Sharp R-9H58 Service Manual

Page 1

R-9H58

TABLE OF CONTENTS

Page

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

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

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

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

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

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

FUNCTION OF IMPORTANT COMPONENTS ................................................................................................. 7

SERVICING ..................................................................................................................................................... 10

TEST PROCEDURE ........................................................................................................................................ 12

TOUCH CONTROL PANEL ............................................................................................................................. 20

COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE............................................................ 26

MICROWAVE MEASUREMENT ..................................................................................................................... 31

WIRING DIAGRAM ......................................................................................................................................... 32

PICTORIAL DIAGRAM.................................................................................................................................... 34

CONTROL PANEL CIRCUIT ........................................................................................................................... 35

PRINTED WIRING BOARD ............................................................................................................................. 36

PARTS LIST..................................................................................................................................................... 37

S8606R9H58PJ/

CONVECTION

MICROWAVE OVEN

MODEL

R-9H58

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

SER VICE MANU AL

SHARP CORPORATION

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R-9H58

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R-9H58

SER VICE MANUAL

CONVECTION

MICROWAVE OVEN

R-9H58

GENERAL IMPORTANT INFORMATION

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

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

CAUTION

MICROWAVE RADIATION

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

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

WARNING

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

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

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

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

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

SHARP CORPORATION

OSAKA, JAPAN

PRODUCT SPECIFICATIONS

APPEARANCE VIEW

OPERATING SEQUENCE

FUNCTION OF IMPORTANT COMPONENTS

SERVICING AND TROUBLESHOOTING CHART

TEST PROCEDURE

TOUCH CONTROL PANEL ASSEMBLY

COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE

MICROWAVE MEASUREMENT

WIRING DIAGRAM

PARTS LIST

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R-9H58

PRODUCT SPECIFICATIONS

ITEM DESCRIPTION

Power Requirements 230 - 240 Volts

50 Hertz Single phase, 3 wire earthed

Power Consumption 1500 W (Microwave)

1600 W (Convection)

Power Output 850 watts (IEC-705-1988 )

Operating frequency of 2450MHz Convection heater 1500 W Case Dimensions Width 627mm

Height 378mm

Depth 483mm Cooking Cavity Dimensions Width 410mm

Height 245mm

Depth 410mm Control Complement Touch Control System

Clock ( 1:00 - 12:59)

Timer (0 - 99 min. 99 sec.)

Microwave Power for Variable Cooking

Repetition Rate;

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

MED HIGH...........................................................approx. 70% of Full Power

MED...................................................................... approx. 50% of Full Power

MED LOW (DEFROST) ........................................approx. 30% of Full Power

LOW ..................................................................... approx. 10% of Full Power

Convection Temperature for Variable Cooking

CONVECTION...................................................... 40 to 250˚C Temp. control

LOW MIX(BAKE) ..................................180˚C with 10% of microwave power

HIGH MIX(ROAST)...............................200˚C with 30% of microwave power

GRILL ................................................................................... 250˚C (Preheat)

HELP pad

SENSOR INSTANT ACTION pads

MULTI COOK pad

REHEAT SENSOR pad

CONVECTION COOKING FUNCTION pads

EASY DEFROST pad

NUMBER and TEMPERATURE pads

POWER LEVEL pad

MEMORY pad

MORE. LESS pads

STOP/CLEAR pad

CLOCK pad

INSTANT COOK/START pad Set Weight Approx. 29 kg

GENERAL INFORMATION

WARNING

THIS APPLIANCE MUST BE EARTHED

IMPORTANT

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

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

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R-9H58

APPEARANCE VIEW

1. Ventilation opening

2. Oven lamp

3. Door hinges

4. Door safety latches

5. See through door

6. Door seal and sealing surfaces

7. Door open button

8. Touch control panel

9. Digital readout

10.Wave guide cover

11.Coupling

12.Access cover for oven lamp replacement

13.Menu label

14.Rating label

15. low rack

16.High rack

TOUCH CONTROL PANEL

11



13



112



10



6



14



HELP

MULTI COOK

REHEAT

SENSOR

SENSOR INSTANT ACTION

POWER

LEVEL

EASY

DEFROST

STOP

CLEAR

CLOCK

LOW MIX HIGH MIX

GRILL

CONVEC

LESS MORE

MEMORY PREHEAT

Fresh

Vegetables

Frozen

Vegetables

Casseroles Desserts

Reheat

Pie

Jacket Potato

Info Display

1 2 3 4 5

6 7 8 9 O

NSTANT COOK



START

MULTI COOK PAD Press to select Multi Cook mode.     

MORE ( ), LESS ( ) PADS

 Press to increase/decrease the time in one minute increments during cooking or to alter the doneness for the Sensor Instant Action, Reheat Sensor, Multi Cook or Easy Defrost modes.  CONVECTION COOKING FUNCTION PADS Press to cook for each function. 

POWER LEVEL PAD Press to select microwave power setting. If not pressed, HIGH is automatically selected.  NUMBER AND TEMPERATURE PADS Press to enter cooking times, clock time, convection temperature or to select the Multi Cook menus.  

 STOP/CLEAR PAD

Press to clear during programming. Press once to stop operation of oven during cooking; press twice to cancel cooking program.

HELP PAD Press to select auto start, information guide on/off, child lock, demonstration modes or info on pad. Press to get cooking information.  REHEAT SENSOR PAD Press to select 3 popular Reheat menu.  SENSOR INSTANT ACTION PADS Press once to cook or reheat 6 popular menus.   MEMORY PAD Press to enter the frequently used cooking program. Press to recall the memorized program.     

EASY DEFROST PAD Press to defrostmeat by entering weight only.   INSTANT COOK/START PAD Press once to cook for 1 minute at HIGH or increase by 1 minute multiples each time this pad is pressed during Microwave, Convection, Grill or Mix cooking. 

CLOCK PAD Press to set Clock 

Indicator

MIX CONV DEFROST SENSOR

COOK KG HELP



40˚C 70˚C 130˚C 150˚C 160˚C

180˚C 200˚C 220˚C 230˚C 250˚C

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

Relay and Components Connection

RELAY CONNECTED COMPONENT RY1 Oven lamp/ Turntable motor RY2 Power transformer RY3 Convection heater RY4 Damper motor RY5 Convection motor RY6 Fan motor

OFF CONDITION

Closing the door activates all door interlock switches: upper latch switch, lower latch switch and stop switch. (In this condition, the monitor switch contacts are closed.) When oven is plugged in a wall outlet (230 - 240V, 50Hz), rated voltage is supplied to the control unit. (Figure O-1):

1. The display flashes “SHARP”, "MICRO-", "WAVE", 'OVEN". To set any programmes or set the clock, you must first touch the STOP/CLEAR pad. “ : “ appears in the display and the time counts up every minute.

NOTE: When the oven door is opened, the oven lamp

comes on at this time.

2. A signal is input to the control unit, energizing the coil of shut-off relay (RY4). RY4 contacts close, completing a circuit to the damper motor. The damper motor mow operates moving the damper to the open position, thereby closing the contacts of damper switch inputs a signal to the control unit. The coil of relay RY4 is de-energized, opening its contacts, thereby turning off the damper motor.

MICROWAVE COOKING CONDITION HIGH COOKING

Select microwave cooking and power level by pressing the POWER LEVEL pad and then enter cooking time by pressing the NUMBER pads. When the START pad is touched, the following operations occur:

1. The contacts of relays are closed and components connected to relays are turned on (RY1, RY2, RY6). (Figure O-2)

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

3.35 volts A.C. output on the filament winding and high voltage of approximately 2120 volts A.C. on the high voltage winding.

3. The filament winding voltage (3.35 volts) heats the magnetron filament and the high voltage (2120 volts) is sent to the voltage doubling circuit.

4 The 2450 MHz microwave energy produced in the

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

5. 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 switch, upper latch switch, lower latch switch and stop switch are activated with the following results. The circuits to the turntable motor, cooling fan motor and 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 is electrically monitoring the operation of the upper latch switch and lower latch switch and is mechanically associated with the door so that it will function in the following sequence.

1) When the door opens from a closed potion, the upper latch switch and the lower latch switch open their contacts, and then the monitor switch contacts close.

2) When the door is closed, from the open position, the monitor switch contacts first open, and then the contacts of the upper latch switch and lower latch switch must be closed.

If the common and normal open contacts of upper latch switch and the lower latch switch fail with their contacts closed when the door is opened, the closing of the monitor switch contacts will form a short circuit through the fuse, upper latch switch and the lower latch switch, causing the monitor fuse to blow.

MEDIUM HIGH, MEDIUM, MEDIUM LOW, LOW COOKING

When variable cooking power is programmed, the rated voltage is supplied to the power transformer intermittently through the contacts of the relay (RY2) which is operated by the control unit within a 32-second time base. Microwave power operation is follows:

VARI MODE ON TIME OFF TIME HIGH (100% power) 32 sec. 0 sec. MED HIGH (approx. 70% power) 24 sec. 8 sec. MED (approx. 50% power) 18 sec. 14sec. MED LOW (approx. 30% power) 12 sec. 20 sec. LOW (approx. 10% power) 6 sec. 26 sec.

NOTE: The ON/OFF time ratio does not exactly correspond

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

CONVECTION COOKING CONDITION

PREHEATING CONDITION

Press the PREHEAT pad and then select preheating temperature by pressing the temperature pad. When the START pad is touched, the following operations occur:

1. The coil of shut-off relays RY1+RY5+RY6 are energized, the oven lamp, cooling fan motor, turntable motor and convection motor are turned on.

2. The coil of relay (RY4) is energized by the CPU unit. The damper is moved to the closed position, opening the damper switch contacts. The opening of the damper switch contacts sends a signal to the LSI on the CPU

OPERATION SEQUENCE

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R-9H58

unit de-energizing the relay (RY4) and opening the circuit to the damper motor.

3. The coil of heater relay (RY3) is energized by the CPU unit and the main supply voltage is added to the convection heater.

4. When the oven temperature reaches the selected preheat temperature, the following operations occur:

4-1. The heater relay (RY3) is de-energized by the CPU

unit temperature circuit and thermistor, opening the circuit to the convection heater.

4-2. The oven will continue to function for 30 minutes,

turning the convection heater on and off, as needed to maintain the selected preheat temperature. The oven will shut-down completely after 30 minutes.

CONVECTION COOKING CONDITION

When the preheat temperature is reached, a beep signal will sound indicating that the holding temperature has been reached in the oven cavity. Open the door and place the food to be cooked in the oven. Press the CONVECTION pad and then enter the cooking temperature by pressing the temperature pad. And then enter the cooking time by pressing the NUMBER pads. When the START pad is touched, the following operations occur:

1. The numbers of the digital read-out start the count down to zero.

2. The oven lamp, turntable motor, cooling fan motor and convection motor are energized.

3. Heater relay (RY3) is energized (if the cavity temperature is lower than the selected temperature) and the main supply voltage is applied to the convection heater to return to the selected cooking temperature.

4. Upon completion of the cooking time, the audible signal will sound, and oven lamp, turntable motor, cooling fan motor and convection motor are deenergized. At the end of the convection cycle, if the cavity air temperature is above 116˚C, the circuit to (RY6) will be maintained (by the thermistor circuit) to continue operation of the cooling fan motor until the temperature drops below 116˚C, at which time the relay will be de-energized, turning off the fan motor. Relay (RY5) will however, open as soon as the convection cycle has ended, turning off the convection fan motor. This will now cool and allow the damper door to open.

5. At the end of the convection cook cycle, shut-off relay (RY4) is energized turning on the damper motor. The damper is returned to the open position, closing the damper switch contacts which send a signal to the control unit, de-energizing shut-off relay (RY4).

AUTOMATIC MIX COOKING CONDITION

Choose the LOW MIX or HIGH MIX by pressing the LOW MIX pad or HIGH MIX pad. And then enter cooking time by pressing the NUMBER pads. When the START pad is touched, the following operations occur:

1. The numbers of the digital read-out start the count down to zero.

2. The shut-off relay (RY1+RY5+RY6) energized, turning on the oven lamp, turntable motor, cooling fan motor and convection motor.

3. The shut-off relay (RY4) is energized. The damper door is closed from the open position.

4. The heater relay (RY3) is energized, adding the mains supply voltage to the convection heater.

5. Now, the oven is in the convection cooking condition.

6. When the oven temperature reaches the selected temperature, the following operations occur:

6-1. The power supply voltage is added to the convection

heater and power transformer alternately.

6-2. The convection heater operates through the heater

relay (RY3) contacts and the power transformer operates through the cook relay (RY2) contacts.

6-3. These are operated by the CPU unit to supply

alternately within a 48 second time base, convection

heat and microwave energy. The relationship between the convection and microwave power operations are as follows. Note: The ON and OFF time ratio does not correspond

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

16 SEC. 32 SEC.

48 SEC.

LOW MIX

BAKE

HIGH MIX

ROAST

MICROWAVE POWER

= APPROX. 30%

CONVECTION 

TEMPERATURE

300˚F

MICROWAVE POWER

= APPROX. 10%

CONVECTION 

TEMPERATURE

= 350˚F (180˚C)

40 SEC.8 SEC.

OFF

(MICRO.)

(CONVEC.)

(MICRO.)

(CONVEC.)

Note: During alternate Microwave/Convection operation,

the convection heater is energized only if the cavity temperature drops below the set temperature.

ABSOLUTE HUMIDITY SENSOR (AH SENSOR) COOKING CONDITION

In case where the AH sensor is used (REHEAT SENSOR or SENSOR INSTANT ACTION), the foods are cooked in microwave cooking mode 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 vapour is developed. The sensor “senses” the vapour 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:

1. Potatoes at room temperature. Vapour is emitted very

slowly.

