SHARP R318BK Service Manual

R-318BK

SUPPLEMENTAL SERVICE MANUAL

S915R318BPK/

MICROWAVE OVEN

SENSOR COOK

BAKED

POPCORN

POTATO

FRESH VEGETABLE

FROZEN ENTREES

INSTANT ACTION

TO ADJUST QUANTITY . TOUCH PAD AGAIN

GROUND

FRESH/

MEAT

SEAFOOD

FRESH ROLL FROZEN ROLL

COMPU DEFROST

GROUND

STEAKS/

MEAT

CHOPS

KITCHEN

AUTO START

TIMER

CLOCK

POWER

STOP



LEVEL

CLEAR

MODEL

REHEAT

CHICKEN
BREAST

CHICKEN
PIECES

MINUTE

PLUS

START

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

R-318BK

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 Model R-318BK. This model is quite similar to base
model R-320BK. Use this supplemental manual together with the Base Model Service Manual
(Refer No. is S2805R320BPW/) for complete operation, service information, etc..

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

SCHEMATIC DIAGRAM ........................................................................................................................................5

TEST PROCEDURE ..............................................................................................................................................6

POWER UNIT CIRCUIT ........................................................................................................................................7

CPU UNIT CIRCUIT ..............................................................................................................................................8

PRINTED WIRING BOARD ...................................................................................................................................9

PARTS LIST ........................................................................................................................................................10

PACKING AND ACCESSORIES .........................................................................................................................14

SHARP CORPORATION

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

R-318BK

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 The 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-318BK

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 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-318BK

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-318BK

SERVICE MANUAL

MICROWAVE OVEN

R-318BK

FOREWORD

This Manual has been prepared to provide Sharp Electronics Corp. Service Personnel with Operation and Service
Information for the SHARP MICROWAVE OVEN, R-318BK.

The model R-318BK is quite similar to base model R-320BK (Refer No. is S2805R320BPW/).
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.

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-318BK

SPECIFICATION

ITEM DESCRIPTION

Power Requirements 120 Volts / 14 Amperes

60 Hertz
Single phase, 3 wire grounded

Power Output 1100 watts (IEC-705 TEST PROCEDURE)

Operating frequency of 2450MHz

Case Dimensions Width 20-1/2"

Height 11-7/8"
Depth 15-7/8"

Cooking Cavity Dimensions Width 13-3/4"

Height 8-3/8"

1.0 Cubic Feet Depth 14-7/8"
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

SENSOR COOK pads, INSTANT ACTION pads
COMPU DEFROST pads, Number selection pads
KITCHEN TIMER pad, AUTO START/CLOCK pad
MINUTE PLUS pad, POWER LEVEL pad
STOP/CLEAR pad, START pad

Oven Cavity Light Yes
Safety Standard UL Listed FCC Authorized

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

4

TOUCH CONTROL PANEL

SENSOR COOK

POPCORN

BAKED

POTATO

REHEAT

R-318BK

SCHEMATIC

NOTE: CONDITION OF OVEN

1. DOOR CLOSED

2. CLOCK APPEARS ON DISPLAY

MONITOR 
FUSE 20A

THERMAL 
CUT-OUT (OVEN)

FRESH VEGETABLES

INSTANT ACTION

TO ADJUST QUANTITY . TOUCH PAD AGAIN

GROUND

MEAT

FROZEN ENTREES

FRESH/

SEAFOOD

CHICKEN

BREAST

FRESH ROLL FROZEN ROLL

COMPU DEFROST

GROUND

MEAT

KITCHEN

TIMER

POWER

LEVEL

THERMAL 
CUT-OUT (MG.)

STEAKS/

CHOPS

AUTO START

CLOCK

STOP

CLEAR



CHICKEN

PIECES

MINUTE

PLUS

START

120V AC
60 Hz

GRN

A2

A1

CONTROL UNIT

OL FM

OVEN
LAMP

SECONDARY
INTERLOCK
SWITCH

(RY-1)

TTM

TURN-
TABLE
MOTOR

COM.

