Sharp R-1505F Service Manual
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Sharp R-1505F Service Manual

Over the range microwave oven
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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 .......................................................................................................................................................... 7
TROUBLESHOOTING GUIDE ............................................................................................................................ 11
TEST PROCEDURE ............................................................................................................................................ 13
TOUCH CONTROL PANEL ASSEMBLY ............................................................................................................ 21
COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE ................................................................ 25
PICTORIAL DIAGRAM ........................................................................................................................................ 33
POWER UNIT CIRCUIT ...................................................................................................................................... 34
LSI UNIT CIRCUIT ............................................................................................................................................... 35
PRINTED WIRING BOARD ................................................................................................................................. 36
PARTS LIST ........................................................................................................................................................ 37
PACKING AND ACCESSORIES ......................................................................................................................... 39
SHARP CORPORATION
SERVICE MANUAL
OVER THE RANGE
MICROWAVE OVEN
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 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.
R-1500
R-1501
R-1505
R-1506
R-1500
R-1501
R-1505
R-1506
S8123R1500X//
Page

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  • Page 1: Table Of Contents

    LSI UNIT CIRCUIT ............................... 35 PRINTED WIRING BOARD ..........................36 PARTS LIST ................................ 37 PACKING AND ACCESSORIES ......................... 39 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-1500 R-1501 R-1505 R-1506 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-1500 R-1501 R-1505 R-1506 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-1500/ R-1501/ R-1505/ R-1506 GENERAL INFORMATION FOREWORD This Manual has been prepared to provide Sharp Electronics Corp. OPERATION Service Personnel with Operation and Service Information for the SHARP OVER THE RANGE MICROWAVE OVEN, R-1500, R-1501 R-1505 and R-1506.

  • Page 6: Product Specifications

    R-1500 R-1501 R-1505 R-1506 PRODUCT SPECIFICATION ITEM DESCRIPTION Power Requirements 120 Volts / 14 Amperes 60 Hertz Single phase, 3 wire grounded Power Output 1000 watts (IEC TEST PROCEDURE) Operating frequency of 2450MHz Case Dimensions Width 29-15/16" Height 16-1/4" Depth 15- 9/16" Cooking Cavity Dimensions Width 17-1/2"...

  • Page 7: Oven Diagram

    R-1500 R-1501 R-1505 R-1506 Electrical Requirements The oven is equipped with a 3-prong grounding plug. DO NOT UNDER ANY CIRCUMSTANCES CUT OR REMOVE THE GROUNDING PIN FROM THE PLUG. The power supply cord and plug must be connected to a separate 120 Volt AC, 60 Hz, 15 Amp. or more dedicated line, using a grounded receptacle.
  • Page 8 R-1500 R-1501 R-1505 R-1506 CONTROL PANEL 1 0 0 0 W A T T S LBS. CUPS COOK DEFROST KEEP POPCORN WARM WATER REHEAT CENTER 1 Casserole 5 Dinner Plate 2 Soup 6 Fresh Rolls / Muffins 3 Pizza 7 Frozen Rolls / Muffins 4 Beverage 8 Canned Vegetables LIGHT HI/ LO...

  • Page 9: Operation

    R-1500 R-1501 R-1505 R-1506 OPERATION DESCRIPTION OF OPERATING SEQUENCE The following is a description of component functions during relay (RY2) and is mechanically associated with the door oven operation. so that it will function in the following sequence. (1) When the door opens from a closed position, the OFF CONDITION secondary interlock relay (RY2) and primary interlock Closing the door activates the door sensing switch and...
  • Page 10 R-1500 R-1501 R-1505 R-1506 VENTILATION METHODS HOT AIR EXHAUST 1. VERTICAL VENTING For this venting method, hot air rising from the conventional range below is drawn in by the hood fan motor through the grease filters at the right and left sides of the base cover, up through the right and left sides of the oven cavity, then discharged vertically at rear center top of the oven, into the customer's vent system.
  • Page 11 R-1500 R-1501 R-1505 R-1506 SCHEMATIC NOTE: " " indicates components with potential above 250V. NOTE: CONDITION OF OVEN 1. DOOR CLOSED. CLOCK APPEARS ON DISPLAY. CAVITY MAGNETRON THERMAL CUT-OUT TEMPERATURE FUSE CONTROL UNIT N.O. COM. FUSE DOOR POWER SENSING TRANSFORMER SWITCH HOOD FAN THERMAL...
  • Page 12 R-1500 R-1501 R-1505 R-1506 DESCRIPTION AND FUNCTION OF COMPONENTS 3. If the door is opened, and the secondary interlock relay DOOR OPEN MECHANISM (RY2) and primary interlock switch contacts fail to open, The door is opened by pushing the open button on the the monitor fuse blows simultaneously with closing of the control panel, refer to the Figure D-1.

