments are: NARDA 8100 NARDA 8200 HOLADAY HI 1500 SIMPSON 380M

2. Place the oven tray into the oven cavity.

3. Place the load of 275 ± 15ml of water initially at 20 ± 5˚C in the centre of the oven tray. The water container should be a low form of 600 ml beaker with inside diameter of approx. 8.5cm and made of an electrically non-conductive material such as glass or plastic. The placing of this standard load in the oven is important not only to protect the oven, but also to insure that any leakage is measured accurately.

4. Close the door and turn the oven ON with the timer set for several minutes. If the water begins to boil before the survey is completed, replace it with 275ml of cool water.

5. Move the probe slowly (not faster that 2.5cm/sec.) along the gap.

6. The microwave radiation emission should be measured at any point of 5cm or more from the external surface of the oven.

mW cm

Microwave leakage measurement at 5 cm distance

SHARP

Page 22

R-211A

SCHEMATIC

NOTE: CONDITION OF OVEN

1. DOOR CLOSED.

2. VARIABLE COOKING CONTROL "HIGH".

3. TIMER ON.

SCHEMATIC

NOTE: CONDITION OF OVEN

1. TIMER OFF.

2. DOOR CLOSED.

Figure O-1 Oven Schematic-OFF Condition

NOTE: "★" indicates components with potential above 250V.

Figure O-2 Oven Schematic-ON Condition

BLU

BRN

G-Y/18

EARTH

FAN MOTOR

TURNTABLE

MOTOR

POWER

TRANSFORMER

MAGNETRON

MONITOR

RESISTOR

0.8/20W

MONITOR

SWITCH

TTM

220V ~ 50Hz

THERMAL CUT-OUT 95˚C (MG)

TEMPERATURE FUSE120˚C (OVEN) 

MONITOR FUSE M6.3A

H.V.RECTIFIER

CAPACITOR

0.86µ

AC2000V

2ND.  LATCH SWITCH

POWER SELECT SWITCH

DEFROST SWITCH

MAIN SWITCH

1ST. LATCH SWITCH

OVEN LAMP

BLU

BRN

G-Y/18

EARTH

FAN MOTOR

TURNTABLE

MOTOR

POWER

TRANSFORMER

MAGNETRON

MONITOR

RESISTOR

0.8/20W

MONITOR

SWITCH

TTM

220V ~ 50Hz

THERMAL CUT-OUT 95˚C (MG)

TEMPERATURE FUSE120˚C (OVEN) 

MONITOR FUSE M6.3A

H.V.RECTIFIER

CAPACITOR

0.86µ

AC2000V

2ND.  LATCH SWITCH

POWER SELECT SWITCH

DEFROST SWITCH

MAIN SWITCH

1ST. LATCH SWITCH

OVEN LAMP

Page 23

R-211A

Figure S-1. Pictorial Diagram

RED

GRY

BLK BLK

RED

WHT

GRY

BLK

TEMP. FUSE

120˚C (OVEN)

1ST LATCH

SWITCH

MONITOR

SWITCH

2ND LATCH

SWITCH

TURNTABLE MOTOR

COM.

BLK

ORG

POWER

SELECT

SWITCH

COM.

THERMALCUT-OUT

95˚C (MG)

TIMER MOTOR

BLK

RED

WHT

RED

RED

SCREW

CONNECTOR

OVEN CAVITY

BACK PLATE

POWER SUPPLY CORD

BLK

WHT

HIGH VOLTAGE COMPONENTS

MAGNETRON

FUSE 

M6.3A

HIGH 

VOLTAGE

CAPACITOR

H.V.

RECTIFIER

FAN MOTOR

GRY

ORG

POWER 

TRANSFORMER

HIGH VOLTAGE 

WIRE B

WHT

GRYWHT

BLU

BRN

GRY



RED

ORG

WHT

OVEN LAMP

AND SOCKET

Black Mark

NOTE: Neutral (WHT) wire

must be connected to the

terminal with black mark on the

oven light socket.

GRY

WHT

MONITOR

RESISTOR

(FRONT SIDE)

GRN/YLW

RED

RED ORG

G

R

Page 24

R-211A

PARTS LIST

Note: The parts marked "∆" may cause undue microwave exposure.

