SHARP R1490, R-1491, R-1492 Service Manual

SER VICE MANU AL

S4808R1490X//

OVER THE RANGE

MICROWAVE OVEN

R-1490
R-1491
R-1492

MODELS

R-1490
R-1491

S e n s o r C o o k i n g

Custom 
Help

Popucorn Reheat

Baked

potatoes



Frozen

Frozen

vegetablest

Frozen

entrees

vegetables





Ground

meat

Fresh/

Rice

seafood

Compu

Compu

Cook

Defrost

12345
67890

Power

Kitchen Timer

Level

Minute

Clock

Plus

Turntable

Stop

On/Off

Start

Clear

Touch On

Work

Night

Light

Fan

Light

Hi/Lo

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

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

This is a supplemental Service Manual for Models R-1490, R-1491 and R-1492. These models are quite similar to
base model R-1480,R-1481 and R-1482. Use this supplemental manual together with the Base Models Service
Manual (Refer No. is S3807R1480X//) for complete operation, service information, etc..

TABLE OF CONTENTS

PRECAUTIONS TO BE OBSERVED BEFORE AND DURING SERVICING TO

AVOID POSSIBLE EXPOSURE TO EXCESSIVE MICROWAVE ENERGY ...................INSIDE FRONT COVER

BEFORE SERVICING ......................................................................................................INSIDE FRONT COVER

WARNING TO SERVICE PERSONNEL................................................................................................................1

MICROWAVE MEASUREMENT PROCEDURE ...................................................................................................2

FOREWORD AND WARNING...............................................................................................................................3

PRODUCT SPECIFICATIONS ..............................................................................................................................4

GENERAL INFORMATION...................................................................................................................................4

OPERATION..........................................................................................................................................................6

TROUBLESHOOTING GUIDE ..............................................................................................................................8

TEST PROCEDURE ..............................................................................................................................................9

TOUCH CONTROL PANEL ASSEMBLY ............................................................................................................11

CONPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE ................................................................13

PICTORIAL DIAGRAM ........................................................................................................................................15

CONTROL PANEL CIRCUIT ...............................................................................................................................16

PARTS LIST ........................................................................................................................................................17

PACKING AND ACCESSORIES .........................................................................................................................22

R-1492

Page

SHARP CORPORATION

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

R-1490
R-1491
R-1492

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

(a) Do not operate or allow the oven to be operated with the door open.
(b) Make the following safety checks on all ovens to be serviced before activating the magnetron or other

microwave source, and make repairs as necessary: (1) interlock operation, (2) proper door closing, (3)
seal and sealing surfaces (arcing, wear, and other damage), (4) damage to or loosening of hinges and
latches, (5) evidence of dropping or abuse.

(c) Before turning on microwave power for any service test or inspection within the microwave generating

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

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

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

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

performed on each oven prior to releasing oven to the owner.

BEFORE SERVICING

Before servicing an operative unit, perform a microwave emission check as per the Microwave
Measurement Procedure outlined in this service manual.
If microwave emissions level is in excess of the specified limit, contact SHARP ELECTRONICS
CORPORATION immediately @1-800-237-4277.

If the unit operates with the door open, service person should 1) tell the user not to operate the oven
and 2) contact SHARP ELECTRONICS CORPORATION and Food and Drug Administration's
Center for Devices and Radiological Health immediately.

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

WARNING TO SERVICE PERSONNEL

Microwave ovens contain circuitry capable of pro­ducing very high voltage and current, contact with
following parts
fatal, electrical shock.

(Example)
High Voltage Capacitor, High Voltage Power Trans-

former, Magnetron, High Voltage Rectifier Assem­bly, High Voltage Harness etc..

Read the Service Manual carefully and follow all
instructions.

may result in a severe, possibly

Don't Touch !
Danger High Voltage

R-1490
R-1491
R-1492

Before Servicing

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

2. Open the door and block it open.

3. Discharge high voltage capacitor.

WARNING:RISK OF ELECTRIC SHOCK.

DISCHARGE THE HIGH-VOLTAGE
CAPACITOR BEFORE SERVICING.

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

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

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

2. Open the door and block it open.

3. Discharge high voltage capacitor.

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

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

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

When the testing is completed,

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

2. Open the door and block it open.

3. Discharge high voltage capacitor.

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

5. Reinstall the outer case (cabinet).

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

7. Run the oven and check all functions.

After repairing

1. Reconnect all leads removed from components during
testing.

2. Reinstall the outer case (cabinet).

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

4. Run the oven and check all functions.

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

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

1

R-1490
R-1491
R-1492

MICROWAVE MEASUREMENT PROCEDURE

A. Requirements:

1) Microwave leakage limit (Power density limit): The power density of microwave radiation emitted by a microwave oven
should not exceed 1mW/cm2 at any point 5cm or more from the external surface of the oven, measured prior to acquisition
by a purchaser, and thereafter (through the useful life of the oven), 5 mW/cm2 at any point 5cm or more from the external
surface of the oven.

2) Safety interlock switches Primary interlock relay and door sensing switch shall prevent microwave radiation emission in
excess of the requirement as above mentioned, secondary interlock switch shall prevent microwave radiation emission
in excess of 5 mW/cm2 at any point 5cm or more from the external surface of the oven.

B. Preparation for testing:
Before beginning the actual measurement of leakage, proceed as follows:

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

Survey instruments that comply with the requirement for instrumentation as prescribed by the performance standard for
microwave ovens, 21 CFR 1030.10(c)(3)(i), must be used for testing.

2) Place the oven tray in the oven cavity.

3) Place the load of 275±15 ml (9.8 oz) of tap water initially at 20±5˚C (68˚F) in the center of the oven cavity.
The water container shall be a low form of 600 ml (20 oz) beaker with an inside diameter of approx. 8.5 cm (3-1/2 in.)
and made of an electrically nonconductive material such as glass or plastic.
The placing of this standard load in the oven is important not only to protect the oven, but also to insure that any leakage
is measured accurately.

4) Set the cooking control on Full Power Cooking Mode

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

C. Leakage test:

Closed-door leakage test (microwave measurement)

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

2) Move the probe slowly, not faster than 1 in./sec. (2.5 cm/sec.) along the gap, watching for the maximum indication on
the meter.

3) Check for leakage at the door screen, sheet metal seams and other accessible positions where the continuity of the metal
has been breached (eg., around the switches, indicator, and vents).
While testing for leakage around the door pull the door away from the front of the oven as far as is permitted by the closed
latch assembly.

4) Measure carefully at the point of highest leakage and make sure that the highest leakage is no greater than 4mW/cm2,
and that the secondary interlock switch does turn the oven OFF before any door movement.

