SHARP R1874 Service Manual

SUPPLEMENTAL SER VICE MANUAL

S52M187R1874E

OVER THE RANGE

MIX CONV
DEFROST
SENSOR
TURNTABLE ON OFF COOK LBS OZ KG HELP

MODEL R-1874

MICROWA VE OVEN

R-1874

This is a supplemental Service Manual for Model R-1874.
This model is quite similar to Base Model R-1855A (S/M# S01M177R1875E).
Use this supplemental manual together with the Base Model Service Manual for complete operation and service information

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..)

TABLE OF CONTENTS

Page
PRECAUTIONS TO BE OBSERVED BEFORE AND DURING SERVICE TO

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

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

MICROWAVE MEASUREMENT PROCEDURE.....................................................................................................1

WARNING TO SERVICE PERSONNEL..........................................................................................................3

FOREWORD..........................................................................................................................................................4

PRODUCT SPECIFICATIONS...............................................................................................................................5

GENERAL INFORMATION ...................................................................................................................................5

PICTORIAL DIAGRAM ..........................................................................................................................................7

CONTROL PANEL CIRCUIT ..................................................................................................................................8

PARTS LIST..........................................................................................................................................................9

PACKING AND ACCESSORIES .........................................................................................................................15

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

(IN USA):

SHARP ELECTRONICS CORPORATION

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

OR:

(IN CANADA):

SHARP CORPORATION

SHARP ELECTRONICS OF CANADA LTD.

Head Office: 335 Britannia Road East, Mississauga, Ontario L4Z 1W9

[phone]

R-1874

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 release to the owner.

BEFORE SERVICING (USA)

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.

BEFORE SERVICING (CANADA)

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 OF
CANADA LTD. immediately.

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

Service personnel should inform SHARP ELECTRONICS OF CANADA LTD. 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.

R-1874

MICRO WA VE MEASUREMENT PROCEDURE (USA)

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/cm
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±5½C (68½F) 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.

2

at any point 5cm or more from the external

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.

1

R-1874

MICROWAVE MEASUREMENT PROCEDURE (CANADA)

After adjustment of the door switches are completed individually or collectively, switch test and microwave leakage test must
be performed with survey instrument and test result must be confirmed to meet the requirement of the performance standard
for microwave ovens as undermentioned.

A. Requirements:

Every microwave oven shall function in such a manner that when the oven is fully assembled and operating with its service
controls and user controls adjusted to yield the maximum output, the leakage radiation, at all points at least 5 cm. from the
external surface of the oven, does not exceed:

1) 1.0mW/cm2 with the test load of 275 ± 15 ml of water at an initial temperature 20 ±5oC.

2) 5.0mW/cm

3) 5.0mW/cm

2

when the outer enclosure is removed with a test load of 275 ± 15 ml of water at an initial temperature 20±5oC.

2

without a test load.

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 CSA and NHW performance standard
for microwave ovens must be used for testing recommended instruments are , NARDA 8100 and NARDA 8200.

2) Place the oven tray in the oven cavity.

3) Place the load of 275±15 ml of tap water initially at 20±5oC in the center of the oven cavity.
The water container shall be a low form of 600 ml 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, 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 with enclosure installed :

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 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.

C. Leakage test without enclosure:

1) Remove the enclosure (cabinet).

2) Grasp the probe of the survey instrument and hold it perpendicular to all mechanical and electric parts of the oven that is
accessible to the user of the oven including, but not limited to, the waveguide, cavity seams, magnetron gap between the
door and the body of the oven.

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

4) Measure carefully at the point of highest leakage and make sure that the highest leakage is under 5mW/cm2.

CAUTION: Special attention should be given to avoid electrical shock because HIGH VOLTAGE is generated during this test
No Load test

1) Operate the oven without a load and measure the leakage by the same method as the above test procedure " Leakage
test with enclosure installed"

2. Make sure that the highest leakage should not exceed 5mW/cm2.

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

2

WARNING TO SERVICE PERSONNEL

e

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

R-1874

Don't Touch !
Danger High Voltag

Before Servicing

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

2. Open the door and block it open.

3. Discharge high voltage capacitor.

WARNING:RISK OF ELECTRIC SHOCK.

DISCHARGE THE HIGH-VOLTAGE
CAPACITOR BEFORE SERVICING.

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

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

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

2. Open the door and block it open.

3. Discharge high voltage capacitor.

4. 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 re-
examine 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.

