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 the 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 Microwave Oven model R-1380/R-1381. This model is quite similar to
the base model R-1480/81 (S/M# S3807R1480X//).
This supplemental manual must be used in conjunction with the base model service manual for complete operation,
service, safety and replacement parts information.
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
PARTS LIST......................................................................................................................................................... 6
PACKING AND ACCESSORIES......................................................................................................................... 12
This document has been published to be used for after
SHARP CORPORATION
sales service only.
The contents are subject to change without notice.
Page 2
R-1380
R-1381
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.
Page 3
WARNING TO SERVICE PERSONNEL
Microwave ovens contain circuitry capable of producing very high voltage and current, contact with
following parts
fatal, electrical shock.
(Example)
High Voltage Capacitor, High Voltage Power Trans-
former, Magnetron, High Voltage Rectifier Assembly, High Voltage Harness etc..
Read the Service Manual carefully and follow all
instructions.
may result in a severe, possibly
Don't Touch !
Danger High Voltage
R-1380
R-1381
Before Servicing
1. Disconnect the power supply cord, and then
remove outer case.
2. Open the door and block it open.
3. Discharge high voltage capacitor.
WARNING:RISK OF ELECTRIC SHOCK.
DISCHARGE THE HIGH-VOLTAGE
CAPACITOR BEFORE SERVICING.
The high-voltage capacitor remains charged about 60
seconds after the oven has been switched off. Wait for 60
seconds and then short-circuit the connection of the highvoltage capacitor (that is the connecting lead of the highvoltage rectifier) against the chassis with the use of an
insulated screwdriver.
Whenever troubleshooting is performed the power supply
must be disconnected. It may in, some cases, be necessary
to connect the power supply after the outer case has been
removed, in this event,
1. Disconnect the power supply cord, and then remove
outer case.
2. Open the door and block it open.
3. Discharge high voltage capacitor.
4. Disconnect the leads to the primary of the power
transformer.
5. Ensure that these leads remain isolated from other
components and oven chassis by using insulation tape.
6. After that procedure, reconnect the power supply cord.
When the testing is completed,
1. Disconnect the power supply cord, and then remove
outer case.
2. Open the door and block it open.
3. Discharge high voltage capacitor.
4. Reconnect the leads to the primary of the power
transformer.
5. Reinstall the outer case (cabinet).
6. Reconnect the power supply cord after the outer case is
installed.
7. Run the oven and check all functions.
After repairing
1. Reconnect all leads removed from components during
testing.
2. Reinstall the outer case (cabinet).
3. Reconnect the power supply cord after the outer case is
installed.
4. Run the oven and check all functions.
Microwave ovens should not be run empty. To test for the
presence of microwave energy within a cavity, place a cup
of cold water on the oven turntable, close the door and set
the power to HIGH and set the microwave timer for two (2)
minutes. When the two minutes has elapsed (timer at zero)
carefully check that the water is now hot. If the water
remains cold carry out Before Servicing procedure and reexamine the connections to the component being tested.
When all service work is completed and the oven is fully
assembled, the microwave power output should be checked
and microwave leakage test should be carried out.
1
Page 4
R-1380
R-1381
MICRO W A VE 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±5½C (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 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
Page 5
SERVICE MANUAL
R-1380
R-1381
OVER THE RANGE
MICROWAVE OVEN
R-1380 / R-1381
FOREWORD
This Manual has been prepared to provide Sharp Electronics Corp.
Service Personnel with Operation and Service Information for the
SHARP OVER THE RANGE MICROWAVE OVEN, R-1380, R-1381
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.
Note
This supplemental service manual contains updated information only.
Please refer to base model service manual (R-1480/R-1481)
for complete service information.
PRODUCT DESCRIPTION
OPERATION
WIRING DIAGRAM
PARTS LIST
WARNING
Never operate the oven until the following points are ensured.
(A) The door is tightly closed.
(B) The door brackets and hinges are not defective.
(C) The door packing is not damaged.
(D) The door is not deformed or warped.
(E) There is not any other visible damage with the oven.
Servicing and repair work must be carried out only by trained service
personnel.
DANGER
Certain initial parts are intentionally not grounded and
present a risk of electrical shock only during servicing.
Service personnel - Do not contact the following parts while
the appliance is energized;
High Voltage Capacitor, Power Transformer, Magnetron,
High Voltage Rectifier Assembly, High Voltage Harness;
If provided, Vent Hood, Fan assembly, Cooling Fan Motor.
All the parts marked “*” on parts list are used at voltages more
than 250V.
Removal of the outer wrap gives access to voltage above 250V.
All the parts marked on “∆” parts list may cause undue microwave
exposure, by themselves, or when they are damaged, loosened
or removed.
SHARP ELECTRONICS CORPORATION
SHARP PLAZA, MAHWAH,
NEW JERSEY 07430-2135
3
Page 6
R-1380
R-1381
CAVITY
THERMAL CUT-OUT
MAGNETRON
TEMPERATURE FUSE
SCHEMATIC
NOTE: CONDITION OF OVEN
1. DOOR CLOSED
2. CLOCK APPEARS ON DISPLAY
FUSE
20A
120 V AC.
60 Hz
BLKWHT
GRN
GND
HOOD FAN
THERMAL
CUT OUT
B7
B5
B3
B1
HOOD
MOTOR
CAVITY
THERMAL CUT-OUT
CONTROL UNIT
RY4
RY5
High
N.C.
Low
HOOD
CAPACITOR
A1 A3B9A7A5N.O.
HOOD
LAMP
SSR
RY3RY1
TTM
HLHL
TURNTABLE
MOTOR
FAN
SECONDARY
INTERLOCK
SWITCH
Figure O-1. Oven Schematic-Off Condition
MAGNETRON
TEMPERATURE FUSE
COM.N.O.
