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BEFORE SERVICING ...................................................................................................... INSIDE FRONT COVER
WARNING TO SERVICE PERSONNEL ................................................................................................................ 1
MICROWAVE MEASUREMENT PROCEDURE ................................................................................................... 2
FOREWORD AND WARNING ............................................................................................................................... 3
PRODUCT SPECIFICATIONS .............................................................................................................................. 4
GENERAL INFORMATION ................................................................................................................................... 4
OPERATION .......................................................................................................................................................... 6
TROUBLESHOOTING GUIDE .............................................................................................................................. 9
TEST PROCEDURE ............................................................................................................................................ 10
TOUCH CONTROL PANEL ................................................................................................................................. 17
COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE ................................................................ 21
PICTORIAL DIAGRAM ........................................................................................................................................ 27
CONTROL PANEL CIRCUIT ............................................................................................................................... 28
PRINTED WIRING BOARD ................................................................................................................................. 29
PARTS LIST ........................................................................................................................................................ 30
PACKING AND ACCESSORIES ......................................................................................................................... 31
SHARP CORPORATION
SERVICE MANUAL
MODELS
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 con-
tain 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 Recti-
fier Assembly, High Voltage Harness etc..)
TABLE OF CONTENTS
This document has been published to be used for after
sales service only.
The contents are subject to change without notice.
35
MICROWAVE OVEN
R-209HK
R-209HW
R-209HK
R-209HW
S2304R209HPW/
Page
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Summary of Contents for Sharp R-209HW
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Page 1: Table Of Contents
R-209HK R-209HW SERVICE MANUAL S2304R209HPW/ MICROWAVE OVEN R-209HK MODELS R-209HW 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 con-... -
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 Food and Drug Administration's Center for Devices and Radiological Health immediately. -
Page 3: Warning To Service Personnel
R-209HK R-209HW 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-209HK R-209HW 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-209HK/ R-209HW GENERAL INFORMATION FOREWORD This Manual has been prepared to provide Sharp Electronics Corp. Service Personnel with Operation and Service Information for the SHARP MICROWAVE OVENS, R-209HK and R-209HW. OPERATION 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. -
Page 6: Product Specifications
R-209HK R-209HW PRODUCT DESCRIPTION SPECIFICATIONS ITEM DESCRIPTION Power Requirements 120 Volts 60 Hertz Single phase, 3 wire grounded Power Consumption 1200W / Approx. 10.3 Amperes Power Output 800 W nominal of RF microwave energy (IEC Test procedure) Operating frequency 2450 MHz Case Dimensions Width 18-1/8"... - Page 7 R-209HK R-209HW Electrical Requirements The electrical requirements are a 115 -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.
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Page 8: Operation
R-209HK R-209HW OPERATION DESCRIPTION OF OPERATING SEQUENCE The following is a description of component functions during so that it will function in the following sequence. oven operation. (1) When the door opens from the closed position, the secondary interlock switch, door sensing switch and OFF CONDITION primary interlock relay (RY2) open their contacts. - Page 9 R-209HK R-209HW SCHEMATIC NOTE: CONDITION OF OVEN 1. DOOR CLOSED 2. CLOCK APPEARS ON DISPLAY NOTE: " " indicates components with potentials above 250V. C/T FUSE TEMPERATURE FUSE (OVEN) N.O. POWER TRANSFORMER COM. (RY-2) (RY-1) PRIMARY INTERLOCK RELAY CAPACITOR CONTROL UNIT 0.82µF...
- Page 10 R-209HK R-209HW DESCRIPTION AND FUNCTION OF COMPONENTS DOOR OPEN MECHANISM open, the C/T fuse blows simultaneously with closing of the monitor switch contacts. The door is opened by pushing the open button on the CAUTION: BEFORE REPLACING A BLOWN C/T FUSE, control panel, refer to the Figure D-1.
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Page 11: Troubleshooting Guide
R-209HK R-209HW 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. -
Page 12: Test Procedure
R-209HK R-209HW CK = Check / RE = Replace A B C D E F F G H TEST PROCEDURE RE CK RE RE CK CK CK CK J POSSIBLE CAUSE DEFECTIVE PARTS PROBLEM CONDITION Home fuse blows when power cord is plugged into wall receptacle. - Page 13 R-209HK R-209HW TEST PROCEDURES PROCEDURE COMPONENT TEST LETTER chassis ground. This test should indicate an infinite resistance. If there is little or no resistance the magnetron is grounded and must be replaced. 6. Reconnect all leads removed from components during testing.
- Page 14 R-209HK R-209HW TEST PROCEDURES PROCEDURE COMPONENT TEST LETTER 4. Isolate the rectifier from the circuit. Using the highest ohm scale of the meter, read the resistance across the terminals and observe, reverse the leads to the rectifier terminals and observe meter reading. If a short is indicated in both directions, or if an infinite resistance is read in both directions, the rectifier is probably defective and should be replaced.
- Page 15 R-209HK R-209HW TEST PROCEDURES PROCEDURE COMPONENT TEST LETTER 4. Isolate the switch and connect the ohmmeter to the common (COM.) and normally open (NO) terminal of the switch. The meter should indicate an open circuit with the door open and a closed circuit with the door closed.