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MICROWAVE

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

MICROWAVE

AH SENSOR

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

AH SENSOR COOKING SEQUENCE

1. In case the AH sensor cooking condition is started, the coil of shut-off relays (RY1+RY6) are energized, the oven lamp and cooling fan motor are turned on, but the power transformer is not turned on.

NOTE: The oven should not be operated on AH SENSOR

COOKING immediately after plugging in the unit. Wait five minutes before cooking on AH SENSOR COOKING CONDITION.

2. After about 16 seconds, the cook relay (RY2) 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 vapour from the oven cavity and sensor. (Figure O-2)

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

touch STOP/CLEAR pad.

3. The oven will go to the Mix Cooking Condition at the 2nd. or 3rd. stage when Reheat pie, Casseroles or Desserts has been chosen. (Figure O-4)

4. When the sensor detects the vapour 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 food, turn it or season, etc.

NOTE: In case where a small quantity of food is cooked,

the oven will stop without displaying the remaining cooking time.

5. When the timer reaches zero, an audible signal sounds. The shut-off relay (RY1+RY6) and cook relay (RY2) 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.

MULTI COOK

MULTI COOK will automatically compute the oven temperature, microwave power and cooking time for baking and roasting. Set the desired program by touching the MULTI COOK pad, and number pad. Enter the weight by touching the Number pads. When the START pad is touched, the following operations occur:

1. The COOK indicator will light and the Microwave Symbol and/or the Convection Fan Symbol will rotate.

2. The cooking time will appear on the display and start counting down to zero. The cooking time is adjusted automatically according to the weight of the food.

3. The shut-off relays (RY1, RY3, RY5 and RY6) are energized, turning on the oven lamp, turntable motor, cooling fan motor and convection motor. The power supply voltage is added to the convection heater.

4. Now, the oven is in the convection cooking mode.

5. When the oven temperature has reached the programmed convection temperature, the oven goes into the programmed cooking mode.

6. At the end of the MULTI COOK cycle, the damper is returned to the open position and the oven will go to the off condition. The cooling fan will remain on until the oven has cooled.

EASY DEFROST COOKING

The EASY DEFROST key is a special function key to defrost meats and poultry faster and better. EASY DEFROST key has 4 defrost stages. EASY DEFROST automatically defrosts roast beef, etc. When EASY DEFROST is selected and the food weight is entered by using the number pads, the oven will cook according to the special cooking sequence. (Figure O-2)

FIRE SENSING FEATURE (MICROWAVE MODE)

This model incorporates a sensing feature which will stop the oven's operation if there is a fire in the oven cavity during microwave cooking. This accomplished by the LSI repeatedly measures the voltage across the temperature measurement circuit (thermistor) during it's 32-seconds time base comparing the obtained voltage measurements. If the most recent voltage measured is 300mV grater than the previous voltage measured, the LSI judges it as a fire in the oven cavity and switches off the relays to the power transformer, fan motor and convection motor. The LSI also stops counting down and closes the damper door so that no fresh air will enter the oven cavity. Please refer to the following section for a more detailed description.

Operation

Please refer to the timing diagrams below.

1. The thermistor operates within a 32-seconds time base and it is energized for three (3) seconds and off for 29 seconds. Two (2) seconds after the thermistor is energized, the voltage across the temperature measurement circuit is sampled by the LSI and twenty one (21) seconds after the thermistor is cut off the LSI turns on the cooling fan for six (6) seconds.

2. The above procedure is repeated. If the difference between the first voltage measured (in step 1) and the voltage measured when the procedure is repeated (step 2) is greater than 300mV the LSI makes the judgment that there is a fire in the oven cavity and will switch off the relays to the power transformer, fan motor and convection motor. The LSI also stops counting down and closes the damper door so that no fresh air will enter the oven cavity.

3. Once the fire sensor feature has shut the unit down, the programmed cooking cycle may be resumed by pressing the "START" pad or the unit may be reset by pressing the "CLEAR" pad.

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R-9H58

UPPER AND LOWER LATCH SWITCHES

Those latch switches are mounted in the latch hooks as shown in figure. They are activated by the latch heads on the door. When the door is opened, the switches interrupt the circuit to all components except CPU unit and relay unit and oven lamp. A cook cycle cannot take place until the door is firmly closed thereby activating both interlock switches.

LATCH HOOK

STOP SWITCH

MONITOR SWITCH

SWITCH LEVER

OPEN LEVER

LATCH HEADS

DOOR OPEN  BUTTON

UPPER LATCH SWITCH

LOWER LATCH SWITCH

Figure D-1. Switches

MONITOR SWITCH

The monitor switch is mounted on the latch hook. It is activated (the contacts opened) by the lower latch head when the door is closed. The switch is intended to render the oven inoperative by means of blowning the fuse when the contacts of the common and normal open contacts of upper latch switch and lower latch switch fail to open when the door is opened.

Functions:

1. When the door is opened, the monitor switch contacts close (to the ON condition) due to their being normally closed. At this time the common and normal open contacts of upper latch switch and lower latch switch are in the OFF condition (contacts open) due to their being normally open contacts switch.

2. As the door goes to a closed position, the monitor switch contacts are first opened and then the common and normal open contacts of upper latch switch close. (On opening the door, each of these switches operate inversely.)

3 If the door is opened during cooking, and the common

and normal open contacts of upper latch switch and

IMPORTANT: During sensor cooking operation, the fire sensing operation sequence will not begin until the AH sensor has detected vapours and initiated a sensor cooking cycle. This is because the operation of the convection fan would interfere with the AH sensor's vapour detection.

CONVECTION

MOTOR

THERMISTOR

Sensing 

Voltage

OFF

0 2 24 30 64 (sec.)

3 sec.

Sensing the voltage across the temperature measurement circuit.

6 sec.

32 (sec.)

FUNCTION OF IMPORTANT COMPONENTS

lower latch switch fail to open, the fuse blows simultaneously with closing of the monitor switch contacts.

CAUTION: BEFORE REPLACING A BLOWN FUSE

TEST THE UPPER LATCH SWITCH, LOWER LATCH SWITCH AND MONITOR SWITCH FOR PROPER OPERATION. (REFER TO CHAPTER “TEST PROCEDURE”).

STOP SWITCH

The stop switch is activated by the latch head. When the door is opened while the oven is in cook cycle, the stop switch contacts open to de-energize the relay (RY-1,RY-2,RY-3,RY-5,RY-6). Then the cook cycle is stopped.

THERMAL CUT-OUT 150˚C (OVEN)

The oven thermal cut-out located on the left side of the thermal protection plate is designed to prevent damage to the convection heater unit if an overheated condition develops in the tube due to cooling fan failure, obstructed air ducts, dirty or blocked air intake, etc. Under normal operation, the oven thermal cut-out remains closed. However, when abnormally high temperatures are reached within the heater unit, the oven thermal cut-out will open, causing the oven to shut down. When the oven has cooled temperature, the oven thermal cut-out closes.

THERMAL CUT-OUT 95˚C (FAN MOTOR)

The thermal cut-out protect the fan motor against overheating. If its temperature goes up higher than 95˚C because the fan motor is locked or the ventilation operating are blocked, the contacts of the thermal cut-out will open and switch off the oven. When the thermal cut-out cools itself down to 75˚C, the contacts of the thermal cutout will close again.

TEMPERATURE FUSE 150˚C (MG)

This fuse protects the magnetron against overheating. If the temperature goes up higher than 150˚C because the fan motor is interrupted, the air inlet duct is blocked or the ventilation openings are obstructed, the fuse blows and cuts off the power supplying to the power transformer. The defective fuse must be replaced with new rated one.

FUSE M8A 250V

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

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R-9H58

2. The fuse also blows when upper latch switch and lower latch switch remain closed with the oven door open and when the monitor switch closes.

3. The fuse M8A also blows when asymmetric rectifier, H.V. rectifier, H.V. wire harness, H.V. capacitor, magnetron or secondary winding of power transformer is shorted.

ASYMMETRIC RECTIFIER

The asymmetric rectifier is a solid state device that prevents current flow ins both directions. And it prevents the temperature rise of the power transformer by blowing the fuse M8A when the high voltage rectifier is shorted.

rounding the magnetron and cools the magnetron. This air is channelled through the oven cavity to remove steam and vapours given off from the heating foods. It is then exhausted through the exhausting air vents at the oven cavity.

CONVECTION HEATER

The convection heater is located at the rear of the oven cavity. It is intended to heat air driven by the convection fan. The heated air is kept in the oven and force-circulated and reheated by the convection heater.

CONVECTION COOKING SYSTEM

This oven is designed with a hot air heating system where food is not directly heated by the convection heater, but is heated by forced circulation of the hot air produced by the convection heater. The air heated by the convection heater is circulated through the convection passage provided on the outer casing of the oven cavity by means of the convection fan which is driven by the convection motor. It then enters the inside of the oven through the vent holes provided on the left side of the oven. Next, the hot air heats the food on the turntable and leaves the oven cavity through the vent in the oven cavity left side wall. Without leaving the oven, this hot air is reheated by the convection heater, passes through the convection passage and enters the inside of the oven cavity again, in a continuing cycle. In this way, the hot air circulates inside the oven cavity to raise its temperature and, at the same time, comes into contact with the food being cooked. When the temperature inside the oven cavity reaches the selected temperature, the convection heater is de-energized. When the temperature inside the oven cavity drops below the selected temperature, the convection heater is energized again. In this way, the inside of the oven cavity is maintained at approximately the selected temperature. When the convection time reaches 0, the convection heater is de-energized and the convection fan stops operating and the oven shuts off. Upon completion of the cooking time, the audible signal will sound, and oven lamp, turntable motor, cooling fan motor and convection motor are de-energized. At the end of the convection cycle, if the cavity air temperature is above 116˚C, the circuit to RY6 will be maintained (by the thermistor circuit) to continue operation of the cooling fan motor until the temperature drops below 116˚C, at which time the relay will be deenergized, turning off the fan motor. Relay RY5 will however, open as soon as the convection cycle has ended, turning off the convection fan motor. This will now cool and allow the damper door to open.

DAMPER OPEN-CLOSE MECHANISM

Usually, the damper is in the open position except during convection cooking. Damper position is set automatically by damper motor, damper switch, motor cam and damper shaft. These components are operated by a signal that judges if microwave cooking or convection cooking operation is selected by the CPU unit.

Microwave Cooking:

Damper is in the open position, because a portion of cooling air is channelled through the cavity to remove steam and vapours given off from the heating foods.

The rated peak reverse voltage of D1 of the asymmetric rectifier is 6 KV The rated peak reverse voltage of D2 of the asymmetric rectifier is 1.7 KV. D1 and D2 of the asymmetric rectifier or high voltage rectifier are shorted when the each peak reverse voltage goes beyond the each rated peak reverse voltage. (The process of blowing the fuse M8A.) .

1. The high voltage rectifier is shorted by any causes when microwave cooking.

2. The peak reverse voltage of D2 of the rectifier goes beyond the rated peak reverse voltage 1.7 KV in the voltagedoubler circuit.

3. D2 of the rectifier is shorted.

4. The large electric currents flow through the high voltage winding of the power transformer.

5. The large electric currents beyond 8A flow through the primary winding of the power transformer.

6. The fuse M8A blows by the large electric currents.

7. The power supply to the power transformer is cut off.

THERMISTOR

The thermistor is a negative temperature coefficient type. The temperature in the oven cavity is detected through the resistance of the thermistor, and then the control unit causes the heating element relay to operate, thus the current to the heating element is turned ON/ OFF.

MONITOR RESISTOR

The monitor resistor prevents the fuse M8A 250V bursting when the fuse M8A 250V blows due to the operation of the monitor switch.

TURNTABLE MOTOR

The turntable motor drives the turntable supporting plate to rotate the turntable.

CONVECTION MOTOR

The convection motor drives the convection fan and provides the heated air.

FAN MOTOR

The fan motor drives a blade which draws external cool air. This cool air is directed through the air vanes sur-

D2 D1

ASYMMETRIC RECTIFIER

HIGH VOLTAGE RECTIFIER

Page 11

R-9H58

It is then exhausted at the top of the oven cavity into a condensation compartment.

Convection Cooking:

Damper is in the closed position, so that no hot air will be allowed to leak out the oven cavity.

Damper Operation

1. When power supply cord is plugged in: 1-1. When power supply cord is plugged in, a signal is

sensed in the control unit, and operates shut-off relay (RY4).

1-2. Contacts of shut-off relay (RY4) close, the damper

motor is energized, opening the damper door.

1-3. When the damper is moved to the open position by

the damper cam, damper switch is closed (ON position).

1-4. The signal of damper switch is re-sensed in the

control unit and shut-off relay (RY4) is turned off.

1-5. The rated voltage to the damper motor is stopped and

the motor turns off.

2. When oven is microwave cooking: Damper is in the open position

3. When oven is convection cooking:

3-1 Damper motor is energized by touching the convection,

temperature and START pads.

3-2. When damper is in the closed position (damper

switch is OFF), its signal is sensed by the control unit, and shut-off relay (RY4) is de-energized.

3-3. The damper is held in the closed position during the

convection cooking operation.

3-4. At the end of the convection cooking, shut-off relay

(RY4) is energized, and the damper is returned to the open position.

NOTE: If the damper door is not in the proper position,

closed during convection or open during microwave, the control unit will stop oven operation after 1 minute.