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

2

R-1490
R-1491
R-1492

SERVICE MANUAL

OVER THE RANGE MICROWAVE OVEN

R-1490/ R-1491/1492

FOREWORD

This Manual has been prepared to provide Sharp Electronics Corp. Service Personnel with Operation and Service Information
for the SHARP OVER THE RANGE MICROWAVE OVEN, R-1490/ R-1491/ R1492.

The models R-1490, R-1491 and R-1492 is quite similar to base models R-1480/81/82

(Refer No. is S3807R1480X//).

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

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

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 personnel.

DANGER

Certain initial parts are intentionally not grounded and present a risk of electrical shock only during servicing.
Service personnel - Do not contact the following parts while the appliance is energized;
High Voltage Capacitor, Power Transformer, Magnetron, High Voltage Rectifier Assembly, High Voltage
Harness;
If provided, Vent Hood, Fan assembly, Cooling Fan Motor.

All the parts marked “*” on parts list are used at voltages more than 250V.
Removal of the outer wrap gives access to voltage above 250V.
All the parts marked “∆” on parts list may cause undue microwave exposure, by themselves, or when they are damaged,

loosened or removed.

SHARP ELECTRONICS CORPORATION

SHARP PLAZA, MAHWAH,

NEW JERSEY 07430-2135

3

R-1490
R-1491
R-1492

PRODUCT SPECIFICATION

ITEM DESCRIPTION

Power Requirements 120 Volts / 14.3 Amperes

60 Hertz
Single phase, 3 wire grounded

Power Output 950 watts (IEC-705 TEST PROCEDURE)

Operating frequency of 2450MHz
Convection Power Output 1700 watts
Case Dimensions Width 29-15/16"

Height 16-3/8"

Depth 15- 1/4" (Not including the door handle)
Cooking Cavity Dimensions Width 20-1/4"

Height 8-3/16"

1.4 Cubic Feet Depth 14-1/2"
Hood lamp 2 bulbs, 30W x 2, Incandescent light bulbs
Hood fan Approx. 300 C.F.M.
Control Complement Touch Control System

Clock ( 1:00 - 12:59 )

Timer (0 - 99 min. 99 seconds)

Microwave Power for Variable Cooking

Repetition Rate;

P-HI..................................................Full power throughout the cooking time

P-90 .................................................................... approx. 90% of Full Power

P-80 .................................................................... approx. 80% of Full Power

P-70 .................................................................... approx. 70% of Full Power

P-60 .................................................................... approx. 60% of Full Power

P-50 .................................................................... approx. 50% of Full Power

P-40 .................................................................... approx. 40% of Full Power

P-30 .................................................................... approx. 30% of Full Power

P-20 .................................................................... approx. 20% of Full Power

P-10 .................................................................... approx. 10% of Full Power

P-0 .................................................... No power throughout the cooking time

CUSTOM HELP pad, COMPU DEFROST pad, COMPU COOK pad,

SENSOR COOKING pad, Number selection pads, POWER LEVEL pad

KITCHEN TIMER / CLOCK pad, MINUTE PLUS pad

TURNTABLE ON / OFF pad, STOP / CLEAR pad, START / TOUCH ON pad

WORK LIGHT pad, NIGHT LIGHT pad, FAN HI / LO pad

Oven Cavity Light 30W x 1 Incandescent light bulb
Safety Standard UL Listed FCC Authorized

DHHS Rules, CFR, Title 21, Chapter 1, Subchapter J
Weight Approx. 55 lbs.

GENERAL INFORMATION

GROUNDING INSTRUCTIONS

This oven is equipped with a three prong grounding plug. It must be plugged into a wall receptacle that is properly installed
and grounded in accordance with the National Electrical Code and local codes and ordinances.
In the event of an electrical short circuit, grounding reduces the risk of electric shock by providing an escape wire for the
electric current.

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

4

R-1490
R-1491
R-1492

Electrical Requirements
The oven is equipped with a 3-prong grounding plug. DO NOT UNDER ANY CIRCUMSTANCES CUT OR REMOVE THE
GROUNDING PIN FROM THE PLUG.
The power supply cord and plug must be connected to a separate 120 Volt AC, 60 Hz, 15 Amp. or more branch circuit, using
a grounded receptacle. The receptacle should be located inside the cabinet directly above the Microwave Oven/Hood
system mounting location.

3-Pronged Plug

Grounded
Receptacle Box

Grounding Pin

3-Pronged Receptacle

CONTROL PANEL

S e n s o r C o o k i n g

Popcorn Reheat

Baked
potato

Custom 

Help



Fresh

vegetables

Frozen
entrees

Frozen

vegetables





Ground

meat

Compu

Cook

Rice

Compu
Defrost

Fish/

seafood

12345
67890

Power

Level

Kitchen Timer

Clock

Minute

Plus

Turntable

On/Off

Work
Light

Stop

Clear

Night
Light

5

Start

Touch On

Fan

Hi/Lo

R-1490
R-1491
R-1492

OPERATION

DESCRIPTION OF OPERATING SEQUENCE

SENSOR COOKING CONDITION

Using the INSTANT SENSOR function, the foods are cooked
or defrosted without figuring time, power level or quantity.
When the oven senses enough steam from the food, it
relays the information to its microprocessor which will calcu­late the remaining cooking time and power level needed for
best results.
When the food is cooked, water vapor is developed. The
sensor “senses” the vapor and its resistance increases
gradually. When the resistance reaches the value set ac­cording to the menu, supplementary cooking is started.
The time of supplementary cooking is determined by experi­ment with each food category and inputted into the LSI.
An example of how sensor works (Baked potato):

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

MICROWAVE

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

STOP/CLEAR pad.

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

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

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

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

AH SENSOR

MICROWAVE

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

Cooking Sequence.

1. Touch one of the INSTANT SENSOR pads.

NOTE: The oven should not be operated on INSTANT

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

2. The coil of shut-off relays (RY1 and RY3) are energized,
the oven lamp, turntable motor and cooling fan motor are
turned on, but the power transformer is not turned on.

3. After about 32 seconds, the cook relay (RY2) is energized.
The power transformer is turned on, microwave energy
is produced and first stage is started.
The 32 seconds is the cooling time required to remove
any vapor from the oven cavity and sensor.

6

CAVITY 
THERMAL CUT-OUT

MAGNETRON 
TEMPERATURE FUSE

R-1490
R-1491
R-1492

SCHEMATIC

NOTE: CONDITION OF OVEN

1. DOOR CLOSED

2. CLOCK APPEARS ON DISPLAY

FUSE 
20A

120 V AC.
60 Hz

BLKWHT

GRN

GND

HOOD FAN
THERMAL
CUT OUT

B7

B5

B3
B1

HOOD
MOTOR

CAVITY 
THERMAL CUT-OUT

CONTROL UNIT

RY4

RY5

High

N.C.

