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Sharp R-201FK Service Manual
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Sharp R-201FK Service Manual

Sharp R-201FK Service Manual

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R-206FW
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
CONTROL PANEL CIRCUIT ............................................................................................................................... 29
PRINTED WIRING BOARD ................................................................................................................................. 30
PARTS LIST ........................................................................................................................................................ 30
PACKING AND ACCESSORIES ......................................................................................................................... 34
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-201FK/W
R-203FW
R-205FW
R-206FW
R-201FK/W
R-203FW
R-205FW
R-206FW
S1201R201FPW/
Page

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  • Page 1: Table Of Contents

    R-201FK/W R-203FW R-205FW R-206FW SERVICE MANUAL S1201R201FPW/ MICROWAVE OVEN R-201FK/W MODELS R-203FW R-205FW R-206FW 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-201FK/W R-203FW R-205FW R-206FW 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-201FK/W R-203FW R-205FW R-206FW 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-201FK/ R-201FW/ R-203FW/ R-205FW/ R-206FW 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-201FK, R-201FW, R-203FW, R- OPERATION 205FW and R-206FW.

  • Page 6: Product Specifications

    R-201FK/W R-203FW R-205FW R-206FW PRODUCT DESCRIPTION SPECIFICATIONS ITEM DESCRIPTION Power Requirements 120 Volts 60 Hertz Single phase, 3 wire grounded Power Consumption 1100W / Approx. 9.6 Amperes Power Output 700 W nominal of RF microwave energy (IEC Test procedure) Operating frequency 2450 MHz Case Dimensions Width 18-1/8"...
  • Page 7 R-201FK/W R-203FW R-205FW R-206FW installing this appliance, observe all applicable codes and ordinances. Grounded Receptacle Box A short power-supply cord is provided to reduce risks of becoming entangled in or tripping over a longer cord. Where a two-pronged wall-receptacle is encountered, it is the personal respon-...

  • Page 8: Operation

    R-201FK/W R-203FW R-205FW R-206FW 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: Oven Schematic-Cooking Condition

    R-201FK/W R-203FW R-205FW R-206FW 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 COM. TRANSFORMER (RY-1) (RY-2) PRIMARY INTERLOCK RELAY...
  • Page 10 R-201FK/W R-203FW R-205FW R-206FW 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 control panel, refer to the Figure D-1.

  • Page 11: Troubleshooting Guide

    R-201FK/W R-203FW R-205FW R-206FW 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-201FK/W R-203FW R-205FW R-206FW 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-201FK/W R-203FW R-205FW R-206FW TEST PROCEDURES PROCEDURE COMPONENT TEST LETTER 5. To test for a shorted magnetron, connect the ohmmeter leads between the magnetron filament leads and chassis ground. This test should indicate an infinite resistance. If there is little or no resistance the magnetron is grounded and must be replaced.
  • Page 14 R-201FK/W R-203FW R-205FW R-206FW 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-201FK/W R-203FW R-205FW R-206FW TEST PROCEDURES PROCEDURE COMPONENT TEST LETTER 8. Run the oven and check all functions. PRIMARY INTERLOCK SYSTEM TEST DOOR SENSING SWITCH 1. Disconnect the power supply cord, and then remove outer case. 2. Open the door and block it open.
  • Page 16 R-201FK/W R-203FW R-205FW R-206FW TEST PROCEDURES PROCEDURE COMPONENT TEST LETTER BLOWN C/T FUSE 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 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"...
  • Page 17 R-201FK/W R-203FW R-205FW R-206FW TEST PROCEDURES PROCEDURE COMPONENT TEST LETTER 4) Replace the key unit. 5) Reconnect all leads removed from components during testing. 6) Re-install the outer case (cabinet). 7) Reconnect the power supply cord after the outer case is installed.
  • Page 18 R-201FK/W R-203FW R-205FW R-206FW TEST PROCEDURES PROCEDURE COMPONENT TEST LETTER RELAY TEST 1. Disconnect the power supply cord and then remove outer case. 2. Open the door and blocked it open. 3. Discharge high voltage capacitor. 4. Disconnect the leads to the primary of the power transformer.
  • Page 19 R-201FK/W R-203FW R-205FW R-206FW TEST PROCEDURES PROCEDURE COMPONENT TEST LETTER STEPS OCCURRENCE CAUSE OR CORRECTION Only pattern at "a" is broken. *Insert jumper wire J1 and solder. Pattern at "a" and "b" are broken. *Insert the coil RCILF2003YAZZ between "c" and "d".

