SHARP R409JS Service Manual

SUPPLEMENTAL SERVICE MANUAL

S44M236R409JE

MICROWAVE OVEN

R-409JS

MODEL

R-409JS

This is a supplemental Service Manual for Microwave Oven model R-409JS. This model is quite similar to the base models
R408JK/JW; (S24M231R408JE).

This supplemental manual must be used in conjunction with the base model service manual for complete operation,
service, safety and replacement parts 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..)

R-409JS

TABLE OF CONTENTS

Page
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

KEY UNIT TEST....................................................................................................................................................6

TOUCH CONTROL PANEL ASSY..................................................................................................................7

CPU UNIT CIRCUIT ............................................................................................................................................. 12

PARTS LIST ........................................................................................................................................................ 13

PACKING AND ACCESSORIES ......................................................................................................................... 17

This document has been published to be used for after

SHARP ELECTRONCS CORPORATION

sales service only.
The contents are subject to change without notice.

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

R-409JS

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

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

R-409JS

Don't Touch !
Danger High Voltage

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 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.

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 operated empty. To test for
the presence of microwave energy within a cavity, place a
cup of cold water on the oven turntable, close the door and
set the power to HIGH and set the microwave timer for two
(2) minutes. When the two minutes has elapsed (timer at
zero) carefully check 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 a microwave leakage test should be carried out.

1

R-409JS

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 switch shall prevent microwave radiation emission in excess of the requirement as above
mentioned. Secondary interlock relay and door sensing 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

O

C (68OF) 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 primary interlock switch/secondary interlock relay does turn the oven OFF before any door movement.

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

2

SERVICE MANUAL

R-409JS

MICROWAVE OVEN

R-409JS

FOREWORD

This supplemental Manual has been prepared to provide Sharp Electronics
Corp. Service Personnel with Operation and Service Information for the
SHARP MICROWAVE OVEN, R-409JS.

Model R-409JS, is quite similar to base models R-408JK/JW
(Ref.# S24M231R408JE).
It is recommended that service personnel carefully study the entire text of
this manual so that they will be qualified to render satisfactory customer
service.

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

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

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.

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-409JS

SPECIFICATION

ITEM DESCRIPTION

Power Requirements 120 Volts

14.0 Amperes, 1600 watts
60 Hertz
Single phase, 3 wire grounded

Power Output 1100 watts (IEC TEST PROCEDURE)

Operating frequency of 2450MHz

Case Dimensions Width 21-21/32"

Height 12-3/8"
Depth 18-7/16"

Cooking Cavity Dimensions Width 15-23/32

Height 9-21/32"

1.6 Cubic Feet Depth 17-7/8"

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

START, MINUTE PLUS pad, Cook pads, Defrost pads, Reheat pads, Number
selection pads, Power Level pad, Timer/Clock pad, Stop/Clear pad.

Oven Cavity Light Yes

Safety Standard UL Listed FCC Authorized

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

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.

Electrical Requirements
The electrical requirements are a 120 volt 60 Hz, AC only,
15 or 20 amp. fused electrical supply. It is recommended that a separate circuit serving only this appliance be provided. When
installing this appliance, observe all applicable codes and ordinances.
A short power-supply cord is provided to reduce risks of becoming entangled in or tripping over a longer cord.
Where a two-pronged wall-receptacle is encountered, it is the personal responsibility and obligation of the customer to contact

4

R-409JS

a qualified electrician and have it replaced with a properly grounded
three-pronged wall receptacle or have a grounding adapter properly
grounded and polarized. If the extension cord must be used, it should be
a 3-wire, 15 amp. or higher rated cord. Do not drape over a countertop
or table where it can be pulled on by children or tripped over accidentally.

CAUTION: DO NOT UNDER ANY CIRCUMSTANCES CUT OR RE-

MOVE THE ROUND GROUNDING PRONG FROM THIS
PLUG.

OVEN DIAGRAM

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

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

3. Removable turntable support.

4. Removable turntable.
The turntable will rotate clockwise or
counterclockwise.

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

6. Oven door with see-through window.

7. Ventilation openings. (Rear)

8. Auto-Touch control panel.

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

10. Wave guide cover.

11. Power supply cord

6

2

3

Grounded
Receptacle Box

3-Pronged
Plug

Grounding Pin

3-Pronged Receptacle

5

10

4

7

9

8

1

11

TOUCH CONTROL PANEL

NOTE:
The directed features are disa­bled after one minute when the
oven is not in use. These features
are automatically enabled when
the door is opened and closed or
the STOP/ CLEAR pad is pressed.

