Sharp R-530EK-T, R-530EW-T, R-530ES-T Service Manual

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R530EW

SERVICE MANUAL

SX705R530EPW/

MICROWAVE OVEN

R-530EW-T

MODELS

R-530EK-T R-530EW-T R-530ES-T

R-530ES-T

In the interest of user-safety the oven should be restored to its original condition and only 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 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..)

CONTENTS

PRECAUTIONS TO BE OBSERVED BEFORE AND DURING SERVICING TO AVOID POSSIBLE EXPOSURE TO EXCESSIVE MICROWAVE ENERGY CHAPTER 1. WARNING TO SERVICE PERSONNEL

CHAPTER 2. MICROWAVE MEASUREMENT PROCEDURE

CHAPTER 3. FOREWORD AND WARNING

CHAPTER 8. TEST PROCEDURES

CHAPTER 9. TOUCH CONTROL PANEL ASSEMBLY

CHAPTER 10. PRECAUTIONS FOR USING LEADFREE SOLDER

CHAPTER 11. COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE

CHAPTER 4. PRODUCT DESCRIPTION

CHAPTER 5. GENERAL INFORMATION

CHAPTER 6. OPERATION

CHAPTER 7. TROUBLESHOOTING GUIDE

CHAPTER 12. CIRCUIT DIAGRAMS

Parts List

This document has been published to be used for after sales service only. The contents are subject to change without notice.

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CONTENTS

PRECAUTIONS TO BE OBSERVED BEFORE AND DURING SERVICING TO AVOID POSSIBLE EXPOSURE TO EXCESSIVE MICROWAVE ENERGY

CHAPTER 1. WARNING TO SERVICE PERSONNEL

[1] Before Servicing.......................................... 1-1

[2] When the testing is completed,................... 1-1

[3] After repairing.............................................. 1-1

CHAPTER 2. MICROWAVE MEASUREMENT PROCEDURE

[1] Requirements:............................................. 2-1

[2] Preparation for testing:................................ 2-1

[3] Leakage test: .............................................. 2-1

CHAPTER 3. FOREWORD AND WARNING

[1] FOREWORD............................................... 3-1

[2] WARNING................................................... 3-1

[3] DANGER..................................................... 3-1

CHAPTER 4. PRODUCT DESCRIPTION

[1] SPECIFICATIONS ...................................... 4-1

CHAPTER 5. GENERAL INFORMATION

[1] GROUNDING INSTRUCTIONS.................. 5-1

[2] OVEN DIAGRAM ........................................ 5-1

CHAPTER 6. OPERATION

[1] DESCRIPTION OF OPERATING SE-

QUENCE .................................................... 6-1

[2] OVEN SCHEMATIC.................................... 6-2

[3] DESCRIPTION AND FUNCTION OF

COMPONENTS .......................................... 6-3

CHAPTER 7. TROUBLESHOOTING GUIDE

CHAPTER 8. TEST PROCEDURES

[1] A: MAGNETRON ASSEMBLY TEST .......... 8-1

[2] B: POWER TRANSFORMER TEST ........... 8-1

[3] C: HIGH VOLTAGE RECTIFIER TEST....... 8-1

[4] D: HIGH VOLTAGE CAPACITOR TEST..... 8-2

[5] E: TEMPERATURE FUSE OR THER-

MAL CUT-OUT TEST ................................. 8-2

[6] F: SECONDARY INTERLOCK SWITCH

AND PRIMARY INTERLOCK SYSTEM

TEST........................................................... 8-2

[7] G: MONITOR SWITCH TEST ..................... 8-3

[8] H: BLOWN MONITOR FUSE TEST ........... 8-3

[9] I: NOISE FILTER TEST .............................. 8-4

[10] J: TOUCH CONTROL PANEL ASSEM-

BLY TEST ................................................... 8-4

[11] K: KEY UNIT TEST..................................... 8-5

[12] L: RELAY TEST .......................................... 8-5

[13] M: DEFROST CENTER TEST .................... 8-6

[14] N: FOIL PATTERN ON THE PRINTED

WIRING BOARD TEST............................... 8-6

[15] O: AH SENSOR TEST................................ 8-7

CHAPTER 9. TOUCH CONTROL PANEL ASSEMBLY

[1] OUTLINE OF TOUCH CONTROL PAN-

EL ............................................................... 9-1

[2] ABSOLUTE HUMIDITY SENSOR CIR-

CUIT............................................................ 9-2

[3] SERVICING FOR TOUCH CONTROL

PANEL ........................................................ 9-3

CHAPTER 10. PRECAUTIONS FOR USING LEADFREE SOLDER

CHAPTER 11. COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE

[1] WARNINGS ...............................................11-1

[2] OUTER CASE REMOVAL .........................11-1

[3] POWER TRANSFORMER REMOVAL .. [4] HIGH VOLTAGE RECTIFIER AND HIGH

VOLTAGE CAPACITOR REMOVAL...........11-2

[5] MAGNETRON REMOVAL .........................11-2

[6] OVEN LAMP REMOVAL............................11-3

[7] POSITIVE LOCK CONNECTOR (NO-

CASE TYPE) REMOVAL ...........................11-3

[8] CONTROL PANEL ASSEMBLY RE-

MOVAL.......................................................11-3

[9] TURNTABLE MOTOR REMOVAL .............11-3

[10] COOLING FAN MOTOR REMOVAL..........11-3

[11] DOOR SENSING SWITCH/SECOND-

ARY INTERLOCK SWITCH AND MONI-

TOR SWITCH REMOVAL..........................11-4

[12] DOOR SENSING SWITCH/SECOND-

ARY INTERLOCK SWITCH AND MONI-

TOR SWITCH ADJUSTMENT ...................11-4

[13] DOOR REPLACEMENT ............................11-5

CHAPTER 12. CIRCUIT DIAGRAMS

[1] Pictorial Diagram....................................... 12-1

[2] Power Unit Circuit ..................................... 12-2

[3] LSI Unit Circuit .......................................... 12-3

[4] Printed Wiring Board of Power Unit .......... 12-4

Parts List

....11-2

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PRECAUTIONS TO BE OBSERVED BEFORE AND DURING SERVICING TO AVOID POSSIBLE EXPOSURE TO EXCESSIVE MICROWAVE ENERGY

BEFOR SERVICING

PRECAUTIONS TO BE OBSERVED BEFORE AND DURING SERVICING TO AVOID POSSIBLE EXPOSURE TO EXCESSIVE MICROWAVE ENERGY

(a) 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.

compartments, check the magnetron, wave guide or transmission line, and cavity for proper alignment, integrity, and connections.

(d) Any defective or misadjusted components in the interlock, monitor, door seal, and microwave

generation and transmission systems shall be repaired, replaced, or adjusted by procedures described in this manual before the oven is released to the owner.

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

performed on each oven prior to release to the owner.

BEFORE SERVICING

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 immediately @1-800-237-4277.

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 Food and Drug Administration's Center for Devices and Radiological Health immediately.

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

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R530EWT

Service Manual

CHAPTER 1. WARNING TO SERVICE PERSONNEL

Microwave ovens contain circuitry capable of producing very high voltage and current, contact 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.

[1] Before Servicing

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

2. Open the door and block it open.

3. Discharge high voltage capacitor.

WARNING: RISK OF ELECTRIC 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. It may, in some cases, be necessary to connect the power supply after the outer case has been removed, in this event,

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

2) Open the door and block it open.

3) Discharge high voltage capacitor.

4) 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 insulation tape.

6) After that procedure, reconnect the power supply cord.

[2] When the testing is completed,

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

2. Open the door and block it open.

3. Discharge high voltage capacitor.

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

5. Reinstall the outer case (cabinet).

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

7. Run the oven and check all functions.

[3] After repairing

1. Reconnect all leads removed from components during testing.

2. Reinstall the outer case (cabinet).

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

4. Run the oven and check all functions.

Microwave ovens should not be run empty. To test for the presence of microwave energy within a cavity, place a cup of cold water on the oven turntable, close the door and set the power to HIGH and set the microwave timer for two (2) minutes. When the two minutes has elapsed (timer at zero) carefully check that the water is now hot. If the water remains cold carry out Before Servicing procedure and reexamine the connections 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 microwave leakage test should be carried out.

Don't Touch ! Danger High Voltage

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R530EWT

Service Manual

CHAPTER 2. MICROWAVE MEASUREMENT PROCEDURE

[1] Requirements:

1. Microwave leakage limit (Power density limit): The power density of microwave radiation emitted by a microwave oven should not exceed 1mW/ cm

at any point 5cm or more from the external surface of the oven, measured prior to acquisition by a purchaser, and thereafter (through the use-

ful life of the oven), 5 mW/cm

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

2. Safety interlock switches:

Primary interlock relay and door sensing switch shall prevent microwave radiation emission 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.

[2] 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.

Important:

Survey instruments that comply with the requirement for instrumentation as prescribed by the performance standard for microwave ovens, 21 CFR

1030.10(c)(3)(i), must be used for testing.

2. Place the oven tray in the oven cavity.

3. Place the load of 275±5 ml (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 approx. 8.5 cm (3-1/2 in.) 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.

4. Set the cooking control on Full Power Cooking Mode

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

[3] 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. (2.5 cm/sec.) along the gap, watching for the maximum indication on the meter.

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 the 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 permitted by the closed latch assembly.

4. Measure carefully at the point of highest leakage and make sure that the highest leakage is no greater than 4mW/cm

, and that the secondary

interlock switch and the primary interlock relay and door sensing switch do turn the oven OFF before any door movement.

NOTE: After servicing, record data on service invoice and microwave leakage report.

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R530EWT

Service Manual

CHAPTER 3. FOREWORD AND WARNING

[1] FOREWORD

This Manual has been prepared to provide Sharp Electronics Corp. Service Personnel with Operation and Service Information for the SHARP MICROWAVE OVENS, R-530EK-T, R-530EW-T and R-530ES-T.

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

Check the interlock switches and the door seal carefully. Special attention should be given to avoid electrical shock and microwave radiation hazard.

[2] WARNING

Never operate the oven until the following points are ensured.

(A) The door is tightly closed.

(B) The door brackets and hinges are not defective.

(D) The door is not deformed or warped.

(E) There is no other visible damage with the oven.

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

[3] 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, Magnetron, High Voltage Rectifier Assembly, High Voltage Harness;

If provided, Vent Hood, Fan assembly, Cooling Fan Motor.

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

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

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

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R530EWT

Service Manual

CHAPTER 4. PRODUCT DESCRIPTION

[1] SPECIFICATIONS

ITEM DESCRIPTION

Power Requirements

120 Volts 60 Hertz Single phase, 3 wire grounded

Power Consumption 1700W / Approx. 14.3 Amperes

Power Output

1200 W nominal of RF microwave energy (IEC Test procedure) Operating frequency 2450 MHz

Outside Dimensions

Width 24" Height 13-3/8" Depth 19-1/8"

Cooking Cavity Dimensions (2.0 Cubic feet)

Width 17-3/8" NOTE: Internal capacity is calculated by measuring Height 10-1/2" maximum width, depth and height. Depth 18-5/8" Actual capacity for holding food is less.