  • Page 13: Troubleshooting Guide

    R-1500 R-1501 R-1505 R-1506 is channelled through the oven cavity to remove steam and This air is then expelled either vertically or horizontally vapors given off from the heating foods. It is then exhausted through the customer supplied duct system, or discharged through the exhausting air vents at the oven cavity.
  • Page 14 R-1500 R-1501 R-1505 R-1506 CK = Check / RE = Replace CK LOW VOLTAGE CK NO POWER AT OUTLET RE SHORT IN POWER CORD CK OPENED OR SHORTED WIRING CK HOOD MOTOR CAPACITOR RE HOOD LAMP OR SOCKET RE TURNTABLE MOTOR RE FAN MOTOR RE OVEN LAMP OR SOCKET FOIL PATERN ON P.W.B.

  • Page 15: Test Procedure

    R-1500 R-1501 R-1505 R-1506 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. 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.
  • Page 16 R-1500 R-1501 R-1505 R-1506 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 17 R-1500 R-1501 R-1505 R-1506 TEST PROCEDURES PROCEDURE COMPONENT TEST LETTER 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. CAUTION: IF THE THERMAL CUT-OUT OR TEMPERATURE FUSE INDICATES AN OPEN CIRCUIT AT ROOM TEMPERATURE, REPLACE THERMAL CUT-OUT OR TEMPERATURE FUSE.
  • Page 18 R-1500 R-1501 R-1505 R-1506 TEST PROCEDURES PROCEDURE COMPONENT TEST LETTER plate of the oven cavity 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.
  • Page 19 R-1500 R-1501 R-1505 R-1506 TEST PROCEDURES PROCEDURE COMPONENT TEST LETTER Resistance between; BLU (1) AND YLW (4) = (Shorted) BLK (2) AND YLW (4) = 33 BLU (1) AND BLK (2) = 33 HOOD FAN CAPACITOR BLK (2) AND WHT (3) = 11 WHT (3) AND RED (5) = 22 6-PIN CONNECTOR BLU BLK...
  • Page 20 R-1500 R-1501 R-1505 R-1506 TEST PROCEDURES PROCEDURE COMPONENT TEST LETTER 8) Run the oven and check all functions. 2. Control Unit. The following symptoms indicate a defective control unit. Before replacing the control unit, perform the Key unit test (Procedure M) to determine if control unit is faulty. 2-1 In connection with pads.
  • Page 21 R-1500 R-1501 R-1505 R-1506 TEST PROCEDURES PROCEDURE COMPONENT TEST LETTER RELAY TEST 1. Disconnect the power supply cord, and then remove outer case. Refer to procedure of " HOOD EXHAUST LOUVER REMOVAL ", " REMOVAL OF OVEN FROM WALL " and " OUTER CASE REMOVAL ".
  • Page 22 R-1500 R-1501 R-1505 R-1506 TEST PROCEDURES PROCEDURE COMPONENT TEST LETTER 1. Foil pattern check and repairs. 1) Disconnect the power supply cord. 2) Open the door and block it open. 3) To discharge high voltage capacitor, wait for 60 seconds. 4) Remove the control unit, referring to the procedure of "...

  • Page 23: Touch Control Panel Assembly

    R-1500 R-1501 R-1505 R-1506 TOUCH CONTROL PANEL ASSEMBLY OUTLINE OF TOUCH CONTROL PANEL The touch control section consists of the following units Symbol Voltage Application as shown in the touch control panel circuit. -5.3V LSI(IC1) (1) Key Unit 3) Synchronizing Signal Circuit (2) Control Unit (The Control unit consists of LSI Unit and The power source synchronizing signal is available in Power U nit)
  • Page 24 R-1500 R-1501 R-1505 R-1506 Pin No. Signal Description Terminal not used. Oven lamp, fan motor and turntable motor driving signal To turn on and off shut off relay (RY1). The 16.7 msec. H : GND square waveform voltage is delivered to the RY1 driving circuit and RY2 control circuit.
  • Page 25 R-1500 R-1501 R-1505 R-1506 Pin No. Signal Description Key strobe signal. Signal applied to touch-key section. A pulse signal is input to P43-P46 terminal while one of G4 line keys on key matrix is touched. Key strobe signal. Signal applied to touch-key section. A pulse signal is input to P43-P46 terminal while one of G3 line keys on key matrix is touched.
  • Page 26 R-1500 R-1501 R-1505 R-1506 SERVICING 1. Precautions for Handling Electronic Components transformer. This unit uses CMOS LSI in the integral part of the 4) Re-install the outer case (cabinet). circuits. When handling these parts, the following 5) Re-connect the power supply cord after the outer case precautions should be strictly followed.

  • Page 27: 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 28 R-1500 R-1501 R-1505 R-1506 5. Pull the hood exhaust louver from the oven cavity by Left tab pushing the right and left tabs of the hood exhaust louver Hood exhaust louver to remove. Screw Right tab 6. Now, the hood exhaust louver is free. Screw Screw REMOVAL OF OVEN FROM WALL (Two persons recommended to remove the oven)
  • Page 29 R-1500 R-1501 R-1505 R-1506 4. Disconnect the 6-pin connector of the hood fan motor 5. Remove the hood fan motor from the oven cavity top from the main wire harness located at the right edge of plate by lifting it up. the oven cavity top plate and release the snap band from 6.

