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Sharp R-530EK 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 ............................................................................................................................ 10
TEST PROCEDURE ............................................................................................................................................ 12
TOUCH CONTROL PANEL ................................................................................................................................. 21
COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE ................................................................ 27
PICTORIAL DIAGRAM ........................................................................................................................................ 33
POWER UNIT CIRCUIT ...................................................................................................................................... 34
LSI UNIT CIRCUIT ............................................................................................................................................... 35
PRINTED WIRING BOARD ................................................................................................................................. 36
PARTS LIST ........................................................................................................................................................ 37
PACKING AND ACCESSORIES ......................................................................................................................... 41
SHARP CORPORATION
SERVICE MANUAL
MODELS
1 2 0 0
W A T T S
SENSOR DEFROST
COOK
HELP
Sensor Cooking
Custom
Sensor
Popcorn
reheat
help
Fresh
Baked
Rice
vegetables
potatoes
Ground
Fish/
Poultry
meat
seafood
Frozen Foods
Entrees
Snacks
Vegetables
Let's Cook
15 Minutes
Breakfast
Lunch
Recipes
Defrost
From the
Beverage
Center
Pantry
Center
Timer
Keep Warm
Minute
Clock
Plus
Plus
Stop
Start
Power
Clear
Touch On
Level
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 the following parts may result in a
severe, possibly fatal, electrical shock. (High Voltage Capaci-
tor, High Voltage Power Transformer, Magnetron, High Volt-
age 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.
43
MICROWAVE OVEN
R - 530EK
R-530EW
R - 5 3 0 E K
R- 530EW
S3108R530EUW/
Page

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  • Page 1: Table Of Contents

    LSI UNIT CIRCUIT ............................... 35 PRINTED WIRING BOARD ..........................36 PARTS LIST ................................ 37 PACKING AND ACCESSORIES ......................... 41 This document has been published to be used for after SHARP CORPORATION sales service only. The contents are subject to change without notice.

  • 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 - 5 3 0 E K R- 530EW 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 - 5 3 0 E K R- 530EW 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-530EK/ R-530EW GENERAL INFORMATION FOREWORD This Manual has been prepared to provide Sharp Electronics Corp. Service Personnel with Operation and Service Information for the SHARP MICROWAVE OVEN, R-530EK, R-530EW. 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 - 5 3 0 E K R- 530EW SPECIFICATION ITEM DESCRIPTION Power Requirements 120 Volts / 13.8 Amperes 60 Hertz Single phase, 3 wire grounded Power Output 1200 watts (IEC TEST PROCEDURE) Operating frequency of 2450MHz Case Dimensions Width 24"...

  • Page 7: Oven Diagram

    R - 5 3 0 E K R- 530EW Where a two-pronged wall-receptacle is encountered, it is the personal Grounded 3-Pronged Plug Receptacle Box responsibility and obligation of the customer to contact a qualified electrician and have it replaced with a properly grounded three-pronged wall receptacle or have a grounding adapter properly grounded and polarized.

  • Page 8: Operation

    (2) When the door is closed from the open position, the control unit. (Figure O-1). monitor switch contacts open first. Then the contacts of 1. The display will show "SHARP SIMPLY THE BEST the secondary interlock switch and door sensing switch PRESS CLEAR AND PRESS CLOCK".
  • Page 9 R - 5 3 0 E K R- 530EW The time of supplementary cooking is determined by experi- ment with each food category and inputted into the LSI. An example of how sensor works: (POTATOES) 1. Potatoes at room temperature. Vapor is emitted very slowly.

  • Page 10: Oven Schematic-Cooking Condition

    R - 5 3 0 E K R- 530EW SCHEMATIC NOTE: CONDITION OF OVEN 1. DOOR CLOSED. NOTE: Indicates components with potential above 250 V. 2. CLOCK APPEARS ON DISPLAY. MAGNETRON MONITOR TEMP. FUSE 20A FUSE COM. N.O. CAPACITOR 1.0 F AC 2300V (RY-2) (RY-1)

  • Page 11: Description And Function Of Components

    R - 5 3 0 E K R- 530EW DESCRIPTION AND FUNCTION OF COMPONENTS DOOR OPEN MECHANISM open, the monitor fuse blows simultaneously with closing of the monitor switch contacts. The door is opened by pushing the open button on the CAUTION: BEFORE REPLACING A BLOWN MONITOR control panel, refer to the Figure D-1.

  • Page 12: Troubleshooting Guide

    R - 5 3 0 E K R- 530EW 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 13 R - 5 3 0 E K R- 530EW CK = Check / RE = Replace TEST PROCEDURE A B C D E E F F G H J K L M N RE RE RE RE CK CK CK CK POSSIBLE CAUSE DEFECTIVE PARTS PROBLEM...

