Sharp R-771 OE Service Manual

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Page 1

sHARf=

SERVICE MANUAL

KASM482078R

SHARP

MICRCIWAVE

OVEN

R-771

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

Page 2

SERVICE MANUAL

SHARP

R-7710E

FOREWORD

This Manual has been prepared to provide Sharp Electronics Corp.

Service Personnel with complete Operation and Service Information for the Sharp Counter Top Microwave Oven, R-7710E.

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

CAUTION

MICROWAVE

RADIATION

Personnel 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.

SHARP CORPORATION

OSAKA, JAPAN

Page 3

TABLE OF CONTENTS

Page

FOREWORD..

..................................................................

CAUTION, MICROWAVE RADIATION

.................................................

CHAPTER I PRODUCT DESCRIPTION.

................................................

Explanation of Microwave Cooking.

.................................................

Specifications

................................................................

CHAPTER II OPERATION ..........................................................

Normal Cooking Sequence

.......................................................

Description of Operating Sequence.

.................................................

OffCondition

............................................................

IdleCondition

...........................................................

CookingCondition..

......................................................

High Condition.

......................................................

Med. LOW (Defrost) Med., Med. High and Low Condition

...........................

Description and Function of Components

...

.........................................

Variable Cooking Control. ...................................................

Timer .................................................................

Door Open Mechanism. .....................................................

.10

Upper and Lower Latch Switches.

..............................................

Monitor Switch.

..........................................................

CHAPTER III

SERVICING..........................................................l

Troubleshooting Guide.

.........................................................

OffCondition............................................................l 1

IdleCondition..

.......................................................

..I

CookingCondition..

....................................................

..ll

Test Procedures.

.............................................................

.13

Magnetron Assembly Test.

..................................................

.13

Power Transformer Test ....................................................

.14

RectifierTest............................................................l

High Voltage Capacitor Test

.................................................

.14

Short Protector Test

......................................................

.14

FanMotorTest...........................................................l

TimerTest..............................................................l

Magnetron Therm0 Cut-out Test

.............................................. .15

Upper Latch Switch Test

................................................... .15

Lower Latch Switch Test ...................................................

.15

Vari-switch Test

......................................................... .15

Vari-motor Test

......................................................... .15

Monitor Switch Test

.......................................................

.16

CHAPTER IV COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURES

................

.16

Warning....................................................................l

OuterCaseRemoval............................................................l

High Voltage’Components Removal ................................................

.17

Power Transformer Removal ...................................................

:..17

OvenLampRemoval...........................................................l

Turntable Motor Removal.

......................................................

.18

Turntable Roller Removal.

......................................................

.18

FanMotorRemoval............................................................l 8

Magnetron Assembly Removal.

...................................................

.18

Upper Latch Switch and Monitor Switch Removal.

......................................

.19

Lower Latch Switch Removal

....................................................

-19

Control Panel Assembly and Components Removal

......................................

.20

Vari-motor Assembly.

.....................................................

.20

Timer.................................................................2

CookSwitch.............................................................2

Page 4

Cook Lamp .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . .

Upper Latch Switch, Lower Latch Switch and Monitor Switch Adjustment

......................

.21

Door Replacement and Adjustment

................................................

.22

MICROWAVE MEASUREMENT.

.....................................................

.23

Requirment.................................................................2

Preparation for The Testing.

.....................................................

.23

SCHEMATIC

DIAGRAM............................................................24

PICTORIAL DIAGRAM . , . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25

PARTS

LIST....................................................................26

Page 5

CHAPTER I

PRODUCT DESCRIPTION

EXPLANATION OF MICROWAVE COOKING

The Sharp Counter Top Microwave Oven uses microwave energy to produce heat in the food to be cooked. Unlike conventional ovens microwave energy will cook foods without applying external heat.

Microwaves, which are short electromagnetic waves of

RF (radio frequency) energy, pass through materials such as glass, paper, china and most plastics. Materials such as metal and aluminum foil tend to reflect

micro-

waves and may be used only as recommended in the

cook-

Materials with a high moisture content, like most foods,

wiIl

absorb microwave energy. As the microwave energy at a frequency of 2450 Megahertz enters the food, the molecules align themselves with the energy. Because the microwaves are changing polarity every half cycle, the food molecules are changing direction every half cycle or

oscillating back and forth 4,900,000,000 times per second. This

high speed oscillation causes friction between the

mole-

cules,

thereby converting the microwave energy to heat.

ing instructions.

SPECIFICATIONS

Power requirements

Power consumption Microwave output power Case dimensions

Width Height Depth

Cooking cavity dimensions

Width Height Depth

Turntable diameter

650W (2 litre water load)

627mm 400mm 458mm

395mm

260mm 422mm

385mm

Control complement

Cook Switch 60 min. Dual Speed Timer

Variable Cooking Control

Repetition Rate:

HIGH:

240V

50Hz

Single phase, 3 wire earthed

1.3kW

Full power throughout the cooking time.

MED. HIGH:

23.2 sec. ON,

6.8 sec. OFF, approx. 70% of full power.

MED.:

16.5 sec. ON, 13.5 sec. OFF, approx. 50% of full power.

MED. LOW (DEFROST):

9.8 sec. ON, 20.2 sec. OFF, approx. 30% of full power.

LOW:

sec. ON, 25

sec. OFF, approx. 10% of full power.

Approx. 28kg

Page 6

CHAPTER II OPERATION

NORMAL COOKING

SEQUENCE

To start cooking:

Place the food to be cooked in the oven and close the door firmly. Set the cooking control selector for a desired position, Set the timer for a desired cooking time. The oven

lamp will come on and the fan motor will rotate immediately. Push the cook button. The cook lamp will glow to

indicate the oven is in the cook cycle, and the turntable motor, timer motor and vari-motor will operate.

Note:

If the oven door is opened during the cook cycle, the oven will go out of the cook cycle (no microwave energy) and the timer will stop. This is

done so the exact cooking time remains on the timer. To restore cooking operation, the door must be closed and the cook button must be pushed again. At the end of the cook cycle (timer returned to “O”), cook lamp will go out and the timer bell will ring. The oven will stop supplying the microwave energy.

DESCRIPTION OF OPERATING SEQUENCE

The following is a complete description of component

fanctions during the three stages of oven operation.

l-6. The negative 4000 volts D.C. is applied to the

cathode of the magnetron tube. This causes it to

OFF CONDITION

With the tinier dial at “0” position and the door closed, no components in the oven will operate; (Figure 1). But the oven lamp and fan motor will turn on with the door opened.