Low

HOOD
CAPACITOR

A1 A3 B9 A7 A5 N.O.

HOOD
LAMP

SSR

RY3 RY1

TTM

HL HL

TURNTABLE

MOTOR

FAN

SECONDARY
INTERLOCK
SWITCH

Figure O-1. Oven Schematic-Off Condition

MAGNETRON 
TEMPERATURE FUSE

COM. N.O.

FM

MOTOR

PRIMARY

RY2

COM.

OL

OVEN LAMP

F1
F2

F3

INTERLOCK 

RELAY

E1

E2

STM

STIRRER

MOTOR

AH SENSOR

POWER
TRANSFORMER

DOOR
SENSING
SWITCH

HIGH VOLTAGE
CAPACITOR

0.94µF

HIGH VOLTAGE

MONITOR

SWITCH

RECTIFIER

SCHEMATIC

NOTE: CONDITION OF OVEN

1. DOOR CLOSED

2. COOKING TIME PROGRAMMED

3. VARIABLE COOKING CONTROL "HIGH"

4. "START" PAD TOUCHED

MAGNETRON

FUSE 
20A

120 V AC.
60 Hz

BLKWHT

GRN

GND

HOOD FAN
THERMAL
CUT OUT

CONTROL UNIT

B7

B5

B3
B1

HOOD
MOTOR

RY4

RY5

High

N.C.

Low

HOOD
CAPACITOR

A1 A3 B9 A7 A5 N.O.

HOOD
LAMP

SSR

HL HL

Figure O-2. Oven Schematic-Cooking Condition

RY3 RY1

TTM

TURNTABLE

MOTOR

FAN

MOTOR

SECONDARY
INTERLOCK
SWITCH

COM. N.O.

OVEN LAMP

FM

COM.

OL

PRIMARY

INTERLOCK 

RELAY

RY2

STM

STIRRER

MOTOR

F1
F2

F3

E1

E2

AH SENSOR

DOOR
SENSING
SWITCH

MONITOR

SWITCH

POWER
TRANSFORMER

HIGH VOLTAGE
CAPACITOR

0.94µF

HIGH VOLTAGE
RECTIFIER

MAGNETRON

7

R-1490
R-1491
R-1492

TROUBLESHOOTING GUIDE

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

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

IMPORTANT: If the oven becomes inoperative because of a blown monitor fuse, check the monitor switch, relay (RY1)

primary interlock relay (RY2), door sensing switch and secondary interlock switch before replacing the
monitor fuse. If monitor fuse is replaced, the monitor switch must also be replaced. Use part FFS-BA016/
KiT as an assembly.

IMPORTANT: Whenever troubleshooting is performed with the power supply cord disconnected. It may in, some cases,

be necessary to connect the power supply cord after the outer case has been removed, in this event,

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

2. Open the door and block it open.

3. Discharge high voltage capacitor.

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

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

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

When the testing is completed

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

2. Open the door and block it open.

3. Discharge high voltage capacitor.

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

5. Reinstall the outer case (cabinet).

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

7. Run the oven and check all functions.

TEST PROCEDURE

CONDITION

SENSOR
COOKING
CONDITION

POSSIBLE CAUSE

DEFECTIVE PARTS

PROBLEM

The oven stops and "ERROR" is displayed or does not end during Sensor Cooking
condition. (Oven does not shut off after a cup of water is boiling by Sensor Cooking.)

Oven stops at 32 seconds after starting.

AND

LQCK

CONTROL UNIT

AH SENSOR

SHORTED OR OPENED WIRING

NOTE: For additional troubleshooting procedures, please refer back to the R-1480 base model Service Manual.

8

TEST PROCEDURES

R-1490
R-1491
R-1492

PROCEDURE

LETTER

M KEY UNIT TEST

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

2. Open the door and block it open.

3. Discharge high voltage capacitor.

4. If the display fails to clear when the STOP/CLEAR pad is depressed, first verify the flat ribbon cable

5. Reconnect all leads removed from components during testing.

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

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

8. Run the oven and check all functions.

COMPONENT TEST

is making good contact, verify that the door sensing switch (stop switch) operates properly; that is the
contacts are closed when the door is closed and open when the door is open. If the door sensing
switch (stop switch) is good, disconnect the flat ribbon cable that connects the key unit to the control
unit and make sure the door sensing switch is closed (either close the door or short the door sensing
switch connecter). Use the Key unit matrix indicated on the control panel schematic and place a
jumper wire between the pins that correspond to the STOP/CLEAR pad making momentary contact.
If the control unit responds by clearing with a beep the key unit is faulty and must be replaced. If the
control unit does not respond, it is faulty and must be replaced. If a specific pad does not respond,
the above method may be used (after clearing the control unit) to determine if the control unit or key
pad is at fault.



G 1 G 2 G 3 G 4 G 5 G 6 G 7 G 8

Q AH SENSOR TEST

Checking the initial sensor cooking condition
WARNING : The oven should be fully assembled before following procedure.

(1) The oven should be plugged in at least two minutes before sensor cooking.
(2) Room temperature should not exceed 95˚F (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” of the operation manual.

(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 vapour given of by the spray and turn off before food is properly cooked.

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

Water load cooking test
WARNING : The oven should be fully assembled before following procedure.

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

G 9G10G11G12

Custom

Help

Baked

Potato

Reheat

Fresh

vegetables

Compu

Cook

Frozen
entrees

Fozen

vegetables

Ground

meat

RicePopcorn

Compu
Defrost

Fish /

seafood

17

Power

Level

Kitchen

Timer
Clock

Minute

Plus

8
9

0

26

Turn

3
4

5

Table

On / Off

Stop

Clear

Start

Touch On

Hi / Lo

Work
Light

Night
Light

Fan

9

R-1490
R-1491
R-1492

TEST PROCEDURES

PROCEDURE

LETTER

COMPONENT TEST

(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 pad once and touch the Start pad, Now, the oven is in the sensor cooking condition

and “REHEAT” "SENSOR" and "COOK" will appear in the display.
(5) The oven will operate for the first 16 seconds, without generating microwave energy.
NOTE: ERROR will appear if the door is opened or STOP/CLEAR pad is touched during first stage of

sensor cooking.

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

down the remaining cooking time and oven should turn off after water is boiling (bubbling).
If the oven does not turn off, replace the AH sensor or check the control unit, refer to explanation below.