  • Page 20: Touch Control Panel

    R-201FK/W R-203FW R-205FW R-206FW TOUCH CONTROL PANEL ASSEMBLY OUTLINE OF TOUCH CONTROL PANEL 3) Power Source Circuit The touch control section consists of the following units as This circuit generates voltage necessary in the control shown in the touch control panel circuit.

  • Page 21: Description Of Lsi

    R-201FK/W R-203FW R-205FW R-206FW 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 22 R-201FK/W R-203FW R-205FW R-206FW 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 23 R-201FK/W R-203FW R-205FW R-206FW 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.

  • Page 24: 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 25 R-201FK/W R-203FW R-205FW R-206FW 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 26 R-201FK/W R-203FW R-205FW R-206FW 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.

  • Page 27: Pictorial Diagram

    R-201FK/W R-203FW R-205FW R-206FW TTM packing 3. Re-connect the wire leads to the turntable motor. 4. Insert the tab of the turntable motor cover into the hole of the bottom plate. 5. Re-install the turntable motor cover to the bottom plate Turntable motor with one (1) screw.
  • Page 28 R-201FK/W R-203FW R-205FW R-206FW 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 29 R-201FK/W R-203FW R-205FW R-206FW 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;...
  • Page 30 R-201FK/W R-203FW R-205FW R-206FW...

  • Page 31: Control Panel Circuit

    R-201FK/W R-203FW R-205FW R-206FW COM1 COM2 COM3 SEG1 SEG2 SEG3 SEG4 SEG5 SEG6 SEG7 SEG8 SEG9 SEG10 SEG11 SEG12 SEG13 COM1 SEG14 COM0 SEG15 SEG16 SEG17 SEG18 SEG19 /25v 0.01 /25v 0.01 /25v 0.01 20kF /25v /25v 0.01 4.7k /25v 3.3k...

  • Page 32: Printed Wiring Board

    R-201FK/W R-203FW R-205FW R-206FW CHIP UNIT CN-B SIDE CODE (J1) Figure S-3. Printed Wiring Board PARTS LIST Note: The parts marked “ ” may cause undue microwave exposure. The parts marked “*” are used in voltage more than 250V. REF. NO.

  • Page 33: Control Panel Parts

    Outer case cabinet [R-201FW][R-203FW][R-205FW][R-206FW] 2- 2 GLEGPA074WRE0 Foot CONTROL PANEL PARTS 3- 1 FPNLCB636WRKZ Control panel frame with key unit [R-201FK] 3- 1 FPNLCB623WRKZ Control panel frame with key unit [R-201FW] 3- 1 FPNLCB622WRKZ Control panel frame with key unit [R-203FW]...
  • Page 34 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. Before attaching Control unit to Control CONTROL PANEL PARTS panel, foil side of Control unit must be cleaned by ethyl-alcohol.

  • Page 35: Oven And Cabinet Parts

    R-201FK/W R-203FW R-205FW R-206FW 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...

  • Page 36: Packing And Accessories

    TRAY PAD ASSY FPAK-A429WRKZ [R-205FW] (CPADBA287WRKZ) SPAKCD730WREZ [R-206FW] COPYRIGHT © 2002 BY SHARP CORPORATION ALL RIGHTS RESERVED. No part of this publication may be repro- duced, stored in retrieval systems, or trans- mitted in any form or by any means, elec-...

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