IDLE CONDITION

Closing the door activates both door interlock switches;

upper latch switch and lower latch switch.

Selecting a cooking time closes the timer contacts leading to the oven lamp, fan motor and lower latch switch, therefore the oven lamp and fan motor turn on; (Figure 2).

COOKING CONDITION

1. HIGH CONDITION When the cook switch is pushed and the cooking control selector set to “HIGH” position, the following operation occurs; (Figure 3).

l-l. Cook lamp, timer motor, turntable motor and

vari-motor are energized.

1-2. The 240 volts AC. is supplied to a primary wind-

ing of the power transformer through the

vari-

switch.

1-3. The power transformer converts 3.4 volts A.C.

output on the filament winding and approximately

2,000 volts

AC.

on the high voltage winding.

14. The 3.4 volts A.C. output from filament winding heats the magnetron

tX.unent.

l-5. The 2,000 volts

AC.

output from the secondary winding is sent to a voltage doubler circuit consisting of a high voltage capacitor and a rectifier.

The 2,000 volts A.C. is-converted to approximately 4,000 negative D.C. voltage (peak to peak) by

the voltage doubler circuit and sent to the magnetron assembly.

oscillate and produce a 2450 MHz cooking fre-

quency

1-7. The RF energy produced by the magnetron tube

is channeled through a waveguide into the cavity

feedbox, and then into the oven cavity where the

food is placed to be cooked.

l-8. Upon completion of the selected cooking time,

the timer bell rings once. And the timer switch is deactivated. The oven reverts to the off condition.

In the case upper latch switch fails with its contacts closed when the door is opened, the monitor switch will form a short circuit through the fuse and the upper

latch switch.

2. MED. LOW (DEFROST), MED., MED. HIGH and LOW CONDITION

When the cook switch is pushed and the cooking control selector is set to “MED. LOW”, “MED.“,

“MED. HIGH”, or “LOW”, the following operation

occurs.

2-l. Above l-1 operation occurs.

2-2. The vari-motor rotates at two (2) revolutions per

minute. -In case the cooking control selector is set

to “MED. LOW”, the 240 volts A.C. is supplied to

the power transformer intermittently through the vari-switch which is operated, at approx. 9.8 seconds ON and 20.2 seconds OFF repetition rate by means of a cam linked to the vari-motor shaft. The repetition rate for others are as follows;

LOW:

approx.

5 seconds ON, 25 seconds

OFF

MED. :

approx. 16.5 seconds ON, 13.5 seconds OFF

MED. HIGH:

approx. 23.2 seconds ON, 6.8 seconds OFF

2-3. The power transformer converts while the 240

volts

AC.

is supplied to the primary winding.

2-4. Then above 1-3, 1-4, l-5, 1-6, l-7 and l-8 opera-

tions occur.

Page 7

240V

50Hz

NOTE : CONDITION

1. DOOR CLOSED

FUSE

MlOA

UPPER LATCH

SWITCH

-- -1

I I

I I I

LOWER LATCH

SWITCH

MAGNETRON

THERM0 CUT-OUT

COOK

TURNTABLE

SWITCH

MOTOR

COOK LAMP

I-

I I,

w :

L.-Y- -

VARI-MOTOR

----_

TIMER

I I

VARI-

SWITCH

-------m--w-

--- --------

POWER TRANSFORMER

-------I

I 1

HIGH

REC?z

VOLTAGE

%APACITOR

I”’

D,: SHORT

PROTECTOR

---A

MAGNETRON

Figure 1. Oven Schematic - Off Condition

Page 8

240V

50Hz

NOTE: CONDITION

1. DOOR CLOSED

MONITOR

SWITCH

TIMER

UPPER LATCH

SWITCH

MAGNETRON I THERM0 CUT-OUT

COOK

TURNTABLE

SWITCH

;

MOTOR

I-

I II

w :

VARI-MOTOR

----_

TIMER

I I I

VARI-

SWITCH

L---------------

--_-----I

POWER TRANSFORMER

-I

------

. --

D,:

SHORT

---

MAGNETRON

PROTECTOR

Figure 2. Oven Schematic - Idle Condition

Page 9

SCHEMATIC NOTE: CONDITION

OF OVEN

1. DOOR CLOSED

2. TIMER “ON”

3. COOK SWITCH “ON”

4. VARIABLE COOKING CONTROL “HIGH”

240V

50Hz

MONITOR SWITCH

TIMER

OVEN LAMP

CONTACTS

UPPER

LOWER

LATCH

SWITCH

TURNTABLE MOTOR

COOK LAMP

r--

VARI-MOTOR

----------------

POWER TRANSFORMER

I--------

-- 1

FUSE

MlOA

MAGNETRON

;

THERM0 CUT-OUT

COOK

I SWITCH

VARI-

SWITCH

RT PROTECTOR

Figure 3. Oven Schematic - Cooking Condition

Page 10

DESCRIPTION AND FUNCTION OF COMPONENTS

VARIABLE COOKING CONTROL

The variable cooking control consists of the vari-motor,

vari-switch, gear, select lever bracket assembly, etc.

the purpose of the vari-motor is to rotate a cam which is going to turn the vari-switch on and off within 30 seconds time base. The vari-switch is operated ON by the cam lever and cam which are linked to the vari-motor shaft. If the variable

cooking control is set at LOW, MED. LOW, MED. or

MED. HIGH position, 240 volts A.C. is supplied to the power transformer intermittently within a 30 seconds time base. A half

(l/2)

of full power would be approx. 16 seconds of the switch on the 14 seconds of off time. The following chart shows the vari-switch operation in the various modes.

LOW

5 Seconds

OFF

(25 sec.)

Microwave Power = Approx. 10%

MED. LOW (DEFROST)

9.8 Seconds

OFF (20.2 sec.)

Microwave Power = Approx. 30%

MED.

16.5 Seconds

OFF

(13.5

sec.)

Microwave Power = Approx. 50%

MED. HIGH

HIGH

23.2 Seconds

OFF

(6.8

sec.)

Microwave Power = Approx. 70%

Microwave Power = 100%

30 Seconds

-4

TIMER

Timer switch contacts: The timer switch contacts are mechanically opened or closed by turning the timer knob located on the timer

motor shaft.

These contacts control the current path

to the oven lamps and fan motor, etc.