TESTING METHOD FOR AH SENSOR AND/OR CONTROL UNIT

To determine if the sensor is defective, the simplest method is to replace it with a new replacement
sensor.
(1) Disconnect the power supply cord, and then remove outer case.
(2) Open the door and block it open.
(3) Discharge high voltage capacitor.
(4) Remove the AH sensor.
(5) Install the new AH sensor.
(6) Reconnect all leads removed from components during replacing.
(7) Re-install the outer case (cabinet).
(8) Reconnect the power supply cord after the outer case is installed.
(9) Reconnect the oven to the power supply cord and check the sensor cook operation proceed as
follows:

9-1. Fill approximately 200 milliliters (7.2 oz) of tap water in a 1000 milliliter measuring cup.
9-2. Place the container on the center of tray in the oven cavity.
9-3. Close the door.
9-4. Touch reheat pad once and touch the Start pad.
9-5. The control panel is in automatic Sensor operation.
9-6. The display will start to count down the remaining cooking time, and the oven will turn off

automatically after the water is boiling (bubbling).
If new sensor dose not operate properly, the problem is with the control unit, and refer to explanation
below.

CHECKING CONTROL UNIT

(1) Disconnect the power supply cord, and then remove outer case.
(2) Open the door and block it open.
(3) Discharge high voltage capacitor.
(4) Disconnect the sensor connector that is mounted to control panel.
(5) Then connect the dummy resistor circuit (see fig.) to the sensor connector of control panel.
(6) Disconnect the leads to the primary of the power transformer.
(7) Ensure that these leads remain isolated from other components and oven chassis by using

insulation tape.
(8) After that procedure, re-connect the supply.
(9) Check the sensor cook operation proceed as follows:

9-1. Touch reheat pad once and touch the Start pad.

9-2. The control panel is in the sensor cooking operation.

9-3. After approximately 32 seconds, push plunger of select switch for more than 3 seconds. This

condition is same as judgement by AH sensor.

9-4. After approximately 3 seconds, the display shows “ X X . X X “ which is the remaining cooking

time, and the display count down.
If the above is not the case, the control unit is probably defective.
If the above is proper, the AH sensor is probably defective.

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

10

TEST PROCEDURES

R-1490
R-1491
R-1492

PROCEDURE

LETTER

COMPONENT TEST

(11) Open the door and block it open.
(12) Discharge high voltage capacitor.
(13) Disconnect the dummy resistor circuit from the sensor connector of control panel.
(14) Carry out necessary repair.
(15) Reconnect all leads removed from components during testing and repairing.
(16) Re-install the outer case (cabinet).
(17)

Reconnect the power supply cord after the outer case is installed. Run the oven and check all
functions.
(18) Carry out “Water load cooking test” again and ensure that the oven works properly.

Plunger

NC
NO

COM

NO

NC

F-1
F-2

F-3

To connector (F)
on Control Unit.

1
2
3

CONNECTOR

R1, R2 : 22Ω ± 1% 1/2W

R3 : 4.3kΩ ± 5% 1/4W
R4 : 1MΩ ± 5% 1/4W

R1

R3 R4

R2

COM

Sensor Dummy Resistor Circuit

TOUCH CONTROL PANEL ASSEMBLY

OUTLINE OF TOUCH CONTROL PANEL

1) LSI

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

DESCRIPTION OF LSI

LSI(IZA877DR)

The I/O signals of the LSI(IZA877DR) are detailed in the following table.

Pin No. Signal I/O Description

NOTE: For additional informations of LSI, please refer back to the R-1480 base

model Service Manual.

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 converter
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.

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

11

R-1490
R-1491
R-1492

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.

ventilation opening for sensing

Sensing part
(Open vessel)

Thermistors

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.

Absolute humidity vs,

R1

R2

Operational
amplifier

+

­S : Thermistor

open vessel

C : Thermistor
closed vessel

Output
voltage

Output voltage

C

S

R3

output voltage characterist

Absolute humidity (g/m )

2

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.
After 16 seconds of operation in the sensor cook mode,
the LSI detects the initial voltage at AN6. If the absolute
humidity sensor is open or shorted, the circuit can not be
balanced for initial voltage comparisons. This will result
in the word "error" on the display and the cooking
operation is stopped.

1) Absolute humidity sensor circuit



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

11

F-1
C

F-3

3.57k

S

F-2

10

VA : -15V

3.32k

IC2(IZA495DR)

620k

300k

150k

75k

37.4k

47k

0.1

uF

1.8k

9

VA : -15V

4
5
6
7
8

325

0.01uF

0.015uF

0.01uF

+

IC2

10k

-

360k

12

47k

D101

1

VC : -5V

SW1

64

P30

SW2

63

P31

SW3

62

P32

SW4

61

P33

SW5

60

P34

AN7

LSI
(IC1)

6

AN6

(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, a 16 seconds clearing cycle
occurs. Then 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,

12

R-1490
R-1491
R-1492

COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE

WARNING AGAINST HIGH VOLTAGE:

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

WARNING:

1. Disconnect the power supply cord.

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

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

1. Door does not close firmly.

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

3. The door gasket or seal is damaged.

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

WARNING FOR WIRING

To prevent an electric shock, take the following pre­cautions.

1. Before wiring,

1) Disconnect the power supply cord.

2) Open the door block it open.

3) Discharge the high voltage capacitor and wait for 60
seconds.

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

1) High voltage parts:
Magnetron, High voltage transformer, High voltage
capacitor and High voltage rectifier assembly.

2) Hot parts:
Oven lamp, Magnetron, High voltage transformer
and Oven cavity.

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.

3) Sharp edge:

Bottom plate, Oven cavity, Waveguide flange,
Chassis support and other metallic plate.

4) Movable parts (to prevent a fault)

Fan blade, Fan motor, Switch, Switch lever, Open
button.

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

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

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

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

HOOD FAN MOTOR, HOOD DUCT, OVEN LAMP SOCKET AND AH. SENSOR REMOVAL

1. Disconnect the power supply cord and remove the oven
from wall and remove outer case. (Refer to procedure of
"Removal of Oven from Wall" and "Outer case Removal")

2. Open the door and block it open.

3. Discharge high voltage capacitor.

4.

Disconnect the 6-pin connector of the hood fan motor
from the main wire harness located at the right edge of the
hood duct and release the snap band from the hood duct.

5. Remove the hood fan motor from the hood duct by lifting
it up.

6. Now, the hood fan motor is free.

7. Disconnect the connector CN-F from the control unit.

8. Remove one (1) screw holding the hood duct to the oven
cavity front plate.

9. Release the 6-pin connector and the 3-pin connector of
the main harness A from the hood duct.

10.Disconnect the wire leads from the fan motor and chassis
support, and release the wire leads from holes of the
hood duct.

11.Remove the two (2) unit mounting screws from the
chassis support (right side) and the hood duct (left side).

12.Remove the one (1) screw holding the chassis support.

13.Remove the chassis support.

14.Remove the hood duct from the oven cavity by lifting it up.

13

R-1490
R-1491
R-1492

15.Screw the oven lamp off from the lamp socket.

16.Remove the lamp socket from the lamp angle.

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

18.Now, the oven lamp socket is free.