Cooking Mode Operation of Damper Microwave cooking OPEN Convection cooking CLOSE Sensor cooking OPEN Automatic mix cooking CLOSE Grill cooking CLOSE Slow cooking CLOSE

DAMPER DUCT

DAMPER

DAMPER CAM

DAMPER MOTOR

DAMPER SWITCH

DAMPER SHAFT

Figure D-2. Damper Mechanism

NOISE FILTER

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

Page 12

R-9H58

SERVICING

WARNING TO SERVICE PERSONNEL

Microwave ovens contain circuitry capable of producing very high voltage and current, contact with any part of the high voltage circuit will result in electrocution. High voltage capacitor, Power transformer, Magnetron, High voltage rectifier assembly, High voltage harness.

REMEMBER TO CHECK 4R

1) Reconnect all leads removed from components during testing.

2) Replace the outer case (cabinet).

3) Reconnect the supply.

4) Run the oven. Check all functions.

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

IMPORTANT: If the oven becomes inoperative because

of a blown fuse M8A in the upper latch switch - lower latch switch - monitor switch

- monitor resistor circuit, check the upper latch switch, lower latch switch, monitor switch and monitor resistor before replacing the fuse M8A.

REMEMBER TO CHECK 3D

1) Disconnect the supply.

2) Door opened, and wedged open.

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

HIGH-VOLTAGE CAPACITOR

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

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

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

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

TROUBLESHOOTING GUIDE

Page 13

R-9H58

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

Fuse M8A blows when power cord is plugged into wall outlet.

Display does not show anything when power cord is first plugged into wall outlet.

Display does not operate properly when STOP/ CLEAR pad is touched. (The time of day should appear on the display with beep sound during normal condition.)

Oven lamp does not light with door opened.

Oven lamp does not light at all Oven lamp light, but turnta-

ble motor does not operate. Cooling fan motor does not

operate. The oven stops after1 minute Oven does not go into a cook

cycle, when START pad is touched.

Low or no power is produced during microwave cooking (The food is heated incompletely or not heated at all)

Extremely uneven heating is produced in oven load (food).

Function of variable cooking does not operate properly except HIGH power.

CONV indicator lights, but heating element does not heat.

Temperature in the oven cavity is lower or higher than preset.

Convection cycle runs 1 minute then the oven shuts down.

Convection cycle runs 3 minutes then the oven shuts down.

Oven is in the sensor cooking condition but AH sensor does not end 1st. stage or does not stop cooking cycle or the oven stops soon.

MAGNETRON

POWER TRANSFORMER

H.V. RECTIFIER ASSEMBLY

HIGH VOLTAGE CAPACITOR

LATCH AND STOP SWITCHES

MONITOR SWITCH

DAMPER SWITCH

MAIN FUSE

TEMPERATURE FUSE 150˚C

THERMAL CUT-OUT

CONVECTION HEATER

THERMISTOR

FAN MOTOR

TURNTABLE MOTOR

CONVECTION MOTOR

DAMPER MOTOR

MONITOR RESISTOR

TOUCH CONTROL PANEL

KEY UNIT

RELAY (RY-1)

RELAY (RY-2)

RELAY (RY-3)

RELAY (RY-4)

RELAY (RY-5)

RELAY (RY-6)

FOIL PATERN ON P.W.B.

AH. SENSOR

OVEN LAMP OR SOCKET

PENED OR SHORTED WIRE HARNESS

WALL OUTLET

LOW POWER SUPPLY VOLTAGE

SHORTED POWER CORD

NOISE FILTER

CK = Check / RE = Replace

OFF CONDITION

ABCDEEEFGGHI JJ JJKMNOOOOOOPQRE CKCK CK RE L

COOKING CONDITION

(MICROWAVE)

PROBLEM

CONDITION

TEST PROCEDURE

POSSIBLE CAUSE

AND

DEFECTIVE PARTS

(AH. SENSOR)

(CONVECTION)

Page 14

R-9H58

TEST PROCEDURES

PROCEDURE

LETTER

COMPONENT TEST

A MAGNETRON TEST

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

CARRY OUT 3D CHECK. Isolate the magnetron from high voltage circuit by removing all leads connected to filament terminal. To test for an open circuit filament use an ohmmeter to make a continuity test between the magnetron

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

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

MICROWAVE OUTPUT POWER (1 Litre water load)

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

The formula is as follows;

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

Our condition for water load is as follows:

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

Water load.........1000 g Initial temperature...........10±2°C Heating time.........49 sec.

P = 85 x ∆T

Measuring condition:

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

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

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

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

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

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

7. The water load must be (1000±5) g.

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

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

Measuring method:

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

2. Add the 1 litre water to the vessel.

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

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

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

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

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

Page 15

R-9H58

TEST PROCEDURES

PROCEDURE

LETTER

COMPONENT TEST

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

Temperature after (49 + 2) = 51 sec................................................................. T2 = 21°C

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

Measured output power

The equation is “P = 85 x ∆T”..................................................P = 85 x 10°C = 850 Watts

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

CAUTION: 1°C CORRESPONDS TO 85 WATTS REPEAT MEASUREMENT IF THE POWER IS

INSUFFICIENT.

1000g

T1˚C

T2˚C

Heat up for51 sec.

B POWER TRANSFORMER TEST

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

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

CARRY OUT 3D CHECKS. Disconnect the leads to the primary winding of the power transformer. Disconnect the filament and

secondary winding connections from the rest of the HV circuitry. Using an ohmmeter, set on a low range, it is possible to check the continuity of all three windings. The following readings should be obtained:

a. Primary winding ................... approx. 1.3 Ω

b. Secondary winding............... approx. 72 Ω

c. Filament winding .................. less than 1Ω

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

CARRY OUT 4R CHECKS.

HIGH VOLTAGE RECTIFIER TEST CARRY OUT 3D CHECKS. Isolate the high voltage rectifier assembly from the HV circuit. The high voltage rectifier can be tested using an ohmmeter set to its highest range. Connect the ohmmeter across the terminal B+C of the high voltage rectifier and note the reading obtained. Reverse the meter leads and note this second reading. The normal resistance is infinite in one direction and more than 100 kΩ in the other direction.

CARRY OUT 4R CHECKS. ASYMMETRIC RECTIFIER TEST

CARRY OUT

3D CHECKS.

Isolate the high voltage rectifier assembly from the HV circuit. The asymmetric can be tested using an ohmmeter set to its highest range across the terminals A+B of the asymmetric rectifier and note the reading obtained. Reverse the meter leads and note this second reading. If an open circuit is indicated in both direction then the asymmetric rectifier is good. If an asymmetric rectifier is shorted in either direction, then the asymmetric rectifier is probably faulty and must be replaced with high voltage rectifier. When the asymmetric rectifier is defective, check whether magnetron, high voltage

D2 D1

ASYMMETRIC RECTIFIER

HIGH VOLTAGE RECTIFIER

C HIGH VOLTAGE RECTIFIER ASSEMBLY TEST

Page 16

R-9H58

TEST PROCEDURES

PROCEDURE

LETTER

COMPONENT TEST

rectifier, high voltage wire or filament winding of the power transformer is shorted.

CARRY OUT 4R CHECKS. NOTE: FOR MEASUREMENT OF THE RESISTANCE OF THE RECTIFIER, THE BATTERIES OF THE

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

CARRY OUT

3D CHECKS.

A. Isolate the high voltage capacitor from the circuit. B. Continuity check must be carried out with measuring instrument which is set to the highest resistance

range.

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

it has been charged.

D. A short-circuited capacitor shows continuity all the time. E. An open capacitor constantly shows a resistance about 10 MΩ because of its internal 10MΩ resistance. F. When the internal wire is opened in the high voltage capacitor shows an infinite resistance. G. The resistance across all the terminals and the chassis must be infinite when the capacitor is normal. If incorrect reading are obtained, the high voltage capacitor must be replaced.

CARRY OUT

4R CHECKS.

CARRY OUT 3D CHECKS.

1. If the fuse M8A is blown, there could be shorts or grounds in electrical parts or wire harness. Check them and replace the defective parts or repair the wire harness.

2. If the fuse M8A is blown when the door is opened, check the upper latch switch, lower latch switch, monitor switch and monitor resistor.

If the fuse M8A is blown by incorrect door switching, replace the defective switch(s) and the fuse M8A.

3. If the fuse M8A is blown, there could be short in the asymmetric rectifier or there is a ground in wire harness. A short in the asymmetric rectifier may have occured due to short or ground in H.V. rectifier, magnetron, power transformer or H.V. wire. Check them and replace the defective parts or repair the wire harness.

CARRY OUT 4R CHECKS. CAUTION: Only replace fuse with the correct value replacement.

D HIGH VOLTAGE CAPACITOR TEST

E SWITCH TEST

CARRY OUT

3D CHECKS.

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

Table: Terminal Connection of Switch

Plunger Operation COM to NO COM to NC COM; Common terminal

Released Open Circuit Short Circuit NO; Normally open terminal Depressed

Short Circuit Open Circuit NC; Normally close terminal

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

4R CHECKS.

F BLOWN FUSE F M8A

G TEMPERATURE FUSE AND THERMAL CUT-OUT TEST

CARRY OUT 3D CHECKS. Disconnect the leads from the terminals of the temp. fuse or thermal cut-out. Then using an

ohmmeter, make a continuity test across the two terminals as described in the table below. CARRY OUT 4R CHECKS.

Page 17

R-9H58

TEST PROCEDURES

PROCEDURE

LETTER

COMPONENT TEST

CARRY OUT 3D CHECKS. Disconnect connector-E from the CPU unit. Measure the resistance of the thermistor with an

ohmmeter. Connect the ohmmeter leads to Pin No’s E-3 and E-4 of the thermistor harness.

Room Temp. .................. 20˚C - 30˚C

Resistance ..................... Approx. 350kΩ - 155kΩ

If the meter does not indicate above resistance, replace the thermistor. CARRY OUT 4R CHECKS.

I THERMISTOR TEST

Table: Temperature Fuse and Thermal cut-out Test

Temperature of “ON” condition Temperature of “OFF” condition Indication ofohmmeter

Parts Name (closed circuit) (˚C) (open circuit) (˚C) (When room temperature

is approx. 20˚C) Temp. fuse 150˚C This is not resetable type. Above 150 ˚C Closed circuit Thermal cut-out 150˚C Below 130˚C Above 150˚C Closed circuit. Thermal cut-out 95˚C Below 75˚C Above 95˚C Closed circuit.

If incorrect readings are obtained, replace the temp. fuse or thermal cut-out.; An open circuit temperature fuse 150˚C (MG) indicates that the magnetron has overheated, this may

be due to resistricted ventilation, cooling fan failure or a fault condition within the magnetron or HV circuit.

An open circuit thermal cut-out 150˚C (OVEN) indicates that the convection motor has over heated, this may be due to convection motor locked.

An open circuit thermal cut-out 95˚C (FM) indicates that the fan motor winding has overheated, this may be due to blocked ventilation or locked cooling fan.

CARRY OUT 3D CHECKS. Before carring out the following tests make sure the heater is fully cool.

1. Resistance of heater Disconnect the wire leads to the heater to be tested. Using ohmmeter with low resistance range. Check the resistance across the terminals of the heater. The resistance of heater is approximately 37.5 ohms.

2. Insulation resistance Disconnect the wire leads to the heater to be tested. Check the insulation resistance between the element and cavity using a 500V - 100Mohms insulation tester. The insulation resistance should be more than 10Mohms in the cold start.

If the results of above test 1 and/or 2 are out of above specifications, the heater is probably faulty and should be replaced.

CARRY OUT 4R CHECKS.

H CONVECTION HEATER TEST

J MOTOR WINDING TEST

CARRY OUT 3D CHECKS. Disconnect the leads from the motor. Using an ohmmeter, check the resistance between the two terminals as described in the table below.

Table: Resistance of Motor

Motors Resistance Fan motor Approximately 295 Ω Turntable motor Approximately 10.5 kΩ Convection fan motor Approximately 210 Ω Damper motor Approximately 11 kΩ

Page 18

R-9H58

TEST PROCEDURES

PROCEDURE

LETTER

COMPONENT TEST

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

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

between the terminals of the monitor resistor.

The resistance of monitor resistor is approx. 0.8 ohms. If incorrect readings are obtained, replace the monitor resistor. CARRY OUT 4R CHECKS.

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 troubleshooting by unit replacement is described according to the symptoms indicated.

1. Key Unit. Note: Check key unit ribbon connection before replacement.

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

2. Control Unit.

The following symptoms indicate a defective control unit. Replacethe control unit.

2-1 In connection with pads.

a) When touching the pads, a certain group of pads do not produce a signal. b) When touching the pads, no pads produce a signal.

2-2 In connection with indicators.

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

K MONITOR RESISTOR TEST

L NOISE FILTER TEST.

CARRY OUT 3D CHECKS. Disconnect the leads from the terminals of 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 unit.

FUSE  M8A

RESISTOR 680K / 0.5W

LINE CROSS CAPACITOR 0.22µ / AC 250V

noise suppression coil

RESISTOR 10M / 0.5W

LINE BYPASS CAPACITOR 

0.0022µ /AC 250V

LINE BYPASS CAPACITOR 

0.0022µ /AC 250V

NOISE FILTER

WHT

RED

MEASURING POINT INDICATION OF OHMMETER Between N and L Approx. 680 kΩ Between terminal N and WHITE Short circuit Between terminal L and RED Short circuit

CARRY OUT 4R CHECKS.

M TOUCH CONTROL PANEL ASSEMBLY TEST

Page 19

R-9H58

TEST PROCEDURES

PROCEDURE

LETTER

COMPONENT TEST

2-3 Other possible troubles 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. d) Proper temperature measurement is not obtained.

If the display fails to clear when the STOP/CLEAR pad is depressed, first verify the flat ribbon 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.Å@If the door sensing switch (stop switch) is good, disconnect the flat ribbon that connects the key unit to the control unit and make sure the door sensing switch is closed (either close the door or short the door sensing switch connector). Use the 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.