Control Complement

Touch Control System Clock (1:00 - 12:59) Timer (0 - 99 minutes 99 seconds) Microwave Power for Variable Cooking

Repetition Rate;

100 PERCENT ............................. Full power throughout the cooking time

90 PERCENT ............................................... approx. 90% of Full Power

80 PERCENT ............................................... approx. 80% of Full Power

70 PERCENT ............................................... approx. 70% of Full Power

60 PERCENT ............................................... approx. 60% of Full Power

50 PERCENT ............................................... approx. 50% of Full Power

40 PERCENT ............................................... approx. 40% of Full Power

30 PERCENT .............................................. approx. 30% of Full Power

20 PERCENT ............................................... approx. 20% of Full Power

10 PERCENT ............................................... approx. 10% of Full Power

0 PERCENT .............................. No power throughout the cooking time

Sensor Cooking pads Breakfast pad Lunch pad 15 Minute Recipes pad Defrost Center pad From the Pantry pad Beverage Center pad Number selection pads Timer/Clock pad Keep Warm Plus pad Minute Plus pad Power Level pad Stop/Clear pad Start/Touch On pad

Oven Cavity Light Yes

Safety Standard

UL listed FCC Authorized DHHS Rules, CFR, Title 21, Chapter 1, Subchapter J

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R530EWT

Service Manual

CHAPTER 5. GENERAL INFORMATION

[1] GROUNDING INSTRUCTIONS

This oven is equipped with a three prong grounding plug. It must be plugged into a wall receptacle that is properly installed and grounded in accordance with the National Electrical Code and local codes and ordinances.

In the event of an electrical short circuit, grounding reduces the risk of electric shock by providing an escape wire for the electric current.

WARNING:

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

Electrical Requirements

The electrical requirements are a 120 volt 60 Hz, AC only, 15 or 20 amp. 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. A short power-supply cord is provided to reduce risks of becoming entangled in or tripping over a longer cord. Where a two-pronged wallreceptacle is encountered, it is the personal responsibility and obligation of the customer to contact a qualified electrician and have it replaced with a properly grounded three-pronged wall receptacle or have a grounding adapter properly grounded and polarized. If the extension cord must be used, it should be a 3-wire, 15 amp. or higher rated cord. Do not drape over a countertop or table where it can be pulled on by children or tripped over accidentally.

CAUTION: DO NOT UNDER ANY CIRCUMSTANCES CUT OR REMOVE THE ROUND

GROUNDING PRONG FROM THIS PLUG.

[2] OVEN DIAGRAM

1. OVEN

1. One touch door open button.

Push to open door.

2. Door latches.

The oven will not operate unless the door is securely closed.

3. Removable turntable support

4. Removable turntable.

The turntable will rotate clockwise or counterclockwise.

5. Oven lamp.

It will light when oven is operating or door is opened.

6. Oven door with see-through window

7. Ventilation openings. (Rear)

8. Auto-Touch control panel.

9. Time display: Digital display, 99 minutes, 99 seconds.

10.Waveguide cover:

11.Power supply cord.

2. TOUCH CONTROL PANEL

NOTE: Some one-touch cooking features such as “MINUTE

PLUS” are disabled after three minutes when the oven is not in use. These features are automatically enabled when the door is opened and closed or the STOP/ CLEAR pad is pressed.

3-Pronged Plug

Grounded Receptacle Box

Grounding Pin

3-Pronged Receptacle

SENSOR COOKING

LET'S COOK

FROZEN FOODS

Popcorn

Fresh

vegetables

Ground

meat

Sensor reheat

CUSTOM

HELP

Rice

Poultry

Baked

potatoes

Fish

Seafood

Snacks VegetablesEntrees

Defrost

Center

From the

Pantry

Beverage

Center

Breakfast Lunch

15 Minute

Recipes

Power

Level

Minute

Plus

Start

Touch On

Keep Warm

Plus

32145 87690

R-530EW-T/K-T

R-530ES-T

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R530EWT

Service Manual

CHAPTER 6. OPERATION

[1] DESCRIPTION OF OPERATING SEQUENCE

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

1. OFF CONDITION

Closing the door activates the door sensing switch and secondary interlock switch. (In this condition, the monitor switch contacts are opened.)

When oven is plugged in, 120 volts A.C. is supplied to the control unit. (Figure O-1).

1) The display will show “SHARP SIMPLY THE BEST PRESS CLEAR AND PRESS CLOCK”.

To set any program or set the clock, you must first touch the STOP/ CLEAR pad. The display will clear, and " : " will appear.

2. COOKING CONDITION

Program desired cooking time by touching the NUMBER pads. Program the power level (100%) by touching the POWER LEVEL pad once. When the START pad is touched, the following operations occur:

1) The contacts of relays are closed and components connected to the relays are turned on as follows.

(For details, refer to Figure O-2)

2) 120 volts A.C. is supplied to the primary winding of the power transformer and is converted to about 3.64 volts A.C. output on the filament winding, and approximately 2400 volts A.C. on the high voltage winding.

3) The filament winding voltage heats the magnetron filament and the H.V. winding voltage is sent to a voltage doubler circuit.

4) The microwave energy produced by the magnetron is channelled through the waveguide into the cavity feed-box, and then into the cavity where the food is placed to be cooked.

5) Upon completion of the cooking time, the power transformer, oven lamp, etc. are turned off, and the generation of microwave energy is stopped. The oven will revert to the OFF condition.

6) When the door is opened during a cook cycle, the monitor witch, door sensing switch, secondary interlock switch, relay (RY1) and primary interlock relay are activated with the following results. The circuits to the turntable motor, the cooling fan motor, and the high voltage components are de-energized, the oven lamp remains on, and the digital read-out displays the time still remaining in the cook cycle when the door was opened.

7) The monitor switch electrically monitors the operation of the secondary interlock switch and primary interlock relay and is mechanically associated with the door so that it will function in the following sequence.

a) When the door opens from the closed position, the primary

interlock relay (RY2) and secondary interlock switch open their contacts. And contacts of the relay (RY1) remains closed. Then the monitor switch contacts close.

b) When the door is closed from the open position, the monitor

switch contacts open first. Then the contacts of the secondary interlock switch and door sensing switch close. And contacts of the relay (RY1) open.

If the secondary interlock switch and primary interlock relay (RY2) fail with the contacts closed when the door is opened, the closing of the monitor switch contacts will form a short circuit through the monitor fuse, secondary interlock switch, relay (RY1) and primary interlock relay (RY2), causing the monitor fuse to blow.

3. POWER LEVEL P-0 TO P-90 COOKING

When Variable Cooking Power is programmed, the 120 volts A.C. is supplied to the power transformer intermittently through the contacts of relay (RY-2) which is operated by the control unit within a 32 second time base. Microwave power operation is as follows:

NOTE: The ON/OFF time ratio does not correspond with the per-

centage of microwave power, because approx. 3 seconds are needed for heating of the magnetron filament.

4. SENSOR COOKING CONDITION

Using the SENSOR function, the food is cooked without figuring time, power level or quantity. When the oven senses enough steam from the food, it relays the information to its microprocessor which will calculate the remaining cooking time and 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 experiment with each food category and inputted into the LSI.

An example of how sensor works: (POTATOES)

1. Potatoes at room temperature. Vapor is emitted very slowly.

2. Heat potatoes. Moisture and humidity is emitted rapidly. You can smell the aroma as it cooks.;

RELAY CONNECTED COMPONENTS

RY-1 oven lamp/turntable motor/fan motor RY-2 power transformer

VARI-MODE ON TIME OFF TIME 100 PERCENT (100% power) 32 sec. 0 sec. 90 PERCENT (approx. 90% power) 30 sec. 2 sec. 80 PERCENT (approx. 80% power) 26 sec. 6 sec. 70 PERCENT (approx. 70% power) 24 sec. 8 sec. 60 PERCENT (approx. 60% power) 22 sec. 10 sec. 50 PERCENT (approx. 50% power) 18 sec. 14 sec. 40 PERCENT (approx. 40% power) 16 sec. 16 sec. 30 PERCENT (approx. 30% power) 12 sec. 20 sec. 20 PERCENT (approx. 20% power) 8 sec. 24 sec. 10 PERCENT (approx. 10% power) 6 sec. 26 sec. 0 PERCENT (0% power) 0 sec. 32 sec.

MICROWAVE

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3. Sensor detects moisture and humidity and calculates cooking time and variable power.

4.1. Cooking Sequence.

1. Operate the oven in sensor cooking mode by referring to the operation manual.

NOTE: The oven should not be operated on SENSOR immediately

after plugging in the unit. Wait two minutes before cooking on SENSOR.

2. The coil of shut-off relay (RY-1) is energized, the turntable motor, oven lamp and cooling fan motor are turned on, but the power transformer is not turned on.

3. After about 16 seconds, the cook relay (RY-2) is energized. The power transformer is turned on, microwave energy is produced and first stage is started. The 16 seconds is the cooling time required to remove any vapor from the oven cavity and sensor.

NOTE: During this first stage, do not open the door or touch STOP/

CLEAR pad.

4. When the sensor detects the vapor emitted from the food, the display switches over to the remaining cooking time and the timer counts down to zero. At this time, the door may be opened to stir, turn, or season food.

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

6. Opening the door or touching the STOP/CLEAR pad, the time of day will reappear on the display and the oven will revert to an OFF condition.

[2] OVEN SCHEMATIC

1. Off Condition

Figure O-1. Oven Schematic-Off Condition

MICROWAVE

AH SENSOR

SCHEMATIC

NOTE: CONDITION OF OVEN

1. DOOR CLOSED

2. CLOCK APPEARS ON DISPLAY

NOTE: " " indicates components with potentials above 250V

NOISE FILTER

MONITOR

FUSE (20A)

120V AC60 Hz

FAN MOTOR

MONITOR SWITCH

H.V. RECTIFIER

MAGNETRON

TTM

OL FM

CAVITY TEMP. FUSE

MAGNETRON TEMP. FUSE

COM.

COM.N.O.

N.C.

DOOR SENSING SWITCH

(RY-1)

(RY-2) PRIMARY INTERLOCK RELAY

CONTROL UNIT

B1 B2

GRN

POWER TRANSFORMER

CAPACITOR

1.0mF AC 2300V

AH SENSOR

SECONDARY INTERLOCKS WITCH

OVEN LAMP

TURNTABLE MOTOR

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2. Cooking Condition

Figure O-2. Oven Schematic-Cooking Condition

[3] DESCRIPTION AND FUNCTION OF COMPONENTS

1. DOOR OPEN MECHANISM

The door is opened by pushing the open button on the control panel, refer to the Figure D-1. When the open button is pushed, the open button pushes up the switch lever, and then the switch lever pushes up the latch head. The latch heads are moved upward and released from latch hook. Now the door will open.

Figure D-1. Door Open Mechanism.

2. DOOR SENSING AND SECONDARY INTERLOCK SWITCHES

The secondary interlock switch is mounted in the lower position of the latch hook and the door sensing switch in the secondary 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 power to all high voltage components.

A cook cycle cannot take place until the door is firmly closed there by activating both interlock switches. The primary interlock system consists of the door sensing switch and primary interlock relay located on the control circuit board.

3. 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 (RY2) and secondary interlock switch fail to open when the door is opened.

Functions:

1) When the door is opened, the monitor switch contact close (to the ON condition) due to their being normally closed. At this time the primary interlock relay (RY2) and secondary interlock switch are in the OFF condition (contacts open) due to their being normally open contact switches.

2) As the door goes to a closed position, the monitor switch contacts are first opened and then the door sensing switch and the secondary interlock switch contacts close. (On opening the door, each of these switches operate inversely.)

3) If the door is opened, and the primary interlock relay (RY2) and secondary interlock switch contacts fail to open, the monitor fuse blows simultaneously with closing of the monitor switch contacts.