19.Release the harness of the AH sensor assembly from
three (3) wire holders of the hood duct.

20.Remove two (2) screws holding the AH sensor assembly
to the hood duct.

21.Now, the AH sensor assembly is free.

Oven lamp
socket

Terminal

Wire lead

Terminal hole

Flate type small
screw driver

14

R-1490
R-1491
R-1492

1

A

Power Supply

cord 120V 60Hz

BLK

GRN

B

3

BLK

WHT
2

WHT

1

GRN

C

HOOD FAN MOTOR

BLK

YLW

YLW

WHT

345

WHT

2

BLK

BLU
1

BLU

RED

6

D

RED

ORG

Blue 

RED

WHT

Marking

BLK RED

2

REDRED

OVEN LAMP & SOCKET

RED

WHT

STIRRER MOTOR

CAVITY

THERMAL

CUT-OUT

3

HIGH VOLTAGE

CAPACITOR

MAGNETRON

TEMPERATURE 

FUSE

MAGNETRON

HIGH VOLTAGE COMPONENTS

45

RED

RED

ORG

WHT

HOOD LAMPS

& SOCKETS

GRY

WHT

HOOD FAN

ORG

ORG

WHT

HIGH VOLTAGE

WIRE A

RED

WHT

WHT

FAN

MOTOR

HIGH

VOLTAGE

RECTIFIER

RED

POWER 

TRANSFORMER

W
W

T

H

T

H

6

THERMAL

CUT-OUT

ORG

Blue Marking

BLK

A

B

C

D

E

GRN

F

GRN

GRN

CN-E

GRN

2

G

AH SENSOR

to Chassis Support

RED

1

RED

GRN

N.O.

COM.

DOOR SENSING SWITCH

CN-B

BLU

ORG

9

WHT

WHT

8

G

WHT

R

RED

TURNTABLE

MOTOR

Y

E

WHT

WHT

GRY

ORG

34567

BLK

GRY

WHT

RED

ORG

RED

WHT

N.C.

BLK

BLK

COM.

RED

MONITOR

SWITCH

ORG

ORG

N.O.

COM.

SECONDARY

INTERLOCK

SWITCH

BLK

RED

WHT

CN-A

2

1

BLK

FUSE & HOLDER

BLK

WHT

7

345

6

YLW

RED

2

1

Figure S-1. Pictorial Diagram

F

G

RY1

N.O.

RY1

COM.

RY2

N.O.

RY2

COM.

C100

1

T1

357

CN-A

to Right Base Plate

BLK

RED

WHT3

CN-F

1

2

H

1

IC1

IC2

CN-G

CN-E

1

1

2

CN-F

2

RY5

N.O.

RY1RY2

N.O.

1

COM.

CN-E

31

12

PRIMARY

INTERLOCK

RY2:

CN-B

9

RELAY

RY4

3

15

COM.

45

H

6

R-1490
R-1491
R-1492

1

A

B

: IF NOT SPECIFIED 1/8w ± 5%

: IF NOT SPECIFIED 1SS270A

: IF NOT SPECIFIED 0.01µF/16v

C

Note

D

C10 0.1µ/50v

VP



2

OFF HELP

TURNTABLE

Fluorescent display tube

9 P6
8 P5
7 P4
6 P3
5 P2

MIX CONV COOK LBS KG

4 P1

VF2

VF1

1. 2 F

33. 32 F

VP

330 1w
R100



IC2

(IZA495DR)

R10 3.3 1/2w

112

29 8G
28 7G
27 6G
26 5G
25 4G
24 3G
23 2G
22 1G

12 P9
11 P8
10 P7

3

20 P15
19 P14

17 P13
16 P12
15 P11

13 P10

R93 100k

R92 100k

R91 100k

(A)
(B)(C)

P30

P31

P32

P33

P34

P35

P36

P37

60

64

1

AN7

AN6

AN5

AN4

VEE

VCC

VREF

AVSS

P00

AN3

P01

10

AN2

AN1

Start

Touch On

05

Plus

Minute

Fish/

seafood

Frozen

vegetables

Reheat

G12 G11 G10 G 9

C71 330pF

C70 330pF

6

A

B

C

D

45

R83 3.3k

D77

Light

Night



Turn

table

On / Off

83

Level

Power

RicePopcorn

Cook

Compu

C73 330pF

C72 330pF

Fan

Hi / Lo

Stop

Clear

94

Clock

Timer

Kitchen

Compu

Defrost

Frozen

entrees

Baked

Potato

Light

R82 3.3k

Work

D76

6

R81 3.3k

D752

R80 3.3k

D74

R79 3.3k

D73

172

R78 3.3k

D72

meat

R77 3.3k

R76 3.3k

P02

P03

P04

P05

P06

P07

P10

P11

P12

P13

P14

P15

P16

P17

P20

P21

P22

P23

P24

P25

P26

AN0

20

P47

P46

IZA877DR
IC1

P45

P44

P43

P42

40

INT1

50

P55

P54

P53

P52

P51

P50

P40

P71

RESET

P27

30

32 33

XIN

P70

VSS

XOUT

Ground

D71

Fresh

G 1 G 2 G 3 G 4 G 5 G 6 G 7 G 8

R73 3.3k

R72 3.3k

R71 3.3k

R70 3.3k

vegetables

Help

Custom

D70

Q4

DTA123ES

E

–

+

C5

–

+

ZD2 HZ16-1

F

R1 4.3k 1/2w

–

+

D4

G

T1

D1

3

5

6

2

1

10G471K

ab

d

VRS1

A 7

H

C7

HZ4A2
ZD4

C6 10µ/35v

ZD3 HZ5C2

C4 10µ/35v

C3 0.1µ/50v



C2 1000µ/35v

C1 0.1µ/50v

D3

D2

4

D1-D4

11ES1

(J1)

4.7k
R7

R2 1.5k 1/4w

ZD1 HZ6A3

c

A 1

VC

R4 510 1/2w

Q1

2SB1238

C100

7µ/230v

C8

4.7k
R8

R3 680 1w

Q20

KRA101M

CST4.00MGW

C30

Q28

KRA101M

COM

(C)

(B)

(A)

R30 15k

R31 4.7k

AH SENSOR

E

D31

DOOR

SWITCH

E 1 E 2 F 1 F 2 F 3

Figure S-2. Control Panel Circuit

F

D30

G

H

Q27

KRC243M

N.O.

CF1

RY2

N.O.