R-409JS

5

R-409JS

TEST PROCEDURES

PROCEDURE

LETTER

COMPONENT TEST

J 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. Using an ohmmeter and referring to the key unit matrix indicated on the control unit circuit, check the
circuit between the pins of the key unit that correspond to the STOP/CLEAR pad. When the pad is
pressed, the ohmmeter should indicate short circuit. When the pad is released, the ohmmeter should
indicate open circuit. If incorrect readings are obtained, the key unit is faulty and must be replaced.
About the other pads, the above method may be used.

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.

G8 G7 G6 G5 G4 G3 G2 G1

G9

MINUTE PLUS

G10G11G12G13

COOK

DEFROST

5

0

STOP

CLEAR

POPCORN

4
9

POWER

LEVEL

3

8

2

7

1

6

START

TIMER

CLOCK

REHEAT

Pin
NO. G1

Pin
NO. G13

Key unit ribbon cable

Key unit (Membrane Switch) front view

6

TOUCH CONTROL PANEL ASSEMBLY

OUTLINE OF TOUCH CONTROL PANEL

R-409JS

The touch control section consists of the following units.

(1) Key Unit
(2) Control Unit (The Control Unit consists of Power Unit and

LSI Unit).

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

Key Unit

The key unit is composed of a matrix, signals generated in the
LSI are sent to the key unit through P20-P27.
When a key pad is touched, a signal is completed through the
key unit and passed back to the LSI through P70, P71, P41,
P45, P47 and AN3 to perform the function that was re­quested.

Control Unit

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

1) Reset Circuit

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

2) Indicator Circuit

This circuit consists of 22 segments and 3 common
electrodes using a Liquid Crystal Display.

3) Power Source Circuit

This circuit generates voltages necessary in the control
unit from the AC line voltage.
In addition, the synchronizing signal is available in order
to compose a basic standard time in the clock circuit.

Symbol Voltage Application

VSS -5V LSI(IC1)

4) Relay Circuit

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

5) Buzzer Circuit

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

6) Synchronizing Signal Circuit

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

7) Door Sensing Switch

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

8) Back Light Circuit

A circuit to drive the back light (Light emitting diodes LD1­LD4).

7

R-409JS

D

D

D

DESCRIPTION OF LSI

LSI

The I/O signal of the LSI is detailed in the following table.

Pin No. Signal I/O Description

1-2

VL2-VL1

IN Power source voltage input terminal.

Standard voltage for LCD.

3-6 AN7-AN4 IN

Terminal to change cooking input according to the Model.

By using the A/D converter contained in the LSI, DC voltage in accordance with the Model
in operation is applied to set up its cooking constant.

7 AN3 IN Signal coming from touch key.

When either G13 line on key matrix is touched, a corresponding signal out of P20 - P27
will be input into AN3. When no key is touched, the signal is held at “H” level.

8 AN2 IN

To input signal which communicates the door open/close information to LSI.

Door close "H" level signal (0V). Door Open "L" level (-5V).

9 AN1 IN Terminal not used.

10 AN0 IN Terminal not used.

11-13 P57-P55 OUT Terminal not used.

14 CNTR0 OUT

Signal to sound buzzer (2.0 kHz).

A: key touch sound.

0.1 sec.

A

B: Completion sound.

B

15 P53 OUT Terminal not used.

16 P52 OUT Oven lamp, fan motor and turntable motor driving signal

To turn on and off shut off relay (RY1). The

16.7 msec.

square waveform voltage is delivered to the
RY1 driving circuit and RY2 control circuit.

2.0 sec.

During cooking

H : GN

L : -5V

H : GN

L : -5V

H : GND

L : -5V

17 P51 OUT Terminal not used.

18 P50 OUT Magnetron high-voltage circuit driving signal.

To turn on and off the cook relay (RY2). The
signals holds “L” level during microwave cook-

Maximum
output

ing and “H” level while not cooking. In other
cooking modes (variable cooking) the signal
turns to “H” level and “L” level in repetition

70% of maximum
output

OFF

ON

OFF OFF

ON

according to the power level.

19 P47 IN Signal similar to AN3.

When either G13 line on key matrix is touched, a corresponding signal will be input into
P46.

20 P46 OUT Terminal not used.

21 P45 IN Signal similar to AN3.

When either G12 line on key matrix is touched, a corresponding signal will be input into
P45.

22-23 P44-P43 OUT Terminal not used.

24 INT0 IN Signal synchronized with commercial power source frequency.

This is the basic timing for time processing of LSI.

16.7 msec.

24 sec.

8 sec.