N KEY UNIT TEST

Remove the outer case and check voltage between Pin No 9 of the 5-pin connector (A) and the common terminal of the relay RY1 on the control unit with an A.C. voltmeter. The meter should indicate 230 - 240 volts, if not check oven circuit.

Shut-off, Cook and Heater 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 or convection 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.

RELAY SYMBOL OPERATIONAL VOLTAGE CONNECTED COMPONENTS

RY1 APPROX. 21.0V D.C. Oven lamp / Turntable motor RY2(COOK) APPROX. 21.0V D.C. Power transformer RY3(HEATER) APPROX. 20.0V D.C. Heating element RY4 APPROX. 21.0V D.C. Damper motor RY5 APPROX. 21.0V D.C. Convection motor RY6 APPROX. 21.0V D.C. Cooling fan motor

O RELAY 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. If the foil pattern is open, follow the troubleshooting guide given below for repair.

Problem: POWER ON, indicator does not light up.

P PROCEDURES TO BE TAKEN WHEN THE FOIL PATTERN ON THE PRINTED WIRING BOARD

(PWB) IS OPEN

890

STOP

CLEAR

Reheat

Pie

EASY

DEFROST

LESS

POWER

LEVEL

40˚C

70˚C

130˚C

150˚C

160˚C

180˚C

200˚C

220˚C 230˚C

250˚C

HIGH MIX



LOW MIX



CONVEC

GRILL

MEMORY

REHEAT

CLOCK

HELP

REHEAT

SENSOR

MULTI COOK

Frozen

Vegetables

Desserts

Fresh

Vegetables

Jacket Potato

INSTANT COOK

START

Casseroles

G 1

G 2

G 3

G 4

G 5 G 6 G 7 G 8 G 9 G10 G11 G12

Page 20

R-9H58

STEPS OCCURRENCE CAUSE OR CORRECTION

1 The rated voltage is not applied between Pin Check supply voltage and oven power cord.

No. 9 of the 5-pin connector (A) and the common terminal of the relay RY1.

2 The rated voltage is applied to primary Power transformer or secondary circuit defective.

side of power transformer. Check and repair.

3 Only pattern at "a" is broken. *Insert jumper wire J1 and solder. 4 Pattern at "a" and "b" are broken. *Insert the coil RCILF2003YAZZ between "c" and "d".

NOTE: *At the time of making these repairs,

make a visual inspection of the varistor. check for burned damage and examine the transformer with an ohmmeter for the presence of layer short-circuit (check primary coil resistance). If any abnormal condition is detected, replace the defective parts.

TEST PROCEDURES

PROCEDURE

LETTER

COMPONENT TEST

357 9

CN - A

VRS1

CONV M FAN M POWER

(J1)

Checking the initial sensor cooking condition

(1) The oven should be plugged in at least five minutes before sensor cooking. (2) Room temperature should not exceed 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 Make sure the oven has been plugged in at least five minutes before checking sensor cook operation. The cabinet should be installed and screws tightened. (1) Fill approximately 200 milliliters (7.2 oz) of tap water in a 1000 milliliter measuring cup. (2) Place the container on the center of tray in the oven cavity. (3) Close the door. (4) Touch REHEAT SENSOR pad twice and touch INSTANT COOK/START pad.Now, the oven is

in the sensor cooking condition and "BEVE-", "RAGE", "SOUP", "SENSOR" and "REHEAT" will appear in the display.

(5) The oven will operate for the first 16 seconds, without generating microwave energy. When the AH sensor is defective (open or short), ERROR will appear in the display after 16 seconds

cleaning time. If ERROR appears check sensor wire connections and/or AH sensor. NOTE: ERROR will appear if the door is opend or STOP/CLEAR pad is touched during first stage of

sensor cooking.

(6) After approximately 16 seconds, microwave energy is produced, and the display should start to

count down the remaining cooking time and oven should turn off when water is boiling (bubling).

If the oven does not turn off, replace the AH sensor or check the control unit, refer to explanation

below.

Q AH SENSOR TEST

Page 21

R-9H58

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 oven from power supply and remove outer case. (2) Discharge the high voltage capacitor. (3) Remove the AH sensor. (4) Install the new AH sensor. (5) Re-install the outer case. (6) Reconnect the oven to the power supply and check the sensor cook operation, proceed as follows:

6-1. Fill approximately 200 milliliters (7.2 oz) of tap water in a 1000 milliliter measuring cup. 6-2. Place the container on the center of tray in the oven cavity. 6-3. Close the door. 6-4. Touch REHEAT SENSOR pad twice and touch the INSTANT COOK/START pad. 6-5. The control panel is in automatic Sensor operation. 6-6. The display will start to count down the remaining cooking time, and the oven will turn off

automatically when the water is boiling (bubling).

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

CHECKING CONTROL UNIT

(1) Disconnect oven from power supply and remove outer case. (2) Discharge the high voltage capacitor. (3) Disconnect the wire leads from the cook relay. (4) Disconnect the sensor connector that is mounted to lower portion of control panel. (5) Then connect the dummy resistor circuit (see fig.) to the sensor connector of control panel. (6) Reconnect the oven to the power supply and check the sensor cook operation, proceed as follows:

6-1. Touch REHEAT SENSOR pad twice and touch the INSTANT COOK/START pad. 6-2. The control panel is in the sensor cooking operation. 6-3. After approximately 20 seconds, push plunger of select switch. This condition is same as judgement by AH sensor.

6-4. After approximately 3 seconds, cooking operation turns off, an audible signal will sound. If the above is not the case, the control unit is probably defective. If the above is proper, the AH sensor is probably defective.

R1,R2 : 22Ω ± 1% 1/2W

R3 :10kΩ ± 5% 1/4W R4 :1MΩ ± 5% 1/4W

TEST PROCEDURES

PROCEDURE

LETTER

COMPONENT TEST

Sensor Dummy Resistor Circuit

Plunger

NC NO

COM

R3 R4

1 2 3

F-1 F-2

F-3

To connector (F) on Control Unit.

CONNECTOR

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R-9H58

TOUCH CONTROL PANEL ASSEMBLY

OUTLINE OF TOUCH CONTROL PANEL

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

(1) Key Unit (2) Control Unit

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

Key Unit

The key unit is composed of a matrix, signals generated in the LSI are sent to the key unit through P10-P17. When a key pad is touched, a signal is completed through the key unit and passed back to the LSI through R24-R27 to perform the function that was requested.

Control Unit

Control unit consists of LSI, power source circuit, synchronizing signal circuit, ACL circuit, buzzer circuit, temperature measurement circuit, absolute humidity sensor circuit and indicator circuit.

1) LSI

This LSI controls the temperature measurement signal, AH sensor signal, key strobe signal, relay driving signal for oven function and indicator signal.

2) Power Source Circuit

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

3) Synchronizing Signal Circuit

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

4) ACL Circuit

A circuit to generate a signals which resetting the LSI to the initial state when power is applied.

5) Buzzer Circuit

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

6) Temperature Measurement Circuit : (OVEN THERMISTOR)

The temperature in the oven cavity is sensed by the thermistor. The variation of resistance according to sensed temperature is detected by the temperature measurement circuit and the result applied to LSI. The LSI uses this information to control the relay and display units.

7) Absolute Humidity Sensor Circuit

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

8) Door Sensing Switch

A switch to inform the LSI if the door is open or closed.

9) Relay Circuit

To drive the magnetron, heating element, fan motor, convection motor, damper motor, turntable motor and light the oven lamp.

10) Indicator Circuit

Indicator element is a Fluorescent Display. Basically, a Fluorescent Display is triode having a cathode, a grid and an anode. Usually, the cathode of a Fluorescent Display is directly heated and the filament serves as cathode. The Fluorescent Display has 8-digits, 16-segments are used for displaying figures.

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R-9H58

DESCRIPTION OF LSI

LSI(IZA736DR):

The I/O signals of the LSI(IZA736DR) are detailed in the following table.

Pin No. Signal I/O Description

P03

ß(50Hz)

GND VP

P02

P01

P00

P37

P36

P35 P55

During cooking

20 msec.

OFF

During

cooking

GND

(Convection)

OFF

During

cooking

GND

1 VCC IN Connected to GND. 2 VEE IN Anode (segment) of Fluorescent Display light-up voltage: -30V.

Vp voltage of power source circuit input.

3 AVSS IN Power source voltage: -5V.

VC voltage of power source circuit input.

4 VREF IN Reference voltage input terminal.

A reference voltage applied to the A/D converter in the LSI. Connected to GND.(0V)

5 AN7 IN Used for initial balancing of the bridge circuit (absolute humidity sensor). This input

is an analog input terminal from the AH sensor circuit, and connected to the A/D coverter built into the LSI.

6 AN6 IN AH sensor input.

This input is an analog input terminal from the AH sensor circuit, and connected

to the A/D converter built into the LSI. 7-9 AN5-AN3 IN Heating constant compensation terminal. 10 AN2 IN Input signal which communicates the door open/close information to LSI.

Door closed; "H" level signal(0V).

Door opened; "L" level signal(-5V). 11 AN1 IN Input signal which communicates the damper open/close information to LSI.

Damper opened; "H" level signal(0V:GND).

Damper closed; "L" level signal(-5V). 12 AN0 IN Temperature measurement input: OVEN THERMISTOR.

By inputting DC voltage corresponding to the temperature detected by the

thermistor, this input is converted into temperature by the A/D converter built into

the LSI. 13 P55 OUT Digit selection signal.

The relationship between digit signal and digit are as follows;

Digit signal Digit

P03 ........................... 1st.

P02 ..........................2nd.

P01 .......................... 3rd.

P00 ...........................4th.

P37 ...........................5th.

P36 .......................... 6th.

P35 .......................... 7th.

P55 .......................... 8th.

Normally, one pulse is output in every ß period, and input to the grid of the Fluorescent Display.

14 P54 OUT Oven lamp and turntable motor driving signal. (Square Waveform : 50Hz)

To turn on and off the shut-off relay(RY1). The square waveform voltage is delivered to the relay(RY1) driving circuit.

15 P53 OUT Convection motor driving signal.

To turn on and off shut-off relay(RY5). "L" level during CONVECTION; "H" level otherwise.

16 P52 OUT Cooling fan motor driving signal.

To turn on and off shut-off relay(RY6). "L" level during both microwave and convection cooking; "H" level otherwise.

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R-9H58

Pin No. Signal I/O Description

VARI MODE ON TIME OFF TIME HIGH (100% power) 32 sec. 0 sec. MED HIGH (approx. 70% power) 24 sec. 8 sec. MED (approx. 50% power) 18 sec. 14 sec. MED LOW (approx. 30% power) 12 sec. 20 sec. LOW (approx. 10% power) 6 sec. 26 sec.

OFF

H : GND

OFF

During

cooking

GND

(Convection)

H: GND

0.12 sec

2.4 sec

1.2 sec

20 msec.

H : GND

L (-5V)

17 P51 OUT Magnetron high-voltage circuit driving signal.

To turn on and off the cook relay(RY2). In HIGH operation, the signals holds "L" level during microwave cooking and "H" level while not cooking. In other cooking modes (MED HIGH, MED, MED LOW, LOW) the signal turns to "H" level and "L" level in repetition according to the power level.

18 P50 OUT Damper motor relay driving signal.

To turn on and off shut-off relay(RY4).

19 P47 OUT Heating element driving signal.

To turn on and off shut-off relay(RY3). "L" level during convection cooking; "H" level otherwise. During convection cooking, the signal becomes "H" level when the temperature of the oven cavity

exceeds the predetermined temperature. 20-21 P46-P45 OUT Terminal not used. 22 P44 OUT Timing signal output terminal for temperature measurement(OVEN THER-

MISTOR).

"H" level (GND) : Ttermistor OPEN timing.

"L" level (-5V) : Temperature measuring timing.(Convection cooking) 23 P43 OUT Signal to sound buzzer.

A: key touch sound.

B: Completion sound.

C: When the temperature of the oven

cavity reaches the preset temperature in the preheating mode, or when the preheating hold time (30 minutes) is elapsed.

24 P42 OUT Timing signal output terminal for temperature measurement(OVEN).

"H" level (GND) : Ttermistor OPEN timing.

"L" level (-5V) : Temperature measuring timing.(Convection cooking) 25 INT1 IN Signal to synchronize LSI with commercial power source freqency.

This is the basic timing for all real time

processing of LSI.

26 P40 IN Connected to GND. 27 RST IN Auto clear terminal.

Signal is input to reset the LSI to the initial state when power is applied. Temporarily

set to "L" level the moment power is applied, at this time the LSI is reset. Thereafter

set at "H" level. 28/29 XCIN/XCOUT OUT Terminal not used. 30 XIN IN Internal clock oscillation frequency setting input.

The internal clock frequency is set by inserting the ceramic filter oscillation circuit

with respect to XOUT terminal. 31 XOUT OUT Internal clock oscillation frequency control output.

Output to control oscillation input of XIN. 32 VSS IN Power source voltage: -5V.

VC voltage of power source circuit input. 33 P27 IN Signal coming from touch key.

When any one of G-1 line keys on key matrix is touched, a corresponding signal

from P17 - P17 will be input into P27. When no key is touched, the signal is held

at "L" level. 34 P26 IN Signal similar to P27.

When any one of G-2 line key on key matrix is touched, a corresponding signal will

be input into P26.

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R-9H58

35 P25 IN Signal similar to P27.

When any one of G-3 line key on key matrix is touched, a corresponding signal will be input into P25.

36 P24 IN Signal similar to P27.

When any one of G-4 line key on key matrix is touched, a corresponding signal will be input into P24.