3

R-1874

SUPPLEMENTAL

SERVICE MANUAL

MICROWAVE OVEN

R-1874

FOREWORD

This Manual has been prepared to provide Sharp Electronics Corp.
Service Personnel with Operation and Service Information for the SHARP
MICROWAVE OVEN, R-1874.

The model R-1874 is quite similar to base model R-1855A
(Ref.# S99M138R1855E)

It is recommended that service personnel carefully study the entire text
of this manual and the base model's 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 no other visible damage with the oven.

PRODUCT DESCRIPTION

GENERAL INFORMATION

OPERATION

WIRING DIAGRAM

PARTS LIST

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.

USA MODEL

SHARP ELECTRONICS CORPORATION

SHARP PLAZA, MAHWAH,

NEW JERSEY 07430-2135

CANADIAN MODEL

OSAKA, JAPAN

4

SPECIFICATION

ITEM DESCRIPTION

Power Requirements

Power Output 850 watts (IEC-705 TEST PROCEDURE)

Convection Power Output 1400 watts
Case Dimensions Width 29-15/16"

Cooking Cavity Dimensions Width 17-1/8"

1.1 Cubic Feet Depth 13-13/16"
Hood lamp 2 bulbs, 20W x 2, Incandescent light bulbs
Hood fan Horizontal discharge 230 C.F.M. , Vertical discharge 240 C.F.M. ,
Control Complement Touch Control System

120 Volts / 13.2 Amperes (Microwave), 13.2 Amperes (Convection) - [UL Rating]
116 Volts / 13.0 Amperes (Microwave), 13.0 Amperes (Convection) - [CFS Rating]
60 Hertz
Single phase, 3 wire grounded

Operating frequency of 2450MHz

Height 16-11/32"
Depth 15- 9/32"

Height 8-1/16"

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 Powe

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

R-1874

CUSTOM HELP pad, SENSOR COOK pad, COMPU BROIL pad, COMPU ROAST pad
COMPU BAKE pad, SENSOR REHEAT pad, MINUTE PLUS pad, POPCORN pad
COMPU DEFROST pad, CONVECTION pad, REHEAT pad, LOW MIX/BAKE pad
HIGH MIX/ROAST pad, BROIL pad, SLOW COOK pad, KITCHEN TIMER pad
Number and temperature selection pads, CLOCK pad, KEEP WARM pad
TURNTABLE ON / OFF pad, POWER LEVEL pad, STOP/CLEAR pad,
START / TOUCH ON pad, Fan Hi/Lo, Light.

Oven Cavity Light Yes 20W x 1 Incandescent light bulb
Safety Standard UL Listed FCC Authorized

DHHS Rules, CFR, Title 21, Chapter 1, Subchapter J
Canadian Standards Association.
Department of National Health and Welfare CANADA, Industry CANADA.

Weight Approx. 71 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.

5

R-1874

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

Grounding Pin

3-Pronged Receptacle

9

OVEN DIAGRAM

Grounded
Receptacle Box

1

8

5

4

3

6

2

6

7

14

10

11

13

12

1. Oven door with see-through window.

2. Door hinges.

3. Stirrer cover.

4. Turntable motor shaft.

5. Oven lamp.
It will light when oven is operating or door is open.

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

7. One touch door open button.
Push to open door.

8. Auto-Touch control panel.

9. Ventilation openings.

10. Light Cover.

11. Grease filters.

12. Removable turntable.
The turntable will rotate clockwise or counterclockwise.
Only remove for cleaning.

13. Removable turntable support.

14. Plug

NOTE:
Some one-touch cooking features
as "MINUTE PLUS" are disabled af­ter one minute when the oven is not
used. These features are automati­cally enabled when the door is
opened and closed or the STOP/
CLEAR pad is pressed.

6

H

G

F

E

D

C

B

A

H

1

1

2

2

3

3

7

45

45

CN-G

CN-C

RY7

CN-F

RY9
RY10
RY8

CN-B

RY6

RY2:

CN-E

RY5

PRIMARY
INTERLOCK
RELAY

IC1

RY1

RY4

RY2

RY3

CN-F

T1

N.O.

N.O.

N.O.

COM.

COM.

COM.