FAN 
MOTOR

(RY-2)

COM.N.O.

SH-B SH-A

PRIMARY
INTERLOCK
RELAY

DOOR
SENSING
SWITCH

N.O.

F3

F2

F1

Figure O-1. Oven Schematic-Off Condition

5

MONITOR 
SWITCH

AH SENSOR

POWER 
TRANSFORMER

CAPACITOR 1.0µF

AC 2300V

RECTIFIER

MAGNETRON

R-318BK

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 FFS­BA021WRK0 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.

PROCEDURE

LETTER

H BLOWN MONITOR FUSE TEST

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

2. Open the door and block it open.

3. Discharge high voltage capacitor.

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

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

RELAY, SECONDARY INTERLOCK SWITCH, DOOR SENSING SWITCH AND MONITOR

SWITCH FOR PROPER OPERATION.
If the monitor fuse is blown by improper switch operation, the monitor fuse and monitor switch must
be replaced with "monitor fuse and monitor switch assembly" part number FFS-BA021WRK0, even
if the monitor switch operates normally. The monitor fuse and monitor switch assembly is comprised
of a 20 ampere fuse and switch.

5. Reconnect all leads removed from components during testing.

6. Reinstall the outer case (cabinet).

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

8. Run the oven and check all functions.

TEST PROCEDURES

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.

6

R-318BK

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

G 8

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



clearing the control unit) to determine if

Baked
potato

Fish /

seafood

COMPU

DEFROST

Popcorn Reheat

Fresh

Vegetables



Ground meat

POWER

INSTANT

ACTION

Fresh

roll /

CLEAR

muffin

KITCHEN

TIMER



LEVEL

STOP

the control unit or key pad is at fault.

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.

G 9

G10

G11

G12

21

5

3

4

09876

MINUTE

PLUS

START

AUTO

START
CLOCK

Chicken

pieces




Chicken

breast



Frozen

roll /

muffin

Steaks /

chops

Frozen

entrees



Ground meat

1

A

B

C

D

E

AC

TURNTABLE
MOTOR
OVEN LAMP
FAN
MOTOR

AC

MICRO

AC

2

A 1

VRS1

A 2

a

b

N.O.

COM

N.O.

COM

T1

14

d

3 6

(J1)

c

RY1

RY2

3

D3

D4

V

R

D1-D4
11ES1

D7

D8

LD1-LD5

D1

D2

R4 27

D5

C1 0.1µ/50v

45

LD1 LD2LD3 LD4LD5

WH-1

R

V

Q2 2SB1238

R5 4.7k

D6

ZD1

+
–

R1 2.4k

C2 1000µ/35v

2SB1238

Q1

HZ16-1

C3 0.1µ/50v

V

+
–

C4 10µ/35v

A

R2 680 1/2w

SP1

R6 3.3k

C 1

C 2

C 3

R3 510

1/2w

C 4

C 5

C 6

C 7

C 8

VA

GND

VC

INT

BUZZER
TURNTABLE

MOTOR
OVEN LAMP
FAN
MOTOR

MICRO

6

A

B

C

D

E

F

G

H

1

NOTE

2

Q3 DTD143ES

+

C5
10µ/35v

–



V

R

: IF NOT SPECIFIED, 1/4w ± 5%
: IF NOT SPECIFIED, 1SS270A

Figure S-2. Power Unit Circuit

3

45

7

C 9

SH-B

SH-A

F

DOOR
SWITCH

G

H

6

R-318BK

1

A

HELP

B

LIQUID CRYSTAL DISPLAY

COOK SENSOR LBS KG DEF

C

D

CLEAR

ROLL

DEFROST)

ENTREES

CHOPS

ROLL

CLOCK

START

6

KEY UNIT

A

B

C

D

2



C 3

29

C 2

28
27 C 1
26 C 0
25 S16
24 S15
23 S14
22 S13
21 S12
20 S11
19 S10
18 S 9
17 S 8
16 S 7
15 S 6
14 S 5
13 S19
12 S20
11 S21