CAUTION: BEFORE REPLACING A BLOWN MONITOR FUSE TEST

THE DOOR SENSING SWITCH, PRIMARY INTERLOCK RELAY (RY2), RELAY (RY1), SECONDARY INTERLOCK SWITCH AND MONITOR SWITCH FOR PROPER OPERATION. (REFER TO CHAPTER “TEST PROCEDURE”).

NOTE: MONITOR FUSE AND MONITOR SWITCH ARE REPLACED

AS AN ASSEMBLY.

SCHEMATIC

NOTE: CONDITION OF OVEN

1. DOOR CLOSED.

2. COOKING TIME PROGRAMMED.

3. VARIABLE COOKING CONTROL "P-HI/ 100 PERCENT".

4. START PAD TOUCHED.

NOISE FILTER

MONITOR

FUSE (20A)

120V AC60 Hz

FAN MOTOR

MONITOR SWITCH

H.V. RECTIFIER

MAGNETRON

TTM

OL FM

CAVITY TEMP. FUSE

MAGNETRON TEMP. FUSE

COM.

COM.N.O.

N.C.

DOOR SENSING SWITCH

(RY-1)

(RY-2) PRIMARY INTERLOCK RELAY

CONTROL UNIT

B1 B2

GRN

POWER TRANSFORMER

CAPACITOR

1.0mF AC 2300V

AH SENSOR

SECONDARY INTERLOCKS WITCH

OVEN LAMP

TURNTABLE MOTOR

Door Sensing Switch

Monitor Switch

Switch Lever

Secondary Interlock Switch

Latch Heads

Door

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4. TURNTABLE MOTOR

The turntable motor rotates the turntable located on the bottom of the oven cavity, so that the foods on the turntable cook evenly during cooking. The turntable may turn in either direction.

5. 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 and cools 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 the exhausting air vents at the oven cavity.

6. CAVITY TEMPERATURE FUSE

The cavity temperature fuse located on the top of the oven cavity, is designed to prevent damage to the oven by fire. If the food load is overcooked, by either error in cook time or defect in the control unit, the cavity temperature fuse will open.

Under normal operation, the cavity temperature fuse remains closed. However, when abnormally high temperatures are reached within the oven cavity, the cavity temperature fuse will open at 302°F(150°C) causing the oven to shut down.

NOTE: This is a fuse. It does not reset.

7. MAGNETRON TEMPERATURE FUSE

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

Under normal operation, the magnetron temperature fuse remains closed. However, when abnormally high temperatures are reached within the magnetron, the magnetron temperature fuse will open at 302°F(150°C) causing the oven to shut down.

NOTE: This is a fuse. It does not reset.

8. MONITOR FUSE

1) The monitor fuse blows when the contacts (COM-NO) of the primary interlock relay (RY2) and secondary interlock switch remain closed with the oven door open and when the monitor switch closes.

2) If the wire harness or electrical components are short-circuited, this monitor fuse blows to prevent an electric shock or fire hazard.

9. NOISE FILER

The noise filter prevents the radio frequency interference that might flow back in the power circuit.

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Service Manual

CHAPTER 7. 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 procedure letter which will be found in the "Test Procedure "section.

IMPORTANT:

If the oven becomes inoperative because of a blown monitor fuse, check the monitor switch, relay (RY1), primary interlock relay (RY2), door sensing switch and secondary interlock switch before replacing the monitor fuse. If the monitor fuse is replaced, the monitor switch must also be replaced. Use part FFS-BA033WRKZ or FFSBA037WRKZ as an assembly.

IMPORTANT:

Whenever troubleshooting is performed with the power supply cord disconnected. It may in, some cases, be necessary to connect the power supply cord after the outer case has been removed, in this event,

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

2) Open the door and block it open.

3) Discharge high voltage capacitor.

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 insulation tape.

6) After that procedure, reconnect the power supply cord.

When the testing is completed,

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

2) Open the door and block it open.

3) Discharge high voltage capacitor.

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

5) Reinstall the outer case (cabinet).

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

7) Run the oven and check all functions.

Never touch any part in the circuit with your hand or an uninsulated tool while the power supply is connected.

RE CK A B C D E F F G H RE RE CK J CK CK CK K L N OI

POSSIBLE CASE

AND DEFECTIVE PARTS

SHORT IN POWER CORD

SHORT OR OPENED WIRING

MAGNETRON

POWER TRANSFORMER

H.V. RECTIFIER ASSEMBLY

HIGH VOLTAGE CAPACITOR

MAGNETRON TEMPERATURE FUSE

PRIMARY INTERLOCK SYSTEM

SECONDARY INTERLOCK SWITCH

MONITOR SWITCH

MONITOR FUSE

OVEN LAMP

COOLING FAN MOTOR

TURNTABLE MOTOR

TOUCH CONTROL PANEL

WRONG OPERATION

LOW VOLTAGE

DIRTY OVEN CAVITY

KEY UNIT

RELAY (RY1)

FOIL PATTERN ON PWB

AH SENSOR

NOISE FILTER

CONDITION

PROBLEM

OFF

CONDITION

TTEST PROCEDURE

COOKING CONDITION

SENSOR COOKING CONDITION

CAVITY

TEMPERATURE FUSE

DEFROST CENTER

Home fuse or circuit breaker blows when power cord is plugged into wall receptacle

Monitor fuse blows when power cord is plugged into wall receptacle.

All letters and indicators do not appear in display when power cord is first plugged into wall outlet.

Display does not operate properly when STOP/CLEAR pad is touched. (Buzzer should sound and " : " or time of day should appear in display.)

Oven lamp does not light when door is opened.

Oven lamp does not go out when door is closed.

Oven lamp lights but fan motor and turntable motor do not operate.

Oven does not go into cook cycle when START pad is touched

Oven seems to be operating but little or no heat is produced in oven load. (Food incompletely cooked or not cooked at all at end of cook cycle.)

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

Oven does not cook properly when programmed for Cooking Power 50 PERCENT mode. (Operates properly on Cooking Power 100 PERCENT mode.)

Oven goes into DEFROST but food is not defrosted well.

AH sensor does not end during Sensor cooking condition. (Oven does not shut off after a cup of water is boiling by sensor cooking.)

Oven stops at 16 sec. after starting.

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Service Manual

CHAPTER 8. TEST PROCEDURES

[1] A: MAGNETRON ASSEMBLY TEST

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

2. Open the door and block it open.

3. Discharge high voltage capacitor.

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 1 ohm.

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 and must be replaced.

6. Reconnect all leads removed from components during testing.

7. Reinstall the outer case (cabinet).

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

9. Run the oven and check all functions.

1. MICROWAVE OUTPUT POWER

The following test procedure should be carried out with the microwave oven in a fully assembled 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: silicon rectifier, high voltage capacitor and power transformer. This test will require a 16 ounce (453cc) measuring cup and an accurate mercury thermometer or thermocouple type temperature tester. For accurate results, the following procedure must be followed carefully:

1. Fill the measuring cup with 16 oz. (453cc) 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.

2. Place the cup of water in the oven. Operate oven at 100% PERCENT POWER selecting more than 60 seconds cook time. Allow the water to heat for 60 seconds, measuring with a stop watch, second hand of a watch or the digital read-out countdown.

3. 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.

4. Subtract the cold water temperature from the hot water temperature. The normal result should be 33 to 62°F(18.6 to 34.5°C) rise in temperature. If the water temperatures are accurately measured and 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 cooking 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.

[2] B: POWER TRANSFORMER TEST

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

2. Open the door and block it open.

3. Discharge 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 ohm and the resistance of the high voltage coil should be approximately 105 ohms; the resistance of the filament coil should be less than 1 ohm.

5. Reconnect all leads removed from components during testing.

6. Reinstall the outer case (cabinet).

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

8. Run the oven and check all functions.

(HIGH VOLTAGES ARE PRESENT AT THE HIGH VOLTAGE TERMINAL, SO DO NOT ATTEMPT TO MEASURE THE FILAMENT AND HIGH VOLTAGE.)

[3] C: HIGH VOLTAGE RECTIFIER TEST

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

2. Open the door and block it open.

3. Discharge high voltage capacitor.

4. Isolate the rectifier from the circuit. Using the highest ohm scale of 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 directions, or if an infinite resistance is read in both directions, the rectifier is probably defective and should be replaced.

5. Reconnect all leads removed from components during testing.

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6. Reinstall the outer case (cabinet).

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

8. Run the oven and check all functions.

NOTE: Be sure to use an ohmmeter that will supply a forward bias voltage of more than 6.3 volts.

[4] D: HIGH VOLTAGE CAPACITOR TEST

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

2. Open the door and block it open.

3. Discharge high voltage capacitor.

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

5. Reconnect all leads removed from components during testing.

6. Reinstall the outer case (cabinet).

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

8. Run the oven and check all functions.

[5] E: TEMPERATURE FUSE OR THERMAL CUT-OUT TEST

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

2. Open the door and block it open.

3. Discharge high voltage capacitor.

4. Check a continuity across the temperature fuse or thermal cut-out terminals in the table below.

5. An open temperature fuse or thermal cut-out (Magnetron) indicates overheating of the magnetron. Check for restricted air flow to the magnetron, especially the cooling fan and air guide.

An open temperature fuse or thermal cut-out (Cavity) indicates overheating of the oven, exchange the temperature fuse or thermal cut-out and check inside of oven cavity and for improper setting of cooking time or operation of control unit. Check for restricted air flow through the vent holes of the oven cavity, especially the cooling fan and air guide.

6. Reconnect all leads removed from components during testing.

7. Reinstall the outer case (Cabinet).

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

9. Run the oven and check all functions.

CAUTION: IF THE TEMPERATURE FUSE OR THERMAL CUT-OUT INDICATES AN OPEN CIRCUIT AT ROOM TEMPERATURE, REPLACE IT.

[6] F: SECONDARY INTERLOCK SWITCH AND PRIMARY INTERLOCK SYSTEM TEST

1. SECONDARY INTERLOCK SWITCH

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

2. Open the door and block it open.

3. Discharge high voltage capacitor.

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.

5. Reconnect all leads removed from components during testing.

6. Reinstall the outer case (cabinet).

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

8. Run the oven and check all functions.

Table: Temperature Fuse and Thermal Cut-out Test

Parts Name

Temperature of “ON” condition

(closed circuit).

Temperature of “OFF” condition

(open circuit).

Indication of ohmmeter (When room

temperature is approx. 20°C.) Temperature fuse 150°C This is not resetable type. Above 150°C (302°F) Closed circuit Thermal cut-out 145°C This is not resetable type. Above 145°C (293°F) Closed circuit

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2. PRIMARY INTERLOCK SYSTEM

2.1. DOOR SENSING SWITCH

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

2. Open the door and block it open.

3. Discharge high voltage capacitor.

5. Reconnect all leads removed from components during testing.

6. Reinstall the outer case (cabinet).

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

8. Run the oven and check all functions.

NOTE: If the door sensing switch contacts fail in the open position and the door is closed, the cooling fan, turntable and oven light will be activated by

RY1.

2.2. PRIMARY INTERLOCK RELAY (RY2)

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

2. Open the door and block it open.

3. Discharge high voltage capacitor.

4. Disconnect two (2) wire leads from the male tab terminals of the Primary Interlock Relay. Check the state of the relay contacts using a ohmmeter. The relay contacts should be open. If the relay contacts are closed, replace the circuit board entirely or the relay itself.

