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Sharp R-419CK Supplemental Service Manual

Sharp r-419ck microwave oven supplemental service manual
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SUPPLEMENTAL SERVICE MANUAL
R-419CK
This is a supplemental Service Manual for Microwave Oven model R-419CK. This model is quite similar to the base
model R-420CK (S/M# S49M132R420CE).
This supplemental manual must be used in conjunction with the base model service manual for complete operation,
service, safety and replacement parts information.
BEFORE SERVICING ...................................................................................................... INSIDE FRONT COVER
WARNING TO SERVICE PERSONNEL ............................................................................................................... 1
MICROWAVE MEASUREMENT PROCEDURE ................................................................................................... 2
FOREWORD AND WARNING ............................................................................................................................. 3
PRODUCT SPECIFICATIONS ............................................................................................................................. 4
GENERAL INFORMATION ................................................................................................................................. 5
OPERATION ........................................................................................................................................................ 6
TEST PROCEDURE ............................................................................................................................................ 8
PICTORIAL DIAGRAM ....................................................................................................................................... 11
LSI UNIT CIRCUIT ............................................................................................................................................. 12
PARTS LIST ....................................................................................................................................................... 13
PACKING AND ACCESSORIES ........................................................................................................................ 17
SHARP ELECTRONCS CORPORATION
Service Headquarters: Sharp Plaza, Mahwah, New Jersey, 07430-2135
MODEL
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.
MICROWAVE OVEN
R-419CK
R- 419CK
S100M140R419E
Page

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Summary of Contents for Sharp R-419CK

  • Page 1: Table Of Contents

    Voltage Power Transformer, Magnetron, High Voltage Recti- fier Assembly, High Voltage Harness etc..) This is a supplemental Service Manual for Microwave Oven model R-419CK. This model is quite similar to the base model R-420CK (S/M# S49M132R420CE). 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

    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-419CK 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 - 4 1 9 C K 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 by a purchaser, and thereafter (through the useful life of the oven), 5 mW/cm at any point 5cm or more from the external surface of the oven.

  • Page 5: Foreword And Warning

    MICROWAVE OVEN R-419CK FOREWORD GENERAL INFORMATION This Manual has been prepared to provide Sharp Electronics Corp. Service Personnel with Operation and Service Information for the SHARP MICROWAVE OVEN, R-419CK. 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 - 4 1 9 C K SPECIFICATION ITEM DESCRIPTION Power Requirements 120 Volts / 13.3 Amperes/1550Watts 60 Hertz Single phase, 3 wire grounded Power Output 1100 watts (IEC-705 TEST PROCEDURE) Operating frequency of 2450MHz Case Dimensions Width 21-11/16" Height 12-3/8" Depth 17-3/8"...

  • Page 7: Oven Diagram

    R-419CK a qualified electrician and have it replaced with a properly grounded 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.

  • Page 8: Operation

    R - 4 1 9 C K OPERATION DESCRIPTION OF OPERATING SEQUENCE SENSOR COOKING CONDITION Using the SENSOR function, food is cooked without figuring 3.Sensor detects moisture and humidity and calculates time, power level or quantity. When the oven senses enough cooking time and variable power.

  • Page 9: Oven Schematic-Cooking Condition

    R-419CK SCHEMATIC NOTE: CONDITION OF OVEN Note:* Indicates component s with potentioal above 250V. 1. Door Closed 2. CLOCK APPEARS ON DISPLAY MAGNETRON MONITOR TEMP. FUSE 20A FUSE COM. N.O. CAPACITOR 1.0µF AH SENSOR AC 2300V (RY-2) (RY-1) PRIMARY INTERLOCK...

  • Page 10: Test Procedure

    R - 4 1 9 C K 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.
  • Page 11 R-419CK TEST PROCEDURES PROCEDURE COMPONENT TEST LETTER AH SENSOR TEST Checking the initial sensor cooking condition Warning: The oven should be fully assembled before following procedure. 1) The oven should be plugged in at least two minutes before sensor cooking.
  • Page 12 R - 4 1 9 C K TEST PROCEDURES PROCEDURE COMPONENT TEST LETTER CHECKING CONTROL UNIT (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 sensor connector that is mounted to control panel.

  • Page 13: Pictorial Diagram

    NOTE: The grounding conductor of the power supply cord has been grounded by power supply cord fixing screw. CAVITY TEMP. FUSE The screw must always be MAGNETRON TEMP. FUSE kept tight. DOOR N.O. SENSING CONTROL UNIT SWITCH POWER SUPPLY COM. CORD 120V 60Hz to Oven cavity (LSI UNIT)

  • Page 14: Lsi Unit Circuit

    Figure S-3. CPU Unit Circuit...

  • Page 15: Parts List

    R-419CK 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 Q'TY CODE ELECTRIC PARTS...
  • Page 16 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 17 R-419CK OVEN AND CABINET PARTS 4-13 7-10 1-14 1-11 4-10 1-12 1-13 4-12...

  • Page 18: Control Panel Parts

    R - 4 1 9 C K CONTROL PANEL PARTS 3-2-1 3-2-3 3-2-2 DOOR PARTS MISCELLANEOUS 5-1-1 5-1-2 Actual wire harness may be different from illustration.

  • Page 19: Packing And Accessories

    R-419CK 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 SPADPB038MRE0 PACKING CASE Non-replaceable items.
  • 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, record- ing, or otherwise, without prior written per- mission of the publisher. '2000 SHARP CORP. (1M3.20E) Printed in U.S.A...

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