Sharp R-310FW Service Manual
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Sharp R-310FW Service Manual

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 ................................................................................................................................. 18
COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE ................................................................ 22
PICTORIAL DIAGRAM ........................................................................................................................................ 28
POWER UNIT CIRCUIT ...................................................................................................................................... 29
CPU UNIT CIRCUIT ............................................................................................................................................ 30
PRINTED WIRING BOARD ................................................................................................................................. 31
PARTS LIST ........................................................................................................................................................ 32
PACKING AND ACCESSORIES ......................................................................................................................... 36
SHARP CORPORATION
SERVICE MANUAL
MODELS
REHEAT CENTER
COMPU DEFROST
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.
39
MICROWAVE OVEN
R-310FK
R-310FW
R-310FK
R-310FW
S1202R310FPW/
Page

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Summary of Contents for Sharp R-310FW

  • Page 1: Table Of Contents

    R-310FK R-310FW SERVICE MANUAL S1202R310FPW/ MICROWAVE OVEN R-310FK MODELS R-310FW REHEAT CENTER COMPU DEFROST 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-310FK R-310FW 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- 310 FK R-310FW 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-310FK/ R-310FW 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-310FK and R-310FW. 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- 310 FK R-310FW 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 11-7/8" Depth 17-1/8"...

  • Page 7: Oven Diagram

    R-310FK R-310FW contact a qualified electrician and have it replaced with a properly Grounded Receptacle Box 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...

  • Page 8: Operation

    R- 310 FK R-310FW OPERATION DESCRIPTION OF OPERATING SEQUENCE The following is a description of component functions during relay and is mechanically associated with the door so oven operation. that it will function in the following sequence. (1) When the door opens from the closed position, the...

  • Page 9: Oven Schematic-Cooking Condition

    R-310FK R-310FW SCHEMATIC NOTE: CONDITION OF OVEN 1. DOOR CLOSED NOTE: " " indicates components with potential above 250V. 2. CLOCK APPEARS ON DISPLAY THERMAL MONITOR THERMAL CUT-OUT (OVEN) FUSE 20A CUT-OUT (MG.) N.O. POWER N.O. TRANSFORMER (RY-1) (RY-2) PRIMARY...
  • Page 10 R- 310 FK R-310FW DESCRIPTION AND FUNCTION OF COMPONENTS DOOR OPEN MECHANISM CAUTION: BEFORE REPLACING A BLOWN MONITOR FUSE TEST THE DOOR SENSING SWITCH, The door is opened by pulling the door. Refer to the Figure PRIMARY INTERLOCK RELAY (RY2), RELAY D-1.

  • Page 11: Troubleshooting Guide

    R-310FK R-310FW 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- 310 FK R-310FW CK = Check / RE = Replace RE RE A B C D E F F G H RE RE CK I CK CK CK J K L M TEST PROCEDURE PROBLEM CONDITION Home fuse or circuit breaker blows...
  • Page 13 R-310FK R-310FW TEST PROCEDURES PROCEDURE COMPONENT TEST LETTER 4. To test for an open filament, isolate the magnetron from the high voltage circuit. A continuity check across the magnetron filament leads should indicate less than 1 ohm. 5. To test for a shorted magnetron, connect the ohmmeter leads between the magnetron filament leads and chassis ground.
  • Page 14 R- 310 FK R-310FW TEST PROCEDURES PROCEDURE COMPONENT TEST LETTER HIGH VOLTAGE RECTIFIER 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. 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.
  • Page 15 R-310FK R-310FW TEST PROCEDURES PROCEDURE COMPONENT TEST LETTER CAUTION: IF THE THERMAL CUT-OUT INDICATES AN OPEN CIRCUIT AT ROOM TEMPERATURE, REPLACE THERMAL CUT-OUT. SECONDARY INTERLOCK SWITCH TEST 1. Disconnect the power supply cord, and then remove outer case. 2. Open the door and block it open.
  • Page 16 R- 310 FK R-310FW 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.
  • Page 17 R-310FK R-310FW TEST PROCEDURES PROCEDURE COMPONENT TEST LETTER c) When touching the pads, sometimes a pad produces no signal. If the Key unit is defective. 1) Disconnect the power supply cord, and then remove outer case. 2) Open the door and block it open.
  • Page 18 R- 310 FK R-310FW TEST PROCEDURES PROCEDURE COMPONENT TEST LETTER MINUTE CHICKEN PLUS PIECES FRESH STEAKS VEGETABLES CHOPS < > FROZEN POWER TIMER REHEAT GROUND RICE POPCORN START ENTREES LEVEL CENTER CLOCK MEAT STOP BAKED FROZEN GROUND KEEP WARM CLEAR...
  • Page 19 R-310FK R-310FW TEST PROCEDURES PROCEDURE COMPONENT TEST LETTER FOIL PATTERN ON THE PRINTED WIRING BOARD TEST To protect the electronic circuits, this model is provided with a fine foil pattern added to the primary on the PWB, this foil pattern acts as a fuse.

