Sharp R-530BW Service manual

SHARF?

R-590BK

R-590BW

SERVICE MANUAL

S68M116R590BE

MICROWAVE OVEN MODELS

R-590BKlR-590BW

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

WARNING TO SERVICE PERSONNEL: Microwave ovens contain circuitry capable of producing very high voltage and current. Contact with the following parts may result in a severe, possibly fatal electrical shock.(High Voltage Capacitor,

High Voltage Power Transformer, Magnetron,

High Voltage Rectifier Assembly, High Voltage

Harness etc..)

TABLE OF CONTENTS

SECTION

PRECAUTIONS TO BE OBSERVED BEFORE AND DURING SERVICE TO

AVOID POSSIBLE EXPOSURE TO EXCESSIVE MICROWAVE ENERGY. ...........

Before Servicing .............................................................

Warning to Service Personnel .................................................................

Foreword and Warning .......................................................................

Specifications ...............................................................................

Generallnformation .........................................................................

Key Unit Layout .............................................................................

Operation ..................................................................................

Servicing and Troubleshooting Guide ..........................................................

TestProcedures ............................................................................

TouchControlOutline .......................................................................

Component Replacement and Adjustment Procedure ...........................................

Microwave Measurement Procedure ..........................................................

Wiring/Schematic Diagram ..................................................................

Parts .....................................................................................

Packing and Accessories ....................................................................

PAGE

Inside Front Cover

Inside Front Cover

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SHARP ELECTRONICS CORPORATION

Service Headquarters: Sharp Plaza, Mahwah, New Jersey, 07430-2135

R-590BK

R-590BW

Do not operate or allow the oven to be operated with the door open.

(b) Make the following safety checks on all ovens to be serviced before activating the magnetron or other microwave source, and make repairs as necessary: (1) Interlock operation, (2) proper door closing, (3) seal and sealing surfaces (arcing, wear, and other damage), (4) damage to or loosening of hinges and latches, (5) evidence of dropping or abuse.

(4

Before turning on microwave power for any service test or inspection within the microwave generating compartments, check the magnetron, waveguide or transmission line, and cavity for proper alignment, integrity, and connections.

Any defective or misadjusted components in the interlock, monitor, door seal, and microwave generation and transmission systems shall be repaired, replaced, or adjusted by procedures described in this manual before the oven is released to the owner.

A microwave leakage check to verify compliance with the Federal Performance Standard should be performed on each oven prior to releasing the oven to the owner.

(RD21101 U)

Before servicing an operative unit, perform a microwave emission check as per the Microwave

Measurement Procedure outlined in this service manual. If microwave emissions level is in excess of the specified limit, contact SHARP ELECTRONICS CORPORATION

I-800-237-4277. immediately @

If the unit operates with the door open, service person should 1) tell the user not to operate the oven and 2) contact SHARP ELECTRONICS CORPORATION and DHHS immediately.

Service personnel should inform SHARP ELECTRONICS CORPORATION of any certified unit found with emissions in excess of 4mW/cm2. The owner of the unit should be instructed not to use the unit until the oven has been brought into compliance.

(RD81001 U)

SERVICE MANUAL

Microwave Ovens

R=590BK/R=590BW

Foreword

This manual has been prepared to provide Sharp

Electronics Corporation personnel with complete operation and service information for Sharp microwave oven models R-590BWR-590BW.

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

Check interlock switches and the door seal carefully.

Special attention must be given to avoid electrical shock and microwave radiation hazards.

< .

,

WARNING

Never operate the oven until the following points are en- sured:

(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 are no other visible signs of damage to the oven.

DANGER

Certain initial parts are intentionally not grounded and present a risk of electrical shock only during servicing. Service personnel - Do not contact the following parts while the appliance is energized;

High Voltage Capacitor, Power Transformer, Magne- tron, High Voltage Rectifier Assembly and High voltage Harness.

If provided, Vent Hood, Fan Assembly and Cooling

Fan motor.

All of the parts marked “*” on parts list are used at voltages more than 25OV.

Removal of the outer case cabinet gives access to voltage above 25OV.

All of the parts marked “A” on parts list may cause undue microwave exposure, by themselves, or when they are damaged, loosened or removed.

Sharp Electronics Corporation

Sharp Plaza

Mahwah, New Jersey 07430-2135

1

Specifications

General Information

Troubleshooting /

Test Procedures

Microwave Measurement

Wiring / Schematic Diagram

m

R-590BK

R-590BW

R-590BK

R-590BW

WARNING TO SERVICE PERSONNEL

Microwave ovens contain circuitry capable of producing very high voltage and current. Con- tact with following parts may result in a severe, possibly fatal, electrical shock.

(EXAMPLE)

High Voltage Capacitor, High Voltage Power

Transformer, Magnetron, High Voltage Rectifier

Assembly, High Voltage Harness etc..

Read the Service Manual carefully and follow all instructions.

oltage

Before Servicing

1. Disconnect the power supply cord and then remove outer case

2. Open the door and block it open.

3. Discharge the high voltage capacitor.

WARNlNG:RlSK OF ELECTRICAL SHOCK. DISCHARGE

THE HIGH VOLTAGE CAPACITOR BEFORE SERVICING.

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

Whenever troubleshooting is performed, the power supply must be disconnected. In some cases it may be necessary to connect the power supply after the outer case has been removed, in this event:

1 .

2 .

3 .

4 .

5 .

6 l

Disconnect the power supply cord, and then remove outer case cabinet.

Open the door and block it open.

Discharge the high voltage capacitor.

Disconnect the leads to the primary of the power transformer.

Ensure that the leads remain isolated from other components and oven chassis by using insulation tape.

After the above procedure, reconnect the power supply cord.

When the testing is completed

1. Disconnect the power supply cord and then remove outer case cabinet.



4. Reconnect the leads to the primary of the power transformer.

5. Re-install the outer case cabinet.

6. Reconnect the power supply cord after the outer case cabinet is installed.

7. Start the oven and check all functions.

After repairing

1. Reconnect all leads removed from components during testing.

2. Re-install the outer case (cabinet).

3. Reconnect the power supply cord after the outer case is installed.


5. Run the oven and check all functions.

Microwave ovens should not be operated 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 to HIGH and set the microwave timer for two (2) minutes. When the two minutes has elapsed (timer at zero), carefully check to see if the water is hot. If the water remains cold, carry out

Before

Servicing

procedure and re-examine the connection to the component being tested.

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

2

Item

Power Requirements

Power Output

Case Dimensions

Cooking Cavity

1.8 Cu.Ft.

Control Complement

Oven Cavity Light

Safety Standard

Description

120 Volts

14.0 Amperes

1650 Watts

60 Hertz

Single phase, 3 wire grounded

1100 watts (IEC-705 Test Procedure)

Operating frequency of 2450 MHz

Width 23.94”

Height 13.27” (including feet)

Depth 19”

Width 17”

Height 9.96”

Depth 17.8”

Tray Size 16” Diameter

Touch Control System

Clock (I:00 - 1259)

Timer (0 - 99 min. 99 sec.)

Microwave Power for variable cooking

Repetition Rate;

P-HI (HIGH) . . . . . . . . . Full power throughout the cooking time

P-90 . . . , . . . . . . . . . . . . . approx. 90% of full power

P-80 . . . . . . . . . . . . . . . . . approx. 80% of full power

P-70 (MED HIGH) . . . . approx. 70% of full power

P-60 , . . . . . . . . . . . . . . . . approx. 60% of full power

P-50 (MED) . . . . . . . . . . approx. 50% of full power


P-30 (MED LOW) . . . . . approx. 30% of full power


P-IO . . . . . . . . . . . . . . . . . approx. 10% of full power

P-O . . . . . . . . . . . . . . . . . . . No power throughout the cooking time

FEATURES

Selection button

Page turn buttons

BOOK MARK button

INDEX button

POPCORN button

START/MINUTE button

Number button

Yes

UL Listed

FCC Authorized

DHHS Rules, CFR, Title 21, Chapter 1, Subchapter J

3

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R-590BK

R-590BW

R-590BK

R-590BW

Grounding Instructions

This oven must be fully grounded at all times. This appliance must be connected to a 120 volt, 60 Hz, AC only, 15 Ampere or more fused electrical supply. It is recommended- that a separate circuit serving only this appliance be provided. When installing this appliance, observe all applicable codes and ordinances.

WARNING: Improper use of the grounding plug can result in a risk of electric shock.

Where a two-pronged wall-receptacle is encountered, it is the personal responsibility and obligation of the customer to contact a qualified electrician and have it replaced with a properly polarized and grounded three- pronged wall receptacle or use a grounding adaptor. If an extension cord must be used, it should be a 3-wire,

15 ampere minimum cord.

Grounded

Receptacle Box

3 Pronged Plug

\

Grounding Pin

3 Pronged Receptacle

Grounding

Receptacle

Grounded

Receptacle Box

\

Screw c-

I

Tab for

Grounding Screw

Do not under any circumstances cut or remove the round grounding prong from this plug.

Oven Diagram

1. Digital display

2. Auto-Touch control panel

3. Door open button

4. Door latches

5. Removable turntable support

6. Removable turntable

7. Oven lamp

8. Oven door with see through window

9. Waveguide cover

10. Power Cord

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R-590BK

R-590BW

Touch Control Panel

Time of day and date

During setting “Reminder “, this mark is displayed

1

Big LCD display

---I

Reminder mark:

Page turn button:

When forward/ Rewind/ Return arrows are displayed on the screen, you can turn pages by pressing these buttons

BOOK MARK button

--I-

POPCORN button

STOP/CLEAR button

POPCORN MINUTE PLUS

Selection button: When the selection arrow are displayed on the screen, you can select pressing these buttons.