Timer bell: The bell striker is mechanically driven by the timer motor and rings once at the end of the cook cycle.

Timer is dual speed type: cook time from 0 to 60 minutes

Timer motor:

may

be selected. Up to 10 minutes the dial is divided in, 15 second intervals. From 10 minutes to 60 minutes the dial is marked off in 5 minute intervals. The timer motor is energized through the cook switch and therm0 cut-out contacts. When the timer reaches the 0 point on the scale, the timer switch opens the circuit to oven lamps, fan motor, turntable motor, cook lamp, vari-motor and timer motor, and the cook cycle stops.

Page 11

DOOR OPEN MECHANISM

The door can be opened by pushing the open button on the control panel, refer to Figure 4. Pushing the open button, the open plate on the open device pushes the door lever on the door.

Therefore, the lower and upper latch heads remove upwards, and then those latch heads are released from the lower and upper latch hooks.

Now, the door can be opened.

UPPER AND LOWER LATCH SWITCHES

The upper latch switch is mounted in the upper latch hook

and the lower latch switch is mounted in the lower latch

hook. They are activated by the latch heads on the door.

When the door is opened, the switches interrupt the circuit

to all components except the oven lamps and fan motor.

A cook cycle cannot take place until the door is firmly

closed thereby activating both switches.

MONITOR SWITCH

The monitor switch mounted on the upper latch hook is

activated (the contacts opened) by the latch head on the

door while the door is closed, refer to Figure 5. The switch is intended to render the oven inoperative by means of blowing the fuse when the contacts of the upper latch switch fail to open when the door is opened.

Functions;

1. When the door is opened, the monitor switch contacts close (to the ON condition) due to their being a normally closed. At this time the upper latch switch is in the OFF condition (contacts open) due to its being a normally open contact switch.

2. As the door goes to a closed position, the monitor switch contacts are first opened and then the upper latch switch contacts close. (In case of opening the door, each of the two switches operate inversely.)

3. If the door is opened and the upper latch switch contacts fail to open, the fuse -blows simultaneously with the closing of the monitor switch contacts.

CAUTION: BEFORE REPLACING A BLOWN FUSE,

TEST THE UPPER LATCH SWITCH AND MONITOR SWITCH FOR PROPER OPERATION (REFER TO THE TEST PROCEDURE ON PAGE 15 and 16.)

dpen

Open

Button Device

Figure 4. Door Open Mechanism

Latch

Head

Latch

Head

,-/Upper

,d’

Latch Hook

”

Lower

Latch

Switch

Figure 5. Latch Switches and Monitor Switch

Page 12

CHAPTER III

SERVICING

TROUBLESHOOTING GUIDE

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

IMPORTANT:

If the oven becomes inoperative because of a blown fuse in the upper

latch-

monitor switch circuit, check the upper latch switch and monitor switch before

procedure letter which will be found in the “Test Procedure section on this service manual.

replacing the fuse.

PROBLEM POSSIBLE CAUSE

TEST PROCEDURE OR

CORRECTION

OFF CONDITION

Home fuse blows when power cord is plugged

into

wall receptacle.

Shorted wire in power cord

wire harness.

Replace cord or check wiring.

Oven lamp doesnot light with

door

opened. (Timer is at

“0” position.)

No power from service entrance.

Open wire in power cord or wire harness.

Check wall

outlet.

Replace same or repair wiring.

Blown fuse.

Check for short circuit and replace fuse.

Defective oven lamp.

Replace

both

oven lamps.

Defective lower

latch

switch

Procedure J.

Open or loose wire connection to the above

Check wiring.

Fan

motor

does not

operate.

Defective fan

motor.

Procedure F.

Open or loose wire connection.

Check wiring.

IDLE CONDITION

With the timer set, oven lamp does

not

light.

Fan

motor

does not

operate.

Defective oven lamp

Defective timer contacts.

Open or loose wire connection. Defective fan

motor.

Replace

both

oven lamps.

Procedure G.

Check wiring.

Procedure F.

Open or loose wire connection.

Check wiring.

COOKING CONDITION

Cook lamp does

not

light when

Defective cook switch.

cook switch is pushed.

Replace.

Defective upper

latch

switch

Procedure I.

Defective lower latch switch Procedure J.

Defective therm0 cut-out.

Defective cook lamp.

Open

loose wire connection to the above

components.

Procedure H.

Replace.

Check wiring.

Page 13

TROUBLESHOOTING GUIDE

(CONT’D)

PROBLEM

POSSIBLE CAUSE

TEST PROCEDURE OR

CORRECTION

Oven fuse blows when cook switch is pushed. (Oven

operation

all shut off)

Cook lamp lights,

but turntable

motor

does not operate.

Oven seems to be operating, but little or no

heat is

produced

in oven load.

(Variable cooking

control

selector

is set at “HIGH”

position.)

COOKING CONDITION

Defective rectifier. Defective short

protector.

Defective

turntable

motor.

Open or loose wire connection.

Defective vari-switch.

Defective magnetron.

Defective rectifier.

Defective high voltage capacitor.

Procedure C and E.

Replace.

Check wiring.

Procedure K.

Procedure A.

Procedure C.

Procedure D.

Oven operates normally when

the

variable cooking

control selector is

set at

“HIGH”

position,

but not in

any

other

mode.

Oven goes

into

cook cycles,

but extremely

uneven heating

produced in

oven load.

Defective power transformer.

Procedure B.

Open or loose wire connection. Check wiring.

Defective vari-motor.

Procedure L.

Open or loose wire connection.

Check wiring.

Defective variable cooking mechanism.

Check.

Turntable

does

not rotate

during cook

Replace

turntable motor

cycle due to

the motor

failure.

or check wiring.

Oven goes

into

cook cycle,

but

shut down before end

cycle.

Therm0

cut-out is

open.

Open or loose wire connection.

Procedure H.

Check wiring.

Page 14

TEST PROCEDURES

PROCEDUR-E ’

LETTER

COMPONENT TEST

MAGNETRON ASSEMBLY TEST

DISCHARGE THE HIGH VOLTAGE CAPACITOR BEFORE TOUCHING ANY OVEN COMPONENTS OR WIRING To test for an open filament, isolate the magnetron from the high voltage circuit. A

continuity

check across the

magnetron filament leads should indicate less than 1 ohm.

test

for a shorted magnetron, connect the ohmmeter leads between the magnetron filament leads and chassis

ground. This test should indicate an infinite resistance.

there is

little or no

resistance the magnetron is grounded

and must be replaced.