37 P23 OUT Segment data signals.

The relation between signals and indicators are as follows:

Signal Segment Signal Segment Signal Segment Signal Segment

P23 ............. P1 P17............. P5 P13 .............P9 P07 ........... P13

P22 ............. P2 P16............. P6 P12 ...........P10 P06........... P14

P21 ............. P3 P15............. P7 P11 ...........P11 P05........... P15

P20 ............. P4 P14............. P8 P10 ...........P12 P04........... P16

38-40 P22-P20 OUT Segment data signal.

Signal similar to P23.

41 P17 OUT Segment data signal.

Signal similar to P23.

Key strobe signal.

Signal applied to touch-key section. A pulse signal is input to P24-P27 terminal while one of G-12 line keys on key matrix is touched.

42 P16 OUT Segment data signal.

Signal similar to P23.

Key strobe signal.

Signal applied to touch-key section. A pulse signal is input to P24-P27 terminal while one of G-11 line keys on key matrix is touched.

43 P15 OUT Segment data signal.

Signal similar to P23.

Key strobe signal.

Signal applied to touch-key section. A pulse signal is input to P24-P27 terminal while one of G-10 line keys on key matrix is touched.

44 P14 OUT Segment data signal.

Signal similar to P23.

Key strobe signal.

Signal applied to touch-key section. A pulse signal is input to P24-P27 terminal while one of G-9 line keys on key matrix is touched.

45 P13 OUT Segment data signal.

Signal similar to P23.

Key strobe signal.

Signal applied to touch-key section. A pulse signal is input to P24-P27 terminal while one of G-8 line keys on key matrix is touched.

46 P12 OUT Segment data signal.

Signal similar to P23.

Key strobe signal.

Signal applied to touch-key section. A pulse signal is input to P24-P27 terminal while one of G-7 line keys on key matrix is touched.

47 P11 OUT Segment data signal.

Signal similar to P23.

Key strobe signal.

Signal applied to touch-key section. A pulse signal is input to P24-P27 terminal while one of G-6 line keys on key matrix is touched.

48 P10 OUT Segment data signal.

Signal similar to P23.

Key strobe signal.

Signal applied to touch-key section. A pulse signal is input to P24-P27 terminal while one of G-5 line keys on key matrix is touched.

49-53 P07-P03 OUT Segment data signal.

Signal similar to P23.

Pin No. Signal I/O Description

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R-9H58

Pin No. Signal I/O Description

54-56 P02-P00 OUT Digit selection signal.

Signal similar to P55.

57-59 P37-P35 OUT Digit selection signal.

Signal similar to P55.

60-64 P34-P30 OUT Used for initial balancing of the bridge circuit (absolute humidity sensor).

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.

Sensing part (Open vessel)

Sensing part (Closed vessel)

(2) Operational Principle of Absolute Humidity Sensor

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 (302˚F), 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.

Operational amplifier

Output voltage

S : Thermistor open vessel

C : Thermistor closed vessel

Absolute humidity (g/m )

Output voltage

Absolute humidity vs, output voltage characterist

(3) Detector Circuit of Absolute Humidity Sensor Circuit

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 AN6 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 R50-1. Changing the resistance values results in that there is the same potential at both F-3 terminal of the absolute humidity sensor and AN7 terminal of the LSI. The voltage of AN6 terminal will indicate about -2.5V. This initial balancing is set up about 16 seconds after the unit is put in the Sensor Cooking mode. As the sensor cooking proceeds, the food is heated to generate moisture by which the resistance balance of the bridge circuit is deviated to increase the voltage available at AN6 terminal of the LSI. Then the LSI observes that voltage at AN6 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 operation automatically. When the LSI starts to detect the initial voltage at AN6 terminal 16 seconds after the unit has been put in the Sensor Cooking mode, if it is not possible to balance, of 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

SW1

SW2 SW3 SW4

SW5

P30 P31 P32 P33 P34

LSI (IC1)

AN7

AN6

620k

300k 150k 75k

37.4k

6 7 8

62 61 60

47k

10k

0.01uF

0.015uF

0.01uF

360k

VA : -15V

R51

F-2

1.8k

F-1

F-3

3.57k

3.32k

VC : -5V

0.1

C. Thermistor in closed vesssl S. Thermistor in open vessel

IC2(IZA495DR)

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R-9H58

SERVICING

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 all 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.

approx. 1M ohm

2. Shapes of Electronic Components

3. 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 MICROWAVE OVEN IS STILL LIVE DURING SERVICING PRESENTS A HAZARD.

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

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 long enough that they may be separated from each other. For those models, therefore, it is possible to check and repair the controls of the touch control panel while keeping it apart from the oven proper; in this case you must short both ends of the door sensing switch (on PWB) of the touch control panel with a jumper, which brings about an operational state that is equivalent to the oven door being closed. As for the sensor-related controls of the touch control panel, checking them is possible if dummy resistor(s) with resistance equal to that of the controls are used.

(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).

4. Servicing Tools

Tools required to service the touch control panel assembly.

1) Soldering iron: 30W (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

5. Other Precautions

1) Before turning on the power source of the control unit, remove the aluminum 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 aluminum foil is removed, be careful that abnormal voltage due to static electricity etc. is not applied to the input or output terminals.

4) Attach connectors, electrolytic capacitors, etc. to PWB, making sure that all connections are tight.

5) Be sure to use specified components where high precision is required.

Transistor 2SB910M

Transistor

DTA123ES KRA101M KRA223M KRC243M

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R-9H58

COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE

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

operating the oven.

1. Disconnect the oven from power supply.

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

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

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

1. Door does not close firmly.

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

3. The door gasket or seal or damaged.

4. The door is bent or warped.

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

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

7. There is visible damage to the oven.

Do not operate the oven:

1. Without the RF gasket (Magnetron).

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

3. If the door is not closed.

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

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

OUTER CASE REMOVAL

To remove the outer case, proceed as follows.

1. Disconnect the oven from power supply.

2. Open the oven door and wedge it open.

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

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

5. Lift the entire case from the oven.

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

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

N.B.; Step1, 2 and 6 from the basis of the 3D checks. CAUTION: DISCHARGE HIGH VOLTAGE CAPACITOR

BEFORE TOUCHING ANY OVEN COMPONENTS OR WIRING.

REMOVAL

1. CARRY OUT 3D CHECKS.

2. Disconnect the wire leads from power transformer.

3. Disconnect the filament leads of the power transformer from the megnetron and high voltage capacitor.

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

5. Remove the two (2) screws and one (1) washer holding the transformer to the base cabinet.

6. Remove the transformer.

RE-INSTALL

1. Rest the transformer on the base cabinet with its primary terminals toward rear cabinet.

2. Insert the two edges of the transformer into two metal tabs of the base cabinet.

3. Make sure the transformer is mounted correctly to the corners underneath those tabs.

4. After re-installing the transformer, secure the transformer with two screws to the bace cabint, one is with outertooth washer and the other is without outertooth washer.

5. Re-connect the wire leads (primary and high voltage) and high voltage lead to the transformer and filament leads of transformer to the magnetron and capacitor, referring to the “Pictorial Diagram”.

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

NOTE: LIVE(ORANGE) WIRE MUST BE CONNECTED

TO THE CABINET-SIDE OF THE POWER TRANSFORMER.

POWER TRANSFORMER REPLACEMENT

1. CARRY OUT 3D CHECKS

2. Disconnect filament lead of transfomer and high voltage wire lead from magnetron.

3. Take off three (3) screws secured the chassis support to oven cavity and waveguide.

4. Remove the cooling fan assembly refer to “Cooling Fan Removal”

5. Carefully remove four (4) mounting screws holding the magnetron and magnetron air guide to waveguide.

MAGNETRON REMOVAL

When removing the screws hold the magnetron and magnetron air guide to prevent it from falling.

6. Remove the magnetron from the waveguide with care so the magnetron antenna should not hit by any metal object around the antenna

CAUTION: WHEN REPLACING THE MAGNETRON, BE

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

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R-9H58

1. CARRY OUT 3D CHECKS.

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

3. Disconnect the high voltage rectifier assembly from the capacitor.

ASYMMETRIC RECTIFIER AND HIGH VOLTAGE RECTIFIER REMOVAL

CAUTION: WHEN REPLACING HIGH VOLTAGE REC-

TIFIER ASSEMBLY, ENSURE THAT THE EARTHING SIDE TERMINAL MUST BE SECURED FIRMLY WITH AN EARTHING SCREW.

1. CARRY OUT 3D CHECKS.

2. Disconnect the high voltage wire leads and rectifier assembly from the high voltage capacitor and magnetron.

3. Disconnect filament lead of transfomer from high voltage capacitor.

4. Disconnect high voltage wire leads of capacitor from

HIGH VOLTAGE CAPACITOR REMOVAL

transformer.

5. Remove one (1) screw and washer holding the high voltage rectifier from the capacitor holder.

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

7. Remove the high voltage capacitor from the holder.

1. CARRY OUT 3D CHECKS.

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

3. Lift up the tab of oven lamp mounting plate holding the oven lamp socket.

4. Slide the oven lamp socket left-ward.

5. Now, the oven lamp socket is free.

OVEN LAMP SOCKET REMOVAL

Oven lamp socket

Terminal

Wire lead

Terminal hole

Flate type small screw driver

1. CARRY OUT 3D CHECKS.

2. Disconnect wire leads from oven thermal cut-out, convection motor, thermistor and heater element. Remove convection motor ass’y refer to “Convection Motor Removal No.3 to No.5”.

3. Remove eleven (11) screws holding heater duct to the oven cavity.

4. Release two (2) snap bands holding wire harness to the thermal protection plate (left).

5. The heater unit is now free.

HEATER UNIT ASSEMBLY REMOVAL (HEATING ELEMENT/THERMISTOR)

HEATING ELEMENT AND THERMISTOR

1. Remove two (2) screws holding heating element to heater duct.

2. Loosen two (2) screws holding holders to heater duct and take heating element out of heating element holders.

3. Heating element is free.

4. Remove two (2) screws holding thermistor to heater duct.

5. Thermistor is free.

To remove the control panel, proceed as follows:

1. CARRY OUT 3D CHECKS

2. Disconnect connector CN-A, CN-E, CN-B, CN-F, TAB1, TAB2 and TAB3 from the control unit.

3 Remove one (1) screw holding the control panel back

plate to the chassis support.

4. Remove the one (1) screw holding the bottom edge of the back plate to the cabinet base.

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

6. Lift up and pull the control panel forward.

Replacement of individual component is as follows:

CONTROL UNIT AND KEY UNIT

1. Disconnect the wire connector from the control unit.

2. Remove the four (4) screws holding the panel frame to the back plate.

CONTROL PANEL ASSEMBLY AND CONTROL UNIT REMOVAL

3. Separate the panel frame and back plate.

4. Remove the three (3) screws holding the control unit to the panel frame.

5. Lift up the control unit and disconnect the key connector from the control unit.

6. Now, the control unit and frame assembly are separated.

NOTE: 1. Before attaching a new key unit, remove

remaining adhesive on the control panel frame surfaces completely with alcohol and so on.

2. When attaching the key unit to the control panel frame, adjust the lower 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 not to scratch.

TURNTABLE MOTOR AND/OR COUPLING REMOVAL

1. Disconnect the oven from power supply.

Remove one (1) screw holding the turntable motor

cover to the base cabinet and take off the turntable motor cover.

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R-9H58

3. Disconnect wire lead from the turntable motor.

4. Remove the two (2) screws holding the turntable motor to the mounting plate of the oven cavity bottom.

5. Pull the turntable coupling out of the oven cavity.

6. Turntable coupling and motor will be free.

1. CARRY OUT 3D CHECKS.

2. Disconnect wire leads from the convection motor. Remove the convection fan belt and pulley(M).

3. Remove two (2) screws holding the convection motor mounting angle to the heater duct and base cabinet.

CONVECTION MOTOR REMOVAL

1. CARRY OUT 3D CHECKS.

2. Remove cooling fan motor and magnetron refer to “Cooling Fan Motor Removal” and “Magnetrom Removal”.

3. Disconnect wire leads from damper motor and damper switch.

4. Remove two(2) ovenside screws holding damper motor

DAMPER ASSEMBLY REMOVAL

REMOVAL

1. CARRY OUT 3D CHECKS.

2. Disconnect the wire leads from the fan motor and thermal cut-out.

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

4 Remove one (1) tab holding the fan duct to air guide .

5. Remove the fan motor assembly from the oven cavity.

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

1) Hold the edge of the rotor of the fan motor by using a pair of grove joint pliers.

CAUTION: * Make sure that any pieces do not enter the gap

between the rotor and the stator of the fan motor. Because the rotor is easy to be shaven by pliers and metal pieces may be produced.

* Do not touch the pliers to the coil of the fan motor

because the coil may be cut or injured.

* Do not transform the bracket by touching with the

pliers.

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

3) Now, the fan blade will be free.

CAUTION: * Do not use this removed fan blade again.Because

the hole(for shaft) of it may become bigger than a standard one.

FAN MOTOR REPLACEMENT

7. Remove the two (2) screws and nuts holding the fan motor and thermal cut-out mounting angle from the fun duct.

8. Now, the fan motor is free.

INSTALLATION

1. Install the fan motor and thermal cut-out angle to the fan duct with the two (2) screws and nuts.

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

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

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

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

CAUTION: * Do not hit the fan blade strongly when installed

because the bracket may be transformed.

* Make sure that the fan blade rotates smooth after

installed.