CN-A

CN-C

CN-B

6

H

G

3
2

CN-F

1
6

5
4

CN-E

3

2

1

to oven cavity
front flange

RED

PPL
BRN

BLK

9
8
7
6
5
4
3

2

1
7

6
5
4
3

2

1

5
4
3

CN-A

2
1

G

WHT
RED

BLK

BLK
BLK

WHT
BRN
GRN
PNK

BRN

PPL

BLU

BLK

PNK

BLK

BLU

RED

ORG

GRY

YLW

RED

PPL

BLK
BLK

YLW
BRN

GRN

GRN
GRN

F

AH. SENSOR

COM.

DOOR SENSING SWITCH

N.C.

COM.

COM.

F

N.O.

PNK
GRN

BLK

MONITOR
FUSE AND
FUSE HOLDER

RED

WHT

BLK
BLK

MONITOR
SWITCH

N.O.

WHT

GRY

STIRRER MOTOR

Blue
Marking

DAMPER
SWITCH

BRN
WHT

B

B

L

R

K

N

HOOD FAN
THERMAL
CUT-OUT

YLW
RED

BLU
PPL
GRY

D

D

E

B

L
SECONDARY
INTERLOCK
SWITCH

Figure S-1. Pictorial Diagram

E

K

6

RED

5
4

YLW

3

WHT

2

BLK

1

BLU

WHT

BLK

OVEN LAMP & SOCKET

N.O.

FAN
MOTOR

GRY
RED

TURNTABLE
MOTOR

C

HOOD FAN MOTOR

TEMPERATURE FUSE (MG.)

R

B

E

L

D

K

YLW
GRY

COM.

DAMPER
MOTOR

GRY
BLU

ORG
WHT

C

B

BLK

3

BLK

BLK

2

WHT

GRY

1

GRN

GRN

CONVECTION
MOTOR

WHT
WHT

BLK

BLK
BLK

RED
WHT

2

BLK

1

BLK

Power Supply
cord 120V 60Hz

HEATING
ELEMENT

THERMISTOR

HIGH VOLTAGE COMPONENTS

GRY
BRN

BLK

WHT

MAGNETRON

F

FA

POWER TRANSFORMER

Blue Marking

B

2

GRY

1

PNK

HOOD LAMPS
& SOCKETS

HIGH VOLTAGE
CAPACITOR

GRY-GRY
BRN-BRN

H.V.
RECTIFIER

GRY
BRN

A

1

1

2

2

3

3

45

45

6

A

6

6

R-1874

Figure S-1. Pictorial Diagram

H

G

F

E

D

C

B

A

H

G

F

E

D

C

B

A

R-1874

(N)

1

AC120V
60Hz

A5

1

VRS 1

10G471K

2

d

b

a

(J1)

c

MOTOR RUN

2

CAPACITOR

TURNTABLE
MOT OR

FAN MOTOR

DAMPE R
MOT OR

3

CONVECTION
MOT OR

HOOD LAMP

A1

A3

B1

B3

B5

B7

C1

C100

RY4

RY5

RY6

RY7

RY8

8

COM

C3

C9

45

HOOD THE RMO

HOOD MOTOR

LOW

HIGH

COM

(

H)

OVEN LAMP

C5

C7

NO

COM

NO

MICR O

COM

CONVECTION
HER TER

NO

COM

6

H

RY9

RY10

RY1

RY2

RY3

T1

G

5

6

D1-D4 : 11ES 1

D1

3

4

D2

D20D21D22D23D24D25D26D27D28

D29

D4

D3

Q20 KR A101M

Q21 KR A101M

Q22 KR A101M

Q23 KR A101M

Q24 KR A101M

Q25 KR A101M

Q26 KR A101M

Q28 KR A101M

D32

Q29 KR A101M

+

–

C1 0.1µ/50v

C2 1000µ/35v

Q27
KRC243M

D30

R 1 4.3k

1/2w

ZD1

HZ6A3

Q1 2S B1238

R 2 1.5k

HZ16-1

+

–

C4 10µ/35v

C3 0.1µ/50v

R 4 510 1/2w

ZD2

R 3 680 1w

SP40

–

+

C20 10µ/35v

–

+

Q30
KRA101M

R 40 3.3k

C21 0.1µ/50v

C30

R 30 15k

R 31 4.7k R 62 36kF

D31

DOOR
SWITCH

Figure S-2. Touch Control Panel Circuit

F

ZD3 HZ5C 2

Q3
KRA101M

C9

0.1µ/50v

Q40
KRA101M

(J2)

C50 C60

R 50 15k

R 51 4.7k

DAMPE R
SWITCH

E4E3E2E1

C5

(J4)

ZD4

HZ4A2

+

–

(J6)

(J3)