Power

output of

the magnetron can be measured by performing a water

temperature

rise test. This test should

only be used

above tests do not indicate a

faulty

magnetron and there is no defect in the following components

or wiring:

rectifier,

high voltage capacitor and power transformer.

MICROWAVE OUTPUT POWER Microwave

output

power from the magnetron can be measured

way of

substitution,

i.e. it can be measured by

using water load how much

can be absorbed

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.t/4.2 calorie is generated. On the

other

hand,

the

temperature of

the water with V (ml) rises AT (“C) during this microwave heating period, the calorie

the water

is V. AT. The formular is as follows;

P.t

4.2

= V.AT

4.2 . V.AT t

Our

condition

for the water load is as follows;

Water load . . . .2000 ml

Heating

time. .

120 seconds (2 minutes)

pi-q

Measuring

method;

Put the water load of two (2) litres on the center

the oven shelf.

The water load should be arranged in two (2) Pyrex beakers, the size

which is one (1)

litre,

and be placed at

right and left, side

side, on the oven shelf.

Measure the

temperature of

water

before

heating and also

after

heating during two minutes by microwave,

and,

calculate the

temperature

rise.

The

temperature

rise should be the average of temperature differences measured in each beaker.

3. The

output

power should be calculated as follows.

In case the measuring result is not

satisfactory,

execute the measurement several times and

judge

the result

from the

synthetic point of

view.

Microwave

output

power should be within + 15% of the nominal one.

Calculation of

output

power;

Microwave

output

power. . . P (W) = 70 x

(“C)

s =--

(ATL + ATR)

: average

temperature

rise

ATL = (TL~ - TL,) ATR =

(TR, -

TR,)

Q-2

: water

temperature after

heating in left beaker

TI-1

: water

temperature before

heating in

left beaker

TR2 TR,

water temperature after

heating in right

beaker

: water

temperature before

heating in right beaker

Page 15

TEST PROCEDURES (CONT’D)

PROCEDURE

LETTER

COMPONENT TEST

(Cont’d)

Measuring

condition;

As the microwave

output is

affected

several

conditions,

the measurement should be made carefully with following

attentions.

Initial temperature of salt water

should be 202 1°C. (The salt water should be

contained

bon (1) percent

salt.)

Well and

quickly stir the water

and the

temperature

measurement should be done

immediately after

heating.

2. The graduation

of thermometer

should be scaled

O.l”C at minimum and an accurate mercury

thermometer

recommended.

3. Water container should be one (1)

litre beaker

made of Pyrex glass and its

diameter approximately 12

cm.

4. Room

temperature

shoula be around 20°C.

5. Power supply voltage should be 240 volts.

POWER TRANSFORMER TEST

DISCHARGE THE HIGH VOLTAGE CAPACITOR BEFORE TOUCHING ANY OVEN COMPONENTS OR WIRING. Disconnect

primary input

terminals and measure

the

resistance with an ohmmeter. Check for

the continuity

coils with an ohmmeter. On

the

RX1 scale,

the

resistance

of the primary

coil should

be approximately

1.5 ohms

and

the

resistance of high voltage coil should be

approximately

107 ohms, and the resistance of filament coil should

be less than 1 ohm. With 240 volts A.C. applied

to the primary

winding, the voltage across

the filament

winding

should be

approximately

3.2 volts A.C. (HIGH VOLTAGES ARE PRESENT TO HIGH VOLTAGE TERMINAL, SO

EXTREME CAUTION SHOULD BE OBSERVED.)

RECTIFIER TEST

DISCHARGE THE HIGH VOLTAGE CAPACITOR BEFORE TOUCHING ANY OVEN COMPONENTS OR

WIRING.

Isolate the

rectifier

from the circuit. Using the highest ohm scale

the meter, read the resistance across the terminals

and observe, reverse the leads to the

rectifier

terminals and observe meter reading.

If a

short is

indicated in both

direc-

tions,,

or if an infinite

resistance is read in

both directions,

the

rectifier is probably defective

and should be

replaced

and check short

protector.

HIGH VOLTAGE CAPACITOR TEST

DISCHARGE THE HIGH VOLTAGE CAPACITOR BEFORE TOUCHING ANY OVEN COMPONENTS OR WIRING.

If the capacitor is

open, no high voltage will be available to the magnetron. Disconnect

input

leads and check

for

short or open between the terminals using an ohmmeter. Checking with a high ohm scale, if the high voltage

capacitor is

normal, the meter will

indicate continuity

for a short

time and should indicate an open

circuit

once the

capacitor is

charged.

the above is

not

the case, check

the

capacitor

with the

ohmmeter to

see

if it is

short circuited between-the terminals.

If it is

short

circuited,

replace the

capacitor.

SHORT PROTECTOR TEST

DISCHARGE THE HIGH VOLTAGE CAPACITOR BEFORE TOUCHING ANY OVEN COMPONENTS OR WIRING.

Isolate the

short

protector

from

the

circuit. Using

the

highest ohm scale

of the

meter, read

the

resistance across the

terminals, reverse the leads

to the

short

protector terminal

and observe meter reading. If an

infinite

resistance is

read in

both direction,

the short

protector is

good.

If a

short is

indicated in either direction,

the one is

probably

defective and should be replaced.

Page 16

TEST PROCEDURES

PROCEDURE

NUMBER

COMPONENT TEST

FAN MOTOR TEST

Check

240 volts is present between

the motor

terminals.

voltage is present,

but motor

does not

turn,

replace the

fan

motor.

check for loose

or broken

wire connections.

TIMER TEST

TIMER CONTACTS TEST Advance

the

timer and then

return

“0”

position

and check for

continuity

between the terminals.

If an

open

circuit is indicated

the advanced

position or

closed a circuit is indicated at “0”

position,

replace the timer.

TIMER MOTOR TEST Disconnect

the

wire leads from

the timer motor,

set the cooking mode at “HIGH” and check with voltage (240) to /

the

timer coil.

voltage is

present, but the

timer

motor

does not

turn,

replace

the

timer.

If no

power, check for loose or

broken

wiring.

MAGNETRON THERM0 CUT-OUT TEST

continuity

check across the therm0

cut-out

terminals should indicate a closed circuit unless the

temperature

the

therm0

cut-out

reaches

approximately

104” C.

