Sharp R-508DK Service Manual
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Sharp R-508DK Service Manual

Sharp R-508DK Service Manual

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R-510DW
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
LSI UNIT CIRCUIT ............................................................................................................................................... 30
PRINTED WIRING BOARD ................................................................................................................................. 32
PARTS LIST ........................................................................................................................................................ 33
PACKING AND ACCESSORIES ......................................................................................................................... 37
SHARP CORPORATION
SERVICE MANUAL
MODELS
NO.
LBS.
CUPS.
COOK
DEFOST
OZ.
MINUTE PLUS
BEVERAGE
POPCORN
INSTANT ACTION
TO ADJUST QUANTITY - TOUCH PAD AGAIN
DINER
ROLLS&
CASSEROLE
PLATE
MUFFINS
BAKED
FRESH
GROUND
POTATOES
VEGETABLES
MEAT
FROZEN
FROZEN
M ICROWAVE
ENTREES
VEGETABLES
PIZZA
1 GROUND MEAT
2 STEAKS/CHOPS
3 CHICKEN PIECES
COMPU DEFROST
1
2
3
4
5
6
7
8
9
POWER
0
TIMER
LEVEL
CLOCK
STOP
START
CLEAR
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

MICROWAVE OVEN
R-508DK
R-510DK
R-510DW
This document has been published to be used for after
sales service only.
The contents are subject to change without notice.
R - 50 8 DK
R - 5 10 DK
R -510 DW
S1003R510DUW/
Page

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  • Page 1: Table Of Contents

    R - 50 8 DK R - 5 10 DK R -510 DW SERVICE MANUAL S1003R510DUW/ MICROWAVE OVEN R-508DK MODELS R-510DK LBS. CUPS. COOK DEFOST MINUTE PLUS BEVERAGE POPCORN INSTANT ACTION TO ADJUST QUANTITY - TOUCH PAD AGAIN DINER ROLLS&...

  • 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 -508DK R -510DK R-510DW 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 - 50 8 D K R - 5 10 D K R -51 0DW 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...

  • Page 5: Foreword And Warning

    MICROWAVE OVEN R-508DK/ R-510DK/ R-510DW 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-508DK, R-510DK, R-510DW. 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 - 50 8 D K R - 5 10 D K R -51 0DW 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

    TIMER POWER POWER TIMER LEVEL CLOCK oven is not in use. These features LEVEL CLOCK are automatically enabled when STOP STOP the door is opened and closed or START START CLEAR CLEAR the STOP/ CLEAR pad is pressed. R-508DK R-510DW/DK...

  • Page 8: Operation

    R - 50 8 D K R - 5 10 D K R -51 0DW 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.

  • Page 9: Oven Schematic-Off Condition

    R -508DK R -510DK R-510DW SCHEMATIC NOTE: CONDITION OF OVEN 1. DOOR CLOSED. 2. CLOCK APPEARS ON DISPLAY. NOTE: Indicates components with potential above 250 V. MAGNETRON MONITOR TEMP. FUSE 20A FUSE COM. N.O. CAPACITOR 1.0µF AC 2300V (RY-2) (RY-1) PRIMARY INTERLOCK RELAY...

  • Page 10: Description And Function Of Components

    R - 50 8 D K R - 5 10 D K R -51 0DW 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 11: Troubleshooting Guide

    R -508DK R -510DK R-510DW 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 - 50 8 D K R - 5 10 D K R -51 0DW CK = Check / RE = Replace RE RE A B C D E E F F G H RE RE CK I CK CK CK J K L M TEST PROCEDURE PROBLEM CONDITION...
  • Page 13 R -508DK R -510DK R-510DW 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.
  • Page 14 R - 50 8 D K R - 5 10 D K R -51 0DW 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.
  • Page 15 R -508DK R -510DK R-510DW TEST PROCEDURES PROCEDURE COMPONENT TEST LETTER CAUTION: IF THE TEMPERATURE FUSE INDICATES AN OPEN CIRCUIT AT ROOM TEMPERA- TURE, REPLACE TEMPERATURE FUSE. SECONDARY INTERLOCK SWITCH TEST 1. Disconnect the power supply cord, and then remove outer case. 2.
  • Page 16 R - 50 8 D K R - 5 10 D K R -51 0DW 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 Screw Driver cord after the outer case is installed.
  • Page 17 BEVERAGE CLEAR VEGETABLES POTATOES (either close the door or short the door sensing switch connecter). Use the Key unit matrix indicated on the control panel schematic and place a jumper wire between the pins that R-508DK...
  • Page 18 R - 50 8 D K R - 5 10 D K R -51 0DW TEST PROCEDURES PROCEDURE COMPONENT TEST LETTER correspond to the STOP/CLEAR pad making momentary contact. If the control unit responds by clearing with a beep the key unit is faulty and must be replaced. If the control unit does not respond, it is faulty and must be replaced.
  • Page 19 R -508DK R -510DK R-510DW TEST PROCEDURES PROCEDURE COMPONENT TEST LETTER (6) 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 20: Touch Control Panel