-.Foreword/Rewind/Return arrows:

Foreword arrows-Go to next screen (1 page turn

Rewind arrows-Go back to screen (1 page back)

Return arrows-Go back to screen

INDEX button

START/MINUTE PLUS button

DOOR OPEN button

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R-590BK

R-590BW

OPERATION

Description of Operating Sequence

The following is a description of component functions feed-box and into the cavity where the food is during oven operation:

Off Condition

Closing the door activates the door sensing switch and

5 . cooked.

Upon completion of the cooking cycle, the power transformer, oven lamp and cooling fan are turned off secondary interlock switch. In this condition, the monitor switch contacts are opened. When the oven is plugged in, 120 volts AC is supplied to the control unit

(see schematic diagram).

1. The display will show “VIEW VIDEO DEMO“ and

“SET THE CLOCK“.

6 . and the generation of microwave energy is termi- nated.

When the door is opened during a cook cycle, the monitor switch, door sensing switch, secondary interlock switch and primary interlock relay are activated with the following results. The turntable motor,

(For details, see table below.)

2.

Select ”

SET THE CLOCK“

referring to the operation manual.


NOTE: If any buttons are not touched for 30 seconds, the display will go on to the Video Dimo mode. To can- cel the video Demo mode, touch the STOP / CLEAR button and then set the clock.

7 . cooling fan motor and the high voltage components are de-energized. The oven lamp remains on and the digital readout displays the time still remaining in the cook cycle when the door was opened.

The monitor switch is electrically monitoring the operation of the secondary interlock switch and primary interlock relay and is mechanically associated with the door so that it functions as follows:

3. The display will show the home page after setting the clock.

When the door opens from a closed position, the secondary interlock switch and primary interlock


4. The following is the example of the home page. in this example the time of the day is set to 4:50 p.m. on

May 23rd.

(b) . relay open their contacts, then the monitor switch contacts close.

When the door is closed from the open position, the monitor switch contacts first open and the contacts of the secondary interlock switch close. r

4:50PM MAY 23

COOK )

REHEAT )

DEFROST b

RESOURCE CENTER b

NOTE: Even if the clock is not set, the display will show home page by touching the STOP / CLEAR button within 30 seconds after unit is plugged in.

If the secondary interlock switch and the primary interlock relay contacts are closed when the door is opened, the monitor switch contacts form a short circuit through the monitor fuse, secondary interlock switch and primary interlock relay causing the monitor fuse to blow.

Power Level P-O to P-90 Cooking

When Variable Cooking Power is programmed, 120 volts AC is supplied to the power transformer intermit- tently through the contacts of relay RY-2 which is operated by the control unit within a 32 second time base. Mi- crowave power operation is as follows:

Cooking Condition

Program desired cooking time and Variable Cooking

Control by touching the NUMBER pads and the Power

Level pad of the Variable Cooking Control. When

START is touched, the following operations occur:

1 . The relay contacts are closed and components connected to the relays (RY-1 and RY-2) are turned on.


Vari-Mode

(100% power)

(approx. 90% power)

(approx. 80% power)

(approx. 70% power)

On Time

32 sec.

30 sec.

26 sec.

24 sec.

Off Time

0 sec.

2 sec.

6 sec.

8 sec.

22 sec. IO sec. ~~ I

Relay

RY-1

Components

Oven Lamp/Turntable Motor/Fan Motor

1 (approx. 50% power) 18 sec. 14 sec.

1 RY-2

( (approx. 40% power) 16 sec. 16 sec.

( (approx. 30% power) / 12 sec. ( 20 sec.

2 .

3 .

4.

120 volts AC is supplied to the primary winding of the power transformer and is converted to approximately 3.4 volts AC on the filament winding and approximately 2400 volts

AC

on the high voltage winding.

The filament winding voltage heats the magnetron filament and the high voltage is sent to a voltage dou- bler circuit.

The microwave energy produced by the magnetron is channeled through the waveguide into the cavity

( (approx. 20% power)

1 (approx. 10% power)

1 (approx. 0% power)

8 sec.

6 sec. j 0 sec.

24 sec.

26 sec.

I32 sec.

~ I

The ON/OFF time ratio does not correspond with the percentage of microwave power, because approximately 2 seconds are needed for heating the magnetron filament.

6

OPERATION

DESCRIPTION OF OPERATING SEQUENCE

’

The following is a description of component functions during oven operation.

Sensor Cooking Condition

When using the Sensor Cooking function (Sensor Cook- ing , the foods are cooked without figuring time, power level or quantity. When the oven senses enough steam from the food, it relays the information to its micropro- cessor which will calculate the remaining cooking time and the power level needed for best results.

When the food is cooked, water vapor is developed. The sensor “senses” the vapor and its resistance increases gradually. When the resistance reaches the value set according to the menu, supplementary cooking is started.

The time of supplementary cooking is determined by ex- periment with each food category and is inputted into the

LSI

The following is an example of how the AH Sensor

Works: s

1. Soup at room temperature

Vapor is emitted very slowly.

2. Heated Soup. Moisture and humidity is emitted rap- idly. You can smell the aroma as it cooks.

3. Sensor detects moisture and humidity and calcu- lates cooking time and variable power level.

Cooking Sequence

1. Touch REHEAT

.

Note:

The oven should not be operated in either mode immediately after plugging in the unit. Wait five minutes before cooking in sensor mode.

2 .

3 .

The coil to the shut off relay (RY-1) is energized, the oven lamp, turntable motor and cooling fan motor are turned on and the power transformer remains off.

After about 16 seconds, the cook relay (RY-2) is energized. The power transformer is turned on, microwave energy is produced and first stage cooking is started.

Note:

The 16 second delay is for cooling time required to remove any vapor from the oven cavity and sensor. During this first stage, do not open the oven door or touch the STOP/CLEAR pad.

4 .

5 .

6 .

When the sensor detects the vapor emitted from the food, the display switches over the remaining cooking time and the timer counts down to zero.

At this time, the door may be opened to stir food, turn it or season, etc.

When the timer reaches zero, an audible signal sounds. The shut-off relay and cook relay are de-energized and the power transformer, oven lamp, etc. are turned off.

By opening the door or touching the STOP/CLEAR pad, the time of day will re-appear on the display and the oven will revert to an OFF condition.

7

R-590BK

R-590BW

R-590BK

R-590BW

DESCRIPTION AND FUNCTION OF COMPONENTS

Cooling Fan Motor

The cooling fan motor drives a blade which draws external cool air. This cool air is directed through the air vanes surrounding the magnetron to cool the magnetron. This air is channeled through the oven cavity to remove steam and vapors given off from the heating foods. It is then exhausted through exhaust vents in the oven cavity.

Oven Temperature Fuse

The oven temperature fuse located on the top of the oven cavity is designed to prevent damage to the unit 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 oven temperature fuse remains closed. However, when abnormally high temperatures are reached within the oven cavity, the fuse will open at 144OC, causing the oven to shut down.

Note:

This is a fuse and it does not reset.

Magnetron Temperature Fuse

The magnetron temperature fuse located on top of the magnetron duct is designed to prevent damage to the magnetron if an over heated condition develops in the tube due to cooling fan failure, obstructed air ducts, dirty or blocked air intake, etc.

Under normal operation, the magnetron temperature fuse remains closed. However, when abnormally high temperatures are reached within the magnetron the fuse will open at 144OC, causing the oven to shut down.

Note:

This is a fuse and it does not reset.

Door Open Mechanism

The door is opened by pushing the open button on the control panel.

When the open button is pushed, the open button pushes up the switch lever, and then the switch lever pushes up the latch heads.

The latch heads are moved upward and released from the latch hook. Now the door will open.

Door Sensing

I

Secondary Interlock

Switches

The secondary interlock switch is mounted in the lower position of the latch hook and the door sensing switch in the primary interlock system is mounted in the upper position of the 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 lamp. A cook cycle cannot take place until the door is firmly closed thereby activating both interlock switches. The primary interlock system consists of the door sensing switch and the primary interlock relay located on the control panel circuit board.

Monitor Switch

The monitor switch is activated (the contacts opened) by the latch head on the door while the door is closed. The switch is intended to render the oven inoperative by means of blowing the monitor fuse when the contacts of the primary interlock relay and secondary interlock switch fail to open when the door is opened.

Monitor Switch Functions

1. When the door is opened, the monitor switch contacts close (to the ON condition) due to their being normally closed. At this time the primary interlock

2 . relay and secondary interlock switch are in the OFF condition (contacts open) due to their being normally open contacts.

When the door is closed, the monitor switch contacts are first opened and then the door sensing switch and the secondary interlock switch contacts close.

Note:

When opening the door, each of these switches operate inversely.

3 . If the door is opened and the primary interlock relay and secondary interlock switch contacts fail to open, the monitor fuse blows simultaneously with closing of the monitor switch contacts.

Before replacing a blown monitor fuse, test the prima- 1 ry interlock relay, door sensing switch, monitor switch 1 and secondary interlock switch for proper operation.

(Refer to section “Test Procedures”.)

Latch

Heads

,

/

Door Sensing

Switch

Fuse

Block

Secondary

Interlock

Switch

NOTE:

MONITOR FUSE AND MONITOR SWITCH

ARE REPLACED AS AN ASSEMBLY.

R-590BK

R-590BW

SERVICING

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.

Before replacing a blown monitor fuse, test the door sensing switch, primary interlock relay, secondary interlock switch and monitor switch for proper operation. (Refer to “Test Procedure” section.)

Whenever troubleshooting is performed, the power supply must be disconnected. In some cases it may be necessary to connect the power supply after the outer case cabinet has been removed. In this event,

1. Disconnect the power supply cord, and then remove outer case cabinet.



4. Disconnect the leads to the primary of the power transformer.

5. Ensure that the leads remain isolated from other components and oven chassis by using insulated tape.

6. After the above procedure install the outer case cabinet and reconnect the power supply cord.

When the testing is completed

1. Disconnect the power supply cord, and then remove outer case



4. Reconnect the leads to the primary of the power transformer.

5. Re-install the outer case (cabinet).



Troubleshooting Guide

Off Condition

Problem Possible Cause Test Procedure

Home fuse blows when power cord is Shorted power cord or wire harness Check or replace plugged into the wall receptacle.