The therm0

cut-out

resets

automatically at approximately

79” C. An open thermo.

cutout

indicates overheating of

the

magnetron assembly. Check for

restricted

air flow to the magnetron through

the

opening in the chassis, especially

the

cooling

duct.

UPPER LATCH SWITCH TEST

The upper latch switch can be checked with an ohmmeter.

Isolate the switch and then connect the meter

leads to the common (COM) and normally open (NO) terminals

ths switch. The meter should indicate an open

circuit with the

door opened

and a closed

circuit

with the

door

closed.

In case

improper operation is indicated,

make a necessary switch adjustment or replace the defective switch.

See adjustment

procedure on

page 21.

LOWER LATCH SWITCH TEST

Isolate

the

switch and

connect

the ohmmeter leads to the common (COM) and normally open (NO) terminals

the

switch. The meter should

indicate an

open circuit with the

door

opened and a closed circuit with the

door

closed.

When the meter leads

connected to the

common (COM) and normally closed (NC) terminals

the switch, it should

indicate a

closed

circuit

with

the door

opened and an open circuit with the

door

closed.

In case improper

operation is indicated,

make a necessary switch adjustment or replace the defective switch.

See adjustment

procedure on

page 21.

VARI-SWITCH

TEST

The vari-switch is

activated by the

cam lever and cam. When

the

variable cooking

control is

set at “HIGH”

position,

the

cam is placed far away from

the

cam lever. In this

condition, the

vari-switch is turned ON

by action of

the cam

lever. The vari switch can be checked with an ohmmeter. When the meter leads

connected to

the common (COM) and normally open (NO) terminals

the switch, it should

indicate a closed

circuit

with the cam lever depressed and an open circuit with the cam lever released.

improper

operation is indicated,

replace the

vari-motor

assembly.

VARI-MOTOR

TEST

The

vari-motor rotates

two (2)

revolutions

per minute.

Check

240 volts is

present

between

the motor

terminals.

voltage is

present, but

the

motor

does not

turn,

replace the vari-motor assembly.

If no

voltage is present, check for loose or broken wire connections.

Page 17

TEST PROCEDURES (CONT’D)

PROCEDURE

LETTR

COMPONENT TEST

MONITOR SWITCH TEST

Before performing this test, make sure that the Upper and Lower Latch Switches

are operating properly

refer to the Test procedure I and J.

Connect one ohmmeter lead to one

the fuse terminals, and the

other

lead to the power transformer terminal to which the white wire from the wiring harness is connected. When the

door is

open, the meter should indicate a closed circuit.

When

the

switch

actuator of

the

upper latch

hook is pushed by the screw-driver through the upper latch hole on the

front plate of the

oven cavity with the

door

opened (in this

condition

the plunger of the

monitor

switch is pushed

in),

the

meter should

indicate an

open circuit.

In case

improper operation is indicated,

replace the defective switch.

POWER TRANSFORMER

4 ‘UPPER

CHAPTER IV

COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURES

WARNING:

to avoid possible

exposure t 0 microwave

‘d.

There is a broken door hinge or support.

energy;

The door gasket or seal is damaged.

A. Before operating the oven;

The door is bent or warped.

Make sure that unlatching the door slowly is accompanied by a click indicating actuation of the latch switches.

Check

visuaI.ly

the door seal for arcing and dam-

age.

Do not operate the oven until after repair if any of the follwing conditions exist;

1. Door does not close firmly against the front of appliance.

There is any defective parts in the interlock, oven door or microwave generating and transmission assembly.

There is any other visible damage to the oven.

Do ngt operate the oven;

Without the RF gasket.

If the waveguide and oven cavity are not intact.

If the door is not closed.

OUTER CASE REMOVAL

To remove the outer case, refer to Figure 6 and proceed as

follows:

Disconnect the oven power supply.

Remove the screws

from

the

rear

and along the side

edge of the case.

Slide the entire case back about

3cm

free

it from

retaining clips on the cavity face plate.

Lift the entire case from the unit.

CAUTION: DISCHARGE THE HIGH VOLTAGE

CAPA-

CITOR BEFORE TOUCHING ANY OVEN COMPONENTS OR WIRING.

Page 18

HIGH VOLTAGE COMPONENTS

REMOVAL

(High Voltage Capacitor, Rectifier and

Short

Protector)

To remove the components, proceed as follows.

1. Disconnect the oven from the power supply and remove the outer case.

2. Discharge the high voltage capacitor.

3. Disconnect the wire leads from the high voltage

capaci-

tor.

4. Remove the single (1) screw holding the capacitor holder to the mounting bracket, and remove the capacitor holder.

5. Now, the capacitor, rectifier and short protector are free.

CAUTION:

WHEN REPLACING THE RECTIFIER THE GROUND SIDE TERMINAL MUST

BE SECURED FIRMLY WITH A

EARTH-

ING SCREW.

POWER TRANSFORMER REMOVAL

1. Disconnect the oven power supply and remove the outer case.

2. Discharge the high voltage capacitor.

3. Disconnect the wire leads from the power transformer.

4. Disconnect the filament leads from the magnetron and high voltage capacitor.

5. Remove the two (2) screws holding the transformer to the base cabinet (A).

6. Remove the transformer.

OVEN LAMP REMOVAL

1. Disconnect the oven power supply.

2. Loosen the screw to open the lamp access cover, and then remove the oven lamp.

OVEN LAMP ACCESS COVER

REAR CABINET,

CORD HOLDER

-OUTER CASE CABINET

AINS

SUPPLY CORD

CORD ANCHORAGE (UPPER)

FUSE HOLDER

FOOT

SHORT PROTECTOR

AGE CAPACITOR

OR HOLDER

‘POWER TRANSFORMER

Figure 6.

Outer Case and Chassis Components

Page 19

_-_ _ _ -

TURNTABLE MOTOR REMOVAL

Disconnect the oven power supply.

5. Remove the four (4) screws holding the turntable motor

Remove the six (6) screws holding the base cabinet (B)

mounting plate to the oven cavity bottom.

to the oven cavity and rear cabinet.

6. Disconnect the wire leads from the turntable motor.

Shift the base cabinet (B) to the left to release the tab of

7. Remove the four (4) screws holding the turntable motor

the base cabinet (B) from the base cabinet (A).

to the mounting plate.

Remove the base cabinet (B).

The motor is now free.

TURNTABLE ROLLER REMOVAL

Disconnect the oven from power supply and remove the

outer case.

Turntable

Discharge the high voltage capacitor.