H : GND

L : -5V

H : GND

L : -5V

H : GN

L : -5V

8

Pin No. Signal I/O Description

25 P41 IN Signal similar to AN3.

When either G11 line on key matrix is touched, a corresponding signal will be input into
P41.

26 P40 IN Connected to GND through the pull-down resistor.

27 RESET IN Auto clear terminal.

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

28 P71 IN

Signal similar to AN3.

When either G10 line on key matrix is touched, a corresponding signal will be input into
P71.

29 P70 IN

Signal similar to ANI3.

When either G9 line on key matrix is touched, a corresponding signal will be input into P70.

30 XIN IN

Internal clock oscillation frequency control input setting.

The internal clock frequency is set by inserting the ceramic filter oscillation circuit with
respect to XOUT terminal.

31 XOUT OUT Internal clock oscillation output.

Output to control oscillation input to XIN.

32 VSS IN

Power source voltage : -5.0V.

The power source voltage to the drive LSI is input to VSS terminal.

33 P27 OUT Key strobe signal.

Signal applied to touch-key section. A pulse signal is input to P70, P71, P41, P45, P47
and AN3 terminal while one of G8 line keys on key matrix is touched.

34 P26 OUT Key strobe signal.

Signal applied to touch-key section. A pulse signal is input to P70, P71, P41, P45, P47
and AN3 terminal while one of G7 line keys on key matrix is touched.

35 P25 OUT Key strobe signal.

Signal applied to touch-key section. A pulse signal is input to P70, P71, P41, P45, P47
and AN3 terminal while one of G6 line keys on key matrix is touched.

36 P24 OUT Key strobe signal.

Signal applied to touch-key section. A pulse signal is input to P70, P71, P41, P45, P47
and AN3 terminal while one of G5 line keys on key matrix is touched.

37 P23 OUT Key strobe signal.

Signal applied to touch-key section. A pulse signal is input to P70, P71, P41, P45, P47
and AN3 terminal while one of G4 line keys on key matrix is touched.

38 P22 OUT Key strobe signal.

Signal applied to touch-key section. A pulse signal is input to P70, P71, P41, P45, P47
and AN3 terminal while one of G3 line keys on key matrix is touched.

39 P21 OUT Key strobe signal.

Signal applied to touch-key section. A pulse signal is input to P70, P71, P41, P45, P47
and AN3 terminal while one of G2 line keys on key matrix is touched.

40 P20 OUT Key strobe signal.

Signal applied to touch-key section. A pulse signal is input to P70, P71, P41, P45, P47
and AN3 terminal while one of G1 line keys on key matrix is touched.

41 P17 OUT Back light signal. (Light emitting diodes) driving signal

42-46 P16-P12 OUT Terminal not used.

47-50

51-72

SEG25-SEG22

SEG21-SEG0

OUT Terminal not used.

OUT Segment data signal.

R-409JS

9

R-409JS

Pin No. Signal I/O Description

Connected to LCD.

The relation between signals are as follows:

LSI signal (Pin No.) LCD (Pin No.) LSI signal (Pin No.) LCD (Pin No.)
SEG0 (72)

SEG1 (71)
SEG2 (70)
SEG3 (69)
SEG4 (68)
SEG5 (67)
SEG6 (66)
SEG7 (65)
SEG8 (64)
SEG9 (63)
SEG10 (62)

................................

................................

................................

................................

................................

................................

................................

................................

................................

................................

...............................

SEG 0 SEG11 (61)
SEG 1 SEG12 (60)
SEG 2 SEG13 (59)
SEG 3 SEG14 (58)
SEG 4 SEG15 (57)
SEG 5 SEG16 (56)
SEG 6 SEG17 (55)
SEG 7 SEG18 (54)
SEG 8 SEG19 (53)
SEG 9 SEG20 (52)

SEG 10 SEG21 (51)

73 VCC IN Power source voltage : GND(0V).

74 VREF IN

A/D converter power source voltage : GND(0V).

The power source voltage to drive the A/D converter. Connected to GND.

75 AVSS IN A/D converter power source voltage : -5.0V.

The power source voltage to drive the A/D converter.

76 COM3 OUT Terminal not used.

77 COM2 OUT Common data signal.

Connected to LCD signal COM1.

78 COM1 OUT Common data signal.

Connected to LCD signal COM2.

79 COM0 OUT Common data signal.

Connected to LCD signal COM3.

80 VL3 IN Power source voltage input terminal.

Standard voltage for LCD. Connected to GND.

...............................

...............................

...............................

...............................

...............................

...............................

...............................

...............................

...............................

...............................

...............................