  • Page 20: Touch Control Panel

    R- 310 FK R-310FW TOUCH CONTROL PANEL ASSEMBLY OUTLINE OF TOUCH CONTROL PANEL 3) Power Source Circuit The touch control section consists of the following units. This circuit generates voltages necessary in the control unit from the AC line voltage.
  • Page 21 R-310FK R-310FW Pin No. Signal Description Back light circuit (Light emitting diodes) driving signal. 12-13 P56-P55 Terminal not used. 0.1 sec. CNTR0 Signal to sound buzzer (2.0 kHz). H : GND A: key touch sound. L : -5V 2.0 sec.
  • Page 22 R- 310 FK R-310FW Pin No. Signal Description Key strobe signal. Signal applied to touch-key section. A pulse signal is input to P41, P43, P44 and P45 terminal while one of G7 line keys on key matrix is touched. Key strobe signal.
  • Page 23 R-310FK R-310FW TOUCH CONTROL PANEL SERVICING A. On some models, the power supply cord between the 1. Precautions for Handling Electronic Components touch control panel and the oven itself is so short that the This unit uses CMOS LSI in the integral part of the two can’t be separated.

  • Page 24: Component Replacement And Adjustment Procedure

    WARNING FOR WIRING To prevent an electric shock, take the following pre- and Oven cavity. cautions. 3) Sharp edge: 1. Before wiring, Bottom plate, Oven cavity, Waveguide flange, 1) Disconnect the power supply cord. Chassis support and other metallic plate.
  • Page 25 R-310FK R-310FW CAUTION: 1. DISCONNECT OVEN FROM POWER SUP NOTE: When replacing the outer case, the 2 special PLY BEFORE REMOVING OUTER CASE. Torx screws must be reinstalled in the same 2. DISCHARGE THE HIGH VOLTAGE CA- locations. PACITOR BEFORE TOUCHING ANY OVEN COMPONENTS OR WIRING.
  • 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 8. After replacement use the one (1) screw to fit the of the turntable motor cover.
  • Page 27 R-310FK R-310FW 5. Remove the magnetron and chassis support from the INSTALLATION waveguide flange, referring to "MAGNETRON 1. Install the fan motor to the fan duct with the two (2) REMOVAL". screws. 6. Release the snap of the main wire harness from the fan duct.
  • Page 28 R- 310 FK R-310FW hook, pushing and pulling lower portion of the door If the door sensing switch, secondary interlock switch and toward the oven face. Both results (play in the door) monitor switch do not operate properly due to a should be less than 0.5mm.
  • Page 29 R-310FK R-310FW 3. Door is positioned with its face pressed toward cavity SEALER FILM face plate. Installation 4. Check for microwave leakage around door with an 1. Put the adhesive tape on the backing film of the sealer approved microwave survey meter. (Refer to Microwave film as shown in Fig.

  • Page 30: Pictorial Diagram

    R- 310 FK R-310FW RECTIFIER H.V.

  • Page 31: Power Unit Circuit

    R-310FK R-310FW CN-C CN-A 9PIN LEAD WIRE HARNESS S1NB10 – OVEN LAMP TURNTABLE BUZZER MOTOR FAN MOTOR OVEN LAMP TURNTABLE MOTOR FAN MOTOR MICRO MICRO SH-A DOOR DOOR SH-B SENSING SENSING SWITCH SWITCH...

  • Page 32: Cpu Unit Circuit

    R- 310 FK R-310FW COM1 COM2 COM3 SEG22 SEG21 SEG20 SEG19 SEG18 SEG17 SEG16 SEG15 SEG14 SEG13 SEG12 SEG11 SEG10 SEG7 SEG6 SEG5 SEG4 SEG3 SEG2 SEG1 SEG0 VREF XOUT AVSS COM3 COM2 COM1 RESET COM0 4.7k 4.7k 4.7k /25v 0.01...

  • Page 33: Printed Wiring Board

    R-310FK R-310FW SH - B CN - C (D2) (D3) CN - A Figure S-4. Printed Wiring Board of Power Unit...

  • Page 34: Parts List

    Transformer VRS1 RH-VZA032DRE0 Varistor (10G471K) 3- 2 DPWBFC163WRKZ CPU unit 3- 3 FPNLCB613WRKZ Control panel frame with key unit [R-310FW] 3- 3 FPNLCB614WRKZ Control panel frame with key unit [R-310FK] 3- 3-1 FUNTKB105WREZ Key unit [R-310FW] 3- 3-1 FUNTKB106WREZ Key unit [R-310FK]...
  • Page 35 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 36: Oven And Cabinet Parts

    R- 310 FK R-310FW OVEN AND CABINET PARTS 4-22 7-10 4-17 4-20 4-13 4-11 4-10 4-21 4-19 4-22 4-12 4-21 4-15 1-13 4-14 4-18 1-12 1-10 4-16 1-11...
  • Page 37 R-310FK R-310FW CONTROL PANEL PARTS DOOR PARTS 5-11 3-3-1 5-10 5-10 MISCELLANEOUS Actual wire harness may be different from illustration.

  • Page 38: Packing And Accessories

    FOAM SHEET SPAKHA012WREZ (only for R-310FK) 6- 4 INSTRUCTION BOOK & PRINTING MATTER BOTTOM PAD ASSEMBLY 6- 2 TURNTABLE TRAY FPADBA469WRKZ 6- 1 TURNTABLE SUPPORT TRAY PACK INTO THE SPADFA451WRE0 OVEN CAVITY Not replaceable items. PACKING CASE FPAK-A415WRKZ [R-310FW] FPAK-A416WRKZ [R-310FK]...
  • Page 39 R-310FK R-310FW...
  • Page 40 R- 310 FK R-310FW COPYRIGHT © 2002 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.

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