Monitor fuse blows when power is ap- Shorted power cord or wire harness Check or replace plied.

Secondary interlock or monitor Procedure E switch

Display does not illuminate power cord is plugged in. when Shorted or open wiring

Monitor switch or monitor fuse

Check or replace

Procedure E

Oven temperature fuse

Control unit

Procedure F

Procedure G

Display does not operate properly Primary interlock relay or door sens- Procedure E when touched.

STOP/CLEAR button is ing switch

Control unit Procedure G

Key unit unit Procedure K

Oven lamp does not light with door Shorted or open wiring opened.

Monitor fuse

Check or replace

Procedure E

Oven temperature fuse Procedure F

Oven lamp or socket Check or replace

Control unit Procedure G

Relay (RYI) Procedure H

9

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R-590BK

R-590BW

Troubleshooting Guide

Problem

3ven lamp does not light at all.

[>ven lamp lights, but fan motor and turntable motor do not operate.

Dven does not go into cook cycle

Nhen START button is touched.

&en seems to be operating but little or no heat is produced in oven road. (incompletely cooked or not zooked at all at the end of cook cycle.)

Oven goes into a cook cycle but extremely uneven heating is produced in oven load (food).

Cook Condition

Possible Cause

Shorted or open wiring

Oven lamp or socket

Control unit


Cooling fan motor

Turntable motor


Primary interlock system

Monitor fuse

Magnetron or oven temperature fuse

Relay (RYl)


Magnetron

Power transformer

Rectifier assembly

H.V. capacitor

Primary interlock system


Turntable motor

Low voltage

Dirty oven cavity

Wrong operation

Shorted or open wiring Oven does not cook properly when programmed for Cooking Power

P-50 (MED.) mode. (Operates properly on Cooking Power P-HI

(HIGH) mode.)

Oven goes into COMPU DEFROST but food is not defrosted well

Control unit

Magnetron

Wrong operation

Low voltage

Dirty oven check

Compu Defrost

Control Unit The oven is in the sensor cooking condition but AH sensor does not end or AH sensor turns off about a maximum of 30 minutes after start.

When a cup of water is heated by sensor, the oven does not shut off when the water is boiling.

AH Sensor

Procedure G

Procedure A

1 Check

Check

Check

Procedure J

Procedure G

Procedure L

Test Procedure

Check or replace

Check or replace

Procedure G

/ Check or replace

Check or replace

Check or replace

Check or replace

Procedure E

Procedure E

Procedure F

Procedure H

Check or replace

Procedure A

Procedure B j Procedure C

Procedure D

Procedure E

Check or replace

1 Check or replace

1 Check

1 Check

Check

Check or replace

10

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R-590BK

R-590BW

TEST PROCEDURES

Procedure Letter

A.

B.

Magnetron Assembly Test

Component Test

1. Disconnect the power supply cord, and then remove outercase cabinet.



4. 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 1Q.

5. To test for a shorted magnetron, connect the ohmmeter leads between the magnetron filament leads and chassis ground. This test should indicate an infinite resistance. If there is little or no resistance, the magnetron is grounded (shorted) and must be replaced.

6. Reconnect all leads removed from components during testing.

7. Re-install the outercase cabinet.

8. Reconnect the power supply cord after installing the outer case cabinet.


MICROWAVE OUTPUT POWER

The following test procedure should be carried out with the microwave oven in a fully assembeled condition (outer case fitted).

HIGH VOLTAGES ARE PRESENT DURING THE COOK CYCLE, SO EXTREME CAUTION

SHOULD BE OBSERVED

Power output of the magnetron can be measured by performing a water temperature rise test. This test should only be used if above tests do not indicate a faulty magnetron and there is no defect in the following components or wiring: high voltage rectifier, high voltage capacitor and power transformer. This test will require a 16 oz. (453~~) measuring cup and an accurate mercury thermometer or thermocouple type temperature tester. For accurate results, the following procedure must be followed:

1 .

2 .

3 .

4.

Fill the measuring cup with 16 oz. (453~~) of tap water and measure the temperature of the water with a thermometer or thermocouple temperature tester. Stir the thermometer or thermocouple through the water until the temperature stabilizes. Record the temperature of the water.

Place the cup of water in the oven. Operate oven on HIGH selecting 62 seconds cook time. Allow the water to heat.

Remove the cup from the oven and again measure the temperature, making sure to stir the thermometer or thermocouple through the water until the maximum temperature is recorded.

Subtract the cold water temperature from the hot water temperature. The normal result should be 38Oto 78OF (21 O to 42.6OC) rise in temperature. If the water temperatures are accurately measured and are tested for the required time period the test results will indicate if the magnetron tube has low power output (low rise in water temperature) which would extend cooking time or high power output (high rise in water temperature) which would reduce cook time. Because cooking time can be adjusted to compensate for power output, the magnetron tube assembly should be replaced only if the water temperature rise test indicates a power output well beyond the normal limits. The test is only accurate if the power supply line voltage is 120 volts and the oven cavity is clean.

Power Transformer

1 . Disconnect the power supply cord, and then remove outer case cabinet.

2 . Open the door and block it open.

3 . Discharge the high voltage capacitor.

4 . Disconnect the primary input terminals and measure the resistance of the transformer with an ohmmeter. Check for continuity of the coils with an ohmmeter. On the R X 1 scale, the resistance of the primary coil should be less than 1 &I and the resistance of the high voltage coil should be approximately 1OOQ; the resistance of the filament coil should be less than IQ.

5 . Reconnect all leads removed from components during testing.

6 . Re-install the outercase cabinet.

7 . Reconnect the power supply cord after installing the outer case cabinet.

8 . Run the oven and check all functions.

Note: High voltages are present at the high voltage terminal, so do not attempt to measure the filament and high voltage.

11

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R-590BK

R-590BW

Procedure Letter c.

Component Test

High Voltage Rectifier Test

1 . Disconnect the power supply cord, and then remove outer case cabinet. across the terminals and observe, reverse the leads to the rectifier terminals and observe meter reading. If a short is indicated in both directions, or if an infinite resistance is read in both directions, the rectifier is probably defective and should be replaced.

D

.

E.

Note: Be sure to use an Ohm-Meter that will supply a forward bias voltage of more than 6.30 Volts.

High Voltage Capacitor Test

(Discharge the high voltage capacitor before touching any oven components or wiring.)

1. Disconnect the power supply cord, and then remove outercase.

2. Open the door and block it open,


4 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 terminal using an ohmmeter.

Checking with a high ohm scale, if the high voltage capacitor is normal, the meter will indicate continuity initially and once the capacitor is charged an open circuit.

If the above is not the case, check the capacitor with an ohmmeter to see if it is shorted between each terminal and case. If it is shorted, replace the capacitor.


6. Re-install the outercase (cabinet).



Secondary Interlock Switch Test




4 Isolate the switch and connect the ohmmeter to the common (COM) and normally open (NO) terminal of the switch. The meter should indicate an open circuit with the door open and a closed circuit with the door closed. If improper operation is indicated, replace the secondary interlock switch.





Primary Interlock System Test

Door Sensing Switch




4. Isolate the switch and connect the ohmmeter to the common (COM) and normally open (NO) terminal of the switch. The meter should indicate an open circuit with the door open and a closed circuit with the door closed. If improper operation is indicated, replace the door sensing switch.





.

12

R-590BK

R-590BW

TEST PROCEDURES

-.

/ ,

I

. : i


E.

Component Test

Continued

Primary Interlock Relay (RY-2)

1

2:

Disconnect the power supply cord, and then remove outer case cabinet.


3 .

4 .


Disconnect two (2) wire leads from the relay on the printed circuit board in the control panel assembly. The relay is located on the bottom portion of the circuit board on the backside of the control panel assembly. Connect an ohmmeter to the male terminals and observe the meter reading. The relay contacts should be open. If the relay contacts are closed, replace the primary interlock relay or the circuit board.

Reconnect all leads removed from components during testing.



Monitor Switch Test




4 Disconnect the oven from the power supply.

Before performing this test, make sure that the secondary interlock switch and primary interlock relay are operating properly referring to the above Switch Test Procedure.

Disconnect the wire lead from the monitor switch (NC) terminal.

Check the monitor switch operation by using the ohmmeter as follows:

When the door is open, the meter should indicate a closed circuit.

With the door open, take a screw driver and push in the monitor switch actuator located through the lower latch hole on the faceplate of the cavity. The meter should indicate a open circuit.

If improper operation is indicated, the monitor switch may be defective and should be replaced.

After testing the monitor switch, re-connect the wire lead to the monitor switch (NC) terminal and check continuity of the monitor circuit.





WhiteWires

Connected to

Common Terminal

Monitor Switch

13

R-590BK

R-590BW


E

.

Continued

Component Test

Open Monitor Fuse




4 If the monitor fuse is open, perform the tests for the primary interlock system, secondary interlock switch and the monitor switch according to the procedure outlined in this section. Adjust or replace the secondary interlock and door sensing switches.

F

m

G .





Temperature Fuses



3 l


4 . A continuity check across either of the temperature fuse terminals should indicate a closed circuit unless the temperature of the magnetron temperature fuse reaches 121 *C or the oven cavity fuse reaches 152OC. An open magnetron temperature fuse indicates overheating of the magnetron assembly while an open oven fuse indicates overheating of the oven cavity. If a temperature fuse indicates an open circuit, exchange that temperature fuse and check for a restricted air duct, restricted air flow to the magnetron and oven cavity through the vent holes of the oven cavity, espe- cially the air duct and cooling fan assembly.

Reconnect all leads removed from components during testing.

R’

? Reconnect the power supply cord after installing the outer case cabinet.