D65

OVEN
THERMISTOR

E

CONTROL UNIT

Q4
DTA123E S

C8

R 8 4.7k

C11

C12

10µ/35v

(J5)

(J7)

R65 1k

C65

100µ/16v

–

+

Q60
KRC102M

R 64 3.6 kF

R 63 220F

C7

R 7 4.7k

CF 1 4MHz

(A) (B) (C )

AH S ENS OR

C10 0.1µ/50v

R 90 100k

Q90 KR A101M

VCC

VEE
AVS S
VREF

AN7

AN6

AN5

AN4

AN3

AN2

AN1

AN0

P55
P54
P53
P52
P51
P50
P47
P46
P45
P44
P43
P42

INT1

P40

RST

P71
P70
XIN

XOUT

VSS

F3

F2F1E6E5

D

IC1 IZ A719DR

R 75 100k

C74 330pF

C73 330pF

C72 330pF

C71 330pF

C70 330pF

(VP )

1

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

IC2 IZA 495DR

R 70 3.3k

R 71 3.3k

R 72 3.3k

NOTE

: IF N OT S PE CIFIE ED, 1/4w ± 5%

1

: IF NOT SPECIFIEED, 1SS270A

: IF N OT S PE CIFIE ED, 0.01µF /16v

(B)(C)

12

F
F
P1

(VP )

R 100 330 1w

(A)

1, 2

31, 32

R 91 100k

FLUORESCENT DISPLAY TUBE

MIX C ONV

DEF ROS T

4

SENSOR

ON OF F COOK LBS OZ K G HE LP

TURNTABLE

678

9

1011121315161718192023222425262728

P2 5

P3P4P5P6P7P8P9

R 92 100k

R 93 100k

29

P10

P11

P12

P13

P14

P15

P161G2G3G4G5G6G7G8G

2

3

45

3.3k

3.3k

D74

SENSOR

COMPU
ROAST

R81

COOK

FAN
HI/LO

3.3k

D75

R 82 3.3k

COMPU

BROIL

COMPU

BAKE

LIGHT

D76

R 77 3.3k

R 76 3.3k

R 73 3.3k

R 74 3.3k

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

CUSTOM

G 8

HELP

CONVEC

G 9

BROIL

G10

KITCHEN

G11

TIMER

TURNTABLE

G12

ON / OFF

R 78 3.3k

R79

D70

SENSOR
REHEAT

PREHEAT

SLOW
COOK

CLOCK

POWER

LEVE L

D72

D71

MINUT E

POPCORN

PLUS

LOW MIX

HIGH MIX

BAKE

ROAST

1

100°F2150°F3275°F4300°F5325°F

6

350°F7375°F8400°F9425°F0450°F

STOP

KEEP

WARM

CLEAR

D73

COMPU

DEF ROS T

TOUCH ON

R80

START

KEY UNIT

6

C

B

A

R-1874

PARTS LIST

"§" MARK: PARTS DELIVERY SECTION.

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

ELECTRIC PARTS

1- 1 FH-DZB017MRY0 M High voltage rectifier assembly 1 AM
1- 2 RC-QZA234WRE0 M High voltage capacitor 1 AR
1- 3 QFS-TA013WRE0 M Temperature fuse 150°C 1AG
1- 4 RHET-A174WRE0 M Convection heater 1 AZ
1- 5 RMOTDA211WRE0 M Turntable motor 1 AQ
1- 6 RMOTDA241WRE0 M Stirrer motor 1 AG
1- 7 RTHM-0044MRE0 M Thermal cut-out N.O. 60°C 1AG
1- 8 RTRN-B070MRE0 M Power transformer 1 BF
1- 9 RV-MZA302WRE0 M Magnetron 1 BC
1-10 QFSHDB003MRE0 M Fuse holder 1 AD
1-11 QSW-MA085WRE0 M
1-12 FFS-BA018/KIT M Monitor and sec. interlock switch with fuse assembly 1 AF
1-13 FACCDB011MRE0 M Power supply cord 1 AP
1-14 QSOCLB006MRE0 M Hood lamp socket 2 AE
1-15 FH-HZA053WRE0 M Thermistor 1 AP
1-16 QSOCLB006MRE0 M Oven lamp socket 1 AE
1-17 FMOTEA362WRK0 M Hood fan motor 1 BM
1-18 RMOTEA343WRE0 M Convection motor 1 AX
1-19 RMOTEB032MRE0 M Fan motor 1 AW
1-20 RLMPTA068WRE0 M Hood lamp and oven lamp 3 AG
1-21 FDTCTA217WRKZ M AH sensor 1 AW
1-22 RMOTDA242WRE0 M Damper motor 1 AH
1-23 RR-WZA031WRE0 M Noise resistor 1 AK
1-24 FPWBFB014MRK0 M Noise filter 1 AU

