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Sharp R-315JS Service Manual
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Sharp R-315JS Service Manual

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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 UNIT CIRCUIT .................................................................................................................................. 28
PRINTED WIRING BOARD ................................................................................................................................. 29
PARTS LIST ........................................................................................................................................................ 30
PACKING AND ACCESSORIES ......................................................................................................................... 31
SHARP CORPORATION
SERVICE MANUAL
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 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..)

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-315JS
R- 315JS
S5404R315JPS/
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  • Page 1: Table Of Contents

    R- 315JS SERVICE MANUAL S5404R315JPS/ MICROWAVE OVEN R-315JS 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 contain...

  • 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- 315JS 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- 315JS 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-315JS 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-315JS. 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- 315JS SPECIFICATION ITEM DESCRIPTION Power Requirements 120 Volts / 14.2 Amperes 60 Hertz Single phase, 3 wire grounded Power Output 1200 watts (IEC TEST PROCEDURE) Operating frequency of 2450MHz Case Dimensions Width 20-1/2" Height 12-1/4" Depth 17-5/8" NOTE: Internal capacity is calculated by measuring Cooking Cavity Dimensions Width 14-3/4"...
  • Page 7 R- 315JS properly grounded and polarized. If the extension cord must be used, it Grounded Receptacle Box 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- 315JS OPERATION DESCRIPTION OF OPERATING SEQUENCE The following is a description of component functions during (1) When the door opens from the closed position, the primary oven operation. interlock relay (RY2) and secondary interlock switch open their contacts. And contacts of the relay (RY1) remains OFF CONDITION closed.
  • Page 9 R- 315JS SCHEMATIC NOTE: CONDITION OF OVEN 1. DOOR CLOSED NOTE: " " indicates components with potential above 250V. 2. CLOCK APPEARS ON DISPLAY THERMAL CUT-OUT 145˚C (OVEN) C/T FUSE TEMPERATURE FUSE 150˚C (OVEN) POWER TRANSFORMER N.O. PRIMARY INTERLOCK RELAY (RY2) CAPACITOR 1.0µF...
  • Page 10 R- 315JS DESCRIPTION AND FUNCTION OF COMPONENTS DOOR OPEN MECHANISM CAUTION: BEFORE REPLACING A BLOWN C/T FUSE, TEST THE DOOR SENSING SWITCH, PRIMARY The door is opened by pushing the open button on the control INTERLOCK RELAY (RY2), SECONDARY IN- panel, refer to the Figure D-1.

  • Page 11: Troubleshooting Guide

    R- 315JS 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- 315JS CK = Check / RE = Replace RE RE A B C D F G H RE RE CK I CK CK CK J K L M TEST PROCEDURE PROBLEM CONDITION Home fuse or circuit breaker blows when power cord is plugged into wall receptacle C/T fuse blows when power cord is plugged into wall receptacle.
  • Page 13 R- 315JS TEST PROCEDURES PROCEDURE COMPONENT TEST LETTER magnetron is grounded and must be replaced. 6. Reconnect all leads removed from components during testing. 7. Reinstall the outer case (cabinet). 8. Reconnect the power supply cord after the outer case is installed. 9.
  • Page 14 R- 315JS TEST PROCEDURES PROCEDURE COMPONENT TEST LETTER 5. Reconnect all leads removed from components during testing. 6. Reinstall the outer case (cabinet). 7. Reconnect the power supply cord after the outer case is installed. 8. Run the oven and check all functions. NOTE: Be sure to use an ohmmeter that will supply a forward bias voltage of more than 6.3 volts.
  • Page 15 R- 315JS TEST PROCEDURES PROCEDURE COMPONENT TEST LETTER 5. Reconnect all leads removed from components during testing. 6. Reinstall the outer case (cabinet). 7. Reconnect the power supply cord after the outer case is installed. 8. Run the oven and check all functions. PRIMARY INTERLOCK SYSTEM TEST DOOR SENSING SWITCH 1.
  • Page 16 R- 315JS TEST PROCEDURES PROCEDURE COMPONENT TEST LETTER 4. If the C/T fuse is blown when the door is opened, check the primary interlock relay, secondary interlock switch and monitor switch according to the "TEST PROCEDURE" for those switches before replacing the blown C/T fuse. CAUTION: BEFORE REPLACING A BLOWN C/T FUSE, TEST THE PRIMARY INTERLOCK RELAY, SECONDARY INTERLOCK SWITCH, DOOR SENSING SWITCH AND MONITOR SWITCH FOR PROPER OPERATION.
  • Page 17 R- 315JS TEST PROCEDURES PROCEDURE COMPONENT TEST LETTER 3. If the Key unit or control unit is defective. 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) Replace the control unit assembly.
  • Page 18 R- 315JS TEST PROCEDURES PROCEDURE COMPONENT TEST LETTER DC. voltage indicated ....Defective relay. DC. voltage not indicated ..... Check diode which is connected to the relay coil. If diode is good, control unit is defective. RELAY SYMBOL OPERATIONAL VOLTAGE CONNECTED COMPONENTS Approx.