10 S22
9 S23
8 S24
7 S25
6 S26
5S 4
4S 3
3S 2
2S 1
1S 0

SEG7
SEG6
SEG5
SEG4
SEG3
SEG2
SEG1
SEG0
VCC
VREF
AVSS
COM3
COM2
COM1
COM0

SEG8

SEG9

SEG10

64

63

62

65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80

1VL2

2VL1

3AN7

3

SEG1161SEG1260SEG1359SEG1458SEG1557SEG1656SEG1755SEG1854SEG1953SEG2052SEG2151SEG2250SEG2349SEG24

48

SEG25

IC-1 IZA931DR

4AN6

5AN5

6AN4

7AN3

8AN2

9AN1

10AN0

11P57

12P56

13P55

14P54

15P53

16P52

17P51

18P50

SEG26

19P47

SEG27
454647 

20P46

P14
44

21P45

45

R67 15k

(J18)

(J19)

R66 15k

R65 15k

R64 15k

KITCHEN

FRESH

POPCORN

BAKED

REHEAT

R63 15k

P17
41

42 P16

43 P15

40

P20

39

P21

38

P22

37

P23

36

P24

35

P25

34

P26

33

P27

32

VSS

31

XOUT

30

XIN

29

P70

28

P71

27

RESET

26

P40

25

P41 VL3

22P44

23P43

24
INT0

CF1

R80 4.7k

R62 15k

R61 15k

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

R60 15k

G 8

C60 330pF/50v
C61 330pF/50v
C62 330pF/50v

C63 330pF/50v
R72 100k
R73 100k
R74 100k
R75 100k

54321

G 9

TIMER

LEVEL

POWER

ACTION)

(INSTANT

VEGETABLES

GROUND MEAT

FISH/

POTATO

SEAFOOD

BREAST

CHICKEN

PIECES

CHICKEN

09876

PLUS

MINUTE

G11

G10

STOP

FRESH

(COMPU

GROUND MEAT

FROZEN

STEAKS/

FROZEN

AUTO

START

G12

G12

C11 0.1µ/50v

E


R14

F

G

(J17)
(J15)
(J13)
(J11)


R13

Q10

2SA1037AK

1k
R10

–

+

(J16) 4.7k
(J14) 4.7k
(J12) 4.7k
(J10) 4.7k

10k 10k 10k

R12

/50v

0.1µ
C12

4.7k
R11

UDZ4.3B
ZD10

C10 47µ/16v

C14

/50v

0.1µ
C13

R15 4.7k

Q11



KRA101S

C30

R31 15k

R30 4.7k

Q40

KRA101S

C20

Q20

KRA101S

0.1µ/50v



(Q23)

(J20)

Q22

(J21)

DTA123JKA

D22

MA152WA

IC2

C103

C104

D101

BA4558

MA152

WA

0.1µ/50v

3.57kD
R112

R104 47k

R103 10k

IC2

+

R101

C101

C102

1.8kF

3.32kD
R105

R71 15k

0.015µ/25v

R70 15k

R102 360kF

R108 300kF

R107 620kF

R106 47k

330 1w
R90

R69 15k

R68 15k

R111 37.4kF

R110 75kF

R109 150kF

R113

: IF NOT SPECIFIED 1SS355

: IF NOT SPECIFIED 0.01µF / 25v

: IF NOT SPECIFIED 1/10w ± 5%

NOTE

Figure S-3. CPU Unit Circuit

AH SENSOR

F 1 F 2 F 3

E

F

G

C 2

C 1

H

VA

GND

1

C 3

C 4

VC

INT

2

C 5

BUZZER

C 6

RY1

3

8

C 7

C 8

C 9

RY2

DOOR

SWITCH

45

H

6

R-318BK

1

A

B

C

D

2

LD1

DIP

E

Q1

B

R6

D8

DU

VRB

ZD1

3

LD2

1

C3
C4

R3

1

3

R2

6

5

R1

45

LD3 LD4 LD5

(CN - C)