Remove the six (6) screws holding the base cabinet (B) to the oven cavity and rear cabinet. Remove the turntable roller cover. Pull off the turntable roller shaft.

.I,.

Re-mstanng

1. Set the turntable roller in place.

2. Insert the turntable roller shaft into the turntable roller through the hole.

’\Roller cover

Roller support

3. Carefully attached the roller cover, refer to Figure 7.

Figure 7. Turntable Roller Re-instalhng

FAN MOTOR REMOVAL

1. Disconnect the oven power supply and remove the outer case.

2. Discharge the high voltage capacitor.

(B) to hold the cooling duct (A).

6. Remove the duct (A) with the fan motor attached from the unit.

3. Disconnect the wire leads from the fan motor.

4. Remove the three (3) screws holding the chassis support to the rear cabinet, cooling duct (A) and control panel back plate.

5. Release the tab which is provided on the cooling duct

7. Remove the fan blade from the fan motor shaft by

pull-

ing the fan retainer clip.

8. Remove the two (2) screws and nuts holding the fan motor to the cooling duct (A). The fan motor is now free.

MAGNETRON ASSEMBLY REMOVAL

1. Disconnect the oven power supply and remove the outer case.

2. Discharge the high voltage capacitor.

3. Disconnect the wire leads from the magnetron assembly and the therm0 cut-out.

4. Release the tab which is provided on the cooling duct

(B) to hold the cooling duct (A).

5. Remove the two (2) screws holding the cooling duct

(B) to the magnetron.

6. Remove the cooling duct (B) from the unit.

7. Carefully loosen the four (4) mounting nuts holding the

magnetron assembly to the waveguide

while

supporting

the magnetron assembly from below.

8. Lower the magnetron assembly until the tube is clear of the waveguide.

9. Remove the therm0 cut-out and magnetron duct by loosening the mounting screws.

CAUTION:

WHEN REPLACING THE MAGNETRON, BE SURE THE R.F. GASKET IS IN PLACE AND MOUNTING NUTS ARE TIGHTENED SECURELY.

Page 20

UPPER LATCH SWITCH AND MONITOR SWITCH REMOVAL

Disconnect the oven from the power supply and remove

the outer case.

2. Discharge the high voltage capacitor.

3. Remove the complete control panel assembly, referring to the Control Panel Assembly and Component

Re-

moval.

4. Disconnect the wire leads from the switches.

5. Remove the single (1) screw and washer holding the upper latch hook to the oven cavity front flange.

6. Remove the upper latch hook from the flange by moving it downward.

7. To remove the switch from the upper latch hook, push outward the two (2) retaining tabs holding the switch in place.

LOWER LATCH SWITCH REMOVAL

1. Disconnect the oven from the power supply and remove

5. Remove the single (1) screw and washer holding the

the outer case.

lower latch hook to the oven cavity front flange.

2. Discharge the high voltage capacitor. 6. Remove the lower latch hook from the flange by moving

3. Remove the complete control panel assembly, referring

it downward.

to the Control Panel Assembly and Component

Re-

7. Push outward the two (2) retaining tabs holding the

moval.

switch in place.

4. Disconnect the wire leads from the switch.

8. The switch is now free.

HINGE PLATE

MOI

JNTI

STEAM DUCT

OVEN LAMP FILTER

ROLLER

SHAF

TRAY

LOWER LATC

TURNTABLE ROLLER COVER

TURNTABLE MOTOR

CHASSIS SUPPORT

Figure 8. Oven Cavity Components

Page 21

CONTROL

PANEL ASSEMBLY

AND COMPONENTS REMOVAL

The complete control panel should be removed for replacement of the components. To remove the control

panel, refer to Figure 9 and proceed as follows:

1. Disconnect the oven from the power supply and remove the outer case.

2. Discharge the high voltage capacitor.

3. Remove the one (1) screw holding the control panel to the chassis support.

4. Remove the two (2) screws holding the bottom edge of the control panel to the base cabinet (A).

5. Remove the one (1) screw holding the control panel to the oven cavity front flange.

6. Disconnect the wire leads of the main wire harness from the control panel components.

7. Pull the control panel forward.

Replacement of individual component is as follows:

VARI-MOTOR ASSEMBLY

1. Remove the mode select knob by pulling it off the

vari-

motor shaft,

2. Disconnect the wire leads from the vari-motor assembly.

3. Remove the three (3) screws holding the vari-motor assembly to the control panel back plate.

4. The vari-motor assembly is now free.

TIMER

Remove the timer knob assembly by pulling it off the

timer shaft.

2. Disconnect the wire leads from the timer motor.

3. Remove the two (2) screws holding the timer mounting plate to the control panel back plate.

4. Remove the three (3) screws holding the timer to the mounting plate.

5. The timer is now free. COOK SWITCH

Disconnect the wire leads from the cook switch.

2. Remove the one (1) screw holding the cook switch to the open device.

3. Remove the cook switch.

COOK LAMP

1. Disconnect the wire leads from the cook lamp.

2. Remove the one (1) screw holding the cook lamp to the back plate.

3. The cook lamp is now free.

CONTROL PANE

VARI-MOTOR

CONTROL PANEL BACK PLATE

TIMER KNOB ASSEMBLY

COOK LAMP MOUTING PLATE

COOK

INDICATO&-r~cs’

,-’ ,///A’

, COOK

’

LAMP

TIMER MOUTING PLATE

Figure 9. Control Panel and Components

Page 22

UPPER LATCH SWITCH, LOWER LATCH SWITCH AND

MONITOR SWITCH ADJUSTMENT

In case the upper and lower latch switches do not operate properly due to a misadjustment, the following adjustment should be taken.

1. Loosen the single (1) screw holding the upper latch hook to the oven cavity front flange and the single (1) screw holding the lower latch hook to the same flange.

2. With the door closed, adjust the lower latch hook by moving it back and forward, and then adjust the upper latch hook by moving it back and forward, or up and down.

In and out play of the door allowed by the upper and lower latch hooks should be less than OSmm. The vertical position of the upper latch hook should be placed where the upper latch switch has activated with the door closed. Vertical position of the lower latch hook is not able to adjust.

3. Secure the screws with washers firmly.

4. Now, make sure the upper latch switch operation. If the upper latch switch has not activated with the door closed, loosen the single (1) screw holding the upper latch hook to the oven cavity front flange and adjust the upper latch hook position.