  • Page 14: Test Procedure

    R - 5 3 0 E K R- 530EW TEST PROCEDURES PROCEDURE COMPONENT TEST LETTER MAGNETRON ASSEMBLY 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 15 R - 5 3 0 E K R- 530EW TEST PROCEDURES PROCEDURE COMPONENT TEST LETTER (HIGH VOLTAGES ARE PRESENT AT THE HIGH VOLTAGE TERMINAL, SO DO NOT ATTEMPT TO MEASURE THE FILAMENT AND HIGH VOLTAGE.) HIGH VOLTAGE RECTIFIER TEST 1. Disconnect the power supply cord, and then remove outer case. 2.
  • Page 16 R - 5 3 0 E K R- 530EW 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.
  • Page 17 R - 5 3 0 E K R- 530EW TEST PROCEDURES PROCEDURE COMPONENT TEST LETTER with the door opened (in this condition the plunger of the monitor switch is pushed in), the meter should indicate an open circuit. If improper operation is indicated, the switch may be defective. After testing the monitor switch, reconnect the wire lead to the monitor switch (COM) terminal and check the continuity of the monitor circuit.
  • Page 18 R - 5 3 0 E K R- 530EW TEST PROCEDURES PROCEDURE COMPONENT TEST LETTER 4) Reconnect the power supply cord after the outer case is installed. 5) Run the oven and check all functions. The following symptoms indicate a defective key unit. a) When touching the pads, a certain pad produces no signal at all.
  • Page 19 R - 5 3 0 E K R- 530EW TEST PROCEDURES PROCEDURE COMPONENT TEST LETTER the above method may be used (after clearing the control unit) to determine if the control unit or key pad is at fault. 5. Reconnect all leads removed from components during testing. 6.
  • Page 20 R - 5 3 0 E K R- 530EW TEST PROCEDURES PROCEDURE COMPONENT TEST LETTER MENU 1ST STAGE 2ND STAGE Steaks, chops or fish LEVEL TIME LEVEL TIME 0.5lb 30sec. 15sec. (5) If improper operation is indicated, the control unit is probably defective and should be checked. 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 21 R - 5 3 0 E K R- 530EW TEST PROCEDURES PROCEDURE COMPONENT TEST LETTER 10) Discharge high voltage capacitor. 11) Reconnect all leads removed from components during testing. 12) Re-install the outer case (cabinet). 13) Reconnect the power supply cord after the outer case is installed. 14) Run the oven and check all functions.
  • Page 22 R - 5 3 0 E K R- 530EW TEST PROCEDURES PROCEDURE COMPONENT TEST LETTER 9-2. Place the container on the center of tray in the oven cavity. 9-3. Close the door. 9-4. Touch the Timer/Clock pad once, the Power Level pad twice, the Start pad once and the number pad 1 once.

  • Page 23: Touch Control Panel

    R - 5 3 0 E K R- 530EW TOUCH CONTROL PANEL ASSEMBLY OUTLINE OF TOUCH CONTROL PANEL 4) Relay Circuit The touch control section consists of the following units. A circuit to drive the magnetron, fan motor, turntable motor and light the oven lamp. (1) Key Unit (2) Control Unit (The Control Unit consists of Power Unit 5) Buzzer Circuit...
  • Page 24 R - 5 3 0 E K R- 530EW LSI(IXA098DR) The I/O signal of the LSI(IXA098DR) is detailed in the following table. Pin No. Signal Description COM5 Common data signal : COM11. Connected to LCD signal COM11. COM4 Common data signal : COM12. Connected to LCD signal COM12.
  • Page 25 R - 5 3 0 E K R- 530EW Pin No. Signal Description INT0 Signal synchronized with commercial power source frequency. H : GND This is the basic timing for time processing of LSI. L : -5V 16.7 msec. Key strobe signal. Signal applied to touch-key section.
  • Page 26 R - 5 3 0 E K R- 530EW Pin No. Signal Description Terminal not used. XCOUT Terminal not used. XCIN Connected to VC. Terminal not used. Power source voltage: GND(0V). The power source voltage to drive LSI is input to VCC terminal. OSCSEL Connected to VC(-5V).
  • Page 27 R - 5 3 0 E K R- 530EW Pin No. Signal Description COM7 Common data signal : COM9. Connected to LCD signal COM9. COM6 Common data signal : COM10. Connected to LCD signal COM10. ABSOLUTE HUMIDITY SENSOR CIRCUIT With this voltage given, the switches SW1 to SW5 in the (1) Structure of Absolute Humidity Sensor LSI are turned on in such a way as to change the The absolute humidity sensor includes two thermistors...
  • Page 28 R - 5 3 0 E K R- 530EW TOUCH CONTROL PANEL SERVICING 4) Re-install the outer case (cabinet). 1. Precautions for Handling Electronic Components 5) Re-connect the power supply cord after the outer This unit uses CMOS LSI in the integral part of the case is installed.