5. Reconnect all leads removed from components during testing.

6. Reinstall the outer case (cabinet).

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

8. Run the oven and check all functions.

[7] G: MONITOR SWITCH TEST

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

2. Open the door and block it open.

3. Discharge high voltage capacitor.

4. Before performing this test, make sure that the secondary interlock switch and the primary interlock relay are operating properly, according to the above Switch Test Procedure. Disconnect the wire lead from the monitor switch (COM) terminal. Check the monitor switch operation by using the ohmmeter as follows. When the door is open, the meter should indicate a closed circuit. When the monitor switch actuator is pushed by a screw driver through the lower 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. If improper operation is indicated, the switch may be defective. After testing the monitor switch, reconnect the wire lead to the monitor switch (COM) terminal and check the continuity of the monitor circuit.

5. Reconnect all leads removed from components during testing.

6. Reinstall the outer case (cabinet).

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

8. Run the oven and check all functions.

[8] H: BLOWN MONITOR FUSE TEST

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

2. Open the door and block it open.

3. Discharge high voltage capacitor.

4. If the monitor fuse is blown when the door is opened, check the secondary interlock switch, primary interlock relay (RY2), relay (RY1) and monitor switch according to the “TEST PROCEDURE” for those switches before replacing the blown monitor fuse.

CAUTION: BEFORE REPLACING A BLOWN MONITOR FUSE, TEST THE SECONDARY INTERLOCK SWITCH, PRIMARY INTERLOCK RELAY,

DOOR SENSING SWITCH AND MONITOR SWITCH FOR PROPER OPERATION.

If the monitor fuse is blown by improper switch operation, the monitor fuse and monitor switch must be replaced with “monitor fuse and monitor switch assembly” part number FFS-BA033WRKZ or FFS-BA037WRKZ, even if the monitor switch operates normally. The monitor fuse and monitor switch assembly is comprised of a 20 ampere fuse and switch.

5. Reconnect all leads removed from components during testing.

Secondary Interlock Switch

Monitor Switch

Screw Driver

Ohmmeter

Red

White/ White

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6. Reinstall the outer case (cabinet).

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

8. Run the oven and check all functions.

[9] I: NOISE FILTER TEST

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

2. Open the door and block it open.

3. Discharge high voltage capacitor.

4. Disconnect the lead wires from the terminal the noise filter. Using an ohmmeter, check between the terminals as described in the following table. If incorrect readings are obtained, replace the noise filter.

5. Reconnect all leads removed from components during testing.

6. Reinstall the outer case (cabinet).

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

8. Run the oven and check all functions.

[10] J: TOUCH CONTROL PANEL ASSEMBLY TEST

The touch control panel consists of circuits including semiconductors such as LSI, ICs, etc. Therefore, unlike conventional microwave ovens, proper maintenance cannot 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 Key Unit, and also the Control Unit is divided into two units, CPU Unit and Power Unit, and troubleshooting by unit replacement is described according to the symptoms indicated.

Before testing,

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

2) Open the door and block it open.

3) Discharge high voltage capacitor.

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 insulation tape.

1. Key Unit

NOTE:

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

2) Reconnect the power supply cord after the outer case is installed.

3) Run the oven and check all functions.

The following symptoms indicate a defective 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.

2. Control Unit.

The following symptoms indicate a defective control unit.

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) 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.

MEASURING POINT INDICATION OF OHMMETER Between N and L Approx. 470kΩ Between terminal N and GRAY Short circuit. Between terminal L and RED Short circuit.

FUSE 20A

RESISTOR 470k

NOISE FILTER

NOISE SUPPRESSION COIL

LINE CROSS CAPACITOR

1.0μF / AC 250V

LINE BYPASS

CAPACITOR

0.0033μF / AC 250V

LINE BYPASS

CAPACITOR

0.0033μF / AC 250V

LOAD

SOURCE

GRAY

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g) The figure of all digits flicker.

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.

3. If the Key unit or the Control unit is defective.

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

2) Open the door and block it open.

3) Discharge high voltage capacitor.

4) Replace the Control unit assembly.

5) Reconnect all leads removed from components during testing.

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

7) Reconnect the power supply cord after the outer case is installed.

8) Run the oven and check all functions.

4. When testing is completed,

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

2) Open the door and block it open.

3) Discharge high voltage capacitor.

4) Reconnect all leads removed from components during testing.

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

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

7) Run the oven and check all functions.

[11] K: KEY UNIT TEST

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

2. Open the door and block it open.

3. Discharge high voltage capacitor.

4. If the display fails to clear when the STOP/CLEAR pad is depressed, first verify the flat ribbon cable is making good contact, verify that the door sensing switch (stop switch) operates properly; that is the contacts are closed when the door is closed and open when the door is open. If the door sensing switch (stop switch) is good, disconnect the flat ribbon cable 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 connecter).

Use the Key unit matrix indicated on the control panel schematic and place a jumper wire between the pins that correspond to the STOP/CLEAR pad making momentary contact. If the control unit responds by clearing with a beep the key unit is faulty and must be replaced. If the control unit does not respond, it is faulty and must be replaced. If a specific pad does not respond, the above method may be used (after clearing the control unit) to determine if the control unit or key pad is at fault.

5. Reconnect all leads removed from components during testing.

6. Reinstall the outer case (cabinet).

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

8. Run the oven and check all functions.

[12] L: RELAY TEST

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

2. Open the door and block it open.

3. Discharge high voltage capacitor.

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 insulation tape.

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

G1 G2 G3 G4 G5 G6 G7 G8

G10

G11

G12

G13 G14

Fresh

vegetables

Beverage

Center

Breakfast Lunch

Popcorn

Snacks

From the

Pantry

Start

Touch On

Fish

Seafood

Power

Level

Keep

Warm

Plus

Minute

Recipes

Defrost

Center

Custom

Help

Baked

potatoes

Sensor

reheat

Minute

Plus

Vegetables

Rice

Poultry

Ground

meat

Entrees

Timer Clock

Stop

Clear

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7. Remove the outer case and check voltage between the cabinet side terminal of the relay RY1 and Pin No. 1 of 2 pin connector (A) on the control unit with an A.C. voltmeter.

The meter should indicate 120 volts, if not check oven circuit.

RY1 and RY2 Relay Test

These relays are operated by D.C. voltage

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

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

DC. voltage not indicated ........... Check diode which is connected to the relay coil. If diode is good, control unit is defective.

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

9. Open the door and block it open.

10.Discharge high voltage capacitor.

11.Reconnect all leads removed from components during testing.

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

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

14.Run the oven and check all functions.

[13] M: DEFROST CENTER TEST

WARNING: The oven should be fully assembled before following procedure.

1. Open the door.

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

3. Close the door, touch the Defrost Center pad and touch the number pad 5. And touch the number pad 5 again. And touch the Start pad.

4. The oven is in Defrost cooking condition.

5. The oven will operate as follows.

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

[14] N: 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, this foil pattern acts as a fuse.

1. Foil pattern check and repairs.

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

2) Open the door and block it open.

3) Discharge high voltage capacitor.

4) Follow the troubleshooting guide given below for repair.

5) Make a visual inspection of the varistor. Check for burned damage and examine the transformer with a tester for the presence of layer short-circuit (check the primary coil resistance which is approximately 210Ω±15%). If any abnormal condition is detected, replace the control unit.

6) Reconnect all leads removed from components during testing.

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

8) Reconnect the power supply cord after the outer case is installed.

9) Run the oven and check all functions.

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

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

2) Open the door and block it open.

RELAY SYMBOL OPERATIONAL VOLTAGE CONNECTED COMPONENTS

RY1 Approx. 24.0V D.C. Oven lamp / Turntable motor / Cooling fan motor RY2 Approx. 23.0V D.C. Power transformer

MENU 1ST STAGE 2ND STAGE

Steaks/Chops or Fish LEVEL TIME LEVEL TIME

0.5lb 70% 30sec. 40% 15sec.

STEPS OCCURRENCE CAUSE OR CORRECTION

1 Only pattern at “a” is broken. *Insert jumper wire J1 and solder. 2 Pattern at “a” and “b” are broken. Replace the control unit.

VRS1

OMIF

CN-A

(J1)

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3) Discharge high voltage capacitor.

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 insulation tape.

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

7) Follow the troubleshooting guide given below for repair.

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

9) Open the door and block it open.

10)Discharge high voltage capacitor.

11)Reconnect all leads removed from components during testing.

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

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

14)Run the oven and check all functions.

[15] O: AH SENSOR TEST

Checking the initial sensor cooking condition

WARNING: The oven should be fully assembled before following procedure.

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

2) Room temperature should not exceed 35°C.

3) The unit should not be installed in any area 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”.

4) Exhaust vents are provided on the back 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 of by the spray and turn off before food is properly cooked.

8) After the oven is started on sensor cooking condition, if the sensor has not detected the vapor of the food, ERROR will appear and the oven will shut off.

Water load cooking test

WARNING: The oven should be fully assembled before following procedure.

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

1) Fill approximately 200 milliliters 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) Touch the TIMER/CLOCK pad once, the POWER LEVEL pad twice and the START pad once. And touch the number pad 1. Now, the oven is in the sensor cooking condition, and “TEST”, “SENSOR” and “COOK” will appear in the display.

5) 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 pad is touched during first stage of sensor cooking.

6) After approximately 16 seconds, microwave energy is produced.

If ERROR is displayed or the oven does not turn off, replace the AH sensor or check the control unit, refer to explanation below.

1. 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 replacement sensor.

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

2) Open the door and block it open.

3) Discharge high voltage capacitor.

4) Remove the AH sensor.

5) Install the new AH sensor.

STEPS OCCURRENCE CAUSE OR CORRECTION

The rated AC voltage is not present between the cabinet side terminal of the relay RY1 and the Pin No. 1 of the 2-pin connector (A).

Check supply voltage and oven power cord.

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

Low voltage transformer or secondary circuit defective. Check and replace control unit.

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6) Reconnect all leads removed from components during testing.

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

8) Reconnect the power supply cord after the outer case is installed.

9) Reconnect the oven to the power supply and check the sensor cook operation as follows:

a) Fill approximately 200 milliliters 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) Touch the TIMER/CLOCK pad once, the POWER LEVEL pad twice and the START pad once. And touch the number pad 1 once.

e) The control panel is in automatic Sensor operation.

f) The oven turns off automatically, and the time for detecting moisture will be displayed.

If new sensor does not operate properly, the problem is with the control unit, and refer to explanation below.

2. CHECKING CONTROL UNIT

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

2) Open the door and block it open.

3) Discharge high voltage capacitor.

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

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

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

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

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

9) Check the sensor cook operation proceed as follows:

a) Close the door. Touch the TIMER/CLOCK pad once, the POWER LEVEL pad twice and the START pad once. And touch the number pad 1

once.

b) The control panel is in the sensor cooking operation.

c) After approximately 25 seconds, push plunger of select switch for more than 3 seconds. This condition is same as judgement by AH sensor.

d) After approximately 3 seconds, the display shows “X X. X X “ which is the time for detecting moisture.

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

If the above is proper, the AH sensor is probably defective.

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

11)Open the door and block it open.

12)Discharge high voltage capacitor.

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

14)Carry out necessary repair.

15)Reconnect all leads removed from components during testing and repairing.

16)Re-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 “Water load cooking test” again and ensure that the oven works properly.

