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Operating Manual
SUPPLEMENTAL SERVICE MANUAL
1000W / R-21J CA
This is a supplemental Service Manual for Model R-21JCA. This model is quite similar to base
model R-21HC. Use this supplemental manual together with the Base Model Service Manual
(Reference No. is S7813R21HCP//) for complete operation, service information, etc..
BEFORE SERVICING ...................................................................................................... INSIDE FRONT COVER
WARNING TO SERVICE PERSONNEL ................................................................................................................ 1
MICROWAVE MEASUREMENT PROCEDURE ................................................................................................... 2
FOREWORD AND WARNING ............................................................................................................................... 3
PRODUCT SPECIFICATIONS .............................................................................................................................. 4
OPERATION .......................................................................................................................................................... 4
SCHEMATIC DIAGRAM ........................................................................................................................................ 5
TEST PROCEDURE .............................................................................................................................................. 5
CONTROL PANEL ASSEMBLY ............................................................................................................................ 8
COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE ................................................................ 11
CONTROL PANEL CIRCUIT ............................................................................................................................... 14
PRINTED WIRING BOARD ................................................................................................................................. 15
PARTS LIST ........................................................................................................................................................ 16
PACKING AND ACCESSORIES ......................................................................................................................... 20
SHARP CORPORATION
MODEL
TIME GUIDE FOR ONE
SERVIN G
15 - 30 sec.
30 - 60 sec.
Bagel, Roll
Hot Dog
Muffin, Pastry
Pizza Slice
Pie Slice
Small Sandwic h
1 - 2 min.
2 - 3 min.
Beverag e, Soup
Cassero le, Stew
Large Sandwic h
Chili, Chowde r
Popcorn , 1.5 oz.
Popcorn , 3.5 oz.
1
40 50
1.5
30
E
F
D
G
C
H
20
I
B
2
10
J
A
0
K
2.5
L
In the interest of user-safety the oven should be restored to its original
M
N
3
O
T
S
P
6
R
Q
4
5
condition and only parts identical to those specified should be used.
INST RUC TION
S
With the door
close d,turn the
the desire d
timer to
time. Oven
will begin
opera ting imme
diatel y.
WARNING TO SERVICE PERSONNEL: Microwave ovens con-
To shut oven
off manu ally,re
to "0".
turn timer
tain 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 Capaci-
tor, High Voltage Power Transformer, Magnetron, High Volt-
age Rectifier Assembly, High Voltage Harness etc..)
TABLE OF CONTENTS
23
LIGHT DUTY
COMMERCIAL
MICROWAVE OVEN
R-21JCA
This document has been published to be used for after
sales service only.
The contents are subject to change without notice.
R-21JCA
S8213R21HCPA/
Page
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Table of Contents
Related Manuals for Sharp R-21JCA
Summary of Contents for Sharp R-21JCA
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Page 1: Table Of Contents
High Voltage Power Transformer, Magnetron, High Volt- age Rectifier Assembly, High Voltage Harness etc..) This is a supplemental Service Manual for Model R-21JCA. This model is quite similar to base model R-21HC. Use this supplemental manual together with the Base Model Service Manual (Reference No. -
Page 2: Precautions To Be Observed Before And During Servicing To Avoid Possible Exposure To Excessive Microwave Energy
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. -
Page 3: Warning To Service Personnel
R-21JCA WARNING TO SERVICE PERSONNEL Microwave ovens contain circuitry capable of pro- ducing very high voltage and current, contact with following parts may result in a severe, possibly fatal, electrical shock. (Example) High Voltage Capacitor, High Voltage Power Trans- former, Magnetron, High Voltage Rectifier Assem- bly, High Voltage Harness etc.. -
Page 4: Microwave Measurement Procedure
R-21JCA 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/cm at any point 5cm or more from the external surface of the oven, measured prior to acquisition... -
Page 5: Foreword And Warning
MICROWAVE OVEN R-21JCA FOREWORD This Manual has been prepared to provide Sharp Electronics Corp. Service Personnel with Operation and Service Information for the SHARP MICROWAVE OVEN, R-21JCA. The model R-21JCA is quite similar to base model R-21HC (Refer No. is S7813R21HCP//). -
Page 6: Product Specifications
R-21JCA SPECIFICATION ITEM DESCRIPTION Power Requirements 120 Volts 14 Amperes 60 Hertz / Single phase, 3 wire grounded Power Output 1000 watts (IEC 705 Test Procedure) Operating frequency of 2450MHz Case Dimensions Width 20-1/2" (520mm) Height 12-1/8" (309mm) Depth 16"... -
Page 7: Schematic Diagram
R-21JCA SCHEMATIC NOTE: CONDITION OF OVEN 1. LIGHT UP DIAL OFF. NOTE: Indicates components with potential above 250 V. 2. DOOR CLOSED. THERMAL THERMAL CUT-OUT CUT-OUT MONITOR 125˚C (OVEN) 145˚C (MAG.) FUSE 20A POWER TRANSFORMER AC120V 60 Hz CAPACITOR 0.94 µF... - Page 8 R-21JCA TEST PROCEDURES PROCEDURE COMPONENT TEST LETTER 1-2 Other possible troubles caused by defective control unit. a) Buzzer does not sound or continues to sound. b) Clock is not possible. c) Cooking time can not be set. When testing is completed, 1) Disconnect the power supply cord and then remove outer case.