  • Page 29: 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 30 R - 5 3 0 E K R- 530EW CAUTION: 1. DISCONNECT OVEN FROM POWER SUP PLY BEFORE REMOVING OUTER CASE. 2. DISCHARGE THE HIGH VOLTAGE CA- PACITOR BEFORE TOUCHING ANY OVEN COMPONENTS OR WIRING. Special screw NOTE: When replacing the outer case, the 2 special Torx screws must be reinstalled in the same locations.
  • Page 31 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 32 R - 5 3 0 E K R- 530EW COOLING FAN MOTOR REMOVAL REMOVAL CAUTION: 1. Disconnect the power supply cord and then remove * Do not reuse the removed fan blade because the outer case. hole (for shaft) may be larger than normal. 2.
  • Page 33 R - 5 3 0 E K R- 530EW interlock/monitor switches are in the lower position and 3. Secure latch hook (with two (2) mounting screws) to the door sensing switch is in the upper position. oven flange. 2. Re-connect wire leads to each switch. 4.
  • Page 34 R - 5 3 0 E K R- 530EW 13.Now, door panel is free. Note: The door on a microwave oven is designed to act as 14.Slide latch head upward and remove it from door frame an electronic seal preventing the leakage of by releasing latch spring from door frame and latch head.

  • Page 35: Pictorial Diagram

    R - 5 3 0 E K R- 530EW...

  • Page 36: Power Unit Circuit

    R - 5 3 0 E K R- 530EW CN-C 12PIN LEAD WIRE HARNESS Q2 2SB1238 R4 27 R5 4.7k D1-D4 11ES1 CN-A 1SS270A 1SS270A – – R3 510 1/2w Q1 2SB1238 R2 680 1/2w SP1 PKM22EPT Q3 KRC243M BUZZER OVEN LAMP R6 3.3k TURNTABLE...

  • Page 37: Lsi Unit Circuit

    R - 5 3 0 E K R- 530EW COM8 COM8 COM7 COM6 COM5 COM4 COM3 COM2 COM15 COM1 SEG1 SEG39 SEG2 SEG3 SEG4 SEG5 SEG34 SEG6 COM13 SEG7 SEG33 SEG8 SEG32 COM12 SEG31 COM11 SEG9 SEG10 SEG30 COM10 SEG11 SEG29 COM9 SEG12...

  • Page 38: Printed Wiring Board

    R - 5 3 0 E K R- 530EW (CN - C) CN - C CN - B CN - A (J1) (CN - D) (D10) Figure S-4. Printed Wiring Board of Power Unit...

  • Page 39: Parts List

    RH-VZB001MRE0 Varistor (470ND-10D) (Interchangeable) VHEHZ161///-1 Zener diode (HZ16-1) 3- 2 DPWBFC167WRKZ LSI unit 3- 3 FPNLCB354/KIT Control panel frame assembly [R-530EK] 3- 3 FPNLCB355/KIT Control panel frame assembly [R-530EW] 3-3-1 FUNTKB297/KIT Key unit [R-530EK] 3-3-1 FUNTKB298/KIT Key unit [R-530EW] 3-3-2...
  • Page 40 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 41 R - 5 3 0 E K R- 530EW OVEN AND CABINET PARTS 1-10 1-15 4-11 1-14 1-11 6-11 4-10 1-12 1-13 4-13 4-12...
  • Page 42 R - 5 3 0 E K R- 530EW CONTROL PANEL PARTS DOOR PARTS 3-3-1 3-3-2 3-3-4 3-3-3 MISCELLANEOUS Actual wire harness may be different from illustration.

  • Page 43: Packing And Accessories

    TOP PAD ASSEMBLY PACKING AND ACCESSORIES FPADBB050MRE0 DOOR PROTECTION SHEET SPADP0221MRE0 PLASTIC BAG SSAKHB007MRE0 TRAY HOLDER SPADFB051MRE0 6-5 TURNTABLE TRAY 6-8 OPERATION MANUAL 6-10 RECIPE CARD 6-4 TURNTABLE SUPPORT BOTTOM PAD ASSEMBLY FPADBB051MRE0 TRAY PACK SPADPB042MRE0 PACKING CASE SPAKCB309MRR3 (R-530EK) SPAKCB309MRR2 (R-530EW)
  • Page 44 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. 2001 SHARP CORP. (3S2.530E) Printed in U.S.A...

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