(J15)

(J7)

KRA101M



2

SSR1

11

C110 0.033µ/250v

R110 47 1/2w

B 9

R20

(J5)
(J3)
(J6)
(J4)
(J2)

1k 1/2w

C110

Q25

KRA101M

3

13

S101D01

R110

C21 0.1µ/50v

–

+

Q30

KRA101M

C20 10µ/35v

+

–

Q26

KRA101M

D25D26D27D28

RY4

RY5

NO NC

B 7

B 5

B 3

B 1

HIGHLOW

RY1

COM



Q3

KRA101M

/50v

0.1µ
C9

Q40

KRA101M

R40 3.3k

SP40

Q24

D20

RY3

A 3

A 5

MOTOR RUN

CAPACITOR

1

TURNTABLE

MOTOR

2

HOOD LAMP

COM

HOOD THERMO

3

16

HOOD MOTORCOM(H)

FAN MOTOR

OVEN LAMP

STIRRER MOTOR

MICRO

45

6

PARTS LIST

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

The parts marked “*” are used in voltage more than 250V. "§" MARK: PARTS DELIVERY SECTION

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

ELECTRIC PARTS

1- 1 FH-DZB012MRY0 M High voltage rectifier assembly 1 AK

*

1- 2 RC-QZA173WRE0 M High voltage capacitor 1 AR

*

1- 3 QFS-TA013WRE0 M Temperature fuse 150˚C (Magnetron) 1 AG
1- 4 RMOTDA182WRE0 M Turntable motor 1 AQ
1- 5 RMOTDA214WRE0 M Stirrer motor 1 AQ
1- 6 RTHM-B005MRE0 M Thermal cut-out N.O. 60˚C (Hood Fan) 1 AG
1- 7 RTRN-B055MRE0 M Power transformer 1 BE

*

∆

1- 8 RV-MZA280WRE0 M Magnetron 1 BD

*

1- 9 QFSHDB003MRE0 M Fuse holder 1 AD
1-10 QSW-MA110WRE0 M Secondary interlock and door sensing switches 2 AE
1-11 FFS-BA016/KIT M Monitor switch with fuse assembly 1 AF
1-12 FACCDB011MRE0 M Power supply cord 1 AP
1-13 QSOCLB006MRE0 M Oven lamp socket 3 AE
1-14 FMOTEA366WRK0 M Hood fan motor 1 BE
1-15 RMOTEA346WRE0 M Fan motor 1 AR
1-16 RLMPTA071WRE0 M Oven lamp 3 AG
1-17 RTHM-A080WRE0 M Thermal cut-out 145˚C (Cavity) 1 AG
1-18 FDTCTA191WRK0 M AH sensor 1 AQ

CABINET PARTS

2- 1 LSTY-B021MRP0 M Rear stay 1 AF
2- 2 PDIF-B018MRF0 M Hood exhaust louver [R-1490] 1 AT
2- 2 PDIF-B019MRF0 M Hood exhaust louver [R-1491] 1 AT
2- 2 PDIF-B020MRF0 M Hood exhaust louver [R-1492] 1 AT
2- 3 GDAI-B045MRP0 M Right base plate 1 AM
2- 4 PCUSUB040MRP0 M Base cover cushion 1 AA
2- 5 GCABUB084MRP0 M Outer case cabinet [R-1490] 1 BA
2- 5 GCABUB085MRP0 M Outer case cabinet [R-1491] 1 BB
2- 5 GCABUB086MRP0 M Outer case cabinet [R-1492] 1 BC
2- 6 TMAPCB052MRR0 M Schematic diagram 1 AB
2- 7 FANGKB009MRY0 M Hood lamp glass assembly [R-1490] 1 AN
2- 7 FANGKB010MRY0 M Hood lamp glass assembly [R-1491] 1 AM
2- 7 FANGKB011MRY0 M Hood lamp glass assembly [R-1492] 1 AM
2-7-1 LANGQB016MRP0 M Hood lamp glass angle [R-1490] 1 AG
2-7-1 LANGQB020MRP0 M Hood lamp glass angle [R-1491] 1 AG
2-7-1 LANGQB027MRP0 M Hood lamp glass angle [R-1492] 1 AG
2-7-2 PGLSPB004MRE0 M Hood lamp glass 1 AH
2- 8 PCOVPB064MRt0 M Base cover [R-1490] 1 AY
2- 8 PCOVPB066MRt0 M Base cover [R-1491] 1 AY
2- 8 PCOVPB067MRt0 M Base cover [R-1492] 1 AY

CONTROL PANEL PARTS

3- 1 DPWBFB083MRU0 M Control unit 1 BL
3- 1A QCNCMA447DRE0 M 4-pin connector CN-A 1 AA
3- 1B QCNCMA448DRE0 M 5-pin connector CN-B 1 AA
3- 1C QCNCMA275DRE0 J 2-pin connector CN-E 1 AB
3- 1D QCNCMA237DRE0 J 3-pin connector CN-F 1 AD
3- 1E QCNCWA030DRE0 J 12-pin connector CN-G 1 AE
3- 1F RV-KXB004MRE0 M Fluorescent display tube 1 AS
3- 1G PTPEHB010MRE0 M Tape 2mm 1 AB
C1 RC-KZA087DRE0 J Capacitor 0.1 uF 50V 1 AB
C2 VCEAB31VW108M J Capacitor 1000 uF 35V 1 AF
C3 RC-KZA087DRE0 J Capacitor 0.1 uF 50V 1 AB
C4 VCEAB31VW106M J Capacitor 10 uF 35V 1 AB
C5 VCKYD11CY103N J Capacitor 0.01 uF 16V 1 AH
C6 VCEAB31VW106M J Capacitor 10 uF 35V 1 AB
C7-8 VCKYD11CY103N J Capacitor 0.01 uF 16V 2 AH
C9-10 RC-KZA087DRE0 J Capacitor 0.1 uF 50V 2 AB
C20 VCEAB31VW106M J Capacitor 10 uF 35V 1 AB
C21 VCEAB31HW104M J Capacitor 0.1 uF 50V 1 AM
C30 VCKYD11CY103N J Capacitor 0.01 uF 16V 1 AH
C70-73 VCKYD11HB331K J Capacitor 330 pF 50V 4 AA
C100 RC-QZB014MRE0 M Capacitor 7 uF 230V 1 AK
C110 RC-QZB019MRE0 M Capacitor 0.033 uF 250V 1 AC
CF1 RCRS-A010DRE0 J Ceramic resonator (CST4.00MGW) 1 AD
D1-4 VHD11ES1///-1 J Diode (11ES1) 4 AB