2- 1 PFIL-B002MRE0 M Grease filter 2 AF
2- 2 FDIF-B013MRK0 M Hood exhaust louver 1 AW
2- 3 GDAI-B052MRP0A M Base plate right 1 AH
2- 4 GDAI-B039MRP0A M Base plate left 1 AF
2- 5 GCABUB106MRP0 M Outer case cabinet 1 BC
2- 6 TMAPCB063MRR0 M Schematic diagram 1 AB
2- 7 FANGKB009MRY0 M Hood lamp glass assembly 1 AM
2-7-1 LANGQB016MRP0 M Hood lamp glass angle 1 AG
2-7-2 PGLSPB004MRE0 M Hood lamp glass 1 AH
2- 8 PCOVPB030MRT0A M Base cover 1 AX
2- 9 FDECAB028MRK0 M Sash left 1 AL
2-10 LSTY-B010MRP0 M Rear stay 1 AG

3- 1 DPWBFB061MRU0 M Control unit 1 BQ
3- 1A QCNCMA227DRE0 J 3-pin connector CN-A 1 AC
3- 1B QCNCMA230DRE0 J 4-pin connector CN-B 1 AC
3- 1C QCNCMA234DRE0 J 5-pin connector CN-C 1 AC
3- 1D QCNCMA267DRE0 J 6-pin connector CN-E 1 AC
3- 1E QCNCMA237DRE0 J 3-pin connector CN-F 1 AD
3- 1F QCNCWA030DRE0 J 12-pin connector CN-G 1 AE
3- 1G RV-KXB003MRE0 M Fluorescent display tube 1 AV
3- 1H 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,C12 VCEAB31VW106M J Capacitor 10 uF 35V 2 AB
C5 RC-KZA087DRE0 J Capacitor 0.1 uF 50V 1 AB
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,C5 VCKYD11CY103N J Capacitor 0.01 uF 16V 2 AH
C50,C11 VCKYD11CY103N J Capacitor 0.01 uF 16V 2 A H
C60 VCKYD11CY103N J Capacitor 0.01 uF 16V 1 AH
C70-74 VCKYD11HB331K J Capacitor 330 pF 50V 5 AA
C100 RC-QZB014MRE0 M Capacitor 7 uF 230V 1 AM
CF1 RCRS-A010DRE0 J Ceramic resonator (CST4.00MGW) 1 AD
D1-4 VHD11ES1///-1 J Diode (11ES1) 4 AB
D20-32 VHD1SS270A/-1 J Diode (1SS270A) 13 AA
D70-76 VHD1SS270A/-1 J Diode (1SS270A) 7 AA

Secondary interlock, third door sensing and damper switches

CABINET PARTS

CONTROL PANEL PARTS

3AE

9

R-1874

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

IC1 RH-IZA719DRE0 J LSI 1AW
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
Q20-26 VSKRA101M//-3 J Transistor (KRA101M) 7 AB
Q27 VSKRC243M//-3 J Transistor (KRC243M) 1 AB
Q28-30 VSKRA101M//-3 J Transistor (KRA101M) 3 AB
Q40 VSKRA101M//-3 J Transistor (KRA101M) 1 AB
Q60 VSKRC102M//-3 J Transistor (KRC101M) 1 AB
Q90 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
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
R50 VRD-B12EF153J J Resistor 15k ohm 1/4W 1 AA
R51 VRD-B12EF472J J Resistor 4.7k ohm 1/4W 1 AA
R62 VRN-B12EK363F J Resistor 36k ohm 1/4W 1 AA
R63 VRN-B12EK221F J Resistor 220 ohm 1/4W 1 AB
R64 VRN-B12EK362F J Resistor 3.6k ohm 1/4W 1 AA
R70-74 VRD-B12EF332J J Resistor 3.3k ohm 1/4W 5 AA
R75 VRD-B12EF104J J Resistor 100k ohm 1/4W 1 AA
R76-82 VRD-B12EF332J J Resistor 3.3k ohm 1/4W 7 AA
R90-93 VRD-B12EF104J J Resistor 100k ohm 1/4W 4 AA
R100 VRS-B13AA331J J Resistor 330 ohm 1W 1 AA
RY1-3 RRLY-B002MRE0 M Relay (DU24D1-1P(M)) 3 AH
RY4-9 RRLY-A075DRE0 J Relay (OJE-SS-124LM) 6 AG
RY10 RRLY-B001MRE0 M Relay (VE-24HSF-K) 1 AM
SP40 RALM-A014DRE0 J Buzzer (PKM22EPT) 1 AG
T1 RTRNPB004MRE0 M Transformer 1 AN
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 FPNLCB407MRK0 M Control panel sub. assembly 1 BB
3- 2-1 FUNTKB353MRE0 M Key unit 1 A T
3- 2-2 GMADIB037MRF0 M Display window 1 AE
3- 2-3 MSPRTA050WRE0 M Open button spring 1 AA
3- 2-4 FDECAB029MRK0 M Open button 1 AK
3- 2-5 LANGQB054MRP0 M Key fixing 1 AF
3- 3 XEPSD30P10XS0 M Screw; 3mm x 10mm 5 AA