    R - 50 8 D K R - 5 10 D K R -51 0DW 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 -508DK R -510DK R-510DW Pin No. Signal Description Back light circuit (Light emitting diodes) driving signal. 12-13 P56-P55 Terminal not used. CNTR0 Signal to sound buzzer (2.0 kHz). 0.1 sec. H : GND A: key touch sound. L : -5V B: Completion sound.
  • Page 22 R - 50 8 D K R - 5 10 D K R -51 0DW 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 G8 line keys on key matrix is touched. Key strobe signal.
  • Page 23 R -508DK R -510DK R-510DW TOUCH CONTROL PANEL SERVICING repair all the controls (sensor-related ones included) of 1. Precautions for Handling Electronic Components the touch control panel while keeping it connected to the This unit uses CMOS LSI in the integral part of the oven.

  • 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: Magnetron Removal

    R -508DK R -510DK R-510DW 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 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 -508DK R -510DK R-510DW 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 28 R - 50 8 D K R - 5 10 D K R -51 0DW forth, and up and down. In and out play of the door 3. Monitor switch contacts close when door is opened. allowed by the upper and lower position of the latch hook 4.
  • Page 29 R -508DK R -510DK R-510DW Note: The door on a microwave oven is designed to act as an electronic seal preventing the leakage of microwave energy from oven cavity during cook cycle. This function does not require that door be air- tight, moisture (condensation)-tight or light-tight.

  • Page 30: Pictorial Diagram

    R - 50 8 D K R - 5 10 D K R -51 0DW...

  • Page 31: Power Unit Circuit

    R -508DK R -510DK R-510DW CN-C S1NB10 9PIN LEAD WIRE HARNESS CN-A – OVEN LAMP TURNTABLE BUZZER MOTOR FAN MOTOR OVEN LAMP TURNTABLE MOTOR FAN MOTOR MICRO MICRO (BROWNER) SH-A DOOR SENSING SWITCH SH-B DOOR...

  • Page 32: Lsi Unit Circuit

    R - 50 8 D K R - 5 10 D K R -51 0DW...
  • Page 33 R -508DK R -510DK R-510DW...

  • Page 34: Printed Wiring Board

    R - 50 8 D K R - 5 10 D K R -51 0DW SW (GREEN) CN - C SH - B SH - A CN - B (D3) (D4) TTM FM BROWNER MICRO Figure S-5 . Printed Wiring Board of Power Unit...

  • Page 35: Parts List

    FPNLCB293MRK0 Control panel frame with key unit [R-510DK] 3- 2 FPNLCB294MRK0 Control panel frame with key unit [R-510DW] 3- 2 FPNLCB295MRK0 Control panel frame with key unit [R-508DK] 3- 2-1 FUNTKB238MRE0 Key unit [R-510DK] 3- 2-1 FUNTKB239MRE0 Key unit [R-510DW]...
  • Page 36 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 37: Oven And Cabinet Parts

    R -508DK R -510DK R-510DW OVEN AND CABINET PARTS 7-10 7-10 1-10 4-11 1-14 1-11 4-10 1-12 1-13 7-11 4-13 4-12...
  • Page 38 R - 50 8 D K R - 5 10 D K R -51 0DW CONTROL PANEL PARTS DOOR PARTS 3-3-1 3-3-3 3-3-2 MISCELLANEOUS 5-1-1 5-1-2 Actual wire harness may be different from illustration.

  • Page 39: Packing And Accessories

    PACKING AND ACCESSORIES TOP PAD ASSEMBLY FPADBB038MRE0 DOOR PROTECTION SHEET SPADP0221MRE0 PLASTIC BAG SSAKHB007MRE0 TRAY HOLDER SPADFB051MRE0 6-5 TURNTABLE TRAY 6-8 OPERATION MANUAL 6-4 TURNTABLE SUPPORT BOTTOM PAD ASSEMBLY FPADBB039MRE0 TRAY PACK SPADPB042MRE0 PACKING CASE SPAKCB278MRE0 (R-508DK) SPAKCB276MRE0 (R-510DK) SPAKCB277MRE0 (R-510DW)
  • Page 40 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. '20 SHARP CORP. (2S2.530E) Printed in U.S.A...

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