Touch Control Panel Assembly Test

The touch control panel consists of circuits including semiconductors such as LSI, KS, etc. There- fore, unlike conventional microwave ovens, proper maintenance can not be performed with only a voltmeter and ohmmeter. In this service manual, the touch control panel assembly is divided into two units, Control Unit and Switch Unit, and also the Control Unit is divided into two units, Display Unit and Power Unit. Troubleshooting by unit replacement is described according to the symptoms indicated.

Before testing




4 . Disconnect the leads to the primary of the power transformer.

5 . Ensure that these leads remain isolated from other components and oven chassis by using insulated tape.

6 , After that procedure, re-connect the power supply cord.

14

R-590BK

R-590BW

TEST PROCEDURES


G.

Continued

Component Test

Touch Control Panel Assembly Test

1. Switch Unit

1. Disconnect the power supply cord, and then remove outer case cabinet



4. Check unit ribbon connection before replacement.





The following symptoms indicate a defective key unit. Replace the key unit. a) When touching the pads, a certain pad produces no signal at all. b) When touching a number pad, two figures or more are displayed. c) When touching the pads, sometimes a pad produces no signal.

If the Swich unit is defective.



4. Replace the switch unit.





2. Control Unit

The following symptoms indicate a defective control unit. Before replacing the control unit, perform the switch unit test (Procedure K) to determine if control unit is faulty.

2-1 In connection with pads. a) When touching the pads, a certain group of pads do not produce a signal. b) When touching the pads, no pads produce a signal.

2-2 In connection with indicators. a) At a certain digit, all or some segments do not light up. b) At a certain digit, brightness is low. c) Only one indicator does not light. d) The corresponding segments of all digits do not light up; or they continue to light up. e) Wrong figure appears. f) A certain group of indicators do not light up. g) All the segments of a digit flicker.

2-3 Other possible problems caused by defective control unit. a) Buzzer does not sound or continues to sound. b) Clock does not operate properly. c) Cooking is not possible.

When testing is completed,








15

R-590BK

R-590BW


H

.

Component Test

Relay Test


2 .


3 .


4 .

Disconnect the leads to the primary of the power transformer.

5 .

Ensure that the leads remain isolated from other components and oven chassis by using insulated tape.

6 .

After the above procedure , reconnect the power supply cord.

7 .

Checkvoltage between Pin No. 1 of the 2 pin connector (A) and the common terminal of the relay

RYl on the control unit with A.C. voltmeter. The meter should indicate 120 volts. If not, check oven circuit.

RY-1 and RY-2 Relay Test

These relays are operated by D.C. voltage.

Check voltage at the relay coil with a DC. voltmeter during the microwave cooking operation.

DC. voltage indicated . . . . . . . . . . . . . . . . . . . . . . Defective relay.

DC. voltage not indicated . . . . . . . . . . . . . . . . . . . Check diode which is connected to the relay

P coil. If diode is good, control unit is defective.

[ Relay Symbol

RY 1

RY2

1 Operational Voltage

Approx. 23.0 V DC

Aoorox. 22.0 V DC

/ Connected Components

Oven lamp/Turntable motor/Cooling fan motor

Power transformer

1.

8. Disconnect the power supply cord.






14.Run the oven and check all functions.

Foil pattern on the printed wiring board Test

To protect the electronic circuits, this model is provided with a fine foil pattern added to the primary on the PWB, which acts as a fuse.

1 Foil Pattern check and repairs




4. Follow the troubleshooting guide given below for repair.

Steps Occurrence

1

2

Only pattern at “a” is broken.

Pattern at “a” and “b” are broken

Cause or Correction

* Insert jumper wire Jl and solder.

* Insert the coil RCILF~ 0 O~YAZZ between “c” and “d”.

.

16

R-590BK

R-590BW

TEST PROCEDURES


1.

Component Test

Continued

Procedures to be taken when the foil pattern of the printed wiring board (PWB) is open

5. Make a visual inspection of the varistor burn damage and test the transformer with an ohmmeter for the presence of layer short-circuit

(check the primary coil resistance which is approximately 133 Q & 10%). If any abnormal condition is detected, replace the defective part(s).





2. Follow the troubleshooting guide given below. If indicator does not light up after above check and repairs are finished.




4. Disconnect the leads to the primary of the power transformer.

5. Ensure that the leads remain isolated from other components and oven chassis by using insulated tape.

6. After the above procedure, reconnect the power supply cord.

7. Follow the troubleshooting guide given below for repair.

Steps

1

2

Occurrence

The rated AC voltage is not present between

Pin No.1 of the 2-pin connector (A) and the common terminal of the relay RYI .

The rated AC voltage is present at primary side of low voltage transformer.

Cause or Correction

Check supply voltage and oven power cord

Low voltage transformer or secondary circuit defective. Check and repair.

8. Disconnect the power supply cord, and then remove the outer case.





13.Reconnect the power supply cord after the outer case cabinet is installed.

14.Run the oven and check all functions.

17

R-590BK

R-590BW


J. Compu Defrost Test

Component Test

1. Place one cup of water in the center of the turntable tray in the oven cavity.

2. Close the door, touch the ” DEFROST” button and select” STEAKS-CHOPS 1” button and touch

” DEFROST GO ON ” button and touch the number button “5”. And then touch the “START” button.

3. The oven is in “COMPU DEFROST” cooking function.

4. The oven will operate as follows:

K.

Weight

1

1st Stage

1

2nd Stage

/

3rd Stage

/ Level 1 Time 1 Level 1 Time 1 Level / Time

0.5 Lbs 1 60% I 42 sec. I 40% / 35 sec. I 30% I 15sec.

5.

If improper operation is indicated, the control unit is probably defective and should be checked.

Switch Unit Test




4 If the display fails to clear when the STOP/CLEAR button is depressed, first verify the lead wire harness is making good contact and verify that the door sensing switch operates properly (contacts are closed when the door is closed and open when the door is open).

If the door sensing switch is good, disconnect the lead wire harness that connects the key unit to the control unit and make sure the door sensing switch is closed (either close the door or short the door sensing switch connector). Use the switch unit matrix indicated on the switch unit circuit and place a jumper wire between the pins that correspond to the STOP/CLEAR button making momen- tary contact. If the display unit responds by clearing with a beep the switch unit is faulty and must be replaced. If the display unit does not respond, it is faulty and must be replaced.

If a specific button does not respond, the above method may be used (after clearing the display unit) to determine if the control unit or pad is at fault.

5 . Reconnect all leads removed from components during testing.

6 . Re-install the outer case cabinet.

7 . Reconnect the power supply cord after installing the outer case cabinet

8 . Run the oven and check all functions.

-G7

I

I

18

R-590BK

R-590BW


L. AH Sensor Test

Component Test

Checking the initial sensor cooking condition

1. The oven should be plugged in at least five minutes before sensor cooking.

2. Room temperature should not exceed 95’ F (35” C).

3. The unit should not be installed in any areas where heat and steam are generated. The unit should not be installed, for example, next to a conventional surface unit. Refer to the “INSTALLATION

INSTRUCTIONS” of the operation manual.

4. Exhaust vents are provided on the bottom of the unit for proper cooling and air flow in the cavity.

To permit adequate ventilation, be sure to install so as not to block these vents.

There should be some space for air circulation.

5. Be sure the exterior of the cooking container and the interior of the oven are dry. Wipe off any moisture with a dry cloth or paper towel.

6. The sensor works with food at normal storage temperature. For example, chicken pieces would be at refrigerator temperature and canned soup at room temperature.

7. Avoid using aerosol sprays or cleaning solvents near the oven while using Sensor settings. The sensor will detect the vapor given off by the spray and turn off before the food is properly cooked.

8. If the sensor has not detected the vapor of the food, ERROR will appear and the oven will shut off.

Water load cooking test

Note: The cabinet should be installed and screws tightened.

Make sure the oven has been plugged in at leaset two minutes before checking sensor cook operation. The cabinet should be installed and screws tightened.

1. Fill approximately 200 milliliters (7.2 oz.) of tap water in a 1000 milliliter measuring cup.

2. Place the container on the center of tray in the oven cavity.

3. Close the door.

4. Operate the oven in“POTATOES-WHITE” of sensor cooking condition, inaccordance with the following procedure.

4-1 Touch “COOK” button.

4-2 Touch “VEGETABLES” button.

4-3 Touch “PAGE FORWARD” button until “POTATOES-WHITE” appears.

4-4 Touch “POTATOES-WHITE” button.

4-5 Touch “START” button.

4-6 Now the oven is in the sensor cooking condition and “SENSOR COOK” will appear in the display.

5. Now the oven will operate for the first 16 seconds without generating microwave energy.

Note:

ERROR will appear if the door is opened or STOP/CLEAR button is touched during first stage of sensor cooking.

6. After approximately 16 seconds, microwave energy is produced, the oven should turn off when water is boiling (bubbling).

If the oven does not turn off, replace the AH sensor or check the control unit.

Testing Method for AH Sensor and/or Control Unit

To determine if the sensor is defective, the simplest method is to replace it with a new sensor.




4. Remove the AH sensor.

5. Install the new AH sensor.

6 Reconnect all leads removed from components during testing.

7. Re-install the outer case.

8. Reconnect the power supply cord and check the sensor cook operation, proceed as follows:

A. Fill approximately 200 milliliters (7.2 oz.) of tap water in a 1000 milliliter measuring cup.

B. Place the container on the center of tray in the oven cavity.

C. Close the door.

D. Operate the oven in “POTATOES-WHITE” of sensor cooking condition in accordance with procedure 4-1 to 4-6 of water load cooking test.

E. The control panel is in automatic Sensor operation.

F. The display will start to count down the remaining cookong time, and the oven will turn off automatically when the water is boiling (bubbling).

19

R-590BK

R-590BW

TEST PROCEDURES


L

.

Component Test

AH Sensor Test (Continued)

If the new sensor does not operate properly, the problem is with the control unit.