FM
MOTOR
PRIMARY
RY2
COM.
OL
OVEN LAMP
INTERLOCK
RELAY
E1
E2
STM
STIRRER
MOTOR
POWER
TRANSFORMER
DOOR
SENSING
SWITCH
HIGH VOLTAGE
CAPACITOR
0.94µF
HIGH VOLTAGE
MONITOR
SWITCH
RECTIFIER
SCHEMATIC
NOTE: CONDITION OF OVEN
1. DOOR CLOSED
2. COOKING TIME PROGRAMMED
3. VARIABLE COOKING CONTROL "HIGH"
4. "START" PAD TOUCHED
MAGNETRON
FUSE
20A
120 V AC.
60 Hz
BLKWHT
GRN
GND
HOOD FAN
THERMAL
CUT OUT
CONTROL UNIT
B7
B5
B3
B1
HOOD
MOTOR
RY4
RY5
High
N.C.
Low
HOOD
CAPACITOR
A1 A3B9A7A5N.O.
HOOD
LAMP
SSR
HLHL
Figure O-2. Oven Schematic-Cooking Condition
RY3RY1
TTM
TURNTABLE
MOTOR
FAN
MOTOR
SECONDARY
INTERLOCK
SWITCH
COM.N.O.
OVEN LAMP
FM
COM.
OL
PRIMARY
INTERLOCK
RELAY
RY2
STM
STIRRER
MOTOR
E1
E2
DOOR
SENSING
SWITCH
MONITOR
SWITCH
POWER
TRANSFORMER
HIGH VOLTAGE
CAPACITOR
0.94µF
HIGH VOLTAGE
RECTIFIER
MAGNETRON
4
Page 7
H
1
to Chassis Support
2
12
3
CONTROL UNIT
IC1
CN-G
CN-E
1
CN-F
3
1
CN-B
9
RY4
1
RY5
CN-E
IC1
1
2
RY2:
PRIMARY
INTERLOCK
RELAY
T1
5
RY2
RY1
N.O.
COM.
N.O.
COM.
45
CN-A
7 5
C100
31
G
RY1
N.O.
RY1
COM.
RY2
N.O.
RY2
COM.
9
8
7
6
5
4
3
2
1
7
6
5
4
3
2
1
CN-B
ORG
ORG
WHT
CN-A
WHT
YLW
RED
ORG
ORG
ORG
RED
BLK
BLK
RED
RED
BLK
RED
2
1
CN-E
GRN
RED
F
GRN
GRN
COM.
DOOR SENSING SWITCH
N.C.
BLK
MONITOR
SWITCH
N.O.
RED
GRN
WHT
BLK
RED
FUSE & HOLDER
BLK
WHT
WHT
COM.
E
BLU
WHT
G
WHT
R
Y
D
6
RED
5
4
YLW
3
WHT
2
BLK
1
BLU
BLKRED
HOOD FAN MOTOR
RED
YLW
WHT
BLK
BLU
CAVITY
THERMAL
CUT-OUT
C
STIRRER MOTOR
RED
WHT
B
3
BLK
BLK
2
WHT
WHT
1
GRN
GRN
Blue
Marking
OVEN LAMP & SOCKET
MAGNETRON
TEMPERATURE
FUSE
Power Supply
cord 120V 60Hz
ORG
RED
WHT
REDRED
A
1
2
3
HIGH VOLTAGE COMPONENTS
MAGNETRON
HIGH VOLTAGE
WHT
WHT
RED
FAN
MOTOR
W
W
H
H
T
T
HIGH VOLTAGE
WIRE A
POWER
TRANSFORMER
R
E
D
CAPACITOR
HIGH
VOLTAGE
RECTIFIER
45
WHT
N.O.
WHT
GRY
GRY
TURNTABLE
MOTOR
Figure S-1. Pictorial Diagram
E
D
WHT
BLK
WHT
ORG
C
F
COM.
SECONDARY
INTERLOCK
SWITCH
to Right Base Plate
6
H
G
HOOD LAMPS
& SOCKETS
Blue Marking
WHT
GRY
ORG
ORG
B
ORG
HOOD FAN
THERMAL
CUT-OUT
RED
RED
A
6
R-1380
R-1381
Page 8
R-1380
R-1381
P AR TS LIST
Note: The parts marked “∆” may cause undue microwave exposure.
The parts marked “*” are used in voltage more than 250V."§" MARK: PARTS DELIVERY SECTION
REF. NO.PART NO.§DESCRIPTIONQ'TY CODE
ELECTRIC PARTS
1- 1FH-DZB012MRY0MHigh voltage rectifier assembly 1AK
7- 1XCPSD40P08000MScrew : 4mm x 8mm 2AA
7- 2XOTSF40P12000MScrew : 4mm x 12mm [R-1380]4AB
7- 2XOTSE40P12000MScrew : 4mm x 12mm [R-1381]4AA
7- 3XOTSD40P12000MScrew : 4mm x 12mm13AA
7- 4XBTSD40P08000MScrew : 4mm x 8mm 2AA
7- 5LX-CZA038WRE0MSpecial screw4AA
7- 6LX-CZ0052WRE0MSpecial screw2AA
7- 7LX-BZ0081YBE0MScrew : 4mm x 8mm 5AA
7- 8XCPSD30P08000MScrew : 4mm x 8mm2AA
7- 9LX-BZB012MRE0MUnit mounting screw4AD
HOW TO ORDER REPLACEMENT PARTS
To have your order filled promptly and correctly, please furnish the following information.
1. MODEL NUMBER2. 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.
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.
12
'2000 SHARP CORP. (2S2.530E) Printed in U.S.A
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