- Page 16 R-209HK R-209HW TEST PROCEDURES PROCEDURE COMPONENT TEST LETTER A continuity check across the C/T fuse terminals should indicate a closed circuit unless the temperature of the C/T fuse reaches approximately 248˚F(120˚C). An open C/T fuse indicates overheating of the magnetron. Check for restricted air flow to the magnetron, especially the cooling fa air guide.
- Page 17 R-209HK R-209HW TEST PROCEDURES PROCEDURE COMPONENT TEST LETTER 2-3 Other possible problems caused by defective control unit. a) Buzzer does not sound or continues to sound. b) Clock does not operate properly. c) Cooking is not possible. When testing is completed, 1) Disconnect the power supply cord and then remove outer case.
- Page 18 R-209HK R-209HW TEST PROCEDURES PROCEDURE COMPONENT TEST LETTER 8. If any abnormal condition is defected, replace the control unit. 9. Disconnect the power supply cord and then remove outer case. 10.Open the door and block it open. 11.Discharge high voltage capacitor.
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Page 19: Touch Control Panel
R-209HK R-209HW TEST PROCEDURES PROCEDURE COMPONENT TEST LETTER 6) After that procedure, re-connect the power supply cord. 7) Follow the troubleshooting guide given below for repair STEPS OCCURRENCE CAUSE OR CORRECTION The rated AC voltage is not present between Pin No. 3 of the 2-pin connector (A) and the Check supply voltage and oven power cord. - Page 20 R-209HK R-209HW DESCRIPTION OF LSI The I/O signal of the LSI are detailed in the following table. Pin No. Signal Description RESET Auto clear terminal. Signal is input to reset the LSI to the initial state when power is supplied.
- Page 21 R-209HK R-209HW Pin No. Signal Description Signal similar to K02. When either G9 line on key matrix is touched, a corresponding signal will be input into K01. Signal coming from touch key. When either G10 line on key matrix is touched, a corresponding signal out of R00, R01, R02, R03, P20 and P21 will be input into K02.
- Page 22 R-209HK R-209HW SERVICING 1. Precautions for Handling Electronic Components A. On some models, the power supply cord between the This unit uses CMOS LSI in the integral part of the touch control panel and the oven itself is so short that the circuits.
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Page 23: Component Replacement And Adjustment Procedure
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 24 R-209HK R-209HW to free it from retaining clips on the cavity face plate. PACITOR BEFORE TOUCHING ANY OVEN 6. Lift entire outer case from the unit. COMPONENTS OR WIRING. CAUTION: 1. DISCONNECT OVEN FROM POWER SUP- NOTE: When replacing the outer case, the 2 special PLY BEFORE REMOVING OUTER CASE.
- Page 25 R-209HK R-209HW CONTROL PANEL ASSEMBLY REMOVAL 1. Disconnect the power supply cord and remove outer case. 5. Remove the one (1) screw holding the control panel to 2. Open the door and block it open. the front plate of the oven cavity.
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Page 26: Pictorial Diagram
R-209HK R-209HW Re-install TTM packing 1. Re-install the TTM packing. 2. Re-install the turntable motor with theTTM packing with the single (1) screw. 3. Re-connect the wire leads to the turntable motor. Turntable motor 4. Insert the tab of the turntable motor cover into the hole of the bottom plate. - Page 27 R-209HK R-209HW Re-install 3. Secure latch hook (with two (2) mounting screws) to 1. Re-install each switch in its place. The secondary oven flange. interlock/monitor switches are in the lower position and 4. Install the switch lever to the oven cavity the door sensing switch is in the upper position.
- Page 28 R-209HK R-209HW 5. Catch two (2) pins of door panel on two (2) hole of upper Upper Oven Hinge and lower oven hinges. 6. Re-install choke cover to door panel by pushing. Note: After any service to the door; (A) Make sure that door sensing switch, secondary interlock switch and monitor switch are operating properly.
- Page 29 R-209HK R-209HW...
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Page 30: Control Panel Circuit
R-209HK R-209HW... -
Page 31: Printed Wiring Board
R-209HK R-209HW CHIP UNIT CN-B SIDE CODE (J1) Figure S-3. Printed Wiring Board... -
Page 32: Parts List
2- 2 GLEGPA074WRE0 Foot 2- 3 PCUSUA605WRPZ Cushion CONTROL PANEL PARTS 3- 1 FPNLCB706WRKZ Control panel frame with key unit [R-209HW] 3- 1 FPNLCB707WRKZ Control panel frame with key unit [R-209HK] 3- 1-1 PSHEPA888WREZ Graphic sheet [R-209HW] 3- 1-1 PSHEPA889WREZ... -
Page 33: Packing And Accessories
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. TOP PAD ASSEMBLY PACKING AND ACCESSORIES... - Page 34 R-209HK R-209HW OVEN AND CABINET PARTS 7-10 7-10 7-10 7-10 7-10 4-12 7-10 1-10 4-11 7-10 1-11 7-11 4-10 7-10...
- Page 35 R-209HK R-209HW CONTROL PANEL PARTS Before attaching Control unit to Control panel, foil side of Control unit must be cleaned by ethyl-alcohol. 3-1-1 DOOR PARTS 3-1-2 MISCELLANEOUS Actual wire harness may be different than illustration.
- Page 36 R-209HK R-209HW COPYRIGHT © 2003 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.