OVEN PARTS

4- 1 FFTA-B004MRK0 M Exhaust damper assembly 1 AM
4- 2 FROLPB020MRK0 M Turntable support assembly 1 AS
4- 3 NTNT-B006MRE0 M Turntable tray 1 AZ
4- 4 LANGKB010MRP0 M Capacitor holder 1 BB
4- 5 FCOVPB002MRY0 M Stirrer cover assembly 1 AM
4- 6 FFAN-B008MRK0 M Stirrer fan assembly 1 AL
4- 7 ------------- M Oven cavity (not replaceable) 1 AP
4- 8 DHET-B001MRK0 M Convection heater unit 1 AT
4- 9 NCPL-B007MRF0 M Coupling 1 AE
4-10 NFANMB003MRK0 M Convection motor fan 1 AE
4-11 LANGQB031MRP0 M Convection motor angle 1 AF
4-12 PPACGB013MRE0 M Turntable motor packing 1 AC
4-13 LBNDK0054WRE0 M Heater mounting holder 2 AD
4-14 NFANMB004MRP0 M Convection fan 1 AE
4-15 PHOK-B013MRF0 M Latch hook 1 AG
4-16 FANGTB003MRY0 M Unit mounting plate 1 AV
4-17 PFPF-B002MRE0 M Heat protect L 1 AK
4-18 PPIPFB002MRE0 M Coller 1 AD
4-19 PREFHB006MRP0 M Heater cover L 1 AM
4-20 PDUC-B083MRP0 M Hood intake duct L 1 AG
4-21 NFANPB005MRE0 M Fan blade 1 AC
4-22 GBDYRB002MRP0 M Back plate 1 AX
4-23 FDUC-B046MRK0 M Fan duct 1 AM

10

R-1874

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

4-24 LBSHC0037WRE0 M Cord bushing 1 AB
4-25 FDUC-B050MRK0 M Exhaust duct 1 AK
4-26 MLEVPB016MRF0 M Open lever 1 AD
4-27 PCUSGB030MRP0 M Cushion 1 AC
4-28 MCAMPB001MRF0 M Damper cam 1 AC
4-29 PCUSGB032MRP0 M Damper cushion 1 AC
4-30 PFPF-B004MRE0 M Heat protect R 1 AD
4-31 PFTA-B003MRP0 M Damper plate 1 AD
4-32 PREFHB004MRP0 M Thermal cover R 1 AK
4-33 LANGQB033MRP0 M Hood lamp angle 1 AM
4-34 PREFHB005MRP0 M Thermal cover bottom 1 AK
4-35 LSTPPB024MRF0 M Door stopper 1 AD
4-36 PCOVPB047MRP0 M Oven lamp cover 1 AD
4-37 PCOVPB050MRP0 M Heat protect top sheet 1 AK
4-38 PCUSGB027MRP0 M Cushion 1 AA
4-39 PDUC-B056MRF0A M Hood exhaust duct 1 AW
4-40 PDUC-B057MRP0 M Top duct 1 AN
4-41 PDUC-B058MRF0 M Magnetron duct 1 AD
4-42 PDUC-B060MRP0 M Hood intake duct R 1 AH
4-43 PFILWA035WRE0 M Oven light screen 1 AF
4-44 PFPF-B003MRE0 M Heat protect top 1 AE
4-45 PCUSUB018MRP0 M Exhaust cushion A 1 AA
4-46 PCUSUB019MRP0 M Exhaust cushion B 1 AA
4-47 PCUSUB020MRP0 M Cushion 1 AA
4-48 PCUSUB024MRP0 M Cushion 1 AA
4-49 PCUSUB033MRP0 M Cushion 1 AD
4-50 PCUSGB035MRP0 M Cushion 1 AA
4-51 PCUSUB047MRP0 M Cushion 1 AD
4-52 PCUSUB046MRP0 M Cushion 1 AE
4-53 PFPF-B005MRE0 M Heat protect 1 AR
4-54 PFPF-B004MRE0 M Heat protect 1 AK
4-55 LANGQB025MRP0 M Noise filter angle 1 AE
4-56 PDUC-B122MRP0 M Exhaust duct B 1 AD