9

1

12

CN - C

R5

2

C5

4

E

B
Q3

SP1

987

D7

E

Q2

B

D6

SH - B

WH - 1

R4

D5

1

1

2

1

2

CN - B

WH - 1

SH - A

2

6

A

B

C

D

E

QKITPB026MRE0

F

G

H

RY2

VRS1

VH

CN - A

AC

XA

RY1

TTM

11

12

T1

AC

FM

OL

OMIF

DU

E

C2

C1

P

S

10
D4
D2
D1

D3

F

F

D9

(CN - D)

G

(D10)

RY3

H

1

Figure S-4. Printed Wiring Board of Power Unit

2

3

45

9

6

R-318BK

PARTS LIST

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

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

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

ELECTRIC PARTS

1- 1 QSW-MA131WRE0 2nd interlock switch / door sensing switch 2 AG
1- 1 QSW-MA110WRE0
1- 2 QFSHDA009WRE0 Fuse holder 1 AH
1- 3 FFS-BA021WRK0 Monitor fuse and monitor switch assembly 1 AL
1- 4 RTHM-A078WRE0 Thermal cut-out 125 deg. 1 AL
1- 5 FACCDA077WRE0 Power supply cord 1 AU
1- 6 FH-DZA083WRK0 High voltage rectifier assembly 1 AQ

*

1- 7 RC-QZA236WRE0 High voltage capacitor 1 AU

*

1- 8 RV-MZA267WRE0 Magnetron 1 BL

∆

*

1- 8 RV-MZA197WRE0 Magnetron

∆

*

1- 9 RMOTEA355WRE0 Fan motor 1 AU
1- 9 RMOTEA338WRE0 Fan motor
1-10 QSOCLA021WRE0 Oven lamp socket 1 AH
1-11 RLMPTA068WRE0 Oven lamp 1 AG
1-12 RMOTDA161WRE0 Turntable motor 1 AU
1-13 RTHM-A048WRE0 Thermal cut-out 170 deg. 1 AH
1-14 RTRN-A569WRE0 Power transformer 1 BP

*

1-15 FDTCTA176WRK0 AH sensor assembly 1 AV

2- 1 GCABUA631WRP0 Outer case cabinet 1 BB
2- 2 GDAI-A261WRW0 Bottom left plate 1 AP
2- 3 GDAI-A286WRW0 Bottom right plate 1 AN
2- 4 GLEGPA019WRE0 Foot 2 AD
2- 5 GLEGPA067WRF0 Leg 1 AE