After the adjustment, make sure of the following points:

1. The in and out play of the door remains less than

OSmm

at latched position.

First check the upper latch hook position, pushing and pulling the upper portion of door toward the oven face. Then check the lower latch hook position, pushing and pulling the lower portion of door toward the oven face. Both results (plays of the door) should be less than OSmm.

2. The upper before the

interrupt theand lower latch switches

door can be opened.

circuit

3. The monitor

opened

switch

contacts close when the door is

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

iatch

Head

Upper

Latch Switch

Latch

Switch

Figure 10. Latch Switches Adjustment

Page 23

DOOR REPLACEMENT AND ADJUSTMENT

DOOR REPLACEMENT

DOOR ADJUSTMENT

Disconnect the oven power supply, remove the outer case and discharge the high voltage capacitor.

Remove the four (4) screws holding the door hinge to the oven cavity.

The door assembly is now free from the oven cavity.

3. On reinstalling new door assembly, secure the door assembly with the four (4) mounting screws to the oven cavity. Make sure the door is parallel with the bottom line of the oven face plate and the latch heads pass through the latch holes correctly.

Note:

After any service to the door, an approved microwave survey meter should be used to assure in compliance with proper microwave radiation standards.

(Refer to Microwave Measurement Procedure.)

When removing and/or loosening hinge such as in the case of a door replacement, the following adjustment criteria are taken. Door is adjusted to meet the following three conditions by keeping screws of hinge loose.

1. Adjust door latch heads at a position where they smoothly catch the latch hooks through the latch holes. Refer to upper and lower latch switches adjustment.

2. Deviation of the door alignment from the horizontal line of the cavity face plate is to be less than 1 .Omm.

The door is positioned with its face depressed toward the cavity face plate.

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

OUTER CASE CABINET

[[

tI’

’ -.

\’

fsa

OVEN FACE PLATE

Figure 11. Door Assembly Replacement and Adjustment

Page 24

MICROWAVE MEASUREMENT

After the adjustment of the door interlock switches and door is 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 micro wave 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 THE TESTING:

Before beginning the actual test for leakage, proceed as

foIlows;

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

Recommended instruments are: NARDA 8 100 NARDA 8200 HOLADAY HI 1500 SIMPSON 380M

Place the turntable tray into the oven cavity.

3. Place the load of 275 rtl5ml of water with the addition of one (1) percent by weight of sodium chloride in solution initialy at 20

+5”C

in the centre of the over tray. The water container should be a low form of 600ml beaker with inside diameter of approx.

8.5cm

and made of an electrically nonconductive 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.

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 the cool salt water.

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

6. The microwave radiation emission should be measured at any point of

Scm

or more from the external

surface of the oven.

Page 25

240V-50Hz

CIRCUIT SUBJECT TO CHANGE WITHOUT NOTICE

WIRE COLOUR CODE SYMBOL

RED: RED

(L) WHT : WHITE

(N)

BRN: BROWN (LI BLU : BLUE

IN)

ORG: ORANGE(L) GRY : GRAY

(N)

PNK : PINK

(L)

GRE : GREEN

G-Y GREEN AND YELLOW STRIPE

0.75mm’

: HIGH- VOLTAGE WIRE

/I8 :

SECTIONAL AREA OF 0.75mm’

: NO INDICATION SHOWS

0.5mmz

: QUICK CONNECT TERMINAL

: SOLDER OR CLINCH TERMINAL

: CONNECTOR

SW, :

UPPER LATCH

SWITCH

WHT/l

FI :FUSE

MIOA

RED/18

L,,

Lz: OVEN LAMP

WHT

M, : FAN MOTOR

ORG/18

M2:

TURNTABLE MOTOR

ORG/18

\ GRywHT\~NIT~;WITCH~‘~~~

L3: COOK LAMP

mPNK

M,: VARI

MOTOR

RED

WHT

RN/18

T: POWER

TRANSFORMER

Fz: OVER CURRENT

PROTECTOR

MG: MAGNETRON

I-----

D: RECTIFIER

Figure 12. Schematic Diagram

Page 26

0. u

2 5:

v zm

nwn -

uu.0

ZII-

-1 z Y

-.--.A

-v,

(WI 1;

P 6

II:

‘I-

Page 27

PARTS LIST

REF. NO.

PART

NO.

DESCRIPTION

Q’TY

CODE

l- 1

QACCA0018WREO

QFS-CQOOlYBEO

QFSHD0019WREO

QSW-M0085WREO

QSWTE0148WREO

RLMPE0085WREO

QSW-M0088WREO

RLMPTOOZlWREO

QS&LOO55WREO

l-10

RMoTEOlOGWREO

l-11

RMOTEO081YBEO

l-12

RTHM-0017WREO

l-13

FV-MZOlOGWRKO

l-14

RC-QZ0076WREO

1-15

RH-DZO046WREO

l-16

RTRN-0173WREO

l-17

QTANN0031WREO

l-18

QSWTE0127WREO

l-19

RH-DZ0061WREO

FFTASOOl%JRYO

PPACUOOOlYBPO

PPACUOOOZYBPO

PCUSU0312WRPO

PCUSU0337WRPO

LANGQ0225WRWO

Z-10

LBSHC0032WREO

2-11

LSTPP0008YBFO

2-12

LSTPP0009YBFO

2-13

LANGQ0255WRWO

2-14

LBNDK0035WRPO

2-15

GLEGP0018WRFA

2-16

LHLDK0005YBFA

2-17

PCAS-0017WRFA

2-18

PSPAGQOOZYBEO

2-19

PC~VP0067YBzO

ELECTRICAL PARTS

Mains supply cord

Fuse

(MlOA)

Fuse holder

*Upper

latch switch, Lower latch switch

3 and monitor switch Vari-motor assembly

Cook lamp

Cook switch

Oven lamp

Oven lamp socket

2 Fan motor Turntable motor

1 Magnetron

therm0

cut-out

1 Magnetron

1 High voltage capacitor

1 Rectifier

Power tr nsformer

1 Cord

corm

1 Timer

Short protector

CABINET PARTS

AS AE AF AG

AH AF AH AW

BS AF AZ

Base cabinet (A) Base cabinet (B) Rear cabinet

Outer case cabinet Oven lamp access cover Oven lamp cushion (A)

Oven lamp cushion (B)

Shading-&ion

(A)

Shad&g

cushion (B)

Cord mounting bracket

Cord bushing

AB Cord anchorage (upper) Cord anchorage (lower) Capacitor mounting bracket Capacitor holder

Foot

Cord holder Plug case Vibration proof cushion Edge cover

CONTROL PANEL PARTS

3- 1 1 FPNLC0364WRYO 1

Control panel frame assembly

HPNLC0119WRFA

Control panel

HDECA0528WREA

Panel plate

3- 1c

HiNDP0026YBFA

Cook indicator

LCHSM0054WRWO

Control

panel

back

FLEVF0087WRKO

plate

Open device

3- 3A

PZETE0056WRPO

Cook switch insulator

JBTN-0071WRVC

Open button

Page 28

REF. NO.