Checking the Control Unit




4. Disconnect the sensor connector that is mounted to control panel.

5. Then connect the dummy resistor circuit (see fig. A) to the sensor connector of control panel.

6. Disconnect the wire leads to the primary of power transformer.

7. Ensure that these leads remain isolated from other components and oven chassis by using insulated tape.

8. After that procedure, re-connect the power supply cord.

9. Check the sensor cook operation proceed as follows:

A. Operate the oven in “POTATOES-WHITE”of sensor cooking condition in accordance with procedure 4-1 to 4-6 of water load cooking test.

B. The control panel is in the sensor cooking operation.

C. After approximately 80 seconds, push plunger of select switch for more than 3 seconds. This condition is the same as judgment by AH sensor.

This condition is same as judgement by AH sensor.

D. After approximately 3 seconds, the display shows “XX. XX” which is the remaining cooking time, and the display count down.

If the above is not the case, the control unit is probably defective.

If the above checks positive, the AH sensor is probably defective.


11 .Open the door and block it open. ’


13.Disconnect the dummy resistor circuit from the sensor connector of control panel.

14.Carry out the necessary repair.

ISReconnect all leads removed from components during testing and repairing.

16Re-install the outer case cabinet.

17.Reconnect the power supply cord after the outer case is installed. Run the oven and check all functions.

18.Carry out the “Water load cooking test” again and ensure that the oven works properly.

,

F-l +

F-2 h

F-3 +

PLUNGER c

TO CONNECTOR (F)

ON CONTROL UNIT

CONNECTOR

1

2 c

3

Rl

T--NO1

COM

J o

COM l-Y% -- NC-_l

,

I

’

R2

RI, R2: 22&2 + 1% 1/2w

R3: 4.3kQ + 5% 1/4W

R4: IMfi & 5% ll4W

Figure A. Sensor Dummy Resistor Circuit

NC

NO

20

.

R-590BK

R-590BW

OUTLINE OF TOUCH CONTROL PANEL

The touch control section consists of the following units as shown in the touch control panel circuit:

(1) Switch Unit

(2) Control Unit (The Control Unit consist of Power Unit and LSI Unit)

The principal functions of these units and their related signals are explained below.

8.

Power Source Circuit

This circuit generates voltage necessary in the control unit from the AC line voltage.

In addition, the synchronizing signal is available in order to compose a basic standard time in the clock circuit.

Symbol Voltage Application vc

- 5v LSI (ICl),

Switch Unit

The key unit is composed of a matrix. Signals generated in the LSI are sent to the key unit through P41, P42, P43 and P44.

When a switch button is touched, a signal is completed through the switch unit and passed back to the LSI through P93, P94, P95 and P40 to perform the function that was requested.

9 .

Relay Circuit

To drive the magnetron, fan motor, turntable motor and oven lamp.

Control Unit

The Control unit consists of the following:

1. ICI

(LSI)

This is a microcomputer, responsible for controlling the entire control unit.

2. IC2

This is only a read memory IC, responsible for giving

ICI all programs

10 .

Buzzer Circuit

The buzzer is responsive to signals from the LSI to emit Audible sounds (key touch sound and completion sound).

11 .

Synchronizing Signal Circuit

The Power source synchronizing signal is available in order to compose a basic standard time in the clock circuit. It accompanies a very small error because it works on commercial frequency.-

3. IC3

This is only a memory IC .

This memorizes the contrast of LCD.

4. IC4

This is an amplifier IC .

This IC controls the contrast of LCD and amplifies the sensor signal.

12 .

Door Sensing Switch

A switch to “tell” the LSI if the door is open or closed.

13 .

Back Light Circuit

A circuit to drive the back light (Light emmitting diodes LDl-LD6 and Lamps LMPI, LMP2).

14

Absolute

Humidity

Sensor Circuit

This circuit detects the humidity of the food which is being cooked, to control automatic cooking.

5. LCD

driver

This IC drives the LCD.

6.

ACL

Circuit

A circuit to generate a signal which resets the LSI to the initial state when power is applied.

7. Indicator Circuit

This circuit consists of 100 x 65 dots using a liquid

Crystal Display.

15

Switch Circuit

The switch circuit composed of a matrix, signal generated in the LSI are sent to the switch circuit through P41, P42, P43, and P44

When a switch button is touched, a signal is completed through the switch circuit and passed back through the LSI through P86 and P87 .

1

21

R-590BK

R-590BW

Precautions for Handling Electronic

Components

SERVICING

the two can’t be separated. For those models, check and repair all the controls (sensor-related ones in- cluded) of the touch control panel while keeping it connected to the oven.

This unit uses CMOS LSI in the integral part of the circuits. When handling these parts, the following precautions should be strictly followed:

CMOS LSI have extremely high impedance at its input and output terminals. For this reason, it is easily in- fluenced by surrounding high voltage power sources, static electricity charge in clothes, etc. and sometimes it is not fully protected by the built-in protection circuit.

In order to protect CMOS LSI, practice the following guidelines:

1 . When storing and transporting LSI, thoroughly wrap them in aluminum foil.

Also wrap all PW boards in aluminum foil.

2 . When soldering, the technician should use a grounding strap as shown in the figure and use a grounded soldering iron and work table.

2 On some models, the power supply cord between the touch control panel and the oven proper is long enough that they may be separated from each other.

For those models, therefore, it is possible to check and repair the controls of the touch control panel while keeping it apart from the oven proper: in this case you must short both ends of the door sensing switch (on

PWB) of the touch control panel with a jumper, which brings about an operational state that is equivalent to the oven door being closed.

As for the sensor-related controls of the touch control panel, checking them is possible if dummy resistor (s) with resistance equal to that of the controls are used.

Servicing The Touch Control Panel With An

External Power Supply

Approx. 1 MQ

Shapes of Electronic Components

E

P

C B

Transistor

2SB1238

Transistor

DTD143ES

Disconnect the touch control panel completely from the oven proper, and short both ends of the door sensing switch (on PWB) of the touch control panel, which activates an operational state that is equivalent to the oven door being closed. Connect an external power source to the power input terminal of the touch control panel, then it is possible to check and repair the controls of the touch control panel; it is also possible to check the sensor-related controls of the touch control panel by using the dummy resistor (s).

Servicing Tools

Tools required to service the touch control panel assembly .

Servicing of Touch Control Panel

We describe the procedures to permit servicing of the touch control panel of the microwave oven and the precautions you must take when doing.so.

To perform the servicing, power to the touch control panel is available either from the power line of the oven itself or from an external power source.

1. Soldering iron: 30W

(It is recommended to use a soldering iron with a grounding terminal.)

2. Oscilloscope: Single beam, frequency range:

DC-1 OMHz type or more advanced model.

3. Hand tools.

Servicing The Touch Control Panel With

The Oven Power Supply Other Precautions

1. Before turning on the power source of the control unit, remove the aluminum foil applied for preventing static electricity.

The high voltage transformer of the microwave oven is still live during servicing and presents a hazard. 2. Connect the connector of the key unit to the control unit bein g sure that the lead wires are not twisted.

When checking the performance of the touch control panel, put the outer cabinet on the oven to avoid touching the high voltage transformer or unplug the primary terminal (connector) of the high voltage transformer to turn it off; the end of such connector must be insulated with an insulating tape. After servicing, be sure to reconnect the leads to their original locations.

3. After aluminum foil is removed, be careful that abnormal voltage due to static electricity etc. is not applied to the input or output terminals.

4. Attach connectors, electrolytic capacitors, etc. to

PWB, making sure that all connections are tight.

5 Be sure to use specified components where high pre- cision is required.

1. Onso lme models, the power supply co lrd between the touch control panel and the oven itself is so short that

22

COMPONENT REPLACEMENT/ADJUSTMENT PROCEDURE

R-590BK

R-590BW

Microwave ovens contain circuitry capable of producing very high voltage and current, contact with the following parts may result in severe, possibly fatal, electric shock.

Example

High Voltage Capacitor, Power Transformer, Magnetron, High Voltage Rectifier Assemb y, High Voltage Harness etc..

Avoid possible exposure to microwave energy. instructions below before operating the oven.

Please follow the


2. 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;

1. Door does not close firmly.

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

3. The door gasket or seal is damaged.

4. The door is bent or warped.

5. There are defective parts in the door interlock sys- tern.

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.

To prevent electric shock, take the following precautions.

1. Before wiring.

1) Disconnect the power supply cord.

2) Open the door and block it open.

3) Discharge the high voltage capacitor and wait for

60 seconds.

2. Don’t let the wire leads touch the following parts;

1) High voltage parts:

Magnetron, High voltage Transformer, High voltage capacitor and High voltage rectifier assembly.

2) Hot parts:

Oven lamp, Magnetron, High voltage Transform- er and oven cavity.

3) Sharp edge:

Bottom plate, oven cavity, waveguide, flange, chassis support and other metallic plate.

3

’

4

4) Movable parts (to prevent a fault)

Fan blade, Fan motor, Switch , Switch lever, and

Open button.

Do not catch the wire leads in the outer case cabinet.

Insert the positive lock connector until its pin is n locked and make sure that the wire leads do not come off even if the wire leads are pulled.

5 n To prevent an error function, connect the wire leads correctly, referring to the Wiring Diagram.

23

R-590BK

R-590BW

COMPONENT REPLACEMENT I ADJUSTMENT PROCEDURE

Please refer to “OVEN PARTS, CABINET PARTS, CONTROL PANEL PARTS, DOOR

PARTS” When carrying out any of the following removal procedures:

Outer Case Removal

1. Disconnect power supply cord before removing outer case cabinet.

2. Discharge the high voltage capacitor before touching any oven components or wiring.

4 .

5 .

6 . left portion of rear cabinet using a T20H Torx type or

GTXH20-100 screw driver.

Remove the two screws (2) from the rear of outer case.

Slide the entire case back about 1 inch (3cm) to free it from retaining clips on the cavity face plate.

Lift entire case from the unit.

To remove the outer case, proceed as follows.

1 . Disconnect the power supply cord.

2 . Open the oven door and block it open.

3 . Remove the two screws (2) from the upper and lower

When replacing the outer case, the 2 special Torx screws must be reinstalled in the same locations.