R1,R2:22Ω±1% 1/2W

R3:4.3kΩ±?5% 1/4W

R4:1MΩ±5% 1/4W

Sensor Dummy Resistor Circuit

Plunger

COM

R3 R4

F-1 F-2

F-3

To connector (F) on Control Unit.

CONNECTOR

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CHAPTER 9. TOUCH CONTROL PANEL ASSEMBLY

[1] OUTLINE OF TOUCH CONTROL PANEL

The touch control section consists of the following units.

(1) Key Unit

(2) Control Unit (The Control Unit consists of Power Unit and CPU Unit).

The principal functions of these units and the signals communicated among them are explained below.

1. Key Unit

The key unit is composed of a matrix, signals generated in the LSI are sent to the key unit through P00-P07. When a key pad is touched, a signal is completed through the key unit and passed back to the LSI through P17, P16,P15, P14, AIN7 and AIN6 to perform the function that was requested.

2. Control Unit

Control unit consists of LSI, reset circuit, indicator circuit, power source circuit, relay circuit, buzzer circuit, synchronizing signal circuit, absolute humidity sensor circuit and back light circuit.

1) Reset Circuit

This circuit generates a signal which resets the LSI to the initial state when power is supplied.

2) Indicator Circuit

This circuit consists of 40 segments and 16 common electrodes using a Liquid Crystal Display. The Liquid Crystal Display (LCD) is drived by LCD driver IC3.

3) Power Source Circuit

This circuit generates voltages 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.

4) Relay Circuit

A circuit to drive the magnetron, fan motor, turntable motor and light the oven lamp.

5) Buzzer Circuit

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

6) Synchronizing Signal Circuit

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

7) Door sensing Switch

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

8) Back Light Circuit

A circuit to drive the back light (Light emitting diodes LD10- LD15).

9) Absolute Humidity Sensor Circuit

This circuit detects moisture of the cooking food to allow its automatic cooking.

Symbol Voltage Application

VSS -5V LSI (IC1)

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[2] ABSOLUTE HUMIDITY SENSOR CIRCUIT

1. 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 in the open vessel. Each sensor is provided with the protective cover made of metal mesh to be protected from the external airflow.

2. Operational Principle of Absolute Humidity Sen-

sor

The figure below shows the basic structure of an absolute humidity sensor. A bridge circuit is formed by two thermistors and two resistors (R1 and R2).The output of the bridge circuit is to be amplified by the operational amplifier.Each thermistor is supplied with a current to keep it heated at about 150°C, the resultant heat is dissipated in the air and if the two thermistors are placed in different humidity conditions they show different degrees of heat conductivity leading to a potential difference between them causing an output voltage from the bridge circuit, the intensity of which is increased as the absolute humidity of the air increases.Since the output is very minute, it is amplified by the operational amplifier.

3. Detector Circuit of Absolute Humidity Sensor Cir-

cuit

This detector circuit is used to detect the output voltage of the absolute humidity circuit to allow the LSI to control sensor cooking of the unit. When the unit is set in the sensor cooking mode, 16 seconds clearing cycle occurs than the detector circuit starts to function and the LSI observes the initial voltage available at its AIN5 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 R98 ~ R102. Changing the resistance values results in that there is the same potential at both F-3 terminal of the absolute humidity sensor and AIN4 terminal of the LSI. The voltage of AIN5 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 AIN5 terminal of theLSI.

Then the LSI observes that voltage at AIN5 terminal and compares it with its initial value, and when the comparison rate reaches the preset value (fixed for each menu to be cooked), the LSI causes the unit to stop sensor cooking; thereafter, the unit goes in the next operationautomatically.When the LSI starts to detect the initial voltage at AN1terminal 16 seconds after the unit has been put in the Sensor Cooking mode, if it is not possible to balance the bridge circuit due to disconnection of the absolute humidity sensor, ERROR will appear on the display and the cooking is stopped.

1)Absolute humidity sensor circuit

Ventilation opening for sensing

Sensing part (Open vessel)

Sensing part (Closed vessel)

Thermistors

Operational amplifie r

Output volta ge

S:Thermistor

openvessel

C:Thermistor

closed vessel

Ab s o lute hu mi dity ( g/m )

tvoltage

Ab s o lute hu mi dity vs , output voltage cha rac teristic

SW1

SW2

SW3

SW4

SW5

P20

P21

P22

P23

P24

LSI

(IC1)

AIN4

AIN5

620k

300k

150k

75k

37.4k

47k

10k

1234

8765

0.01uF

0.015uF

0.01

VA : -15V

R90

C90

C91

C93

C92

F-2

1.8k

IC2

F-1

F-3

3.57k

3.32k

VC : -5V

0.1

C. Thermistor in

closed vessel

S. Thermistor in

open vessel

R98

R99

R96

R91

360k

R93

R92

R94

R95

D90

R100

R101

R102

R97

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[3] SERVICING FOR TOUCH CONTROL PANEL

1. Precautions for Handling Electronic Components

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 influenced by the surrounding high voltage power source, 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.

1) When storing and transporting, thoroughly wrap them in aluminium foil. Also wrap PW boards containing them in aluminium foil.

2) When soldering, ground the technician as shown in the figure and use grounded soldering iron and work table.

2. 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. Servicing the touch control panel with power supply of the oven:

CAUTION: THE HIGH VOLTAGE TRANSFORMER OF THE MICRO-

WAVE OVEN IS STILL LIVE DURING SERVICING AND PRESENTS A HAZARD.

Therefore, before checking the performance of the touch control panel,

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

2) Open the door and block it open.

3) Discharge high voltage capacitor.

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 insulation tape.

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

After checking the performance of the touch control panel,

1) Disconnect the power supply cord.

2) Open the door and block it open.

3) Re-connect the leads to the primary of the power transformer.

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

5) Re-connect the power supply cord after the outer case is

installed.

6) Run the oven and check all functions.

a) On some models, the power supply cord between the touch

control panel and the oven itself is so short that the two can't be separated. For those models, check and repair all the controls (sensor-related ones included) of the touch control panel while keeping it connected to the oven.

b) On some models, the power supply cord between the touch

control panel and the oven proper is so 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 sensorrelated controls of the touch control panel, checking them is possible if the dummy resistor(s) with resistance equal to that of the controls are used.

2. Servicing the touch control panel with power supply from an external power source:

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 brings about 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).

3. Servicing Tools

Tools required to service the touch control panel assembly.

1) Soldering iron: 60W

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

2) Oscilloscope: Single beam, frequency range: DC - 10MHz type or more advanced model.

3) Others: Hand tools

4. Other Precautions

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

2) Connect the connector of the key unit to the control unit being sure that the lead wires are not twisted.

3) After aluminium 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 precision is required.

approx. 1M ohm

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CHAPTER 10. PRECAUTIONS FOR USING LEAD-FREE SOLDER

Employing lead-free solder

The “Main PWB” of this model employs lead-free solder. This is indicated by the “LF” symbol printed on the PWB and in the service manual. The suffix letter indicates the alloy type of the solder.

Example:

Using lead-free wire solder

When repairing a PWB with the “LF” symbol, only lead-free solder should be used. (Using normal tin/lead alloy solder may result in cold soldered joints and damage to printed patterns.)

As the melting point of lead-free solder is approximately 40°C higher than tin/lead alloy solder, it is recommend that a dedicated bit is used, and that the iron temperature is adjusted accordingly.

Soldering

As the melting point of lead-free solder (Sn-Ag-Cu) is higher and has poorer wet ability, (flow), to prevent damage to the land of the PWB, extreme care should be taken not to leave the bit in contact with the PWB for an extended period of time. Remove the bit as soon as a good flow is achieved. The high content of tin in lead free solder will cause premature corrosion of the bit. To reduce wear on the bit, reduce the temperature or turn off the iron when it is not required.

Leaving different types of solder on the bit will cause contamination of the different alloys, which will alter their characteristics, making good soldering more difficult. It will be necessary to clean and replace bits more often when using lead-free solder. To reduce bit wear, care should be taken to clean the bit thoroughly after each use.

Indicates lead-free solder of tin, silver and copper

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CHAPTER 11. COMPONENT REPLACEMENT AND ADJUSTMENT PROCE-

DURE

[1] WARNINGS

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

[2] OUTER CASE REMOVAL

To remove the outer case, procedure as follows.

1. Disconnect the power supply cord.

2. Open the oven door and block it open.

3. Remove the two (2) screws from the lower portion of the rear cabinet using a T20H Torx type or GTXH20-100 screw driver.

4. Remove the remaining three (3) screws from rear.

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

6. Lift entire outer case from the unit.

Microwave ovens contain circuitry capable of producing very high voltage and current, contact with following parts may result in severe, possibly fatal, electric shock. (Example) High Voltage Capacitor, Power Transformer, Magnetron, High Voltage Rectifier Assembly, High Voltage Harness etc..

WARNING:

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

WARNING AGAINST HIGH VOLTAGE:

1. Disconnect the power supply cord.

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

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

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

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 system.

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

7. There is visible damage to the oven.

Do not operate the oven:

1. Without the RF gasket (Magnetron).

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

3. If the door is not closed.

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

To prevent an electric shock, take the following precautions.

1. Before wiring,

1) Disconnect the power supply cord.

2) Open the door block it open.

3) Wait for 60 seconds, then discharge the high voltage capacitor.

2. Do not let the wire leads touch to 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, Power transformer and Oven cavity.

WARNING FOR WIRING

3) Sharp edge: Bottom plate, Oven cavity, Waveguide flange, Chassis support and other metallic plate.

4) Movable parts (to prevent a fault) Fan blade, Fan motor, Switch, Switch lever, Open button.

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

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

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

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CAUTION: DISCONNECT OVEN FROM POWER SUPPLY BEFORE

REMOVING OUTER CASE.

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

NOTE: When replacing the outer case, the 2 special Torx screws

must be reinstalled in the same locations.

[3] POWER TRANSFORMER REMOVAL

1. REMOVAL

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

2. Open the oven door and block it open.

3. Discharge high voltage capacitor.

4. Disconnect wire leads (primary) from power transformer and the filament leads from the magnetron and capacitor terminals.

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

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

7. Remove transformer from bottom plate.

2. REINSTALLATION

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

2. Secure transformer with two (2) screws to bottom plate.

3. Reconnect the wire leads (primary) to power transformer and filament leads of transformer to magnetron and high voltage capacitor.

4. Reconnect the high voltage lead of the power transformer to the high voltage capacitor. Refer to “PICTORIAL DIAGRAM”.

5. Reinstall outer case and check that oven is operating properly.

[4] HIGH VOLTAGE RECTIFIER AND HIGH VOLTAGE CAPACITOR REMOVAL

To remove the components, proceed as follows.

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

2. Open the oven door and block it open.

3. Discharge high voltage capacitor.

4. Disconnect the high voltage wire of the power transformer from the high voltage capacitor.

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

6. Disconnect the filament lead (short one) of the power transformer from the high voltage capacitor.

7. Remove the one (1) screw holding capacitor holder to the base plate.

8. Remove the one (1) screw holding high voltage rectifier to the capacitor holder.

9. Disconnect rectifier terminal from capacitor. high voltage rectifier assembly is now free.

10.Remove capacitor holder. Capacitor is now free.

CAUTION: WHEN REPLACING HIGH VOLTAGE RECTIFIER AND

HIGH VOLTAGE CAPACITOR, GROUND SIDE TERMINAL OF THE HIGH VOLTAGE RECTIFIER MUST BE SECURED FIRMLY WITH A GROUNDING SCREW.