3- 1 CPWBFA776WRK0 Power unit 1 BD
3- 1A QCNCMA446DRE0 2-pin connector (CN-A) 1 AC
3- 1B QCNCMA422DRE0 9-pin connector (CN-C) 1 AF
3- 1C FW-VZA196DRE0 2P wire harness (WH-1) 1 AD
3- 1D FW-VZA195DRE0 Switch harness A (SH-A) 1 AD
3- 1E FW-VZA197DRE0 Switch harness B (SH-B) 1 AD
3- 1F LHLD-A171WRF0 LED holder 1 AE
C1 RC-KZA087DRE0 Capacitor 0.1 uF 50V 1 AA
C2 VCEAB31VW108M Capacitor 1000 uF 35V 1 AF
C3 RC-KZA087DRE0 Capacitor 0.1 uF 50V 1 AA
C4-5 VCEAB31VW106M Capacitor 10 uF 35V 2 AA
D1-4 VHD11ES1///-1 Diode (11ES1) 4 AB
D5-8 VHD1SS270A/-1 Diode (1SS270ATA) 4 AA
LD1-5 VHPSLZ381A9-3 Light emitting diode 5 AC
Q1-2 VS2SB1238//-3 Transistor (2SB1238) 2 AA
Q3 VSDTD143ES/-3 Transistor (DTD143ES) 1 AC
R1 VRD-B12EF242J Resistor 2.4k ohm 1/4W 1 AA
R2 VRD-B12HF681J Resistor 680 ohm 1/2W 1 AA
R3 VRD-B12HF511J Resistor 510 ohm 1/2W 1 AB
R4 VRD-B12EF270J Resistor 27 ohm 1/4W 1 AB
R5 VRD-B12EF472J Resistor 4.7k ohm 1/4W 1 AA
R6 VRD-B12EF332J Resistor 3.3k ohm 1/4W 1 AA
RY1 RRLY-A076DRE0 Relay (OMIF-S-124LM) 1 AK
RY2 RRLY-A081DRE0 Relay (VRB24) 1 AL
SP1 RALM-A014DRE0 Buzzer (PKM22EPT) 1 AG
T1 RTRNPA111DRE0 Transformer 1 AP
VRS1 RH-VZA032DRE0 Varistor (10G471K) 1 AE
ZD1 VHEHZ161///-1 Zener diode (HZ16-1) 1 AA
3- 2 DPWBFB753WRK0 CPU unit 1 BD
3- 3 FPNLCB409WRK0 Control panel frame with key unit 1 BA
3- 3-1 FUNTKA907WRE0 Key unit 1 AU
3- 3-2 JBTN-B088WRF0 Open button 1 AF
3- 3-3 MSPRCA050WRE0 Open button spring 1 AB
3- 4 PSHEPA588WRE0 LED sheet 1 AE
3- 5 XEPSD30P08XS0 Screw; 3mm x 8mm 4 AA

4- 1 PCUSUA376WRP0 Cushion 1 AG
4- 2 PPACGA084WRF0 TTM packing 1 AF
4- 3 PHOK-A106WRF0 Latch hook 1 AL

∆

2nd interlock switch / door sensing switch (Interchangeable)

(Interchangeable)

(Interchangeable)

CABINET PARTS

CONTROL PANEL PARTS

OVEN PARTS

2AH

1BN

1AS

10

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

4- 4 LBNDKA099WRW0 Capacitor holder 1 AD
4- 5 NFANJA029WRE0 Fan blade 1 AL
4- 6 PDUC-A652WRP0 Fan duct 1 AU
4- 7 ************* Oven cavity (Not a replaceable part) 1--

∆

4- 8 LANGFA175WRP0 Chassis support 1 AX
4- 9 LANGQA452WRP0 Partition angle 1 AK
4-10 LANGQA492WRP0 MG thermo angle 1 AV
4-11 MLEVPA226WRF0 Switch lever 1 AF
4-12 NCPL-A045WRF0 Coupling 1 AH
4-13 PCUSGA399WRE0 Cushion 1 AF
4-14 PCOVPA275WRE0 Waveguide cover 1 AR
4-15 PCUSGA339WRP0 Cushion 1 AG
4-16 PCUSUA212WRP0 Cushion 1 AB
4-17 LANGTA338WRP0 Sensor mounting angle 1 AP
4-18 GCOVHA385WRF0 Choke cover 1 AG
4-19 PCUSGA385WRP0 Cushion 1 AH
4-20 PCUSUA192WRP0 Cushion 1 AD
4-21 PCUSUA329WRP0 Cushion 1 AC
4-22 PGIDHA058WRP0 MG air guide 1 AE
4-23 PCUSUA126WRE0 Cushion 1 AC

DOOR PARTS

∆

5- 1 FDORFA318WRT0 Door panel 1 BE
5- 2 PSHEPA382WRE0 Sealer film 1 AH

∆

5- 3 GWAKPA547WRR0 Door frame 1 AZ
5- 4 HPNL-A684WRR0 Door screen 1 AT

∆

5- 5 LSTPPA139WRF0 Latch head 1 AF
5- 6 MSPRTA187WRE0 Latch spring 1 AC
5- 7 PCUSUA504WRP0 Cushion 5 AB
5- 8 XCPSD40P08000 Screw : 4mm x 8mm 1 AA
5- 9 XCPSD40P08WN2 Screw : 4mm x 8mm 1 AC