R-1490
R-1491
R-1492

17

R-1490
R-1491
R-1492

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

D20 VHD1SS270A/-1 J Diode (1SS270A) 1 AA
D25-28 VHD1SS270A/-1 J Diode (1SS270A) 4 AA
D30-31 VHD1SS270A/-1 J Diode (1SS270A) 2 AA
D70-77 VHD1SS270A/-1 J Diode (1SS270A) 8 AA
IC1 RH-IZA877DRE0 J LSI 1 AP
IC2 RH-IZA495DRE0 J IC 1AL
Q1 VS2SB1238//-3 J Transistor (2SB1238) 1 AA
Q3 VSKRA101M//-3 J Transistor (KRA101M) 1 AB
Q4 VSDTA123ES/-3 J Transistor (DTA123ES) 1 AA
Q20 VSKRA101M//-3 J Transistor (KRA101M) 1 AB
Q24-26 VSKRA101M//-3 J Transistor (KRA101M) 3 AB
Q27 VSKRC243M//-3 J Transistor (KRC243M) 1 AB
Q28 VSKRA101M//-3 J Transistor (KRA101M) 1 AB
Q30 VSKRA101M//-3 J Transistor (KRA101M) 1 AB
R1 VRD-B12HF432J J Resistor 4.3k ohm 1/2W 1 AH
R2 VRD-B12EF152J J Resistor 1.5k ohm 1/4W 1 AA
R3 VRS-B13AA681J J Resistor 680 ohm 1W 1 AA
R4 VRD-B12HF511J J Resistor 510 ohm 1/2W 1 AB
R7-8 VRD-B12EF472J J Resistor 4.7k ohm 1/4W 2 AA
R10 VRD-B12HF3R3J J Resistor 3.3 ohm 1/2W 1 AH
R20 VRD-B12HF102J J Resistor 1k ohm 1/2W 1 AA
R30 VRD-B12EF153J J Resistor 15k ohm 1/4W 1 AA
R31 VRD-B12EF472J J Resistor 4.7k ohm 1/4W 1 AA
R40 VRD-B12EF332J J Resistor 3.3k ohm 1/4W 1 AA
R70-73 VRD-B12EF332J J Resistor 3.3k ohm 1/4W 4 AA
R76-83 VRD-B12EF332J J Resistor 3.3k ohm 1/4W 8 AA
R91-93 VRD-B12EF104J J Resistor 100k ohm 1/4W 3 AA
R100 VRS-B13AA331J J Resistor 330 ohm 1W 1 AA
R110 VRS-A12HA470J J Resistor 47 ohm 1/2W 1 AH
RY1-2 RRLY-A113DRE0 M Relay (DU24D1-1PR(M)) 2 AG
RY3-4 RRLY-A080DRE0 J Relay (OJ-SH-124LM) 2 AG
RY5 RRLY-A112DRE0 M Relay (VE24HSE-K) 1 AH
SSR1 RH-SZA009DRE0 M Solid state relay 1 AG
SP40 RALM-A014DRE0 J Buzzer (PKM22EPT) 1 AG
T1 RTRNPB014MRE0 M Transformer 1 AM
VRS1 RH-VZA032DRE0 J Varistor (10G471K) 1 AE
ZD1 VHEHZ6A3///-1 J Zener diode (HZ6A-3) 1 AC
ZD2 VHEHZ161///-1 J Zener diode (HZ16-1) 1 AA
ZD3 VHEHZ5C2///-1 J Zener diode (HZ5C-2) 1 AA
ZD4 VHEHZ4A2///-1 J Zener diode (HZ4A-2) 1 AA
3- 2 FPNLCB213MRK0 M Control panel sub. assembly [R-1490] 1 AZ
3- 2 FPNLCB214MRK0 M Control panel sub, assembly [R-1491] 1 AZ
3- 2 FPNLCB215MRK0 M Control panel sub, assembly [R-1492] 1 AZ
3- 2-1 FUNTKB161MRE0 M Key unit [R-1490] 1 AU
3- 2-1 FUNTKB162MRE0 M Key unit [R-1491] 1 AU
3- 2-1 FUNTKB163MRE0 M Key unit [R-1492] 1 AU
3- 2-2 GMADIB030MRF0 M Display window 1 AF
3- 3 XEPSD30P10XS0 M Screw; 3mm x 10mm 5 AB

OVEN PARTS

4- 1 FFTA-B003MRK0 M Exhaust damper assembly 1 AH
4- 2 FROLPB024MRK0 M Turntable support assembly 1 AK
4- 3 NTNT-A090WRE0 M Turntable tray 1 AN
4- 4 LANGKB010MRP0 M Capacitor holder 1 BB
4- 5 FCOVPB012MRY0 M Stirrer cover assembly 1 AK
4- 6 FFAN-B006MRK0 M Stirrer fan assembly 1 AL
4- 7 ************* M Oven cavity (Not replaceable part) 1 --

∆

4- 8 PPACGB014MRF0 M Turntable motor packing 1 AA
4- 9 PHOK-B017MRF0 M Latch hook 1 AG

∆

4-10 LANGTB036MRP0 M Unit mounting plate 1 AP
4-11 NFANPB001MRE0 M Fan blade 1 AC
4-12 LBSHC0037WRE0 M Cord bushing 1 AB
4-13 PCOVPB065MRP0 M Oven lamp cover 1 AD
4-14 PDUC-B077MRP0 M Hood intake duct 1 AG
4-15 PCUSUB039MRP0 M Hood intake duct cushion 2 AA
4-16 PFILWB005MRP0 M Lamp filter 1 AB
4-17 PSKR-B012MRP0 M Magnetron air guide 1 AB
4-18 LANGTB040MRP0 M Chassis support 2 AE
4-19 PDUC-B078MRF0 M Hood duct 1 AX
4-20 PCUSUB043MRP0 M Hood duct cushion 1 AB
4-21 LSTPPB031MRF0 M Door stopper 1 AC
4-22 PCUSUB045MRP0 M Cushion 1 AE
4-23 PCUSUB044MRP0 M Sensor cushion 3 AB

18

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

4-24 PCUSUB034MRP0 M Cab. cushion 1 AB

DOOR PARTS

5 CDORFB203MRK0 M Door assembly [R-1490] 1 BD

∆

5 CDORFB205MRK0 M Door assembly [R-1491] 1 BE

∆

5 CDORFB206MRK0 M Door assembly [R-1492] 1 BE

∆

5- 1 FDORFB060MRT0 M Door panel assembly 1 AX

∆

5- 2 FCOV-B125MRK0 M Door frame assembly [R-1490] 1 AS

∆

5- 2 FCOV-B127MRK0 M Door frame assembly [R-1491] 1 AS

∆

5- 2 FCOV-B128MRK0 M Door frame assembly [R-1492] 1 AS

∆

5-2-1 PGLSPB012MRE0 M Front door glass [R-1490] 1 AQ
5-2-1 PGLSPB014MRR0 M Front door glass [R-1491] 1 AQ
5-2-1 PGLSPB013MRR0 M Front door glass [R-1492] 1 AQ
5-2-2 LSTPPB030MRF0 M Latch head 1 AC