[5] MAGNETRON REMOVAL

1. REMOVAL

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

2. Open the oven door and block it open.

3. Discharge high voltage capacitor.

4. Disconnect all wire leads from magnetron.

5. Remove the two (2) screws holding the chassis support to the magnetron and the oven cavity front flange.

6. Slide the magnetron duct slightly so that the two (2)screws at left hand side of the magnetron appear.

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

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

9. Now, the magnetron is free.

2. REINSTALLATION

1. Re-install the magnetron to waveguide flange with car to prevent damage to the magnetron antenna.

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

3. Hold the chassis support to the oven cavity front plate and the magnetron with the two (2) screws.

4. Reconnect the wire leads to the magnetron. Refer to “PICTORIAL DIAGRAM”.

5. Reinstall outer case and check that the oven is operating properly.

CAUTION: WHEN REPLACING MAGNETRON, BE SURE THE R.F.

GASKET IS IN PLACE AND MOUNTING SCREWS ARE TIGHTENED SECURELY.

Special screw

Screw Driver (Type: TORX T20 H or GTXH20-100)

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11 – 3

[6] OVEN LAMP REMOVAL

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

2. Open the oven door and block it open.

3. Discharge high voltage capacitor.

4. Disconnect the wire leads from the oven lamp.

5. Remove the one (1) screw holding the oven lamp to the magnetron duct.

6. Remove the oven lamp from the magnetron duct.

7. Now, the oven lamp is free.

Figure C-1. Oven lamp

[7] POSITIVE LOCK CONNECTOR (NO-CASE TYPE) REMOVAL

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

2. Open the door and block it open.

3. Discharge high voltage capacitor.

4. Push the lever of positive lock® connector.

5. Pull down on the positive lock® connector.

CAUTION: WHEN CONNECTING THE POSITIVE LOCK®

CONNECTORS TO THE TERMINALS, INSTALL THE POSITIVE LOCK® SO THAT THE LEVER FACES YOU

[8] CONTROL PANEL ASSEMBLY REMOVAL

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

2. Open the door and block it open.

3. Discharge high voltage capacitor.

4. Disconnect the wire leads from panel components.

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

6. Slide the control panel assembly upward and remove it.

7. Now, individual components can be removed.

NOTE: 1) Before attaching a new key unit, wipe off remaining adhe-

sive on the control panel frame surfaces completely with a soft cloth soaked in alcohol.

2) When attaching the key unit to the control panel frame, adjust the upper edge and right edge of the key unit to the correct position of control panel frame.

3) Stick the key unit firmly to the control panel frame by rubbing with soft cloth so not to scratch.

1. CPU UNIT

NOTE: Handle the CPU unit carefully so that there is no excessive

force applied to the ribbon connection.

CPU unit

[9] TURNTABLE MOTOR REMOVAL

1. Disconnect the power supply cord.

2. Remove turntable and turntable support from oven cavity.

3. Lay the oven on it's backside. Remove the turntable motor cover by snipping off the material in four corners.

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

5. Disconnect wire leads from turntable motor.

(See “Positive lock® connector removal”)

6. Remove one (1) screw holding turntable motor to oven cavity.

7. Now, the turntable motor is free.

8. After replacement use the one (1) screw XOTS740P10000 to fit the turntable motor cover.

[10] COOLING FAN MOTOR REMOVAL

1. REMOVAL

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

2. Open the door and block it open.

3. Discharge high voltage capacitor.

4. Disconnect the wire leads from the fan motor.

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

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

7. Hold the edge of the rotor of the fan motor by using a pair of groove joint pliers.

Oven lamp

Terminal

Push

Pull down

Lever

Positive lock¨ connector

Figure C-1. Positive lock® connector

Printed wiring board

of CPU unit

Liquid Crystal

Display (LCD)

Ribbon cable

Page 29

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11 – 4

CAUTION: Make sure that no metal pieces 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 injured.

Do not disfigure the bracket by touching with the pliers.

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

9. Now, the fan blade will be free.

CAUTION: Do not reuse the removed fan blade because the hole

(for shaft) may be larger than normal.

2. REINSTALLATION

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

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

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

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

CAUTION: Do not hit the fan blade strongly when installed

because the bracket may be disfigured.

Make sure that the fan blade rotates smooth after installation.

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

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

6. Connect the wire leads to the magnetron and fan motor, referring to the pictorial diagram.

[11] DOOR SENSING SWITCH/SECONDARY INTERLOCK SWITCH AND MONITOR SWITCH REMOVAL

1. REMOVAL

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

2. Open the door and block it open.

3. Discharge high voltage capacitor.

4. Disconnect wire leads from the switches.

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

6. Remove latch hook assembly from oven flange.

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

8. Switch is now free.

At this time switch lever will be free, do not lose it.

2. REINSTALLATION

1. Re-install each switch in its place. The secondary interlock/ monitor switches are in the lower position and the door sensing switch is in the upper position.

2. Reconnect wire leads to each switch. Refer to pictorial diagram.

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

4. Make sure that the monitor switch is operating properly and check continuity of the monitor circuit. Refer to chapter “Test Procedure” and Adjustment procedure.

[12] DOOR SENSING SWITCH/SECONDARY INTERLOCK SWITCH AND MONITOR SWITCH ADJUSTMENT

1. Adjustment

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

2. Open the door and block it open.

3. Discharge high voltage capacitor.

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.

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

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

6. Secure the screws with washers firmly.

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

Gap

Rotor

Bracket

Stator

Groove joint pliers

Coil

Shaft

Axis

Stator

Rotor

These are the positions that should be pinched with pliers.

Shaft

Table

Center of bracket

Rear View

Side View

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11 – 5

2. After adjustment, check the following.

1. In and out play of door remains less than 0.5mm when in the latched position. First check upper position of latch hook, pushing and pulling upper portion of door toward the oven face.

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

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

3. Monitor switch contacts close when door is opened.

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

Figure C-3. Latch Switch Adjustments

[13] DOOR REPLACEMENT

1. REMOVAL

1. Disconnect oven from power supply.

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

3. Insert a putty knife (thickness of about 0.5mm) into the gap between the choke cover and door frame as shown in Figure C-4 to free engaging parts.

4. Pry the choke cover by inserting a putty knife as shown Figure C-4.

5. Release choke cover from door panel.

6. Now choke cover is free.

NOTE: When carrying out any repair to the door, do not bend or

warp the slit choke (tabs on the door panel assembly) to prevent microwave leakage.

Figure C-4. Door Disassembly

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

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

9. Release door panel from tweleve (12) tabs of door frame.

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

11.Tear sealer film from door panel.

12.Now, door panel is free.

13.Remove door screen from door frame.

14.Now, door screen is free.

2. REINSTALLATION

1. Reinstall door screen to door frame.

2. Put sealer film on door panel. Refer to “Sealer Film” about how to handle new one.

3. Reinstall door panel to door frame by fitting tweleve (12) tabs of door frame to tweleve (12) holes of door panel.

4. Reinstall the latch spring to the latch head. Reinstall the latch spring to the door frame. Reinstall latch head to door frame.

5. Catch two (2) pins of door panel on two (2) hole of upper and lower oven hinges as shown Figure C-5.

6. Reinstall choke cover to door panel by pushing

NOTE: After any service to the door;

1) Make sure that door sensing switch and secondary interlock

switch are operating properly. (Refer to chapter “Test Procedures”.).

2) An approved microwave survey meter should be used to

assure compliance with proper microwave radiation emission limitation standards.

3. After any service, make sure of the following:

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

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

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

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

NOTE: The door on a microwave oven is designed to act as an

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

Figure C-5. Door Replacement

Door Sensing Switch

Monitor Switch

Switch Lever

Secondary Interlock Switch

Latch Heads

Door

Door Frame

Putty Knife

Choke Cover

Upper oven hinge

Lower oven hinge

Choke cover

Door assembly

Page 31

R530EWT

11 – 6

4. SEALER FILM

1. Put the adhesive tape on the backing film of the sealer film as shown in Fig. C-6.

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

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

Figure C-6. Sealer film

Sealer film

Backing film

Adhesive tape

Page 32

R530EWT

12 – 1

R530EWT

Service Manual

CHAPTER 12. CIRCUIT DIAGRAMS

[1] Pictorial Diagram

Figure S-1. Pictorial Diagram

HIGH

VOLTAGE

CAPACITOR

H.V. RECTIFIER

HIGH VOLTAGE COMPONENTS

OVEN LAMP

MAGNETRON

COM.

MONITOR

SWITCH

N.C.

SECONDARY

INTERLOCK

SWITCH

TURNTABLE

MOTOR

POWER

TRANSFORMER

COM.

BLU

RED

GRY

ORG

WHT

ORG

WHT

BRN

BLU

RED

BLU

BLK

MAGNETRON TEMP FUSE

CAVITY TEMP FUSE

FAN MOTOR

RED

BLK

GRY

ORG

BLU

WHT

POWER SUPPLY

CORD 120V 60Hz

NOTE:

The neutral (WHT) wire must be connected to the

terminal with "N" mark on the powersupply cord.

BLK

WHT

GRY

NOTE:

The grounding conductor of

the power supply cord has

been grounded by power

supply cord fixing screw.

The screw must always be

kept tight.

COM.

N.O.

DOOR

SENSING

SWITCH

PNK

GRN

to Oven cavity

GRN

PNK

GRN 2

CN-B

WHT 1

CN-A

BRN

GRY

RED

WHT

BLK

GRY

WHT

SOURCE

LOAD

SOURCE

WHT

BLK

AH SENSOR

RED

WHT

123

CN-F

NOTE: Connect the GRY wire leads to the

cabinet side terminal of the power

transformer to avoid an operation

error of AH sensor.

CN-B

RY2

RY1

PRIMARY

INTERLOCK

RELAY

CN-A

112

CONTROL PANEL

(LSI UNIT)

(POWER UNIT)

CN-F

CN-C

CN-G

Page 33

R530EWT

12 – 2

[2] Power Unit Circuit

Figure S-2. Power Unit Circuit

CN-A

R4 27

VRS1

(J1)

D7D8

1SS270A1SS270A

10G471K

C1 0.1μ/50v

C3 0.1μ/50v

ZD1

HZ16-1

C5 10μ/35v

C2 1000μ/35v

C4 10μ/35v

R1 2.4k

1SS270A1SS270A

D1-D4

1N4002L

R5 4.7k

R2 680 1/2w

R3 510 1/2w

R6 3.3k

Q2 2SB1238

SP1 PKM22EPT

Q1 2SB1238

RY1

RY2

Q3 KRC243M

CN-C 12PIN LEAD WIRE HARNESS

LED

GND

INT

BUZZER

MICRO

DOOR SENSING SWITCH

OVEN LAMP TURNTABLE MOTOR FAN MOTOR

MICRO

DOOR SENSING SWITCH

OVEN LAMP TURNTABLE MOTOR FAN MOTOR

C10

C11

C12

Page 34

R530EWT

12 – 3

[3] LSI Unit Circuit

Figure S-3. LSI Unit Circuit

C-10

C-9

C-1

C-8

C-12

F-1

F-2

F-3

G1 G2 G3 G4 G5 G6 G7 G8

G10

G11

G12

G13

G14

C-11

C-3

C-4

C-2

CN-C

GND

INT

LED

OVEN LAMP

TURNTABLE

MOTOR

FAN MOTOR

BUZZERR

MICRO

DOOR

SENSING

SWITCHNCAH SENSOR

NOTE

: IF NOT SPECIFIED 1/10W

±5%

CN-F

D20

CN-G

Q20

DTA143EAK

Q30

DTA143EAK

R90

330 1w

IC-2

BA4558

CF1

CST4.00MGW

IC-1

7237

144 109

108

R94

4.7k

R69 15k

R97

15k

R41 15k

R92 1.8kF R93 360kF

R91

3.32kD

R96

3.57kD

R40

4.7k

R74 270k

R95

15k

Q21

DTA123JKA

D90

Q11

DTA143EAK

LD10LD11LD12LD13

LD15LD14

C10 47 μ/16v

C11 0.1 μ/50v

C90 0.1 μ/50v

C91 0.1 μ/50v

C40 0.01 μ /25v

C60 330p/50v

C20

0.1 μ /50v

C13 0.01μ/25v

AIN0

AIN1

AIN2

AIN3

C14 0.01μ/25v

C15

0.1μ/50v

VL4

VL3

VL2

P44

P45

P20

P07 P06 P05 P04 P03 P02 P01 P00

P17

P16

P15

P14

AIN7

AIN6

AIN5AIN4

P21 P22 P23 P24

CNTRO

VL1

C16

0.1μ/50v

C17

0.1μ/50v

C18

0.1μ/50v

R12 15k

(J11) 4.7k (J10)