- Page 9 R-21JCA TEST PROCEDURES PROCEDURE COMPONENT TEST LETTER STEPS OCCURRENCE CAUSE OR CORRECTION Only pattern at "a" is broken. *Insert jumper wire J1 and solder. Pattern at "a" and "b" are broken. *Insert the coil RCILF2003YAZZ between "c" and "d". 5) Make a visual inspection of the varistor.
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Page 10: Control Panel Assembly
R-21JCA CONTROL PANEL ASSEMBLY OUTLINE OF CONTROL PANEL 4) Reset Circuit Control Unit A circuit to generate a signals which resets the LSI to the Control unit consists of LSI, power source circuit, synchro- initial state when power is supplied. - Page 11 R-21JCA Pin No. Signal Description Auto clear terminal. RESET Signal is input to reset the LSI to the initial state when power is applied. Temporarily set to "L" level the moment power is applied, at this time the LSI is reset. Thereafter set at "H"...
- Page 12 R-21JCA SERVICING 1. Precautions for Handling Electronic Components 5) Re-connect the power supply cord after the outer This unit uses CMOS LSI in the integral part of the case is installed. circuits. When handling these parts, the following 6) Run the oven and check all functions.
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Page 13: Component Replacement And Adjustment Procedure
3. If the door is not closed. 4. If the outer case (cabinet) is not fitted. WARNING FOR WIRING To prevent an electric shock, take the following pre- 3) Sharp edge: cautions. Bottom plate, Oven cavity, Waveguide flange, 1. Before wiring, Chassis support and other metallic plate. - Page 14 R-21JCA 7. Release two (2) pins of door panel from two (2) holes of NOTE: After any service to the door; upper and lower oven hinges by lifting up. (A) Make sure that door sensing switch and secondary 8. Now, door sub assembly is free from oven cavity.
- Page 15 R-21JCA plate, referring to "ANTENNA MOTOR REMOVAL" . 3. Hook the hole of the antenna holder on the tab of the 5. Remove the ceramic shelf from the oven cavity bottom oven cavity bottom plate. Refer to Figure C-10. plate.
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Page 16: Control Panel Circuit
R-21JCA... -
Page 17: Printed Wiring Board
R-21JCA LD10 JP33 LD11 LD12 LD13 JP29 JP28 JP27 LD14 JP26 LD15 JP24 LD20 LD16 LD19 LD17 LD18 JP20 JP19 JP18 JP16 JP17 JP15 JP13 VRS1 Figure S-3. Printed Wiring Board... -
Page 18: Parts List
R-21JCA 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 FFS-BA015WRK0 Monitor fuse and monitor switch assembly... - Page 19 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.
- Page 20 R-21JCA OVEN AND CABINET PARTS 1-10 4-28 7-13 4-10 7-13 7-13 4-25 7-12 4-32 1-13 4-26 4-34 4-26 4-24 4-15 4-27 4-14 4-19 4-15 4-36 4-16 7-10 4-40 7-11 1-12 4-23 4-18 4-24 4-21 4-20 4-21 4-21 4-22 4-20 4-13...
- Page 21 R-21JCA CONTROL PANEL PARTS 3-2-1 3-2-2 DOOR PARTS 5-1-15 5-1-16 5-1-14 5-1-2 5-1-12 5-1-16 5-1-18 5-1-4-2 5-1-16 5-1-4-5 5-1-13 5-1-4-4 5-1-4 5-1-1 5-1-4-3 5-1-4-1 5-1-4-5 5-1-16 5-1-12 5-1-8 5-1-7 5-1-17 5-1-9 5-1-11 5-1-3 5-1-8 5-1-17 5-1-5 5-1-6 MISCELLANEOUS 5-1-10 Actual wire harness may be different from illustration.
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Page 22: Packing And Accessories
R-21JCA PACKING AND ACCESSORIES TOP PAD ASSEMBLY (FPADBA385WRK0) WRAP COVER (SSAKHA034WRE0) TRAY HOLDER DOOR PROTECTION SHEET (SPADFA435WRE0) (SPADPA204WRE0) INSTRUCTION BOOK BOTTOM PAD ASSEMBLY (FPADBA386WRK0) PACKING CASE Not Replaceable Items. SPAKCD803WREZ... - Page 23 R-21JCA...
- Page 24 No part of this publication may be reproduced, stored in retrieval systems, or transmitted in any form or by any means, electronic, mechanical, photo- copying, recording, or otherwise, without prior writ- ten permission of the publisher. '02 SHARP CORP. (8S0.730E) Printed in U.S.A...