Power Transformer Removal

1 .

2 .

3 .

4 .

5 .

6 .

7 .

8 .

Disconnect the power supply cord and remove outer case cabinet.

Open the oven door and block it open.

Discharge high voltage capacitor.

Disconnect wire leads of the main wire harness and

H.V. wire from power transformer.

Disconnect the lead from magnetron filament.

Disconnect the leads of the power transformer from high voltage capacitor.

Remove the four (4) screws holding the transformer to base plate.

Remove the transformer.

9. Now the power transformer is free.

Re-install

1 . Rest transformer on baseplate with its primary terminals toward oven face plate.

2.

3 .

Secure transformer with four (4) screws to baseplate.

Re-connect the wire leads (primary and high volt-

4 . age) to transformer and filament leads of transformer to magnetron and high voltage capacitor. Refer to

“Wiring Diagram”.

Re-install outercase cabinet and check that oven is operating properly.

High Voltage Rectifier and High Voltage

Capacitor Removal

replacing the high voltage rectifier and high voltage capacitor, the ground side terminal of the high voltage rectifier must be secured firmly with a ground- and the high voltage rectifier assembly to the base plate.

5. Disconnect the wire lead of high voltage rectifier assembly from the magnetron.

6. Disconnect terminals of rectifier assembly from capacitor and magnetron. High voltage rectifier assembly is now free.

(RDA1504U)

1 .

2 .

3 .

4 .




Remove one (1) screw holding the capacitor band

Do not replace only high voltage rectifier. When replacing it, replace the entire high voltage rectifier assembly.

Maanetron Removal

1 .

2 .

3 .

4 .

5 .




Disconnect wire leads from the magnetron.

Remove the one (1) screw holding chassis support to magnetron and magnetron duct. Slide the magnetron duct slightly so that two (2) screws at left hand

6 .

7 .

8 . side of the magnetron appear.

Carefully remove the four (4) screws holding magnetron to waveguide flange.

Remove the magnetron with care so that the magnetron antenna is not hit by any metal objects around the tube.

Now, the magnetron is free.

24

.

R-590BK

R-590BW

COMPONENT REPLACEMENT / ADJUSTMENT PROCEDURE

Magnetron Installation

2.

3 .

4 .

5 . with care to prevent damage to the magnetron tube.

2. Secure the magnetron with four (4) screws.

When replacing the magnetron, be sure that the R.F. gasket is in place and that the mounting screws are tightened securely.

1 .

3. Hold the chassis support to the magnetron and magnetron duct with one (1) screw.

4. Connect wire leads to the magnetron .

Install magnetron assembly to the waveguide flange

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

Control Panel Assembly Removal

1 .

6 .

7 .

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

Remove barrier.


Disconnect wire leads from panel components.

Re-adjust the clip holding panel assembly to oven flange.

Remove control panel assembly by sliding it upward.

Now, individual components can be removed.

Oven Lamp and Lamp

Note: When soldering the display unit and the power unit, make sure both the display and power unit are parellel, as shown in the figure below.

I I\ w

\

Socket Removal

- -

\

Connector ’ Power unit

-

1 .

2 .

3 .

4 .

5 .




Pull the wire leads from the oven lamp socket with the flat type small screw driver.

Remove the oven lamp socket from the magnetron duct by turning the socket counterclockwise. Push- ing the small tab of magnetron locating the left hand

6 . side of lamp socket.

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

7. Remove the oven lamp from the oven lamp socket by turning the oven lamp.

3 . Now, the oven lamp and lamp socket are free.

Note: (orange) wires must be connected to the terminal with blue mark on the lamp socket.

Turntable Motor Removal

(RDAI 305U)

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.


2. Remove turntable and turntable support from oven cavity.

3 .

4

’

Lay the oven on its backside. Remove the turntable motor cover by snipping off the material in four corners.

When the corners have been snipped off, bend the corner areas flat. No sharp edges must be evident after removal of the turntable motor cover.

5 . Disconnect wire leads from turntable motor.

6

’

Remove two (2) screws holding turntable motor to oven cavity.

7 . Now turntable motor is free.

TURNTABLE

CUTTING PLIERS

TURNTABLE

MOTOR

COVER

- DOOR

I

Turntable motor cover removal

BASE PLATE

25

SCREW Supplied with replacement motor

Turntable motor cover re-install

DOOR

R-590BK

R-590BW

COMPONENT REPLACEMENT / ADJUSTMENT PROCEDURE

Turntable Motor Re-install

1 .

2 .

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

Insert the edge of motor cover into tab on the base plate.

3. Secure motor cover with one (1) screw to base plate.

Cooling Fan Motor Removal

1 . Disconnect the power supply cord and remove outer case cabinet.

2 .

3 .

4 .



Disconnect the wire leads from the fan motor.

5 . Remove two (2) screws holding the fan motor to the back plate of the oven cavity.

6 . Remove the fan blade from the fan motor shaft according to the following procedure. a) Hold the edge of the rotor of the fan motor by using a pair of groove joint pliers.

Do not use this removed fan blade again because the hole (for shaft) may become bigger than a standard one.

INSTALLATION

1 . a. b

C

.

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

Hold the center of the bracket which supports the shaft of the fan motor on the flat table.

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

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

Make sure that no metal pieces do not enter the gap between the rotor and the stator of the fan motor because the rotor is easily 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 in- jured. Do not disfigure the bracket by touching with the pliers.

4

C>

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

Now, the fan blade will be free.

Do not hit the fan blade hard when installed because the bracket may be disfigured.

Make sure that the fan blade rotates smooth after installation.

Make sure that the axis of the shaft is not slanted.

2. Install the fan motor to the back plate of the oven cavity with two (2) screws.

3. Connect the wire leads to the fan motor, referring to the wiring diagram.

Coil

\

3roove joint pliers

-

Side View

Axis

Rotor *

_

These are the positions which should be pinched

. . ..Um ,I:,“,

26

,

I

R-590BK

R-590BW

COMPONENT REPLACEMENT/ADJUSTMENT


I


Switch and Monitor Switch Adjustments

1 .

2 .

3 .




If the door sensing switch, secondary interlock switch and monitor switch do not operate properly due to a misadjustment, the following adjustment should be made.

1 .

2 .

3 .

4 .

5 .

Loosen the two (2) screws holding the latch hook to the oven cavity front flange.

With the door closed, adjust the 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 heads should be less than

0.5mm.

The vertical position of the latch hook should be placed where the door sensing switch and the secondary interlock switch have activated with the door closed.

Secure the screws with washers firmly.

Make sure of the door sensing switch operation. If the door sensing switch has not activated with the door closed, loosen the screw and adjust the latch hook position.

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

Note: After adjustments, make sure of the following:

1. In and out play of the door remains less than 0.5mm when in the latched position.

Check the upper position of the latch hook by pushing and pulling the upper portion of the door.

PROCEDURE

Then check lower portion of the latch hook, by pushing and pulling the lower portion of the door toward the oven face. Both results (play of the door) should be less than 0.5mm.

2. The door sensing and secondary interlock switches interrupt the circuit before the door can be opened.

Monitor switch contacts close when door is opened.

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

Procedure.“)


I


Switch and Monitor Switch Removal

1 .

2 .


The door sensing and secondary interlock switches interrupt the circuit before the door can be opened.

Discharge high voltage capacitor. 3 .

4 .

5 .

Disconnect wire leads from switches, fuse and connectors from control panel.

Remove one (1) screw holding control panel to oven cavity faceplate.

6 . Slide control panel assembly upward and remove from cavity faceplate.

7 .

8 .

Open oven door.

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

9 . Remove latch hook from oven flange by lifting up on flexible tab and pushing latch hook back.

1 O.Locate the flexible retaining tabs on the latch hook.

11. Push tab inward and rotate switch counterclockwise to release switch.

Note: For monitor switch, lift switch over boss while rotating counterclockwise.

12.Switch is now free.

H

!J%kh

8

I’

27

R-590BK

R-590BW

DOOR DISASSEMBLY

Removal


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 the figure below to free en- gaging parts .

4. Pry the lever and lift up the choke cover by inserting a putty knife in the order as shown in the figure below.

5. Release choke cover from door panel.

6. Now choke cover is free from door panel.

After adjustment, make sure of the following:

1. Door latch heads smoothly catch latch hook through latch holes, and also latch head goes through the center of the hole.

2. Deviation of door alignment from horizontal line of cavity face plate is less than 1 .O mm.

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

4. Install the outer case cabinet and check for microwave leakage around the 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 the oven cavity during the cooking cycle. This function does not require that the door be air tight, moisture tight, or light tight. Therefore, the occasional appearance of moisture, light or sensing of gentle warm air movement around the oven door is not abnormal and does not indicate leakage of microwave energy from the cavity.

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

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

9. Release door panel from twelve (12) tabs of door frame and remove door frame.

1 O.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 and latch head.

14.Now latch head and latch spring are free.

15Remove 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.

3. Re-install door panel to door frame by fitting twelve

(I 2) tabs of door frame to twelve (12) holes of door panel.

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

Installation” and on how to handle the new film.

5. Catch two (2) pins of door panel on two (2) holes of upper and lower door hinge.

6. Re-install choke cover to door panel by snapping on to the door panel.

Note: After any service to the door

(A)Make sure that door sensing switch, secondary

Interlock switch, primary Interlock relay and monitor switch are operating properly.

(Refer to section “Test Procedures”.)

(B)An approved microwave survey meter should be used to assure compliance with proper microwave radiation emission limitation standards.

Sealer Film Installation

film as shown below.

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

28

R-590BK

R-590BW

ABSOLUTE HUMIDITY SENSOR CIRCUIT

Structure of Absolute Humidity Sensor

The absolute humidity sensor includes two thermistors as shown in the illustration. One thermistor is housed in the closed vessel filled with dry air while another is in an open vessel. Each sensor is provided with a protective cover made of metal to protect it from the external air- flow. The open vessel cover has two small holes in it to allow moisture laden air from the oven cavity to surround

It.

