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SUPPLEMENTAL SERVICE MANUAL
R-408EW
This is a supplemental Service Manual for Microwave Oven model R-408EW. This model is quite similar to the base
models; R-409EW/R-410EK/EW (S21M160R409EE).
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..)
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
TOUCH CONTROL PANEL ....................................................................................................................................8
PICTORIAL DIAGRAM ..........................................................................................................................................9
POWER UNIT CIRCUIT ....................................................................................................................................... 10
CPU UNIT CIRCUIT ............................................................................................................................................. 11
PARTS LIST ........................................................................................................................................................ 12
PACKING AND ACCESSORIES ......................................................................................................................... 16
SHARP ELECTRONCS CORPORATION
Service Headquarters: Sharp Plaza, Mahwah, New Jersey, 07430-2135
MODELS
TABLE OF CONTENTS
This document has been published to be used for after
sales service only.
The contents are subject to change without notice.
S91M174R408EE
MICROWAVE OVEN
R-408EW
R-408EW
Page
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Summary of Contents for Sharp R-408EW
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Page 1: Table Of Contents
MODELS R-408EW This is a supplemental Service Manual for Microwave Oven model R-408EW. This model is quite similar to the base models; R-409EW/R-410EK/EW (S21M160R409EE). This supplemental manual must be used in conjunction with the base model service manual for complete operation, service, safety and replacement parts information. -
Page 2: Precautions To Be Observed Before And During Servicing To Avoid Possible Exposure To Excessive Microwave Energy
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-408EW 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-408EW 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
This Manual has been prepared to provide Sharp Electronics Corp. Service Personnel with Operation and Service Information for the SHARP OPERATION MICROWAVE OVEN, R-408EW. The model R-408EW is quite similar to base models R-409EW/R-410EK/ EW (Ref.# S21M160R409EE). TROUBLESHOOTING GUIDE AND TEST PROCEDURE... -
Page 6: Product Specifications
R-408EW SPECIFICATION ITEM DESCRIPTION Power Requirements 120 Volts 13.8 Amperes, 1650 watts 60 Hertz Single phase, 3 wire grounded Power Output 1200 watts (IEC 705 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"... - Page 7 R-408EW a qualified electrician and have it replaced with a properly grounded Grounded Receptacle Box 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.
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Page 8: Operation
R-408EW OPERATION DESCRIPTION OF OPERATING SEQUENCE The following is a description of component functions during relay and is mechanically associated with the door so that oven operation. it will function in the following sequence. (1) When the door opens from the closed position, the... - Page 9 R-408EW Note:* Indicates component SCHEMATIC NOTE: CONDITION OF OVEN 1. Door Closed 2. CLOCK APPEARS ON DISPLAY MAGNETRON MONITOR TEMP. FUSE 20A FUSE COM. N.O. CAPACITOR 1.0µF AC 2300V (RY-2) (RY-1) PRIMARY INTERLOCK RELAY CONTROL UNIT N.O. COM. 120V AC...
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Page 10: Touch Control Panel
R-408EW TEST PROCEDURES PROCEDURE COMPONENT TEST LETTER 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. 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;... -
Page 11: Pictorial Diagram
R-408EW... -
Page 12: Power Unit Circuit
R-408EW CN-C S1NB10 9PIN LEAD WIRE HARNESS CN-A – OVEN LAMP TURNTABLE BUZZER MOTOR FAN MOTOR OVEN LAMP TURNTABLE MOTOR FAN MOTOR MICRO MICRO (BROWNER) DOOR SENSING SWITCH CN-B DOOR... -
Page 13: Cpu Unit Circuit
R-408EW... -
Page 14: Parts List
R-408EW PARTS 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. § DESCRIPTION... - Page 15 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 16 R-408EW OVEN AND CABINET PARTS 1-10 1-14 1-11 4-10 1-12 1-13 4-11...
- Page 17 R-408EW CONTROL PANEL PARTS DOOR PARTS 5-10 Actual wire harness may be different from illustration.
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Page 18: Packing And Accessories
R-408EW PACKING AND ACCESSORIES TOP PAD ASSEMBLY DOOR PROTECTION SHEET PLASTIC BAG TRAY HOLDER 6-5 TURNTABLE TRAY 6-8 OPERATION MANUAL 6-4 TURNTABLE SUPPORT BOTTOM PAD ASSEMBLY TRAY PACK PACKING CASE None-Replaceable items... - Page 19 R-408EW NOTES:...
- Page 20 No part of this publication may be repro- duced, stored in retrieval systems, or trans- mitted in any form or by any means, elec- tronic, mechanical, photocopying, recording, or otherwise, without prior written permission of the publisher. 2001 SHARP CORP. (9M2.61E) Printed in U.S.A...