  • Page 19: Touch Control Panel

    R- 315JS TEST PROCEDURES PROCEDURE COMPONENT TEST LETTER 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.
  • Page 20 R- 315JS DESCRIPTION OF LSI The I/O signal of the LSI is detailed in the following table. Pin No. Signal Description Signal coming from touch key. When either G9 line on key matrix is touched, a corresponding signal out of P22 - P26 and P31 - P33 will be input into P50.
  • Page 21 R- 315JS Pin No. Signal Description Oven lamp, fan motor and turntable motor driving signal 16.7 msec. To turn on and off shut off relay (RY1). The H : GND square waveform voltage is delivered to the RY1 driving circuit and RY2 control circuit. L : -5V During cooking Terminal not used.
  • Page 22 R- 315JS Pin No. Signal Description 0.1 sec. BZO90 Signal to sound buzzer (2.0 kHz). H : GND A: key touch sound. L : -5V B: Completion sound. 2.0 sec. H : GND L : -5V Terminal not used. TOUCH CONTROL PANEL SERVICING A.

  • Page 23: Component Replacement And Adjustment Procedure

    R- 315JS PRECAUTIONS FOR USING LEAD-FREE SOLDER 1. Employing lead-free solder The "Main PWB" of this model employs lead-free solder. This is indicated by the "LF" symbol printed on the PWB and in the service manual. The suffix letter indicates the alloy type of the solder. Example: Sn-Ag-Cu Indicates lead-free solder of tin, silver and copper.
  • Page 24 R- 315JS WARNING FOR WIRING To prevent an electric shock, take the following precau- 3) Sharp edge: tions. Bottom plate, Oven cavity, Waveguide flange and 1. Before wiring, other metallic plate. 1) Disconnect the power supply cord. 4) Movable parts (to prevent a fault) 2) Open the door block it open.

  • Page 25: Pictorial Diagram

    R- 315JS 7. Remove the one (1) screw holding capacitor holder to 10. Remove capacitor holder. Capacitor is now free. bottom plate. CAUTION: WHEN REPLACING HIGH VOLTAGE RECTI- 8. Remove one (1) screw holding high voltage rectifier FIER AND HIGH VOLTAGE CAPACITOR, assembly to capacitor holder.
  • Page 26 4. Where the corners have been snipped off bend corner 7. Now the turntable motor is free. areas flat. No sharp edges must be evident after removal of 8. After replacement use the one (1) screw to fit the turntable the turntable motor cover.
  • Page 27 R- 315JS INSTALLATION 5. Install the fan motor to the oven cavity back plate with the 1. Install the fan blade to the fan motor shaft according to the two (2) screws. following procedure. CAUTION: 2. Hold the center of the bracket which supports the shaft of Do not hit the fan blade strongly when installed because the fan motor on the flat table.
  • Page 28 R- 315JS 2. The door sensing switch and secondary interlock switch 4. Reinstall outer case and check for microwave leakage interrupt the circuit before the door can be open. around door with an approved microwave survey meter. 3. Monitor switch contacts close when door is opened. (Refer to Microwave Measurement Procedure.) DOOR REPLACEMENT REMOVAL...
  • Page 29 R- 315JS...

  • Page 30: Control Unit Circuit

    R- 315JS...

  • Page 31: Printed Wiring Board

    R- 315JS Figure S-3. Printed Wiring Board of Power Unit...

  • Page 32: Parts List

    R- 315JS 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 QSW-MA147WRZZ Secondary interlock switch / door sensing switch FFS-BA034WRKZ C/T fuse(150deg.C/20A) and monitor switch (D3V-1G-2C25) assembly FACCDA083WRE0...

  • 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 FPADBA563WRKZ PACKING AND ACCESSORIES...
  • Page 34 R- 315JS 7-10 OVEN AND CABINET PARTS 7-10 7-10 4-15 4-12 7-12 7-11 4-16 4-13 7-10 7-10 7-10 1-11 4-14 4-12 4-17 4-10 1-10 4-12 4-11 7-10 7-10 7-10 4-12 7-10...
  • Page 35 R- 315JS...
  • Page 36 No part of this publication may be reproduced, stored in retrieval systems, or transmitted in any form or by any means, electronic, mechanical, pho- tocopying, recording, or otherwise, without prior written permission of the publisher. 2004 SHARP CORP. (5S1.700E) Printed in U.S.A...

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