(J12)

(J14)

(J16)

(J13) 4.7k

(J15) 4.7k

(J17) 4.7k

R11 15k

R10 1k

R15

4.7k R16

4.7k

R170R18

4.7k

R98

620k

R99

300k

R100

150kF

R101

75kF

R102

37.4kF

R19

4.7k

C12

0.1 μ /50v

C92

0.01μ/25v

C93

0.01μ/25v

ZD10

UDZ4.3B

Q10

2SA1037AK

Fresh

vegetables

Beverage

Center

Breakfast Lunch

Popcorn

Snacks

From the

Pantry

Start

Touch On

Fish

Seafood

Power

Level

Keep

Warm

Plus

Minute

Recipes

Defrost

Center

Custom

Help

Baked

potatoes

Sensor

reheat

Minute

Plus

Vegetables

Rice

Poultry

Ground

meat

Entrees

Timer

Clock

Stop

Clear

C61 330p/50v

C62 330p/50v

C63 330p/50v

C64 330p/50v

C65 330p/50v

R75 270k

R60 15k

R61 15k

R62 15k

R63 15k

R64 15k

R65 15k

R66 15k

R67 15k

R76 270k

R77 270k

R78 270k

R79 270k

R70 15k

R71 15k

R72 15k

R73 15k

R68 15k

C-6

C-5

C-7

COM14

COM15

COM5

COM6

COM16

COM15

COM14

COM13

COM12

COM11

COM10

COM9

SEG40

SEG39

SEG38

SEG37

SEG36

SEG35

SEG34

SEG33

SEG32

SEG31

SEG30

SEG29

SEG28

SEG27

SEG26

SEG25

SEG24

SEG23

SEG22

SEG21

SEG20

SEG19

SEG18

SEG17

SEG16

SEG15

SEG14

SEG13

SEG12

SEG11

SEG10

SEG9

SEG8

SEG7

SEG6

SEG5

SEG4

SEG3

SEG2

SEG1

COM1

COM2

COM3

COM4

COM5

COM6

COM7

COM8

COM0

COM5

COM15

COM8

SEG34

SEG39

P05

P04

P03

P02

P01

P00

P17

P16

P15

P14

AIN7

AIN6

AIN5

AIN4

RESET

XCOUT

XCIN

VCC

OSCSEL

XOUT

VSS

XIN

AIN3

AIN2

AIN1

AIN0

COM8

COM9

COM10

COM11

COM12

COM13

COM7

SEG0

SEG1

SEG2

SEG3

SEG4

SEG5

SEG6

SEG7

SEG8

SEG9

SEG10

SEG11

SEG12

SEG13

SEG14

SEG15

SEG16

SEG17

SEG18

SEG19

SEG20

SEG21

SEG22

SEG23

SEG24

SEG25

SEG26

SEG27

SEG28

SEG29

SEG30

SEG31

SEG32

SEG33

COM4

COM3

COM2

COM1

COM0

VL1

VL2

VL3

VL4

VL5

C3C2C1

VLIN

VREG

VSS

P27

P26

P25

P24

P23

P22

P21

P20

P47

P46

P45

P44

P43

CNTR0

P41

INT0

P07

P06

SEG67

SEG66

SEG65

SEG64

SEG63

SEG62

SEG61

SEG60

SEG59

SEG58

SEG57

SEG56

SEG55

SEG54

SEG53

SEG52

SEG51

SEG50

SEG49

SEG48

SEG47

SEG46

SEG45

SEG44

SEG43

SEG42

SEG41

SEG40

SEG39

SEG38

SEG37

SEG36

SEG35

SEG34

SENSORDEFROSTTURNTABLEOFFCOOK

HELP

Page 35

R530EWT

12 – 4

[4] Printed Wiring Board of Power Unit

Figure S-4. Printed Wiring Board of Power Unit

WH-1

SH-B

SH-A

(J1)

(D10)

RY3

(CN-D)

ZD1

VRB

SP1

RY2

VRS1

OMIF

RY1

TTM

(CN-C)

CN-C

CN - B

CN - A

Page 36

R530EWT

12 – 5

Page 37

PartsGuide

R530EWT

PARTS LIST

MICROWAVE OVEN

HOW TO ORDER REPLACEMENT PARTS

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

1. MODEL NUMBER

2. REF. NO.

3. PART NO.

4. DESCRIPTION

Parts marked "*" may cause undue microwave exposure. Parts marked " " are used in voltage than 250V.

CONTENTS

[1] OVEN PARTS

[2] DOOR AND CONTROL PANEL

PARTS for R-530EK-T/530EW-T

MODELS

[3] DOOR AND CONTROL PANEL

PARTS for R-530ES-T

 INDEX

R-530EK-T R-

530EW-T

R-530ES-T

TOP PAD ASSEMBLY

FPADBA685WRKZ

INTO THE OVEN CAVITY

DOOR PROTECTION SHEET

SPADPA204WRE0

FOAM SHEET

SPAKHA013WREZ

6-6 OPERATION MANUAL

6-8 RECIPE CARD

6-3 TURNTABLE TRAY

6-2 TURNTABLE SUPPORT

TRAY PAD ASSEMBLY

CPADBA404WRKZ

Not replaceable items.

CABINET COVER for R-530EK-T & R530ES-T

SPAKHA026WREZ

PLASTIC BAG

SSAKHA012WRE0

BOTTOM PAD ASSEMBLY

FPADBA686WRKZ

PACKING CASE SPAKCE564WREZ [R-530EK-T] SPAKCE565WREZ [ SPAKCE567WREZ [R-530ES-T]

R-530EW-T

]

This document has been published to be used for after sales service only. The contents are subject to change without notice.

Page 38

R530EWT

[1] OVEN PARTS

7-4

7-7

7-4

7-5

4-13

4-8

4-9

6-9

1-14

6-2

6-3

7-6

2-1

7-8

7-5

1-7

7-9

2-3

forR-530EK-T/EW-T

7-11

4-10

1-9

1-10

4-6

4-14

7-11

1-4

7-2

forR-530ES-T

4-15

4-7

4-3

4-16

6-4

7-9

6-7

4-1

6-5

4-4

1-6

7-6

7-1

1-5

1-11

7-3

1-12

7-6

1-8

7-5

7-4

4-12

7-10

1-3

1-5

1-13

4-2

7-4

7-7

7-8

7-9

7-4

4-5

7-4

2-2

1-1

1-2

7-9

7-4

2-2

4-11

7-4

Page 39

R530EWT

NO. PARTS CODE

PRICE

RANK

NEW

MARK

PAR T

RANK

[1] OVEN PARTS

ELECTRIC PARTS

* 4-3 PHOK-A130WRFZ AK Latch hook

* 4-8 ------------- -- Oven cavity (Not a replaceable part)

1-1 RC-QZA336WRZZ AS High voltage capacitor 1-1 RC-QZA235WRE0 AU High voltage capacitor (Interchangeable) 1-1 RC-QZB018MRE0 -- High voltage capacitor for production use (Interchangeable) 1-2 FH-DZA131WRKZ AN High voltage rectifier assembly 1-3 RLMPTA087WRZZ AL Oven lamp 1-3 RLMPTA082WRZZ AL Oven lamp (Interchangeable) 1-3 RLMPTA085WRZZ AL Oven lamp (Interchangeable) 1-4 RMOTEA433WRZZ AX Fan motor 1-4 RMOTEA346WRE0 AV Fan motor (Interchangeable) 1-5 FFS-BA033WRKZ -- Monitor fuse (20A) and monitor switch (V-5220Q) 1-5 FFS-BA037WRKZ AN " " (20A) and monitor switch (D3V-1G-2C25) (Interchangeable) 1-6 QSW-MA085WRE0 AF Secondary interlock switch and door sensing switch 1-6 QSW-MA147WRZZ AG Secondary interlock switch and door sensing switch 1-7 QFS-TA014WRE0 AG Cavity temperature fuse 150C 1-7 RTHM-A145WRZZ AK Cavity thermal cut-out 145C

1-8 RV-MZA293WRE0 BH Magnetron

1-8 RV-MZA332WRZZ -- Magnetron for production use (Interchangeable)

1-9 RMOTDA264WRZZ AT Turntable motor 1-9 RMOTDA186WRE0 AW Turntable motor (Inerchangeable)

1-9 RMOTDA252WRZZ AN Turntable motor (Inerchangeable) 1-10 RTRN-A764WRZZ BH Power transformer 1-11 FACCDA103WREZ AQ Power supply cord 1-11 FACCDA085WREZ AQ Power supply cord (Interchangeable) 1-11 FACCDA083WRE0 AQ Power supply cord (Interchangeable) 1-12 QFS-TA013WRE0 AG Magnetron temperature fuse 150C 1-12 RTHM-A146WRZZ AL Magnetron thermal cut-out 145C (Interchangeable) 1-13 FPWBFA437WRKZ AS Noise filter unit 1-14 FDTCTA206WRKZ AT AH sensor

CABINET PARTS

2-1 GDAI-A439WRWZ AZ Base plate

2-2 GLEGPA104WREZ AF Leg

2-3 GCABUB116WRPZ BG Outer case cabinet (R-530EK-T)

2-3 GCABUB118WRPZ BG Outer case cabinet (R-530EW-T)

2-3 GCABUB120WRPZ BH Outer case cabinet (R-530ES-T)

OVEN PARTS

4-1 LBNDKA163WRPZ AK H.V. Capacitor band

4-2 LANGTA430WRPZ AL Chassis support

4-4 MLEVPA244WRFZ AG Switch lever

4-5 PDUC-B033WRFZ AM Magnetron duct

4-6 NFANJA060WRFZ AH Fan blade

4-7 PDUC-A610WRF0 AR Fan duct

4-9 PCOVPA465WREZ AG Waveguide cover 4-10 PPACGA084WRF0 AE Turntable motor packing 4-11 PCUSGA630WRPZ AD Cushion 4-12 PCUSGA731WRPZ AF Cushion 4-13 PDUC-B031WRPZ AH Sensor duct 4-14 PCUSGA729WRPZ AB Cushion 4-15 PCUSGA730WRPZ AG Cushion 4-16 PCUSUA278WRP0 AB Cushion

MISCELLANEOUS

6-2 FROLPA117WRKZ BA Turntable support

6-3 NTNT-A099WRE0 AX Turntable tray

6-4 TCAUAA292WRRZ AE Monitor caution label

6-5 TCAUAA296WRRZ AH DHHS/Screw caution label (R-530EK-T/530EW-T)

6-5 TCAUAA278WRRZ AG DHHS/Screw caution label (R-530ES-T)

6-7 TCAUAA308WRRZ AD AC cord caution

6-9 TLABMB191WRRZ AD Menu label

SCREWS, NUTS AND WASHERS

7-1 XHPS740P08000 AB Screw : 4mm x 8mm

7-2 LX-CZ0052WRE0 AA Special screw

7-3 XHTS740P12RV0 AC Screw : 4mm x 12mm

7-4 XOTS740P12000 AA Screw : 4mm x 12mm

7-5 XCBS730P06000 AA Screw : 3mm x 6mm

7-6 XHTS740P08RV0 AG Screw : 4mm x 8mm

7-7 LX-CZA070WRE0 AC Special screw (Torx tamper proof screw)

7-8 XOTS840P08000 AB Screw : 4mm x 12mm (for R-530EK-T)

7-8 XOTS740P12000 AA Screw : 4mm x 12mm (for R-530EW-T/ES-T)

7-9 XHPS740P08K00 AB Screw : 4mm x 8mm 7-10 XOTS740P10000 AB Screw : 4mm x 10mm 7-11 XETS740P10000 AA Screw : 4mm x 10mm

DESCRIPTION

Page 40

R530EWT

[2] DOOR AND CONTROL PANEL PARTS for R-530EK-T/530EW-T

for R-530EK-T/530EW-T

6-1

Actual wire harness may be different from illustration.