SEG 11
SEG 12
SEG 13
SEG 14
SEG 15
SEG 16
SEG 17
SEG 18
SEG 19
SEG 20
SEG 21

10

R-409JS

Installation

1. Remove remaining adhesive on the control panel frame surfaces with a soft cloth soaked in alcohol.

2. Make sure that the LCD sheet and the liquid crystal display is installed in position.

3. Remove the backing paper from the new membrane switch and ribbon cable.

4. Insert the ribbon cable of the membrane switch into the slit of the control panel frame.

5. Adjust the upper edge and right edge of the membrane switch to the small depression on the surface of the control panel
frame.

6. Attach the membrane switch to the control panel frame by rubbing with a soft cloth not to scratch.

7. Remove the backing paper from the new graphic sheet.

8. Adjust the upper edge and right edge of the graphic sheet to the large depression on the surface of the control panel frame.

9. Attach the graphic sheet to the control panel frame by rubbing with a soft cloth not to scratch.

10. Attach the ribbon cable to the control panel frame rear side.

11. Place the edge of the membrane switch’s ribbon cable on the lower portion of the liquid crystal display.

12. Insert the rubber connector into the long slit on the control panel frame.

13. Reinstall the control unit to the control panel frame with the three (3) screws.

NOTE:
Do not touch the contact surface of the ribbon cable (edge) and the rubber connector with a finger directly not to be
oxidized.
If display digits are missing or scrambled, remove control unit and make sure that there is not any trash or foreign
substance on the contact surface of the rubber connector. Use an adhesive tape to clean the contact surface of the
rubber connector.
(* Heat gun will soften adhesive.)

Liquid cr ystal
display

Control panel frame

LCD sheet

Rib bon
cable

Membrane
switch

Gr aphic
sheet

Rib bon cable
of membrane
switch

Contact surf ace

Contact
surface

Slit

Figure C-XXX Graphic Sheet and Membrane Switch Replacement

Liquid cr ystal
display

Control panel fr ame
(Rear side)

Long slit

Rub ber connector

11

R-409JS

1

A

B

C

2

3

45

6

A

B

C

D

E

D

E

Figure S-3. Control Unit Circuit

F

G

F

G

H

1

2

3

45

6

H

12

PARTS LIST

Note: The parts marked “

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

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

1- 1 RC-QZB018MRE0 M High voltage capacitor 1 AQ
1- 2 FH-DZB013MRY0 M High voltage rectifier assembly 1 AM
1- 3 RLMPTA087WRZZ M Oven lamp/socket 1 AE
1- 4 RMOTEA346WRE0 M Fan motor 1 AR
1- 5 FFS-BA019/KIT M
1- 6 QSW-MA085WRE0 M
1- 7 QFS-TA014WRE0 M Cavity temperature fuse 150
1- 8 RV-MZA323WRZZ M Magnetron 1 AZ
1- 9 RMOTDA252/KIT M Turntable motor 1 AL

∆

1-10 RTRN-B078MRE0 M Power transformer 1 AY
1-11 FACCDB003MRE0 M Power supply cord 1 AM

2- 1 GDAI-B069MRP0 M Base plate 1 AP
2- 2 GLEGPB004MRF0 M Foot 4 AB
2- 3 GCABUB092MRP0 M Outer case cabinet 1 AU

3- 1 CPWBFB093MRU0 M Control unit assy 1 BF
3- 2 HPNLFB016MRF0 M Control panel sub assembly 1 AN
3- 3 FUNTKB406MRE0 M Key sheet assy 1 AS
3- 4 FDECAB050MRK0 M Open button assy 1 AM
3- 5 MSPRRC045WRE0 M Open button spring 1 AA
3- 6 XEPSD30P08XS0 M Screw; 3mm x 6mm 5 AB
3- 7 HDECAB197MRP0 M Upper deco 1 AF
3- 8 HDECAB198MRP0 M Lower deco 1 AF
3- 9 QCNC-A020WRZZ M Rubber connector 1 AC
3-10 HPNLCB179MRF0 M Key fixing mold 1 AL
3-11 PSHEPA900WREZ M LED sheet 1 AG
3-12 RLCDSA107DRZZ M LCD 1 AG
3-13 LANGQB060MRP0 M PWB support angle 1 AE

∆∆

∆” may cause undue microwave exposure.