The parts marked "★" are used in voltage more than 250V.

REF. NO. PART NO. DESCRIPTION Q'TY CODE

ELECTRIC PARTS

1- 1 QSWTEA123WRE0 Timer motor 1 BC 1- 2 QSW-MA110WRE0 1st. latch switch & 2nd. latch switch 2 AK 1- 3 QSW-MA111WRE0 Monitor switch 1 AK 1- 4 QSOCLA022WRE0 Oven lamp socket 1 AG 1- 5 RR-WZA022WRE0 Monitor resistor 0.8Ω 20W 1 AK

★ 1- 6 FH-DZA047WRK0 High voltage rectifier 1 AQ ★ 1- 7 RC-QZA200WRE0 High voltage capacitor 1 AV

1- 8 RMOTEA265WRE0 Fan motor 1 AZ 1- 9 QFSHDA019WRE0 Fuse holder 1 AH 1-10 QACC-A065WRE0 Power supply cord 1 AF 1-11 QFS-C0019WRE0 Fuse M6.3A 1 AE 1-12 QFS-TA015WRE0 Temperature fuse 120˚C 1 AG 1-13 RLMPTA069WRE0 Oven lamp 1 AK 1-14 RMOTDA173WRE0 Turntable motor 1 AX 1-15 RTHM-A079WRE0 Thermal cut-out 95˚C 1 AL

★ 1-16 RTRN-A491WRE0 Power transformer 1 BL

∆★ 1-17 RV-MZA198WRE0 Magnetron 1 BN

1-18 QPLGAA018WRE0 AC plug 1 AL

CABINET PARTS

2- 1 GCABUA602WRP0 Outer case cabinet 1 AX 2- 2 GDAI-A269WRP0 Bottom plate 1 AS 2- 3 GLEGPA023WRE0 Foot 2 AB

CONTROL PANEL PARTS

3- 1 HPNLCB372WRR0 Control panel 1 AR 3- 2 JBTN-A977WRF0 Open button 1 AH 3- 3 JKNBKA568WRF0 Timer knob 1 AE 3- 4 JKNBKA569WRF0 Power CH knob 1 AE 3- 5 MSPRCA050WRE0 Open button spring 1 AB 3- 6 LSTY-A080WRE0 Timer knob retainer 1 AB 3- 7 QSW-MA111WRE0 Power select switch 1 AK

OVEN PARTS

∆ 4- 1 PHOK-A086WRF0 Latch hook 1 AQ

4- 2 LANGQA433WRW0 Light mount plate 1 AE 4- 3 PCUSUA237WRP0 Waterproof cushion 1 AF 4- 4 LBNDKA038WRP0 Capacitor holder 1 AF 4- 5 NFANJA029WRE0 Fan blade 1 AL 4- 6 PDUC-A623WRP0 Fan duct 1 AK

∆ 4- 7 FOVN-A361WRT0 Oven cavity 1 BB

4- 8 GLEGPA062WRF0 Leg 1 AK 4- 9 LANGTA318WRP0 Chassis support 1 AQ 4-10 MLEVPA206WRF0 Switch lever 1 AL 4-11 PCOVPA276WRE0 Waveguide cover 1 AM 4-12 PCUSGA312WRP0 Cushion 1 AB 4-13 PCUSUA443WRP0 Cushion 1 AE 4-14 PCUSUA445WRP0 Cushion 1 AE 4-15 PDUC-A624WRF0 Air separator 1 AH 4-16 PPACGA097WRE0 O-ring 1 AG 4-17 PCUSUA461WRP0 Cushion 1 AB

DOOR PARTS

∆ 5- 1 FDORFA296WRT0 Door panel 1 AT ∆ 5- 2 GWAKPA495WRR0 Door frame 1 AQ

5- 3 HPNL-A654WRR0 Door screen 1 AK

∆ 5- 4 LSTPPA154WRF0 Latch head 1 AG

5- 5 MSPRTA084WRE0 Latch spring 1 AB 5- 6 PSHEPA333WRE0 Sealer film 1 AE 5- 7 GCOVHA358WRF0 Choke cover 1 AK 5- 8 PCUSUA463WRP0 Cushion 1 AC 5- 9 PCUSUA190WRP0 Cushion 1 AC