Sensing part

(Open vessel)

Thermistors

A

Sensing

(Closed

Part vessel)

Operational Principle of AH Sensor

the sensor cooking of the unit.

When the unit is set in the sensor cooking mode, 16 seconds later the detector circuit starts to function and the

LSI observes the initial voltage available at its AN1 terminal. With this voltage given, the switches SW1 to

SW5 in the LSI are turned on in such a way as to change the resistance values in parallel with R56-60 of IC4.

Changing the resistance values results in that there is the same potential at both the F-3 terminal of the absolute humidity sensor and the AN5 terminal of the LSI.

The voltage of AN6 terminal will indicate about -2.5V.

This initial balancing is set up about 16 seconds after the unit is put in the Sensor Cooking mode.

As the sensor cooking proceeds, the food is heated to generate moisture by which the resistance balance of the bridge circuit is deviated to increase the voltage available at the AN6 terminal of the LSI. Then the LSI observes that voltage at AN6 terminal and compares it with its initial value. When the comparison rate reaches the preset value (fixed for each menu to be cooked), the

LSI caused the unit to stop sensor cooking; thereafter, the unit goes in to the next operation automatically.

When the LSI starts to detect the initial voltage at AN6 terminal 16 seconds after the unit has been put in the

Sensor Cooking mode, if it is impossible to take a balance of the bridge circuit due to disconnection of the absolute humidity sensor, ERROR will reappear on the display and cooking is stopped.

. .

I

The figure below shows the basic structure of an absolute humidity sensor. A bridge circuit is formed by two thermistors and two resistors (Rl and R2).

The output of the bridge circuit is amplified by an operational amplifier.

Each thermistor is supplied with a current to keep it heated to about 150” C (302” F) and the resultant heat is dissipated in the air, if the two thermistors are placed in different humidity conditions they show different humidity conditions and different degrees of heat conduc- tivity leading to a potential difference between them causing an output voltage from the bridge circuit, the in- tensity of which is increased as the absolute humidity of the air increases. Since the output is very minute, it is f: amplified by the operationa’ amplifier.

Operational $

Absolute humidity vs. output voltage characteristic 1

L-w-

R3

[

S: Thermistor open vessel

C: Thermistor closed vessel

’

Absolute humidity (g/m3) *

Detector Circuit of AH Sensor Circuit

Absolute Humidity Sensor Circuit

?

RF?2

.“V

3

.

R64

AN6 p

--__ i j i

D,O,

--I----Y t

Va:-16V t S: Thermistor open vessel

.-

C: Thermistor closed vessel

This detector circuit is used to detect the output voltage of the absolute humidity circuit to allow the LSI to control

29

AH SENSOR DUCT REMOVAL

7. Slide the two tabs of the sensor duct to the right. 1 .

2 .

Disconnect the power supply cord.


3 . Remove screws from the rear of the outercase cabinet. Slide the entire case back about 1 inch (3cm) to free it from retaining clips on the cavity faceplate.


5 . Lift entire outer case cabinet from unit.

8. Sensor duct is now free.

Discharge the high voltage capacitor before touching any oven components or wiring.

6 . Remove ground screw mounted into the sensor duct.

Sensor Ground screw

\

Slide

Sensor Duct

/

AH SENSOR REPLACEMENT

Removal

1 . Disconnect power supply cord .

2 . Open the oven door and block it open.

3 . Remove screws from the rear of the outercase cabinet. Slide the entire case back about 1 inch (3cm) to free it from retaining clips on the cavity faceplate.

4 . Lift the entire outercase cabinet from the oven unit.

5 . Discharge high voltage capacitor.

6 . Remove two (2) screws holding the AH sensor

Refer to Figures l-l 6 & 2-l 6.

7 . Disconnect the AH sensor harness from connector

CN-F on control unit.

8 . AH sensor is now free.

Installation

1 . Insert new AH sensor into AH sensor duct.

Refer to Figures l-16 & 2-16 for proper sensor orientation.

2 . Install two (2) screws to secure AH sensor.

3 . Route the AH sensor harness above emboss on AH sensor duct.

Refer to Figures l-1 6 & 2-l 6.

4 . Continue to route AH sensor harness across the oven cavity top plate and through the large opening.

Refer to Figure 2-16.

5 . Connect AH sensor harness to CN-F on the control unit.

6 . Re-install the outercase cabinet and check for proper operation.

30

c

. .

. ,

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AH SENSOR ORIENTATIOI\I & HARNESS ROUTING

AH Sensor

Orientation

Mounting

Screw

AH densor Mocntiw

Screw

AH Sensor Duct

II

Figure l-1 6

Oven Left Side View

R-590BK

R-590BW

AH Sensor

Harness b

Figure 2-I 6

Oven Top View

31

R-590BK

R-590BW

Make sure that the door sensing switch, secondary interlock switch and monitor switch are operating properly by checking with an ohmmeter.

Refer to the “Test Procedure” of the door sensing switch, secondary interlock switch and monitor switch.

Requirements

MICROWAVE MEASUREMENT PROCEDURE

2 . Place the oven tray in the oven cavity. After adjustment of the door, interlock and monitor switches are completed individually or collectively, a IN-

TERLOCK SWITCH TEST and MICROWAVE LEAK-

AGE TEST must be performed to assure compliance with DHHS (CDRH) Performance Standards for Micro- wave Ovens.

Interlock Switch Test

Microwave Leakage Test

3 . Place the load of 275 & 15ml(9.8 oz.) of tap water initially at 20 + 5°C (68’F) in the center of the oven cavity.

The water container shall be a low form of 600 ml (20 oz.) beaker with an inside diameter of approximately

8.5 cm (3 % in.) and made of an electrically noncon- ductive material such as glass or plastic.

The placing of this standard load in the oven is impor- tant not only to protect the oven, but also to insure that any leakage is measured accurately.

4 . Set the cooking control on High.

5 . Close the door and put the oven into a cook cycle for several minutes. If the water begins to boil before the survey is completed, replace it with 275ml of cool water.

1 . Microwave leakage limit (Power density limit).

The power density of microwave radiation emitted by a microwave oven shall not exceed 1 mW/cm* at any point 5cm or more from the external surface of the oven, measured prior to acquisition by the purchaser, and thereafter (through the useful life of the oven)

5mWcm* at any point 5cm or more from the external surface of the oven.

Leakage Test

Closed-door leakage test (microwave measurement).

1. Grasp the probe of the survey instrument and hold it perpendicular to the gap between the door and the body of the oven.

2 . Move the probe slowly, not faster than 1 in./sec

(2.5cm/sec.) along the gap, watching for the maximum indication of the meter.

2 . Safety interlock switches.

Primary interlock relay and door sensing switch will prevent microwave radiation emissions in excess of the requirement as above mentioned, secondary interlock switch shall prevent microwave radiation emission in excess of 5 mW/cm* at any point 5cm or more from the external surface of the oven.

3 . Check for leakage at the door screen, sheet metal seams and other accessible positions where the continuity of the metal has been breached (eg., around switches, indicator and vents).

While testing for leakage around the door pull the door away from the front of the oven as far as is per- mitted by the closed latch assembly.

Preparation For Testing

Before beginning the actual measurement of leakage, proceed as follows:

1. Make sure that the actual instrument is operating normally as specified in its instruction booklet.

4 . Measure carefully at the point of the highest leakage and make sure that the highest leakage is no greater than 4 mW/cm* to allow for measurement uncertainty, and that the secondary interlock switch does turn the oven OFF before any door movement.

Note:

Survey instruments that comply with the requirement for instrumentation 21 CFRI 030.1 O(c)(3)(i), as prescribed by the performance standard for microwave ovens must be used for testing.

Note:

After servicing, record data o and microwave leakage report service invoice

,

.

32

1 2 n

1 2

3

3

33

4

4

L

5

6

R-590BK

R-590BW

P

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B

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5 6

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R-590BK

R-590BW

1 2 3

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AC1 20V r

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TURNTABLE

MOTOR

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FAN

MOTOR

MICRO

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R-590BK

R-590BW

G

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NOTE p

--M-

: IF NOT SPEC ~FIED, 1/4w + 5%

: IF NOT SPEC IFIED, 1 N/FDLL4148

3

Power Unit Circuit

4

35

1 2

5 6

R-590BK

R-590BW

1

A

2 3 4 5 6

B

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R-590BW

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R-590BK

R-590BW

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R-590BK

R-590BW

1

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E

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Back side

Printed Wiring Board of Display Unit

3 4

39

5 6

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-

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3

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R-590BK

R-590BW

PARTS LIST

Contact

your nearest

SHARP

Parts

Distributor to order.

For location of

SHARP Parts Distributor, Please call Toll-Free;

I-800-BE-SHARP

A

A

2- 1

2- 2

2- 3

2- 4

2- 5

2- 6

2- 7

2- 8

2- 9

2-10

2-11

2-12

L l- 8 l- 9 l-10 l-11

1-12

1-13

1-14

1-15

1-16

1-17

1-18 l- 1 l- 2 l- 3 l- 4 l- 5 l- 6 l- 7

Ref No.

2-13

2-14

2-15

2-16

2-17

2-18

2-19

Part No.