DOOR PARTS

5- 1 CDORFB312MRK0 M Door assembly, complete 1 BM
5- 2 DDORFB074MRY0 M Door panel assembly 1 BB
5- 3 FCOV-B216MRK0 M Door frame 1 AT
5- 4 PGLSPB047MRR0 M Door glass front 1 A R
5- 5 GCOVHB031MRF0 M Choke cover 1 AM
5- 6 LSTPPB025MRF0 M Latch head 1 AE
5- 7 LSTPPB037MRF0 M Glass stopper 2 AC
5- 8 MSPRTA046WRE0 M Latch spring 1 AB
5- 9 XCTSD40P08000 M Screw : 4mm x 8mm 6 AA
5- 10 PCUSUB022MRP0 M Door cushions 2 AC

MISCELLANEOUS

6- 1 CFZK-B131MRK0 M Installation material assembly 1 AN
6-1-1 LBSHC0040MRE0 M Grommet 1 AC
6-1-2 LX-BZ0195WRE0 M Toggle screw 4 AC
6-1-3 LX-MZB001MRE0 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 TINSEB141MRR0 M Installation instruction 1 AD
6- 3 TINSEB309MRR0 M Operation manual 1 AE
6- 4 TINSKB018MRR0 M Top template 1 AD
6- 5 TINSKB019MRR0 M Wall template 1 AD
6- 6 QW-QZB011MRE0 M High voltage wire A 1 AD
6- 7 TCADCB012MRR0 M Cook book 1 AP
6- 8 FW-VZB171MRE0 M Main harness A 1 A Y
6- 9 FAMI-B006MRM0 M High rack 1 AQ
6-10 FAMI-B005MRM0 M Low rack 1 AP
6-11 FW-VZB077MRE0 M Main harness C 1 AH
6-12 TCAUAB005MRR0 M Caution label 1 AB
6-13 TCAUAB041MRR0 M DHHS caution label 1 AA
6-13 TCAUAB034MRR0 M NHW caution label 1 AA
6-14 TCAUAB045MRR0 M Monitor caution label 1 AA
6-15 TCAUAB008MRR0 M User caution label (CANADIAN) 1 AA
6-16 TCAUAB018MRR0 M Cleaning label 1 AA

11

R-1874

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

SCREWS,NUTS AND WASHERS

7- 1 XCPSD40P08000 M Screw : 4mm x 8mm 2 AA
7- 2 XOTSF40P10000 M Screw : 4mm x 10mm 4 AB
7- 3 XCBSD30P08000 M Screw : 3mm x 8mm 2 AA
7- 4 XBTSD40P08RV0 M Screw : 3mm x 6mm 2 AA
7- 5 XCBSD30P08000 M Screw : 3mm x 8mm 2 AA
7- 6 XBTWW40P06000 M Screw : 4mm x 6mm 2 AA
7- 7 XOTSD40P12000 M Screw : 4mm x 12mm 24 AA
7- 8 XOTSF40P10000 M Screw : 4mm x 10mm 1 AA
7- 9 LX-BZ0208WRE0 M Screw : 4mm x 8mm 2 AA
7-10 LX-BZB011MRE0 M Unit mounting screw 2 AH
7-11 LX-CZA038WRE0 M Special screw 4 AA
7-12 XCBWW30P08000 M Screw : 3mm x 6mm 5 AA
7-13 LX-CZ0052WRE0 M Special screw 2 AA
7-14 XCTWW40P08RV0 M Screw : 4mm x 8mm 2 AA
7-15 XRESD40-06000 M E-ring 1 AA
7-16 XOTSD40P12000 M Screw : 4mm x 12mm 2 AC
7-17 XCTWW40P08000 M Screw : 4mm x 8mm 1 AA
7-18 LX-NZA002WRE0 M Nut: 4mm x 3.2mm 1 AB
7-19 XWSUW40-10000 M Spring Washer 1 AA
7-20 LX-BZA041WRE0 M Screw : 4mm x 8mm 9 AA
7-21 XWHSD50-20120 M Washer : 5mm x 2mm 1 AA
7-22 XWHUW40-08100 M Washer : 4mm x 0.8mm 2 AA
7-23 XWHUW50-08120 M Washer : 5mm x 0.8mm 1 AA
7-24 XOTSD40P08000 M Screw : 4mm x 8mm 9 AA
7-25 XOTWW40P10000 M Screw : 4mm x 10mm 10 A A
7-26 LX-CZB004MRE0 M Hood louver Screws 2 AA