MISCELLANEOUS

6- 1 FROLPA046WRK0 Turntable support 1 AQ 6- 2 NTNT-A034WRF0 Turntable 1 AM 6- 3 TINS-A603WRR0 Operation manual in Thai 1 AG 6- 3 TINS-A604WRR0 Operation manual in English 1 AF 6- 4 FW-VZB596WRE0 Main wire harness 1 AV

★ 6- 5 QW-QZA150WRE0 High voltage wire B 1 AF

6- 6 TCAUHA214WRR0 K caution label 1 AC 6- 7 TSPCNC470WRR0 Rating label 1 AF

Page 25

R-211A

Note: The parts marked "∆" may cause undue microwave exposure.

The parts marked "*" are used in voltage more than 250V.

REF. NO. PART NO. DESCRIPTION Q'TY CODE

HOW TO ORDER REPLACEMENT PARTS

To have your order filled prompty and correctly, please furnish the following information.

1. MODEL NUMBER 2. REF. NO.

3. PART NO. 4. DESCRIPTION

PACKING AND ACCESSORIES

6- 8 PSHE-A074WRR0 Menu label 1 AN 6- 9 TCADCA565WRR0 Cook book in Thai 1 AZ 6-10 QTANP0020YBEO Connector (CE-230) 1 AA 6-11 QW-QZA177WRE0 Earth wire 1 AK 6-12 TLABPA032WRR0 Grounding label 1 AG 6-13 TLABSA022WRR0 Fuse label M6.3A 1 AK

SCREWS,NUTS AND WASHERS

7- 1 XEPSD30P08XS0 Screw : 3mm x 8mm 1 AA 7- 2 XOTSD40P12000 Screw : 4mm x 12mm 4 AA 7- 3 XFPSD40P08K00 Screw : 4mm x 8mm 7 AA 7- 4 LX-EZA042WRE0 Special screw 2 AB 7- 5 LX-WZA028WRE0 Washer 1 AB 7- 6 XFPSD30P06000 Screw : 3mm x 6mm 1 AA 7- 7 XHTSD40P08RV0 Screw : 4mm x 8mm 2 AA 7- 8 XOTSD40P12RV0 Screw : 4mm x 12mm 11 AA 7- 9 XOTSE40P08000 Screw : 4mm x 8mm 4 AA 7-10 XFPSD30P10000 Screw : 3mm x 10mm 1 AA

TURNTABLE TRAY

TURNRABLE SUPPORT INTO THE  OVEN CAVITY

Not replaceable items.

TRAY PAD ASSY

(CPADBA172WRK0)

PACKING CASE SPAKCC913WRE0

DOOR PROTECTION SHEET

SPADPA204WRE0

MICROWAVE OVEN

TOP PAD ASSEMBLY FPADBA332WRK0

POLYETHYLENG BAG SSAKHA014WRE0

BOTTOM PAD ASSEMBLY FPADBA333WRK0

PRINTING MATERIAL

Page 26

R-211A

OVEN AND CABINET PARTS

4-3

1-4

1-13

7-2

4-2

4-13

7-3

1-17

7-9

2-1

7-8

7-9

4-5

7-2

7-3

6-6

6-7

4-6

4-14

7-7

6-12

6-11

1-8

7-8

7-3

1-7

4-4

1-6

4-9

7-2

4-1

1-2

1-3

4-10

4-12

1-16

7-4

4-8

7-8

2-3

7-8

2-2

4-15

7-3

1-14

4-16

7-5

4-11

4-7

6-1

6-2

1-12

1-9

1-15

1-18

7-6

4-17

1-5

7-2

7-3

1-10

6-13

1-11

7-10

Page 27

R-211A

CONTROL PANEL PARTS

MISCELLANEOUS

DOOR PARTS

5-1

5-8

5-3

5-6

5-7

5-2

5-4

5-9

5-5

Actual wire harness may be different than illustration.

6-11

6-5

6-10

6-4

3-2

3-5

3-3

3-4

3-1

1-1

3-7

3-6

7-1

Page 28

R-211A

'97SHARP CORP. (6K0.070E) Printed in Japan