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

3. Install the fan duct to the air guide.

4. Install the chassis support to the oven cavity with three (3) screws.

5. Connect the wire leads to the fan motor and the thermal cut-out, referring to the pictorial diagram.

4. Take out the convection motor assembly from the unit. The convection motor assembly is now free.

5. Remove two (2) screws and nuts holding the motor to mounting angle.

6. Convection motor is now free.

angle to thermal protection plate (right).

5. Damper assembly is free.

6. Remove one (1) screw holding damper motor to damper motor angle and one (1) screw holding damper switch to damper motor angle.

7. Damper motor and switch are free.

Rear view

Coil

Gap

Rotor

Bracket

Stator

Groove joint pliers

Shaft

Axis

Stator

These are the position where should be pinched with pliers

Rotor

Side view

Shaft

Table

Center of bracket

Page 31

R-9H58

1. Remove the one (1) special screw holding the cord holder to the rear cabinet, using the special driver LHSTIX DLR4-100T.

2. Now, the cord holder is free.

NOTE: When securing or loosening the special screw,

LHSTIX DLR4-100T type screw driver should be used.

CORD HOLDER REMOVAL

Removal

1. CARRY OUT 3D CHECKS.

2. Disconnect the brown and blue wire leads of the power supply cord from the noise filter.

3. Remove the single (1) screw holding the green/yellow wire lead to the base plate.

4. Remove the two (2) screws holding the cord anchorages upper and lower to the base plate.

5. Pull out the power supply cord from the hole in the rear cabinet.

6. Now, the power supply cord is free.

Re-install

1. Insert the power supply cord into the hole of the rear cabinet.

POWER SUPPLY CORD REPLACEMENT

2. Hold the power supply cord to the bottom plate by fixing the cord anchorage upper and lower with the two (2) screws.

3. Earth the green/yellow wire lead of the power supply cord to the bottom plate with the single (1) screw.

4. Connect the brown and blue wire leads of the power supply to the noise filter referring to the Pictorial Diagram.

5. CARRY OUT 4R CHECKS.

Noise filter

Power supply

cord

Brown wire

Blue wire

Green/ Yellow wire

1. CARRY OUT 3D CHECKS.

2. Remove control panel assembly, refer to “Control Panel Removal”.

3. Discharge high voltage capacitor.

4. Disconnect wire leads from each of the switches.

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

6. Remove latch hook assembly from oven flange.

7. Push downward on the one (1) stopper tabs holding each of the switches place.

8. Switches are free. At this time latch lever will be free, do not lose it.

STOP SWITCH, UPPER LATCH SWITCH, LOWER LATCH SWITCH AND MONITOR SWITCH REMOVAL

Re-install

1. Re-install latch lever and each switch in its place, refer to Figure C-1.

2. Re-connect the wire leads to each switches and fuse holder. Refer to the pictorial diagram.

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

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

If those switches do not operate properly due to a

misadjustment, the following adjustment should be made.

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

2. With the door closed, adjust the latch hook by moving it back and forth and then adjust the latch hook by moving it back and forth. In and out play of the door allowed by the latch hook should be less than 0.5 mm.

3. Secure the screws with washers firmly.

4. Now, make sure of the upper and lower latch switches operations. If these latch switches are not activated with the door closed, loose the screws holding the latch hook to the oven cavity front flange and adjust the latch hook position.

After the adjustment, make sure of the following:

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

2. The upper and lower latch switches interrupt the circuit before the door can be opened.

STOP SWITCH, UPPER LATCH SWITCH, LOWER LATCH SWITCH AND MONITOR SWITCH ADJUSTMENT

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

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

LATCH HOOK

STOP SWITCH

MONITOR SWITCH

UPPER LATCH  SWITCH

LOWER LATCH  SWITCH

LATCH  HEAD

Figure C-1. Latch Switches Adjustment

Page 32

R-9H58

Remove door assembly, refer to “Door Replacement”. Replacement of door components are as follows:

1. Place door assembly on a soft cloth with latches facing up.

Note: As the engaging part of choke cover and door

panel are provided at several places, do not force any particular part.

2. Insert an putty knife (thickness of about 0.5mm) into the gap between the choke cover and corner portion of door panel as shown figure C-2 to free engaging parts.

3. Lift up choke cover.

4. Now choke cover is free from door panel.

CHOKE COVER

PUTTY KNIFE

FRONT

INSIDE

Upper

Lower

Bent

Door Panel

Choke  cover

1 BENT

2 LIFT UP

Figure C-2. Door Disassembly

DOOR REPLACEMENT AND ADJUSTMENT

DOOR REPLACEMENT

1. Disconnect oven from power supply and remove outer case. Remove turntable tray and roller stay from oven cavity.

2. Remove three (3) screws holding lower oven hinge.

3. Remove lower oven hinge from oven cavity bottom flange.

4. Remove door assembly from upper oven hinge on the oven.

5. Door assembly is now free.

Note: When individual parts are replaced, refer to “Door

Disassembly”.

6. On re-installing door, insert the upper oven hinge into the door hinge pin. Then while holding door in place.

7. Make sure door is parallel with oven face lines (left and upper side lines) and the door latch heads pass through the latch holes correctly.

8. Insert the lower oven hinge into oven cavity bottom flange and then engage the door hinge pin. Then secure the lower oven hinge firmly with three (3) mounting screws.

Note: After any service to the door; (A)Make sure that the upper and lower latch switches are

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

(B)An approved microwave survey meter should be used

to assure compliance with proper microwave radiation emission limitation standards.

DOOR ADJUSTMENT

The door is adjusted by keeping the screws of each hinge

loose. The lower oven hinge can be loosened.

DOOR DISASSEMBLY

After adjustment, make sure of the following :

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

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

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

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

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

as an electronic seal preventing the leakage of microwave energy from the oven cavity during the cook cycle. This function does not require that the door be air-tight, moisture (condensation)-tight or light-tight. Therefore, the occasional apperance of moisture, light or the sensing of gentle warm air movement around the oven door is not abnormal and do not of themselves, indicate a leakage of microwave energy from the oven cavity. If such were the case, your oven could not be equipped with a vent, the very purpose of which is to exhaust the vapor-laden air from the oven cavity.

RE-INSTALL

LOWER OVEN HINGE

UPPER OVEN HINGE

DOOR ASSEMBLY

LATCH HEADS

Page 33

R-9H58

MICROWAVE MEASUREMENT

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

REQUIREMENT

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

PREPARATION FOR TESTING:

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

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

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

2. Place the oven tray into the oven cavity.

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

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

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

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

mW cm

Microwave leakage measurement at 5 cm distance

SHARP

Page 34

R-9H58

NOTE: indicates components with potential above 250V.

SCHEMATIC

NOTE: CONDITION OF OVEN

1. DOOR CLOSED.

2. CLOCK APPERARS ON DISPLAY

Figure O-1. Oven Schematic-OFF Condition

Figure O-2. Oven Schematic-High or Easy Defrost or Reheat Sensor Cooking Condition

SCHEMATIC

NOTE: CONDITION OF OVEN

1. DOOR CLOSED.

2.VARIABLE COOKING CONTROL “HIGH”

3. COOKING TIME PROGRAMMED.

4. START PAD TOUCHED.

SCHEMATIC

NOTE: CONDITION OF OVEN

1. DOOR CLOSED.

2. “EASY DEFROST” PAD TOUCHED.

3. WEIGHT ENTERED.

4. START PAD TOUCHED.

SCHEMATIC

NOTE: CONDITION OF OVEN

1. DOOR CLOSED.

2. “REHEAT SENSOR” PAD TOUCHED.

3. START PAD TOUCHED.

THERMAL

CUT-OUT

150˚C (OVEN)

MONITOR RESISTOR

0.8/20W

MONITOR SWITCH

OVEN LAMP

FAN MOTOR

A-7

RY2

DAMPER MOTOR

CONVECTION MOTOR

TTM

TURNTABLE MOTOR

CONVECTION HEATER

MAGNETRON

POWER 

TRANSFORMER

H.V. RECTIFIER

CAPACITOR

1.13µ

AC 2100V

ASYMMETRIC

RECTIFIER

THERMAL

CUT-OUT

95˚C (FM)

RY6

RY1

RY5

RY4

TEMP.

FUSE

150˚C

FUSE

M8A

230 - 240 V ~ 50Hz

LIVE

BLU

EARTH

BRN

NEUTRAL

G-Y

LINE CROSS CAPACCCITOR

0.22µ/AC250V

NOISE

FILTER

LINE BYPASS CAPACITOR

0.0022µ/AC250V

RESISTOR 680K/0.5W

RESISTOR 10M/0.5W

NOISE SUPPRESSION COIL

LINE BYPASS CAPACITOR

0.0022µ/AC250V

COM

A-5

A-3

A-1

N.O.

LOWER

LATCH

SWITCH

N.O.

COM



RY3

A-9

E-1

E-2

E-3

E-4

E-5

E-6

F-1

F-2

F-3

CONTROL UNIT

DAMPER

SWITCH

THER-

MISTOR

STOP

SWITCH

AH SENSOR

COM.

UPPER

LATCH

SWITCH

N.O.

TEMP.

FUSE

150˚C

FUSE

M8A

230 - 240 V ~ 50Hz

LIVE

BLU

EARTH

BRN

NEUTRAL

G-Y

NOISE

FILTER

LINE BYPASS CAPACITOR

0.0022µ/AC250V

RESISTOR 680K/0.5W

RESISTOR 10M/0.5W

NOISE SUPPRESSION COIL

LINE BYPASS CAPACITOR

0.0022µ/AC250V

THERMAL

CUT-OUT

150˚C (OVEN)

MONITOR RESISTOR

0.8/20W

MONITOR SWITCH

OVEN LAMP

FAN MOTOR

A-7

A-1

RY2

RY3

DAMPER MOTOR

CONVECTION MOTOR

TTM

TURNTABLE MOTOR

CONVECTION HEATER

MAGNETRON

POWER 

TRANSFORMER

H.V. RECTIFIER

CAPACITOR

1.13µ

AC 2100V

ASYMMETRIC

RECTIFIER

THERMAL

CUT-OUT

95˚C (FM)

RY6

RY1

RY5

RY4

LINE BYPASS CAPACITOR

0.22µ/AC250V

COM

A-5

A-3

A-1

N.O.

LOWER

LATCH

SWITCH

N.O.

COM



RY3

A-9

E-1

E-2

E-3

E-4

E-5

E-6

F-1

F-2

F-3

CONTROL UNIT

DAMPER

SWITCH

THER-

MISTOR

STOP

SWITCH

AH SENSOR

COM.

UPPER

LATCH

SWITCH

N.O.

Page 35

R-9H58

NOTE: indicates components with potential above 250V.

SCHEMATIC

NOTE: CONDITION OF OVEN

1. DOOR CLOSED.

2. CONVECTION PAD TOUCHED.

3. DESIRED TEMP. PAD TOUCHED.

4. START PAD TOUCHED.

Figure O-3. Oven Schematic-Convection Cooking Condition

SCHEMATIC

NOTE: CONDITION OF OVEN

1. DOOR CLOSED.

2. MIX COOKING PAD TOUCHED.

3. COOKING TIME PROGRAMMED.

4. START PAD TOUCHED.

NOTE: Relay RY2 and RY3 operate

alternately.

COM

A-5

A-3

A-1

N.O.

LOWER

LATCH

SWITCH

N.O.

COM



RY3

A-9

E-1

E-2

E-3

E-4

E-5

E-6

F-1

F-2

F-3

CONTROL UNIT

DAMPER

SWITCH

THER-

MISTOR

STOP

SWITCH

AH SENSOR

COM.

UPPER

LATCH

SWITCH

N.O.

TEMP.

FUSE

150˚C

FUSE

M8A

230 - 240 V ~ 50Hz

LIVE

BLU

EARTH

BRN

NEUTRAL

G-Y

NOISE

FILTER

LINE BYPASS CAPACITOR

0.0022µ/AC250V

RESISTOR 680K/0.5W

RESISTOR 10M/0.5W

NOISE SUPPRESSION COIL

LINE BYPASS CAPACITOR

0.0022µ/AC250V

THERMAL

CUT-OUT

150˚C (OVEN)

MONITOR RESISTOR

0.8/20W

MONITOR SWITCH

OVEN LAMP

FAN MOTOR

A-7

A-1

RY2

DAMPER MOTOR

CONVECTION MOTOR

TTM

TURNTABLE MOTOR

CONVECTION HEATER

MAGNETRON

POWER 

TRANSFORMER

H.V. RECTIFIER

CAPACITOR

1.13µ

AC 2100V

ASYMMETRIC

RECTIFIER

THERMAL

CUT-OUT

95˚C (FM)

RY6

RY1

RY5

RY4

LINE BYPASS CAPACITOR

0.22µ/AC250V

TEMP.

FUSE

150˚C

FUSE

M8A

230 - 240 V ~ 50Hz

LIVE

BLU

EARTH

BRN

NEUTRAL

G-Y

NOISE

FILTER

LINE BYPASS CAPACITOR

0.0022µ/AC250V

RESISTOR 680K/0.5W

RESISTOR 10M/0.5W

NOISE SUPPRESSION COIL

LINE BYPASS CAPACITOR

0.0022µ/AC250V

THERMAL

CUT-OUT

150˚C (OVEN)

MONITOR RESISTOR

0.8/20W

MONITOR SWITCH

OVEN LAMP

FAN MOTOR

A-7

A-1

RY2

DAMPER MOTOR

CONVECTION MOTOR

TTM

TURNTABLE MOTOR

CONVECTION HEATER

MAGNETRON

POWER 

TRANSFORMER

H.V. RECTIFIER

CAPACITOR

1.13µ

AC 2100V

ASYMMETRIC

RECTIFIER

THERMAL

CUT-OUT

95˚C (FM)

RY6

RY1

RY5

RY4

LINE BYPASS CAPACITOR

0.22µ/AC250V

COM

A-5

A-3

A-1

N.O.