  • Page 30: Cooling Fan Motor Removal

    R-1500 R-1501 R-1505 R-1506 TEMPERATURE FUSE (MAGNETRON) REMOVAL 1. Disconnect the power supply cord and remove the oven referring to the procedure of " COOLING FAN MOTOR from wall and remove outer case. (Refer to procedure of REMOVAL". "Removal of Oven from Wall" and "Outer case Removal") 5.
  • Page 31 R-1500 R-1501 R-1505 R-1506 TURNTABLE MOTOR AND FOOD LAMP SOCKETS REMOVAL 1. Disconnect the power supply cord. TURNTABLE MOTOR 2. Open the door and block it open. 9. Disconnect the wire leads from the turntable motor. 3. To discharge the high voltage capacitor, wait for 60 10.Remove one (1) screw holding turntable motor to the seconds.
  • Page 32 R-1500 R-1501 R-1505 R-1506 13.Remove the two (2) screws holding the LCD holder to 2. Before attaching a new key unit, wipe off remaining the key fixing plate. adhesive on the key fixing plate surfaces completely with 14.Remove two (2) screws holding the power unit to the key a soft cloth soaked in alcohol.
  • Page 33 R-1500 R-1501 R-1505 R-1506 After adjustment, check the following. Latch heads 1. In and out play of door remains less than 0.5mm when in Latch hook the latched position. First check upper position of latch hook, pushing and pulling upper portion of door toward the oven face.
  • Page 34 R-1500 R-1501 R-1505 R-1506 DOOR DISASSEMBLY 1. Disconnect the power supply cord. DOOR FRAME ASSEMBLY 2. Open the door and block it open. 11.Remove two (2) screws holding the door panel to the 3. To discharge the high voltage capacitor, wait for 60 door frame assembly.

  • Page 35: Pictorial Diagram

    R-1500 R-1501 R-1505 R-1506...

  • Page 36: Power Unit Circuit

    R-1500 R-1501 R-1505 R-1506 D1-D4 1N4002 – R1 750 1w R2 750 1w – AC(N) 10 /35v OVEN LAMP OVEN LAMP TURNTABLE TURNTABLE MOTOR MOTOR FAN MOTOR FAN MOTOR KRC243M AC(H) BUZZER PKM22EPT MICRO. MICRO. HOOD MOTOR HIGH HOOD MOTOR HOOD HOOD MOTOR THERMAL...

  • Page 37: Lsi Unit Circuit

    R-1500 R-1501 R-1505 R-1506 SEG21 SEG20 SEG19 SEG18 SEG17 SEG16 SEG15 SEG14 SEG13 SEG12 SEG11 SEG10 SEG9 SEG8 SEG7 SEG7 SEG6 SEG6 SEG5 SEG5 SEG4 SEG4 SEG3 SEG3 SEG2 SEG2 SEG1 SEG1 SEG0 SEG0 COM2 VREF XOUT COM2(LCD) COM1 AVSS COM1(LCD) COM0 COM3...

  • Page 38: Printed Wiring Board

    R-1500 R-1501 R-1505 R-1506 CN-C CN-E CN-A CN-B Figure S-4. Printed Wiring Board...

  • Page 39: Parts List

    R-1500 R-1501 R-1505 R-1506 PARTS LIST Note: The parts marked “ ” may cause undue microwave exposure. The parts marked “*” are used in voltage more than 250V. " §" MARK: PARTS DELIVERY SECTION REF. NO. PART NO. § DESCRIPTION Q'TY CODE ELECTRIC PARTS 1- 1...

  • Page 40: Oven Parts

    R-1500 R-1501 R-1505 R-1506 REF. NO. PART NO. § DESCRIPTION Q'TY CODE RALM-A014DRE0 Buzzer (PKM22EPT) RTRNPB017MRE0 Transformer VRS1 RH-VZA032DRE0 Varistor (10G471K) 3- 2 FPNLCB372MRK0 Control panel sub. assembly [R-1500] 3- 2 FPNLCB373MRK0 Control panel sub, assembly [R-1501] 3- 2 FPNLCB372MRK0 Control panel sub.

  • Page 41: 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. 6-13 GREASE FILTER (x 2)
  • Page 42 R-1500 R-1501 R-1505 R-1506 OVEN AND CABINET PARTS 6-1-5 6-14 4-10 4-12 1-12 4-19 1-14 4-17 4-16 4-18 4-13 4-17 6-10 6-12 4-16 1-15 4-20 4-13 4-15 4-11 1-16 1-13 7-10 1-10 1-11 4-21 1-11 4-14 4-22 1-10 1-13 1-16 6-13 2-7-2 6-13...
  • Page 43 R-1500 R-1501 R-1505 R-1506 CONTROL PANEL PARTS 3-2-1 DOOR PARTS 3-2-3 3-2-2 3-2-4 5-2-3 5-2-3 5-2-1 5-2-2 MISCELLANEOUS 6-1-1 6-1-4 6-1-5 6-1-2 6-1-6 6-11 6-1-7 6-1-3 6-1-8...
  • 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 permis- sion of the publisher. '01 SHARP CORP. (8S1.730E) Printed in U.S.A...

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R-1505R-1500R-1501R-1506

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