RC-QZBOl8MREO

FH-DZBOO8MRYO

QSOCLBOOGMREO

RLMPTAO68WREO

RMOTEA346WREO

QFSHDB003MREO

QSW-MAllOWREO

QFS-TBOOlMREO

QFS-TBOO5MREO

RV-MZA255WREO

RMOTDAl86/KIT

RTRN-BO59MREO

FACCDBOO3MREO

QW-QZBOlGMREO

FW-VZBl5OMREO

FW-VZB125MREO

FDTCTAl77WRKO

Q Description

Electrical

M H.V. Capacitor

M H.V. Diode assembly

M Oven lamp socket

M Oven lamp

M Fan motor

M Fuse block

M Monitor switch (V-16G-2C25) & Fuse assembly

(20A-25OVAC)

M Sec. interlock & Door sensing switch (V-16G-3C25)

M Magnetron Temperature fuse (121OC)

M Cavity Temperature fuse (152'C)

M Magnetron

M T.T. Motor

M Power transformer

M Power cord

M H.V. wire A (Transformer - Capacitor)

M Main wire harness

M Stop switch harness

M AH sensor

Qty Code

AQ

AC

AU

AF

AQ

AE

AF

AF

BE

AP

BF

AE

AE

AR

AD

AF

1

1

1

1

1

1

1

2

1

1

1

1

1

1

1

1

1

1

LBNDKBOO7MRPO

LANGTBO35MRPO

PHOK-BO13MRFO

GDAI-BO5lMRPO

GLEGPBOO3MRFO

MLEVPBOl6MRFO

PDUC-BO73MRPO

NFANPBOOlMREO

PDUC-BO43MRFO

Oven

M H.V. Capacitor band

M Chassis support

M Latch hook

M Base plate

M Foot

M Latch lever

M Magnetron duct

M Fan blade

M Fan duct

PCOVPBO54MRPO

GCABUBO83MRPO

GCABUBO68MRPO

FROLPBO24MRKO

NTNT-BOOlMREO

PPACGBOl4MRFO

PCUSGBO28MRPO

PDUC-BO74MRPO

PCUSUBO42MREO

PCUSUO464MREO

M Waveguide cover

M Outer case cabinet (R-590BK)

M Outer case cabinet (R-590BW)

M T.T. Roller assembly

M T.T. Tray

M T.T. Motor packing

M AH sensor duct cushion

M AH sensor duct

M Air flow cushion

M Base plate cushion

1

1

1

2

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

4

AB

AE

AG

AT

AC

AY

AY

AN

AT

AD

AG

AC

AD

-

AF

40

?Yl-2 jP1

I?1

JRSl

ZDl zD2

3-2

3-2-l

3-2-2

3-2-3

3-2-4

3-2-5

3-2-6

3-2-7

3-l

3-1A

&lB

I1

12

13

14-6

11-4

17-8

21-Q2

23 il

12

13-R4

15

36

3-2-8

3-2-9

3-3

3-3-l

3-3-2

3-4

Ref No.

3- 5

3- 6

3- 6

3- 7

3- 8

3- 9

3-10

3-11

3-12

3-13

Part No. 5 Description

Control Panel

DPWBFBO88MRUO M Power unit

QCNCMA275DREO J 2-pin connector (CN-A)(CN-B)

QCNCMA432DREO J l&pin connector (CN-C)

RC-KZAO87DREO J Capacitor O.lpF 50V

VCEAB31VWlO8M J Capacitor

RC-KZAO87DREO J Capacitor

1OOOpF 35V

O.lpF 50V

VCEAB31VWlO6M J Capacitor

VHDllESl///-1 J Diode (llES1)

10pF 35V

VHDlSS27OA/-1 J Diode (lSS270A)

VS2SB1238//-3 J Transistor (2SB1238)

VSKRC243M//-3 J Transistor

VRD-Bl2EF242J J Resistor

(KRC243M)

2.4k@/&v

VRS-B13AA82OJ J Resistor

VRD-Bl2EF132J J Resistor

VRD-B12EF332J J Resistor

82Dlw

1.3kQ1/,w

3.3ka1/,w

VRS-B13AA82OJ J Resistor 82alw

RRLY-BOO2MREO M Relay (DU24Dl-1P)

RALM-AOl4DREO J Buzzer (PKM22EPT-THAI)

RTRNPAll3DREO J Transformer

RH-VZAO32DREO J Varistor (104G471K)

VHEHZ163///-1 J Zener diode (HZ16-3)

VHEHZ202///-1 J Zener diode (HZ202)

DPWBFB824WRKO J Display unit

RH-HZAO14DREO J Thrmistor THl

RH-TZAl2ODREO J Transistor (KRA101S).Q12,Q20,Q40,(242,Q140,Q160

RH-TZAl19DREO J Transistor (KRAlOlS).Q41

RH-TZAl27DREO J Transistor (KRAlO5S).Q22

RH-DZAO74DREO J Diode (lSS181). D20,D50

RH-DZAO77DREO J Zener diode (RD5.6NB2). ZDlO

RLMPHAO46DREO J Lamp (LMPl, LMP2)

RH-TZA13ODREO J Transistor (2SA1036K).Q141

QSW-PAOlGDREO J Tact Switch (SW&SWl5)

DPWBFBO89MRUO M Switch unit

FW-VZA219DREO J Lead Wire harness (CN-G)

QSW-PAOlGDREO J Tact Switch (SWl-SW15)

FPNLCB225MRKO M Control panel assembly (R-59OBK)

FPNLCB226MRKO M Control panel assembly (R-59OBW)

GMADIBO31MRRO M Display window (R-590BK)

GMADIBO32MRRO M Display window (R-590BW)

JBTN-BO64MRFO M Open button (R-590BK)

JBTN-BO69MRFO M Open button (R-590BW)

JBTN-BO76MRFO M Book Mark button(R-59OBK)

JBTN-BO77MRFO M Book Mark button(R-59OBW)

JBTN-BO78MRFO M Page button (R-590BK)

JBTN-BO79MRFO M Page button (R-590BW)

JBTN-BO8OMRFO M Select button (R-590BK)

JBTN-BO81MRFO M Select button (R-590BW)

JBTN-BO82MRFO M Start button (R-590BK)

JBTN-BO83MRFO M Start button (R-59OBW)

MSPRTAO5OWREO M Open button spring

MSPRTBO13MREO M Book Mark button spring

XEPSD3OPlOXSO M Screw; Control unit mtg.

41

R-590BK

R-590BW

Qty Code

,

1

6

1

1

15

1

1

2

1

2

1

1

1

1

1

2

1

1

1

1

1

1

1

6

1

1

1

2

1

3

4

2

2

1

1

2

1

1

1

1

1

1

1

1

1

1

9

1

1

1

1

1

AZ

AD

AF

AB

AD

AB

AB

AB

AB

AA

AF

AE

AE

AE

AE

AX

AX

AG

AG

AF

AH

AG

AR

AK

AB

AE

AE

AE

AE

AE

AE

AH

AG

AT

AE

AC

AB

BR

AE

AE

AE

AE

AE

AG

R-590BK

R-590BW

Ref No.

A

I

4- 0

4- 0

4- 1

4- 1

4- 2

4- 3

4- 4

4- 5

4- 6

4- 7

4- 7

5- 1

5- 2

5- 3

5- 4

6- 1

6- 2

6- 3

6- 4

6- 5

6- 6

6- 7

6- 8

6- 9

6-10

6-11

6-11

6-12

Part No.

CDORFB2llMRKO

CDORFB212MRKO

FCOV-Bl33MRKO

FCOV-Bl34MRKO

FDORFBO49MRTO

PSHEPBO16MREO

GCOVHBO28MRFO

LSTPPBO2lMRFO

MSPRTAO46WREO

HPNL-BO8OMREO

HPNL-BO81MREO

TCAUABOl5MRRO

TCAUABO27MRRO

TCAUABO33MRRO

TINSEBl94MRRO

LX-BZAO4lWREO

LX-CZOO52WREO

XHTSD4OP12RVO

LX-BZ0081YBEO

XOTSD4OPl2000

XCPSD3OPO8000

XCBSD3OPO8000

XHTSD4OPO8000

LX-CZAO38WREO

XHTSD4OP08RVO

XOTSF40P12000

XOTSE4OP12000

LX-CZBOllMREO

Q Description Qty Code

Door

M Door assembly(R-590BK)

M Door assembly(R--590BW)

M Door screen assembly(R-59OBK)

M Door screen assembly(R-59OBW)

M Door panel

M Sealer film

M Choke cover

M Latch head

M Latch spring

M Door Screen (R-590BK)

M Door Screen (R-590BW)

Miscellaneous

M Monitor caution label

M DHHS caution label

M UL SCREW label

M Operation manual

Fasteners

M

M

M

M

M

M

M

M

M

M

M

M

M

Screw; Base plate mtg.

Screw; Latch hook & AH sensor duct

Screw; Power cord mtg.

Screw; H.V. Capacitor mtg.& Magnetron mtg.

Screw; Power transformer mtg., Chassis support &

Base plate.

Screw; T.T. Motor mtg. SC AH sensor.

Screw; Temperature fuse mtg.

Screw; Magnetron duct mtg.

Screw; O.C. Cabinet grnd.

Screw; Fan motor mtg.

Screw; O.C. Cabinet(R-530BK)

Screw; O.C. Cabinet(R-530BW)

Screw; UL O.C. Cabinet

-

-

4

2

2

2

2

4

4

2

2

3

1

5

11

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

BE

BE

AS

AT

AD

AG

AE

AB

AH

AK

1

AB

AF

1

42

1

Cavity Assembly

2

3 4

5

2

.

6-11

R-590BK

R-590BW

6

>

-

F

-

D

-

E

G

-

C

-

H

E

-

E

-

R-590BK

R-590BW

1 2 3 4 5 6

‘\ /’

‘.,’ r

Door Assembly

------~-------~_--__

--------------__

4-o

:::

----~ --

1

I

H I

.

\ \

\

I

I

. I

.

\

1

\

I

L___~_______-_--~1____-~_----_-________

1

2 3

44

4 5 6

1

H

I

A

1

Wire Harnesses

2 3 rr

”

A-,

* Actual harnesses may be different than illustrations.

Packing and Accessories

4 5 6

R-590BK

R-590BW rc

*

PACKING KIT

/l a OPERATION MANUAL 0

TURNTABLE SUPPORT

TURNTABLE TRAY

A

ITIC

BAG E

I

* Non-replaceable items.

1 2 3

45

4 5 6

SHARK

‘980 SHARP CORP. (7M2.70E) Printed in U.S.A.

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