PART NO.

DESCRIPTION

Q’TY

CODE

JBTN-0095WRMA

Cook

button

FKNBK0119WRKO

Mode

select knob

assembly

Y~~~(ccioG1c_Lhr\

FKNBKs29WRKO

Timer

knob assembly

l&-3&

LSUB-0117WRWO

Cook

lamp mounting plate

LANGQ0313WRWO

Timer

mounting

plate

3-10

PZETE0054WRPO

Cook

lamp insulator

OVEN PARTS

DGVN-0112WRTA

Open cavity assembly

NR?jLP0020WRlO

Turntable

roller

NSFTT0054WRWO

Roller shaft

PC&IP0204WREO Waveguide

cover

PCLiCQOOlYBEO

Clip

NTNT-0036WRFO

Turntable

tray

FCPL-0018WRK0

Turntable

coupling assembly

PFiLW0035WRPO Oven lamp

filter

FFANJ0017WRKO Fan blade

assembly

4- 9A

MSPRP0038YBEO

Fan retainer clip

4-10

LANGFO224WRPO

Chassis

support

4-11

LANGQ0186WRWO

Turntable

motor mounting plate

4-12

PSPAG0023WRFO

Motor

spacer

4-13

LANGK0140WRWO

Hinge

mounting plate

4-14

LANGQ0254WRwO

Oven lamp mounting plate

4-15

PDUC-0246WRF0

Magnetron cooling duct (A)

4-16

PDUC-0247WRF0

Magnetron cooling duct (B)

4-17

FDUC-OllGWRYO

Magnetron duct

4-17A

PCUSUO323WRPO

Magnetron

duFt

cushion

4-18

PCUSU0242YBPO

Cooling duct" cushion

4-19

PDUC-0242WRwO

Steam duct

4-20

PCUSUO298wRPO

Steam cushion

4-21

LANGK0141WRFO

Upper

latch hook

4-22

LANGK0142WRFO Lower latch hook

4-23

MLEVFOl24WREO Actuator

4-24

PCOvP0265WRFO

Turntable

roller cover

DOOR PARTS

DDERF0159WRKO

Door assembly, complete

FANGK0066WRYO

Latch

plate

;

FLEVF0050WRYO

Joint lever

LSTPP0035WRFO

Upper latch head

LSTPP0036WRFO

Lower latch head

MLEVPO031WRFO

Door lever

spring

MSPRT0059WREO

Latch

PC%IP0205WRFC

Latch cover

LX-BZ0143WREO

Screw (torx); latch

cover mtg

‘\

MISCELLANEOUS

QW-HZ0059WREO

High voltage

wire

(Trans.-Capa.)

QW-HZ0060WREO

High voltage

wire

(Mag.

-Capa.)

QW-VZ0660WREO

Fuse

wire

QW-VZ0641WREO

Earth wire

Page 29

REF. NO.

PART

NO.

DESCRIPTION O’TY

CODE

FW-VZ0501WREO

Panel harness

FW-VZ0500WREO

Wire harness

TCADCO22OWRRO

Cook book

TiNSE0232WRRO Use and care

SCREWS, NUTS AND WASHERS

LX-BZ0141WREO

Screw; actuator mtg

LX-BZO155WREO

Screw; lamp access cover

mtg

XBPSD40P06KOO

Screw;

XBPSDGOP14KSO

turntable coupling mtg

AA Screw;

power transformer mtg

XBSSD40PlZOOO

Screw;

hinge mounting plate mtg

XBTUW40P08000

Screw;

turntable motor mounting plate

mtg

XFPSD30P06000

Screw; magnetron

therm0

cut-out

mtg

XCPSD40P27000

Screw; cord anchorage mtg

XNESD40-32000

Nut;

earthing

7-10

LX-NZ0031YBEO

7-11

Nut; lamp access cover mtg

LX-NZ0048WREO

Nut; magnetron mtg

7-12

LX-WZ0034WREO

7-13

LX-CZ0052WREO

Washer (square); outer case mtg

Washer (outer tooth); upper latch hook

and lower latch

7-14

XWHSD50-08000

hook mtg

Washer;

7-15

actuator mtg

XWWSD60-08000

Washer (outer tooth); power transformer

l-Q

7-16

LX-BZ0186WREO

Screw;

Rectifier cord mounting bracket

and magnetron cooling duct (B)

7-17

LX-CZ0047WREO

Screw;

7-18

control panel frame assembly mtg

XCPSD30P06000

Screw;

cook lamp mounting plate and

cook lamp mtg

7-19

xCPSD40P12000

Screw;

control panel back plate mtg

7-20

XCTSD40P08000

Screw;

timer mounting plate and open

device mtg

7-21

XCPSD30P08000

Screw; timer mtg

7-22

LX-CZ0035WREO

Screw;

7-23

vari-motor assembly mtg

XWHSD40-08120

Washer;

timer mounting plate mtg

Page 30

Page 31

Page 32

Page 33

DOOR ASSEMBLY

‘\

_% \

MISCELLANEOUS

6-4

6-5

Page 34

FIXING PROCEDURE OF CORD ANCHORAGE

General :

Content:

As for the above subject, sometime it may cause to have wrong fixing about two pieces of cord anchorage unit. But this cord anchorage is an important part for the safety, therefore it must be fixed correctly and firmly.

1. The cord anchorage which is used to secure the mains supply cord can be fixed in two different ways.

2. if you fix them as shown in Figure 2, the mains supply cord will not be secured firmly.

3. Therefore. make sure to fix them as shown in figure 1.

n 6%

MAINS

v SUPPLY CORD

LSTPP0009Y EFO

CORD ANCHORAGE

/’ (LOWERI

--4

CORDANCHORAGE

(UPPER) LSTPP0008YBFO

Figure 1. Correct Fixing

Figure 2. Wrong Fixing

.3 mm