∆∆

ELECTRIC PARTS

Monitor switch (V-16G-2C25), C/T fuse (20A 250V AC) & Inst.
Primary interlock switch and door sensing switch (V-5230Q)

O

C 1AF

CABINET PARTS

CONTROL PANEL PARTS

R-409JS

1AF
2AE

OVEN PARTS

4- 1 LBNDKB007MRP0 M H.V. Capacitor band 1 AB
4- 2 LANGTB058MRP0 M Chassis support 1 AD
4- 3 PHOK-B018MRF0 M Latch hook 1 AF
4- 4 MLEVPB016MRF0 M Switch lever 1 AD
4- 5 PDUC-B125MRF0A M Magnetron duct 1 AE
4- 6 NFANPB006MRE0 M Fan blade 1 AC
4- 7 PDUC-B088MRF0 M Fan duct 1 AC
4- 8 ------------- M Oven cavity (Not a replaceable part) 1 -­4- 9 PCOVPB085MRP0 M Waveguide cover 1 AH
4-10 PPACGB014MRF0 M Turntable motor packing 1 AA
4-11 PCUSUB033MRP0 M Cushion 1 AC

DOOR PARTS

5 -1 FCOV-B164MRK0 M Door frame assembly 1 BD
5 -2 LSTPPB021MRF0 M Latch head 1 AD
5 -3 MSPRTA046WRE0 M Latch spring 1 AD
5 -4 FDORFB074MRT0 M Door panel 1 AQ
5 -5 PSHEPB021MRE0 M Sealer film 1 AE
5- 6 GCOVHB046MRF0 M Choke cover 1 AG
5- 7 LSTPPB044MRF0 M Door stopper 1 AA
5- 8 XOTSD40P08000 M Door screw 1 AA

13

R-409JS

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

MISCELLANEOUS

6- 1 FW-VZB217MRE0 M Main wire harnes 1 AT
6- 2 FROLPB025MRK0 M Turntable support 1 AN
6- 3 NTNT-A108WREZ M Turntable tray 1 AM
6- 4 TCAUAB050MRR0 M Monitor caution label 1 AA
6- 5 TCAUAB053MRR0 M DHHS/Screw caution label 1 AB
6- 6 TINSEB378MRK0 M Operation manual 1 AD
6- 7 QW-QZB016MRE0 M High voltage wire A 1 AC

SCREWS,NUTS AND WASHERS

7- 1 LX-BZA041WRE0 M Special screw 5 AA
7- 2 LX-CZ0052WRE0 M Special screw 2 AA
7- 3 XHTSD40P12RV0 M Screw : 4mm x 12mm 1 AA
7- 4 XOTSE40P12000 M Screw : 4mm x 12mm 9 AA
7- 5 XCBSD30P08000 M Screw : 3mm x 8mm 3 AA
7- 6 XHTSD40P08RV0 M Screw : 4mm x 8mm 3 AA
7- 7 LX-CZA070WRE0 M Special screw (Torx tamper proof screw) 2 AB

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.

14

R-409JS

1

OVEN AND CABINET PARTS

A

B

C

2

3

45

6

7-4

A

7-4

7-7

2-3

B

4-7

7-7

7-5

1-7

6-5

C

1-4

4-6

1-11

7-3

7-6

D

4-8

7-6

1-5

D

4-2

7-4

E

4-9

6-4

1-8

E

7-4

7-2

6-3

4-10

1-9

F

6-2

7-5

2-1

1-10

7-4

7-2

4-3

7-1

4-4

1-6

1-6

1-5

7-1

1-3

4-5

F

4-1

1-1

G

1-2

G

7-4

2-2

7-4

2-2

2-2

7-4

4-11

2-2

H

1

2

3

45

6

H

15

R-409JS

1

CONTROL PANEL PARTS

A

B

3-7

C

3-8

3-3

3-12

2

3-11

3-10

3-9

3

3-13

3-1

3-6

3-4

45

3-2

3-5

6

A

B

C

DOOR PARTS

D

D

5-5

5-6

5-1

5-7

E

E

5-4

5-8

F

F

5-2

5-3

G

MISCELLANEOUS

G

6-1

H

6-7

1

2

3

45

Actual wire harness may be different from illustration.

6

H

16

PACKING AND ACCESSORIES

DOOR PROTECTION SHEET

6-3 TURNTABLE TRAY

ON TOP

OF

THE OVEN

TRAY HOLDER

R-409JS

TOP PAD ASSEMBLY

PLASTIC BAG

6-6 OPERATION MANUAL

n-replaceable

o

N

6-2 TURNTABLE SUPPORT

PACKING CASE

s

tem

i

INTO THE OVEN CAVITY

BOTTOM PAD ASSEMBLY

17

R-409JS

COPYRIGHT © 2004 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

2004 SHARP CORP. (4M2.00E) Printed in U.S.A