LOWER

LATCH

SWITCH

N.O.

COM



RY3

A-9

E-1

E-2

E-3

E-4

E-5

E-6

F-1

F-2

F-3

CONTROL UNIT

DAMPER

SWITCH

THER-

MISTOR

STOP

SWITCH

AH SENSOR

COM.

UPPER

LATCH

SWITCH

N.O.

Figure O-4. Oven Schematic-Automatic Mix Cooking Condition

Page 36

R-9H58

Figure S-1. Pictorial Diagram

HV. RECTIFIER

O RG

ASYMMETRIC 

RECTIFIER

MAGNETRON

RED

HV. WIRE A

RED

GRY

HIGH VOLTAGE COMPONENTS

TURNTABLE 

MOTOR

GRY

BRN

GRY

YLW

DAMPER 

MOTOR

DAMPER 

SWITCH

FAN 

MOTOR

OVEN

THERMAL

CUT-OUT

150˚C

ORG

OVEN 

LAMP

BLACK 

DOT

STOP SWITCH

I

C

RED

654

123

PNK

RED

GRN

CN-F

CN-E

PPL

BRN

RED

CN-A

N.O.

COM

RED

BRN

CN-E

ORG

BRN

UPPER

LATCH

SWITCH

MONITOR 

RESISTOR

GRY

PPL

CONTROL PANEL

TEMP.

FUSE

(MG.)

150˚C

CONVECTION

HEATER

THERMISTOR

HIGH VOLTAGE

CAPACITOR

POWER

TRANSFORMER

CONVECTION 

MOTOR

GRN

COM

N.O.

GRY

WHT

PRLWHT

WHT

REDWHT

N.O.

COM

PNK

BRN

GRY

RED

BRN

COM

N.O.

ORG

PNK

LOWER

LATCH

SWITCH

MONITOR 

SWITCH

COM

N.C.

PPL

ORG

BLK

AH SENSOR

RED

WHT

123

CN-F

RY3

RY2

CN-A

FAN MOTOR

THERMAL

CUT-OUT

95˚C

RED

BLK

RED

GRY

RED

WHT

RED RED

RY1

231

357

N.O.

COM

RY3(N.O.)

RY3(COM.)

RY2(N.O.)

BRN

RY2(COM.)

BRN

RED

RY1(N.O.)

PNK

BLK

RY1(COM.)

WHT

NOTE:

Neutral (WHT) wire must be

connected to the terminal

with black dot on the oven

light socket.

GRN

GRY

NOTE: ORANGE WIRE (LIVE) MUST BE

CONNECTED TO THE CABINET

SIDE TERMINAL OF POWER

TRANSFORMER

P[OWER

SUPPLY 

CORD

WHT

RED

BLU

BRN

G-Y

NOISE FILTER UNIT

FUSE

Page 37

R-9H58

Figure S-2. Contrl Panel Circuit

–

E1 E2 E5 E6 E3 E4 F1 F2 F3

G 1

G 2

G 3

G 4

G 5 G 6 G 7 G 8 G 9 G10 G11 G12

COM

VRS1

C1 0.1µ/50v

C22 0.1µ/50v

C3 0.1µ/50v

C5 0.1µ/50v

C9 0.01µ/50v

C4 10µ/35v

C6 10µ/35v

C2 1000µ/35v

ZD2

ZD3

C11

22µ

/25v

ZD4

470 1/2w

HZ16-1

HZ5C2

HZ4A2

R7 4.7k

(J1)

D20D21D22D24

C20 10µ/35v

C21 0.1µ/50v

R30 15k

R50 15k

R63 100F

R64 2.2kF

R70 3.3k

IC1 IZA736DR

R71 3.3k

R72 3.3k

R73 3.3k

R74

3.3k

R75

3.3k

R76

3.3k

R79

3.3k

R80

3.3k

R81

3.3k

R77

3.3k

R78

3.3k

D70

D71

D72

D73

D74

D75

D76

D77

(J2)

(J4)

(J6)

(J3)

(J5)

(J7)

R100 330 1w

7G 28

6G 27

5G 26

4G 25

3G 24

2G 23

1G 22

P16

P15

P14

P13

P12

P11

P10

P9 12

P8 11

P7 10

P6 9

R91

R92

R93

100k

D25D26

D31

D23

SP40

R40 3.3k

R8 4.7k

10G471K

RY4

RY5

DAMPER

MOTOR

AC230-240V

50Hz

CONV.

MOTOR

FAN

MOTOR

POWER

TRANSFORMER

HEATING

ELEMENT

DOOR

SWITCH

DAMPER

SWITCH

OVEN

THERMISTOR

AH SENSOR

OVEN LAMP

TURNTABLE

MOTOR

RY6

RY2

D30

RY3

RY1

R31 4.7k

R51 4.7k

R62 75kF

CF1 4.19MHz

C70 330pF x 4

(A) (B) (C)

C30 C50 C60

Q1

2SB1238

Q4

DTA123ES

Q3

KRA101M

Q90

KRA101M

Q40

KRA101M

Q21

KRA101M

Q22

KRA101M

Q24

KRA101M

Q25

KRA101M

Q23

KRA101M

Q26

KRC243M

Q20

KRA101M

R10 18 1w

CONTROL UNIT

C10 0.1µ/50v

(VP)

FF8G

31, 32

1, 2

MIX CONV

DEFROST

SENSOR

COOK KG HELP

R90 100k

IC2 IZA495DR

FLUORESCENT DISPLAY TUBE

NOTE : IF NOT SPECIFIED. 1/4w ± 5%

: IF NOT SPECIFIED. 0.01µ/16v

: IF NOT SPECIFIED. 1SS270A

R11 18 1w

R3 330 1/2w

D1-4 : 11ES1

R4 750 1/2w



VREF

AN7

AN6

AN5

AN4

AN3

AN2

AN1

AN0

P55

P54

P53

P52

P51

P50

P47

P46

P45

P44

P43

P30

P31

P32

P33

P34

P35

P36

P37

P00

P01

P02

P03

P04

P05

P06

P07

P10

P11

P12

P13

P14

P15

P16

P17

P20

P21

P22

P23

P24

P25

P26

P27

P42

P40

RST

XCIN

XCOUT

XIN

XOUT

VSS

INT1

VCC 1

32 33

VEE

AVSS

STOP

CLEAR

MULTI

COOK

REHEAT

SENSOR

POWER

LEVEL

REHEAT

HELP

KEY UNIT

180˚C 200˚C 220˚C 230˚C 250˚C

67890

40˚C 70˚C 130˚C 150˚C 160˚C

12345

EASY

DEFROST

Reheat

Pie

Jacket

Potato

Frozen

Vegetables

Fresh

Vegetables

INSTANT COOK

START

LOW MIX

CONVEC HIGH MIX GRILL

LESS

Desserts

CLOCK MEMORY

Casseroles

Page 38

R-9H58

Figure S-3. Printed Wiring Board

654321

1357 9

45 7 8

33 64

CONV HEATER

COM

RED BRN

ORG

BLK

PINK RED (BRN

RED)

D25

RY3

RY2

RY1

RY5

RY4

RY6

C11

R10 R11

D31 D30

D24

D23

Q40

Q25

Q24

Q21

Q20

ZD3

ZD4

10 11 12

(J7)

(J2) (J4)

(J6)

(J5) (J3)

C10

(C81)

(C80)

(C45)

(R47)

(C46)

(C47)

(R48)

(R49)

(CN - D)

(CN - G)

CN - G

CN - F

CN - E

(ONLY 9X58PJ)

C21

C22 C1

C60

C50

C30

(R45)

R91 R92

R93

R64

R80 R81

R73

D70 D71 D72 D73 D74 D75 D76 D77

R72 R71 R70

R79

R78 R77 R76 R75

R74

R86(J8)

R90

R100

R40

DAMP

DOOR

OVEN

TEMP

R50

R51

R31

R30

POWER TRANS

POWER

OL TTM

R62

C20

CN - A

ZD2

Q23

Q26

Q22

R63

D26

D21

D20

D22

VRS1

DAMP M CONV M FAN M POWER

(J1)

S1 S2

(R46)

IC1

IC2

IC3

(R85)

(CF1)

(ONLY

PHR)

CF1

C70

Q90

DIP



Page 39

R-9H58

PARTS LIST

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

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

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

* *

∆

ELECTRICAL PARTS

1- 1 FH-DZA058WRK0 High voltage rectifier assembly 1 AL 1- 2 FH-HZA041WRE0 Thermistor assembly 1 AN 1- 3 QACCAA043WRE0 Power supply cord 1 AW 1- 4 QFS-CA010WRE0 Fuse (M8A) 1 AE 1- 5 QFS-TA013WRE0 Temperature fuse 150˚C 1 AG 1- 6 FPWBFA287WRK0 Noise filter 1 AS 1- 7 QSOCLA022WRE0 Oven lamp socket 1 AG 1- 8 QSW-MA111WRE0 Monitor switch 1 AK 1- 9 QSW-MA110WRE0 Stop switch and Damper switch 2 AK 1-10 QSW-MA110WRE0 Upper and lower latch switches 2 AK 1-11 RC-QZA075WRE0 High voltage capacitor 1 AU 1-12 RHET-A139WRE0 Convection heater 1 AY 1-13 RLMPTA069WRE0 Oven lamp 1 AK 1-14 RMOTDA191WRE0 Damper motor 1 AS 1-15 RMOTDA097WRE0 Turntable motor 1 AV 1-16 RMOTEA303WRE0 Cooling fan motor 1 AX 1-17 RMOTEA284WRE0 Convection motor 1 AZ 1-18 RR-WZA003WRE0 Monitor resistor 0.8Ω 20W 1 AG 1-19 RTHM-A085WRE0 Thermal cut-out 150˚C (OVEN) 1 AL 1-20 RTHM-A079WRE0 Thermal cut-out 95˚C (FM) 1 AL 1-21 RTRN-A318WRE0 Power transformer 1 BP 1-22 RV-MZA114WRE0 Magnetron 1 BG 1-23 FDTCTA157WRK0 AH sensor assembly 1 AY

CABINET PARTS

2- 1 FDAI-A181WRY0 Base plate assembly 1 AR 2-1-1 GCOVHA156WRP0 Turntable motor cover 1 AB 2-1-2 XHTSD40P08RV0 Screw; 4mm x 8mm 1 AA 2- 2 FHNG-A092WRM0 Oven hinge (Lower) 1 AF 2- 3 GCABDA074WRW0 Rear cabinet 1 AG 2- 4 GCABUA463WRP0 Outer case cabinet 1 BF 2- 5 PHOK-A043WRF0 Latch hook 1 AM 2- 6 GFTARA001WRW0 Oven lamp access cover 1 AC 2- 7 GLEGPA019WRE0 Foot 4 AD 2- 8 LBNDKA036WRP0 Capacitor holder 1 AG 2- 9 LBSHC0032WRE0 Cord bushing 1 AB 2-10 LSTPPA141WRF0 Cord anchorage (Upper) 1 AD 2-11 LSTPP0009YBF0 Cord anchorage (Lower) 1 AC 2-12 MLEVPA122WRF0 Latch lever 1 AD

CONTROL PANEL PARTS

3- 1 CPWBFA706WRK0 Control unit (New Zealand only) 1 BT 3- 1A QCNCMA227DRE0 5-pin connector(A) 1 AC 3- 1B QCNCMA267DRE0 6-pin connector(E) 1 AC 3- 1C QCNCMA237DRE0 3-pin connector(F) 1 AD 3- 1D QCNCWA057DRE0 12-pin connector(G) 1 AF 3- 1E RV-KXA077DRE0 Fluorescent display tube 1 AY 3- 1F PCUSGA381WRP0 Cushion 2 AG C1 RC-KZA087DRE0 Capacitor 0.1µF 50V 1 AB C2 VCEAB31VW108M Capacitor 1000µF 35V 1 AF C3 RC-KZA087DRE0 Capacitor 0.1µF 50V 1 AB C4 VCEAB31VW106M Capacitor 10µF 35V 1 AA C5 RC-KZA087DRE0 Capacitor 0.1µF 50V 1 AB C6 VCEAB31VW106M Capacitor 10µF 35V 1 AA C7-8 VCKYD11CY103N Capacitor 0.01µF 16V 2 AH C9 VCTYF31HF103Z Capacitor 0.01µF 50V 1 AB C10 RC-KZA087DRE0 Capacitor 0.1µF 50V 1 AB C11 VCEAB31EW226M Capacitor 22µF 25V 1 AA C20 VCEAB31VW106M Capacitor 10µF 35V 1 AA C21 VCEAB31HW104M Capacitor 0.1µF 50V 1 AM C22 RC-KZA087DRE0 Capacitor 0.1µF 50V 1 AB C30 VCKYD11CY103N Capacitor 0.01µF 16V 1 AH C50 VCKYD11CY103N Capacitor 0.01µF 16V 1 AH C60 VCKYD11CY103N Capacitor 0.01µF 16V 1 AH C70 RMPTEA009DRE0 Capacitor array 330pF x 4 1 AE CF1 RCRS-A035DRE0 Ceramic resonator (CST4.19MGW) 1 AG D1-4 VHD11ES1///-1 Diode (11ES1) 4 AB D7 VHD1SS270A/-1 Diode (1SS270ATA) 1 AA D20-26 VHD1SS270A/-1 Diode (1SS270ATA) 7 AA D30-31 VHD1SS270A/-1 Diode (1SS270ATA) 2 AA D70-77 VHD1SS270A/-1 Diode (1SS270ATA) 8 AA IC1 RH-IZA736DRE0 LSI 1 AX