6-6

6-8

5-5

5-4

5-6

5-1

5-8

5-9

5-3

5-2

3-3

5-7

3-2-1

3-2

3-6

3-1

3-6

NO. PARTS CODE

PRICE

RANK

[2] DOOR AND CONTROL PANEL PARTS for R-530EK-T/530EW-T

CONTROL PANEL PARTS

3-1 DPWB-A558DRKZ BR Control unit 3-2 FPNLCB959WRKZ BA Panel sub assy (R-530EK-T)

3-2 FPNLCB960WRKZ BA Panel sub assy (R-530EW-T) 3-2-1 FUNTKB297MRE0 AT Key unit (R-530EK-T) 3-2-1 FUNTKB298MRE0 AT Key unit (R-530EW-T)

3-3 JBTN-B442WRFZ AH Open button (R-530EK-T)

3-3 JBTN-B443WRFZ AH Open button (R-530EW-T)

3-4 HDECQA370WRFZ AL Open button decoration (R-530EK-T)

3-4 HDECQA371WRFZ AL Open button decoration (R-530EW-T)

3-5 MSPRCA157WREZ AF Open button spring

3-6 XEPS730P08XS0 AB Screw; 3mm x 8mm

DOOR PARTS

* 5-1 GWAKPB129WRRZ AX Door frame (R-530EK-T) * 5-1 GWAKPB131WRRZ AX Door frame (R-530EW-T) * 5-2 LSTPPA139WRF0 AE Latch head

NEW

MARK

PAR T

RANK

3-5

3-4

DESCRIPTION

Page 41

R530EWT

NO. PARTS CODE

PRICE

RANK

NEW

MARK

PAR T

RANK

[2] DOOR AND CONTROL PANEL PARTS for R-530EK-T/530EW-T

* 5-4 FDORFB075MRT0 AZ Door panel

* 5-6 GCOVHA523WRFZ AV Choke cover

5-3 MSPRTA084WRE0 AB Latch spring

5-5 PSHEPB016MRE0 AK Sealer film

5-7 XEPS730P06XS0 AB Door screw 5-8 PGLSPA713WREZ AV Door glass (R-530EK-T) 5-8 PGLSPA714WREZ AT Door glass (R-530EW-T) 5-9 LSTPPA256WRFZ AG Door glass stopper

MISCELLANEOUS

6-1 FW-VZC149WREZ AX Main wire harnes 6-6 TINSEB148WRRZ AM Operation manual 6-8 TCADCA933WRRZ AM Recipe card

[3] DOOR AND CONTROL PANEL PARTS for R-530ES-T

for R-530ES-T

5-6

5-4

5-1

5-5

DESCRIPTION

3-1

3-6

5-2

3-2-1

5-3

3-2

6-1

Actual wire harness may be different from illustration.

3-3

3-5

6-6

NO. PARTS CODE

6-8

PRICE

RANK

NEW

MARK

PAR T

RANK

[3] DOOR AND CONTROL PANEL PARTS for R-530ES-T

CONTROL PANEL PARTS

3-1 DPWB-A559DRKZ BR Control unit

3-2 FPNLCB962WRKZ BB Panel sub assembly 3-2-1 FUNTKB281MRE0 AU Key unit 3-2-2 HDECAA347WRPZ AP Panel decoration

3-3 JBTN-B445WRFZ AK Open button

3-5 MSPRCA157WREZ AF Open button spring

3-6 XEPS730P08XS0 AB Screw; 3mm x 8mm

DOOR PARTS

* 5-1 FCOV-A017WRKZ BH Door frame assembly * 5-2 LSTPPA139WRF0 AE Latch head

5-3 MSPRTA084WRE0 AB Latch spring

3-6

3-2-2

DESCRIPTION

Page 42

R530EWT

NO. PARTS CODE

PRICE

RANK

NEW

MARK

PAR T

RANK

[3] DOOR AND CONTROL PANEL PARTS for R-530ES-T

* 5-4 FDORFB075MRT0 AZ Door panel

* 5-6 GCOVHA523WRFZ AV Choke cover

5-5 PSHEPB016MRE0 AK Sealer film

MISCELLANEOUS

6-1 FW-VZC149WREZ AX Main wire harnes 6-6 TINSEB148WRRZ AM Operation manual 6-8 TCADCA933WRRZ AM Recipe card

DESCRIPTION

Page 43

INDEX

PARTS CODE No.

[ D ] DPWB-A558DRKZ 2-3-1 BR DPWB-A559DRKZ 3-3-1 BR

[ F ] FACCDA083WRE0 1-1-11 AQ FACCDA085WREZ 1-1-11 AQ FACCDA103WREZ 1-1-11 AQ FCOV-A017WRKZ 3-5-1 BH FDORFB075MRT0 2-5-4 AZ

" 3-5-4 AZ FDTCTA206WRKZ 1-1-14 AT FFS-BA033WRKZ 1-1-5 -FFS-BA037WRKZ 1-1-5 AN FH-DZA131WRKZ 1-1-2 AN FPNLCB959WRKZ 2-3-2 BA FPNLCB960WRKZ 2-3-2 BA FPNLCB962WRKZ 3-3-2 BB FPWBFA437WRKZ 1-1-13 AS FROLPA117WRKZ 1-6-2 BA FUNTKB281MRE0 3-3-2-1 AU FUNTKB297MRE0 2-3-2-1 AT FUNTKB298MRE0 2-3-2-1 AT FW-VZC149WREZ 2-6-1 AX

" 3-6-1 AX

[ G ] GCABUB116WRPZ 1-2-3 BG GCABUB118WRPZ 1-2-3 BG GCABUB120WRPZ 1-2-3 BH GCOVHA523WRFZ 2-5-6 AV

" 3-5-6 AV GDAI-A439WRWZ 1-2-1 AZ GLEGPA104WREZ 1-2-2 AF GWAKPB129WRRZ 2-5-1 AX GWAKPB131WRRZ 2-5-1 AX

[ H ] HDECAA347WRPZ 3-3-2-2 AP HDECQA370WRFZ 2-3-4 AL HDECQA371WRFZ 2-3-4 AL

[ J ] JBTN-B442WRFZ 2-3-3 AH JBTN-B443WRFZ 2-3-3 AH JBTN-B445WRFZ 3-3-3 AK

[ L ] LANGTA430WRPZ 1-4-2 AL LBNDKA163WRPZ 1-4-1 AK LSTPPA139WRF0 2-5-2 AE

" 3-5-2 AE LSTPPA256WRFZ 2-5-9 AG LX-CZ0052WRE0 1-7-2 AA LX-CZA070WRE0 1-7-7 AC

[ M ] MLEVPA244WRFZ 1-4-4 AG MSPRCA157WREZ 2-3-5 AF

" 3-3-5 AF

MSPRTA084WRE0 2-5-3 AB

" 3-5-3 AB

[ N ] NFANJA060WRFZ 1-4-6 AH NTNT-A099WRE0 1-6-3 AX

[ P ] PCOVPA465WREZ 1-4-9 AG PCUSGA630WRPZ 1-4-11 AD PCUSGA729WRPZ 1-4-14 AB PCUSGA730WRPZ 1-4-15 AG PCUSGA731WRPZ 1-4-12 AF PCUSUA278WRP0 1-4-16 AB PDUC-A610WRF0 1-4-7 AR PDUC-B031WRPZ 1-4-13 AH PDUC-B033WRFZ 1-4-5 AM PGLSPA713WREZ 2-5-8 AV PGLSPA714WREZ 2-5-8 AT PHOK-A130WRFZ 1-4-3 AK PPACGA084WRF0 1-4-10 AE PSHEPB016MRE0 2-5-5 AK

" 3-5-5 AK

PRICE RANK

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MARK

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RANK

PARTS CODE No.

[ Q ] QFS-TA013WRE0 1-1-12 AG QFS-TA014WRE0 1-1-7 AG QSW-MA085WRE0 1-1-6 AF QSW-MA147WRZZ 1-1-6 AG

[ R ] RC-QZA235WRE0 1-1-1 AU RC-QZA336WRZZ 1-1-1 AS RC-QZB018MRE0 1-1-1 -RLMPTA082WRZZ 1-1-3 AL RLMPTA085WRZZ 1-1-3 AL RLMPTA087WRZZ 1-1-3 AL RMOTDA186WRE0 1-1-9 AW RMOTDA252WRZZ 1-1-9 AN RMOTDA264WRZZ 1-1-9 AT RMOTEA346WRE0 1-1-4 AV RMOTEA433WRZZ 1-1-4 AX RTHM-A145WRZZ 1-1-7 AK RTHM-A146WRZZ 1-1-12 AL RTRN-A764WRZZ 1-1-10 BH RV-MZA293WRE0 1-1-8 BH RV-MZA332WRZZ 1-1-8 --

[ T ] TCADCA933WRRZ 2-6-8 AM

" 3-6-8 AM TCAUAA278WRRZ 1-6-5 AG TCAUAA292WRRZ 1-6-4 AE TCAUAA296WRRZ 1-6-5 AH TCAUAA308WRRZ 1-6-7 AD TINSEB148WRRZ 2-6-6 AM

" 3-6-6 AM TLABMB191WRRZ 1-6-9 AD

[ X ] XCBS730P06000 1-7-5 AA XEPS730P06XS0 2-5-7 AB XEPS730P08XS0 2-3-6 AB

" 3-3-6 AB XETS740P10000 1-7-11 AA XHPS740P08000 1-7-1 AB XHPS740P08K00 1-7-9 AB XHTS740P08RV0 1-7-6 AG XHTS740P12RV0 1-7-3 AC XOTS740P10000 1-7-10 AB XOTS740P12000 1-7-4 AA

" 1-7-8 AA XOTS840P08000 1-7-8 AB

PRICE

RANK

R530EWT

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