∆

5-2-3 LSTPPB032MRF0 M Glass stopper 1 AC
5-2-4 MSPRTA046WRE0 M Latch spring 1 AB
5- 3 GCOVHB035MRF0 M Choke cover 1 AG
5- 4 PSHEPB024MRE0 M Sealer film 1 AF
5- 5 JHNDPB007MRF0 M Door handle [R-1490] 1 AK
5- 5 JHNDPB008MRF0 M Door handle [R-1491] 1 AK
5- 5 JHNDPB009MRF0 M Door handle [R-1492] 1 AK
5- 6 XCPSD40P08000 M Screw : 4mm x 8mm 6 AA

MISCELLANEOUS

6- 1 CFZK-B131MRK0 M Installation material assembly 1 AM
6-1-1 LBSHC0040MRE0 M Grommet 1 AC
6-1-2 LX-BZ0195WRE0 M Toggle screw 4 AC
6-1-3 LX-MZ0001WRE0 M Cord holder 1 AC
6-1-4 XBRSD50P60000 M Screw : 5mm x 60mm 2 AC
6-1-5 XOTSD40P12000 M Screw : 4mm x 12mm 1 AA
6-1-6 XTSSD50P35000 M Screw : 5mm x 35mm 6 AA
6-1-7 XWHSD50-16300 M Washer 2 AA
6- 2 TINSEB177MRR0 M Installation instruction 1 AB
6- 3 TINSEB181MRR0 M Operation manual 1 AD
6- 4 TINSKB047MRR0 M Top template 1 AC
6- 5 TINSKB048MRR0 M Wall template 1 AB
6- 6 QW-QZB023MRE0 M High voltage wire A 1 AD

*

6- 7 FW-VZB145MRE0 M Main harness A 1 AU
6- 8 TCAUAA025WRR0 M Caution label 1 AA
6- 9 TCAUAB015MRR0 M Monitor caution label 1 AA
6-10 TCAUAB005MRR0 M DHHS caution label 1 AB
6-11 FW-VZB149MRE0 M Stop switch harness 1 AM
6-12 PFIL-B004MRE0 M Chacoal filter 1 AH
6-13 PFIL-B002MRE0 M Grease filter 1 AF
6-14 PCLIC0020MRE0 M Canoe clip 1 AA
6-15 TLAB-B033MRR0 M Menu label 1 AB
6-16 QW-QZB008MRE0 M Sensor grounding wire 1 AC

SCREWS,NUTS AND WASHERS

7- 1 XCPSD40P08000 M Screw : 4mm x 8mm 3 AA
7- 2 XOTSF40P12000 M Screw : 4mm x 12mm [R-1490] 4 AB
7- 2 XOTSE40P12000 M Screw : 4mm x 12mm [R-1491] 4 AA
7- 2 XOTSD40P12000 M Screw : 4mm x 12mm [R-1492] 4 AA
7- 3 XOTSD40P12000 M Screw : 4mm x 12mm 24 AA
7- 4 XBTSD40P08000 M Screw : 4mm x 8mm 2 AA
7- 5 LX-CZA038WRE0 M Special screw 4 AA
7- 6 LX-CZ0052WRE0 M Special screw 2 AA
7- 7 LX-BZ0081YBE0 M Screw : 4mm x 8mm 5 AA
7- 8 XCPSD30P08000 M Screw : 4mm x 8mm 4 AA
7- 9 LX-BZB012MRE0 M Unit mounting screw 2 AD
7-10 XCBSD30P08000 M Screw : 4mm x 8mm 4 AA

R-1490
R-1491
R-1492

HOW TO ORDER REPLACEMENT PARTS

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

1. MODEL NUMBER 2. REF. NO. 3. PART NO. 4. DESCRIPTION

Order Parts from the authorized SHARP parts Distributor for your area.
Defective parts requiring return should be returned as indicated in the Service Policy.

19

R-1490
R-1491
R-1492

1

OVEN AND CABINET PARTS

A

B

C

D

7-10

6-16

1-3

4-23

2

4-13

1-18

4-19

4-11

1-15

7-3

4-18

6-16

7-3

3

1-14

7-4

7-1 1-16

1-17

7-3

1-5

2-5

45

7-3

4-1

7-3

2-1

7-5

7-3

4-12

4-24

1-12

2-6

1-13

7-8

1-3

6-10

7-3

6

A

4-10

B

7-5

C

D

E

4-6

F

G

H

1

7-9

6-12

4-5

4-7

2-2

6-14

4-3

4-2

1-16

2

6-13

1-13

4-16

7-9

4-8

6-8

1-4

7-8

2-8

2-7-2

2-7

7-2

3

4-20

1-8

6-9

7-6

4-9

1-10

1-9

6-8

7-8

4-22

7-8

1-7

4-17

7-3

7-7

1-10

4-4

7-1

1-11

1-2

4-15

1-1

1-6

7-3

2-4

2-3

7-3

6-13

7-2

2-7-1

45

4-18

7-3

4-14

4-15

6

E

F

G

H

20

R-1490
R-1491
R-1492

1

CONTROL PANEL PARTS

A

7 - 3

B

C

5-2-1

2

3 - 2

3-2-2

3-2-1



3

3-1E
3 - 1

3 - 3

5-6

5-1

45

3 - 3

3 - 3

DOOR PARTS

5

4-21

5-4

5-6

5-3

6

A

B

C

D

E

5-2

5-5

F

G

6-7

5-2-4

5-2-2

5-2-3

6-6

5-6

6-1-1

6-1-2

6-1-3

D

E

MISCELLANEOUS

6-1

F

6-1-4

6-1-5

6-1-6

6-1-7

G

H

1

2

6-11

3

21

45

H

6

R-1490
R-1491
R-1492

1

PACKING AND ACCESSORIES

A

2

3

DOOR PROTECTOR

SPADP0221MRE0

45

6

A

TOP PAD
SPADBB026MRE0

B

6-1

C

INSTALL MATERIAL ASSEMBLY

6-3

OPERATION MANUAL

6-5

WALL TEMPLATE

D

INSTALLATION INSTRUCTION

6-2

6-4

TOP TEMPLATE

E

6-13

GREASE FILTER (x 2)

F

G



TRAY PACK

SPADPB037MRE0

4-3

TURNTABLE TRAY

Non-replaceable items

WRAP COVER
SSAKH0103MRE0

BOTTOM PAD
SPADBB025MRE0

B

C

D

E

F

G

H

1

2

3

45

COPYRIGHT © 1998 BY SHARP CORPORATION

ALL RIGHTS RESERVED.

No part of this publication may be repro­duced, stored in retrieval systems, or trans­mitted in any form or by any means, elec­tronic, mechanical, photocopying, record­ing, or otherwise, without prior written per­mission of the publisher.

PACKING CASE


H

6

22

'98 SHARP CORP. (4S2.530E) Printed in U.S.A