Page 40

R-9H58

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

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

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

∆

IC2 RH-IZA495DRE0 IC 1 AL Q1 VS2SB910MR/-4 Transistor (2SB910M) 1 AE Q3 VSKRA101M//-3 Transistor (KRA101M) 1 AB Q4 VSDTA123ES/-3 Transistor (DTA123E) 1 AA Q20-23 VSKRA101M//-3 Transistor (KRA101M) 4 AB Q24-25 VSKRA223M//-3 Transistor (KRA223M) 2 AB Q26 VSKRC243M//-3 Transistor (KRC243M) 1 AB Q40 VSKRA101M//-3 Transistor (KRA101M) 1 AB Q90 VSKRA101M//-3 Transistor (KRA101M) 1 AB R2 VRD-B12HF471J Resistor 470 ohm 1/2W 1 AA R3 VRD-B12HF331J Resistor 330 ohm 1/2W 1 AA R4 VRD-B12HF751J Resistor 750 ohm 1/2W 1 AA R7-8 VRD-B12EF472J Resistor 4.7k ohm 1/4W 2 AA R10-11 VRS-B13AA180J Resistor 18 ohm 1W 2 AA R30 VRD-B12EF153J Resistor 15k ohm 1/4W 1 AA R31 VRD-B12EF472J Resistor 4.7k ohm 1/4W 1 AA R40 VRD-B12EF332J Resistor 3.3k ohm 1/4W 1 AA R50 VRD-B12EF153J Resistor 15k ohm 1/4W 1 AA R51 VRD-B12EF472J Resistor 4.7k ohm 1/4W 1 AA R62 VRN-B12EK753F Resistor 75k ohm(F) 1/4W 1 AA R63 VRN-B12EK101F Resistor 100 ohm(F) 1/4W 1 AA R64 VRN-B12EK222F Resistor 2.2k ohm(F) 1/4W 1 AA R70-81 VRD-B12EF332J Resistor 3.3k ohm 1/4W 12 AA R90-93 VRD-B12EF104J Resistor 100k ohm 1/4W 4 AA R100 VRS-B13AA331J Resistor 330 ohm 1W 1 AA RY1-3 RRLY-A083DRE0 Relay (OMIF-S-118LM) 3 AK RY4-6 RRLY-A078DRE0 Relay (OJ-SS-118LM) 3 AG SP40 RALM-A014DRE0 Buzzer (PKM22EPT) 1 AG T1 RTRNPA089DRE0 Transformer 1 AU VRS1 RH-VZA032DRE0 Varistor (10G471K) 1 AE ZD2 VHEHZ161///-1 Zener diode (HZ16-1) 1 AA ZD3 VHEHZ5C2///-1 Zener diode (HZ5C-2) 1 AA ZD4 VHEHZ4A2///-1 Zener diode (HZ4A2) 1 AA 3- 2 FPNLCB249WRK0 Control panel frame with key unit 1 BB 3- 2-1 FUNTKA769WRE0 Key unit 1 BA 3- 2-2 HPNLCA800WRF0 Panel grill 1 AL 3- 3 JBTN-A766WRF0 Open button 1 AG 3- 4 MSPRCA050WRE0 Open button spring 1 AB 3- 5 LANGTA197WRW0 Control panel back plate 1 AK 3- 6 MLEVFA057WRW0 Open lever 1 AE 3- 7 NSFTTA042WRE0 Open shaft 1 AE 3- 8 XEPSD30P10XS0 Screw ; control unit mtg. 3 AA 3- 9 XCPSD40P12000 Screw ; control panel back plate mtg. 4 AA

OVEN PARTS

4- 1 FBRGMA002WRE0 Bearing assembly 1 AQ 4- 2 FDUC-A124WRW0 Steam duct assembly 1 AN 4- 3 NFANJA020WRE0 Cooling fan 1 AE 4- 4 FFTA-A034WRK0 Damper ass’y 1 AM 4- 5 FOVN-A316WRY0 Oven cavity 1 AX 4- 6 FROLPA072WRK0 Roller stay 1 AL 4- 7 LANGFA089WRW0 Chassis support 1 AE 4- 8 LANGQA407WRW0 Convection motor mounting plate 1 AG 4- 9 LANGQA213WRW0 Lamp socket mounting angle 1 AE 4-10 LANGQA369WRP0 Thermal cut-out mounting angle 1 AB 4-11 LANGTA196WRW0 Bearing mounting plate 1 AD 4-12 LBNDK0054WRE0 Heater element holder 2 AB 4-13 LFIX-A013WRW0 Bearing holder plate 1 AB 4-14 LHLDKA009WRF0 Cord holder 1 AD 4-15 MCAMPA030WRF0 Damper cam 1 AC 4-16 MHNG-A165WRM0 Oven hinge (upper) 1 AE 4-17 NBLTKA005WRE0 Convection fan belt 1 AF 4-18 NCPL-A021WRF0 Turntable coupling 1 AE 4-19 NFANMA019WRW0 Convection fan 1 AE 4-20 PCUSGA236WRP0 Cushion 1 AC 4-21 NPLYBA025WRF0 Pulley (F) 2 AC 4-22 NSFTTA114WRE0 Damper shaft 1 AB 4-23 NTNT-A019WRH0 Turntable tray 1 AT 4-24 PCOVPA301WRE0 Waveguide cover 1 AE 4-25 PCOVPA292WRF0 AH sensor cover 1 AD 4-26 PCUSGA410WRP0 Transformer cushion D 1 AD 4-27 PCUSUA424WRP0 Magnetron duct cushion 1 AG 4-28 PCUSUA196WRP0 Cushion 2 AD 4-29 PCUSUA425WRP0 Cushion 1 AG 4-30 PCUSUA197WRP0 Steam cushion C 2 AD 4-31 FDUC-A279WRK0 Heater duct assembly 1 AT

Page 41

R-9H58

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

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

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

∆ ∆

4-32 PDUC-A269WRW0 Damper duct 1 AK 4-33 PDUC-A270WRF0 Cooling fan duct 1 AL 4-34 PFPF-A138WRE0 Thermal protection sheet (Left) 1 AK 4-35 PREFHA028WRW0 Thermal protection plate (Left) 1 AS 4-36 PFPF-A139WRE0 Thermal protection sheet (Right) 1 AF 4-37 PGLSPA485WRE0 Oven lamp screen 1 4-38 PREFHA053WRW0 Thermal protection plate (Right) 1 AQ 4-39 PCUSUA167WRP0 Cushion 2 AF 4-40 PFPF-A064WRE0 Thermal protection sheet 1 AE 4-41 PSKR-A153WRW0 Air guide (Bottom) 1 AK 4-42 PSKR-A171WRW0 Magnetron air guide 1 AF 4-43 PSKR-A161WRW0 Air guide (Right) 1 AF 4-44 LANGQA065WRP0 Noise unit angle 1 AD

DOOR PARTS

5 CDORFA747WRK0 Door assembly, complete. 1 BS 5- 1 DDORFA711WRY0 Door panel 1 BG 5- 2 GCOVHA155WRF0 Choke cover 1 AP 5- 3 GWAKPA142WRF0 Door frame 1 AT 5- 4 HDECQA123WRF0 Door sash (right) 1 AF 5- 5 HDECQA124WRF0 Door sash (left) 1 AF 5- 6 LSTPPA045WRF0 Upper latch head 1 AB 5- 7 LSTPPA046WRF0 Lower latch head 1 AB 5- 8 MSPRTA163WRE0 Latch spring 1 AD 5- 9 NSFTTA044WRE0 Latch shaft 1 AC 5-10 PGLSPA487WRE0 Door glass 1 BC

MISCELLANEOUS

6- 1 FAMI-A087WRM0 High rack 1 AW 6- 2 FAMI-A088WRM0 Low rack 1 AW 6- 3 TCADCA546WRR0 Cook book 1 AZ 6- 4 TINSEA684WRR0 Operation manual 1 AK 6- 5 TLABNA191WRR0 Menu label 1 AD 6- 6 FW-VZB534WRE0 Main wire harness 1 BC 6- 7 QW-QZA202WRE0 High voltage wire A 1 AK 6- 8 TSPCNC359WRR0 Name plate 1 AF 6- 9 FW-VZB342WRE0 Thermistor harness 1 AN 6-10 TCAUHA214WRR0 Caution label 1 AF

SCREWS, NUTS AND WASHERS

7- 1 XHTSD40P08RV0 Screw; 4mm x 8mm 6 AA 7- 2 LX-BZ0202WRE0 Special screw 2 AB 7- 3 LX-CZA020WRE0 Special screw 6 AA 7- 4 XCTWW40P08000 Screw; 4mm x 8mm 2 AA 7- 5 XCBWW30P06000 Screw; 3mm x 6mm 4 AA 7- 6 LX-CZ0052WRE0 Special screw 2 AA 7- 7 XBPSD40P06KS0 Screw; 4mm x 6mm 2 AA 7- 8 XOTWW40P10000 Screw; 4mm x 10mm 13 AA 7- 9 XBPSD30P14K00 Screw; 3mm x 14mm 1 AA 7-10 XOTSD40P12RV0 Screw; 4mm x 12mm 11 AA 7-11 XBPSD40P25000 Screw; 4mm x 25mm 2 AA 7-12 XFPSD40P25000 Screw; 4mm x 25mm 2 AA 7-13 LX-CZA030WRE0 Special screw 2 AA 7-14 XBTWW40P06000 Screw; 4mm x 6mm 8 AA 7-15 XCPSD30P06000 Screw; 3mm x 6mm 5 AA 7-16 XWVSD60-07000 Washer; 6mm x 0.7mm 1 AA 7-17 XCPSD30P08X00 Screw; 3mm x 8mm 6 AA 7-18 XCPSD30P08000 Screw; 3mm x 8mm 3 AA 7-19 XCPSD40P08000 Screw; 4mm x 8mm 7 AA 7-20 XCTSD40P08000 Screw; 4mm x 8mm 7 AA 7-21 XFPSD30P08000 Screw; 3mm x 8mm 2 AA 7-22 XFPSD40P08K00 Screw; 4mm x 8mm 5 AA 7-23 XFPSD40P08000 Screw; 4mm x 8mm. 5 AA 7-24 XFPSD60P14JS0 Screw; 6mm x 14mm 2 AC 7-25 XNESD40-32000 Nut; 4mm x 3.2mm 4 AA 7-26 XNEUW40-32000 Nut; 4mm x 3.2mm 1 AA 7-27 XOTSE40P12000 Screw; 4mm x 12mm 4 AA 7-28 LX-WZA004WRE0 Washer 1 AA 7-29 XOTSD40P12000 Screw; 4mm x 12mm 8 AA 7-30 XWSUW40-10000 Washer; 4mm x 1mm 1 AA 7-31 LX-WZA022WRE0 Washer 1 AA 7-32 LX-CZA060WRE0 Special screw 1 AC

Page 42

R-9H58

HOW TO ORDER REPLACEMENT PARTS

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

1. MODEL NUMBER 2. REF. NO.

3. PART NO. 4. DESCRIPTION

TURNTABLE TRAY

INSTRUCTION BOOK

AND COOK BOOK

ROLLER STAY

TRAY PACKING FOAM SPADPA198WRE0

DOOR PROTECTION SHEET SPADPA178WRE0

MICROWAVE OVEN

PACKING PAD KIT CPADBA083WRK0

PLASTIC BAG SSAKHA012WRE0

TRAY HOLDER

(SPADFA348WRE0)

Not replaceable items.

PACKING CASE SPAKCC803WRE0

PACKING AND ACCESSORIES

Page 43

R-9H58

OVEN AND CABINET PARTS

1-13 1-7

7-29

7-10

7-20

7-19

7-1

7-29

1-22

4-3

7-22

4-33

4-42

4-27

7-25

1-16

7-11

TO OVEN 

BASE PLATE

7-4

4-13

4-1

4-21

7-8

4-17

4-34

1-12

7-5

7-30

7-26

4-19

7-14

1-2

7-5

7-8

7-7

4-21

1-17

4-8

4-12

4-5

4-18

4-24

7-14

7-20

7-21

4-23

4-6

2-8

1-1

7-19

7-8

1-10

4-26

1-9 4-36

4-38

4-22

4-32

7-9

7-19

4-4

1-9

1-14

7-15

4-15

7-24

7-16

1-21

4-20

4-39

7-10

2-7

2-1-2

2-1-1

7-23

4-41

7-28

1-23

4-25

4-2

4-30

4-28

4-11

7-31

4-28

4-29

2-11

4-7

4-37

7-22

6-9

1-15

2-1

1-11

7-23

7-22

4-35

6-10

2-6

7-14

2-3

7-32

7-6

4-31

6-5

2-12

2-5

1-8

2-4

7-29

7-13

x 3

7-27

2-2

7-3

4-16

7-3

1-19

7-15

4-39

7-10

1-10



4-14

1-5

4-43

7-1

7-13

4-9

4-40

7-1

1-18

7-22

7-12

2-10

1-3

2-9

7-29

7-22

7-1

4-10

1-20

7-15

1-4

7-1

1-6

4-44

Page 44

R-9H58

'96SHARP CORP. (8K0.820E) Printed in Australia

CONTROL PANEL PARTS

DOOR PARTS

MISCELLANEOUS

5-1

5-10

7-17

5-5

5-3

7-25

5-2

7-2

5-7

5-8

5-9

5-6

7-18

7-19

7-17

5-4

Actual wire harness may be different than illustration.

6-9

6-7

6-2

6-1

6-6

3-2

3-1

3-8

3-5

3-9

3-6

3-7

7-10

6-8

3-3

3-4

7-10

3-2-1

x 3

x 4

3-2-2

3-1E

3-1F