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 authrized SHARP parts Distributor for your area.
Defective parts required return should be returned as indicated in the Service Policy.

12

R-1874

4-16

7-11

7-7

7-5

7-20

7-20

7-7

7-14

7-15

7-21

7-4

7-14

7-12

4-11

4-10

1-18

4-18

7-23

4-44

4-40

1-21

7-3

7-247-7

4-37

4-1

1-17

4-36

4-46

4-39

7-24

7-7

7-1

2-6

4-24

1-13

2-5

4-25

1-6

1-16

2-9

1-20

2-7

2-3

1-14

2-4

1-14

4-30

4-32

6-14

1-22

4-26

1-11

1-11

4-34

4-43

4-13

7-25

4-9

4-12

6-12

7-18

4-14

4-19

4-17

7-6

4-13

4-8

1-4

7-22

7-22

1-9

1-2

4-4

4-31

4-48

4-29

4-28

4-47

2-8

1-20

4-33

7-19

7-12

7-12

1-20

1-8

1-11

7-5

4-27

7-16

2-1

2-1

7-10

7-10

4-42

1-5

7-20

7-1

1-19

7-9

4-50

4-21

4-23

1-1

4-41

4-15

7-13

1-7

4-5

4-6

2-2

4-3

4-2

7-25

7-8

2-7-2

2-7-1

7-2

4-7

1-15

1-3

4-22

7-24

7-11

7-11

6-13

7-24

7-7

7-25

2-10

7-7

7-7

7-7

7-7

7-20

7-7

4-20

4-38

7-17

7-7

7-5

1-7

4-52

4-52

4-51

4-50

4-50

4-49

4-53

4-54

1-23

7-5

1-12

1-10

1-24

4-55

7-16

7-26

7-26

4-56

4-45

6-16

C

D

E

F

G

H

A

B

1

1

2

2

3

3

13

45

OVEN AND CABINET
PARTS

45

6

A

B

C

D

E

F

G

H

6

R-1874

1

2

3

45

A

3-3

3-2

3-2-5

3-2-1

B

6-15

7-7

3-2-4

3-2-3

C

5-7

3-2-2

3-3

3-1

4-35

5-5

5-2

5-10

5-9

6

A

B

C

5-6

D

E

F

5-1

6-1-1

6-1-2

6-1-3

6-1

6-1-4

6-1-5

6-1-6

6-1-7

5-8

5-3

5-4

6-8

6-6

G

D

E

F

G

6-9

6-11

H

1

2

3

45

6-10

H

6

14

PACKING AND ACCESSORIES

6-1

INSTALL MATERIAL ASSEMBLY

6-7

COOK BOOK

6-3

OPERATION MANUAL

6-5

WALL TEMPLATE

INSTALLATION INSTRUCTION

6-2

6-4

TOP TEMPLATE

2-1

GREASE FILTER (x 2)

DOOR PROTECTOR

R-1874

TOP PAD

WRAP COVER

TRAY HOLDER

6-10

6-9

4-3

DAMPER HOLDER

LOW RACK

HIGH RACK

MILLER MAT

TURNTABLE TRAY

4-2

TURNTABLE
SUPPORT
ASSEMBLY

DAMPER ASSEMBLY

4-1

TAPE

BOTTOM PAD

PACKING CASE

Non-replaceable items

15

'96 SHARP CORP. (8K5.550E) Printed in U.S.A

R-1874

NOTES

16

NOTES

R-1874

17

R-1874

COPYRIGHT © 2002 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.

18

'02 SHARP CORP. (10M2.42E) Printed in U.S.A