MISCELLANEOUS

6- 1 FROLPA079WRK0 Turntable support 1 AQ
6- 2 NTNT-A084WRE0 Turntable tray 1 AQ
6- 3 FW-VZB678WRE0 Main wire harness 1 AW
6- 4 QW-QZA150WRE0 High voltage wire B 1 AF

*

6- 5 PZET-A012WRE0 Terminal insulator 1 AB
6- 6 TCAUAA166WRR0 DHHS caution label 1 AC
6- 7 TCAUAA200WRR0 Monitor caution label 1 AB
6- 9 TCAUAA240WRR0 Screw caution 1 AC

SCREWS,NUTS AND WASHERS

7- 1 XFPSD40P08K00 Screw : 4mm x 8mm 6 AA
7- 2 XHPSD30P06000 Screw : 3mm x 6mm 4 AA
7- 3 XHTSD40P08RV0 Screw : 4mm x 8mm 3 AA
7- 4 XFTSD40P08000 Screw : 4mm x 8mm 4 AA
7- 5 XOTSD40P12RV0 Screw : 4mm x 12mm 7 AA
7- 6 XOTSD40P12000 Screw : 4mm x 12mm 13 AA
7- 7 XOTSF40P08000 Screw : 4mm x 8mm 1 AA
7- 8 LX-CZA070WRE0 Special screw (Torx tamper proof screw) 2 AC

R-318BK

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.

11

R-318BK

1

OVEN AND CABINET PARTS

A

B

4-17

4-20

C

1-15

7-2

4-21

D

4-7

2

4-1

1-11

4-9

1-10

7-5

1-4

3

2-1

7-5

6-7

45

7-5

7-8

7-4

1-8

4-16

1-13

7-2

4-10

4-22

7-6

7-3

6-9

7-3

1-5

6

A

7-5

7-8

B

7-7

C

6-6

7-2

D

E

4-12

4-14

F

G

7-6

2-4

7-6

H

1

2-2

2-5

7-6

2

1-12

7-6

7-6

7-5

4-2

7-5

4-11

7-1

2-3

7-6

2-4

3

4-15

1-1

1-2

4-3

4-19

1-1

1-3

7-5

4-4

4-23

7-1

1-14

4-6

4-13

1-9

1-5

6-1

7-1

7-6

7-6

45

4-5

1-6

1-7

7-1

7-6

4-8

7-3

6-2

6

E

F

G

H

12

R-318BK

1

CONTROL PANEL PARTS

A

B

C

2

3 - 3

3-3-1

3-3- 2

3-3-3

3

3-1F

3 - 4

3 - 2

45

3 - 5

3 - 5

3 - 5

DOOR PARTS

3 - 1

6

A

B

C

D

E

5-3

5-4

F

G

5-7

5-1

5-7

5-7

5-6

5-9

5-7

5-2

4-18

D

5-8

E

F

5-5

G

6-3

H

Actual wire harness may be different from illustration.

1

MISCELLANEOUS

2

6-4

3

13

(CAPACITOR)

6-5

45

H

6

R-318BK

1

A

PACKING AND ACCESSORIES

B

C

D

E

F

INTO THE
OVEN CAVITY

2

DOOR PROTECTION SHEET
SPADPA204WRE0

6- 8 INSTRUCTION BOOK
& PRINTING MATTER

6- 2 TURNTABLE TRAY

6- 1 TURNTABLE SUPPORT

TRAY PACK
SPADFA397WRE0

3

45

CABINET COVER
SPAKHA009WRE0

TOP PAD ASSEMBLY
FPADBA341WRK0



PLASTIC BAG
SSAKHA034WRE0

BOTTOM PAD ASSEMBLY
FPADBA342WRK0

6

A

B

C

D

E

F

G

H

1

Not replaceable items.

2

3

45

COPYRIGHT © 1997 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
SPAKCD175WRE0

G

H

6

14

'98 SHARP CORP. (9S2.530E) Printed in U.S.A