Sharp R-1870 Service Manual Supplement
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Sharp R-1870 Service Manual Supplement

Over the range microwave oven
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See also: Operating Manual
SUPPLEMENTAL SERVICE MANUAL
This is a supplemental Service Manual for Models R-1870/R1871.
This model is quite similar to Base Model R-1850 (S/M# S6804R1850X//).
Use this supplemental manual together with the Base Model Service Manuals for complete operation and service information
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 contain 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 Rectifier Assembly, High Voltage Harness etc..)
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
COMPONENT TEST ............................................................................................................................................. 9
PICTORIAL DIAGRAM ........................................................................................................................................ 10
LSI UNIT CIRCUIT ............................................................................................................................................... 11
PARTS LIST ........................................................................................................................................................ 12
PACKING AND ACCESSORIES ......................................................................................................................... 18
SHARP ELECTRONICS CORPORATION
Service Headquarters: Sharp Plaza, Mahwah, New Jersey, 07430-2135
MODELS
Model R-1870

TABLE OF CONTENTS

This document has been published to be used for after
sales service only.
The contents are subject to change without notice.
OVER THE RANGE
MICROWAVE OVEN
R-1870/R-1871
R-1870
R-1871
S91M173R1870E
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Summary of Contents for Sharp R-1870

  • Page 1: Table Of Contents

    MODELS Model R-1870 This is a supplemental Service Manual for Models R-1870/R1871. This model is quite similar to Base Model R-1850 (S/M# S6804R1850X//). Use this supplemental manual together with the Base Model Service Manuals for complete operation and service information 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.

  • 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 - 1 8 7 0 R - 1 8 7 1 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-...

  • Page 4: Microwave Measurement Procedure

    R - 1 8 7 0 R - 1 8 7 1 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

    Service Personnel with Operation and Service Information for the SHARP TROUBLESHOOTING GUIDE AND MICROWAVE OVEN, R-1870 and R-1871. TEST PROCEDURE The models R-1870 and R-1871 are quite similar to base model R-1850 (Ref.# S6804R1850X//) TOUCH CONTROL PANEL It is recommended that service personnel carefully study the entire text of this manual and the base model's manual so that they will be qualified to render satisfactory customer service.

  • Page 6: Product Specifications

    R - 1 8 7 0 R - 1 8 7 1 SPECIFICATION ITEM DESCRIPTION Power Requirements 120 Volts / 13.2 Amperes (Microwave), 13.2 Amperes (Convection) 60 Hertz Single phase, 3 wire grounded Power Output 850 watts (IEC-705 TEST PROCEDURE) Operating frequency of 2450MHz Convection Power Output 1400 watts...

  • Page 7: Oven Diagram

    R - 1 8 7 0 R - 1 8 7 1 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 branch circuit, using a grounded receptacle.

  • Page 8: Operation

    If the primary switch, secondary switch and secondary 1. The display will show SHARP, SIMPLY, THE, BEST, interlock relay fail with their contacts closed when the door PRESS, CLEAR, and PRESS, CLOCK.
  • Page 9 R - 1 8 7 0 R - 1 8 7 1 SCHEMATIC NOTE: CONDITION OF OVEN 1. DOOR CLOSED. 2. CLOCK APPEARS ON DISPLAY. FUSE MAGNETRON TEMPERATURE FUSE COM. N.O. CONTROL UNIT AH SENSOR HOOD FAN POWER THERMAL TRANSFORMER CUT OUT NOISE RESISTOR...
  • Page 10 R - 1 8 7 0 R - 1 8 7 1 SCHEMATIC NOTE: CONDITION OF OVEN 1. DOOR CLOSED. 2. CONVECTION PAD TOUCHED. 3. DESIRED TEMP. TOUCHED. 4. START PAD TOUCHED. FUSE MAGNETRON TEMPERATURE FUSE COM. N.O. CONTROL UNIT AH SENSOR HOOD FAN POWER...

  • Page 11: Component Test

    R - 1 8 7 0 R - 1 8 7 1 PROCEDURE COMPONENT TEST LETTER Note: When defective components, the Control Unit or Key Unit are replaced, the defective part or parts must be properly packed for return in the shipping carton, with its cushion material, in which the new replacement part was shipped to you.

  • Page 12: Pictorial Diagram

    AH. SENSOR HOOD FAN MOTOR 2 RED CN-F Power Supply cord 120V 60Hz CN-E TEMPERATURE FUSE (MG.) N.O. STIRRER MOTOR to oven cavity COM. CONVECTION front flange DOOR SENSING SWITCH RY2: PRIMARY MOTOR INTERLOCK RELAY HEATING ELEMENT Blue COM. Marking MONITOR CN-G FUSE AND...

  • Page 13: Lsi Unit Circuit

    CONTROL UNIT NOTE D1-D4 : 11ES1 : IF NOT SPECIFIEED, 1/4w AC120V : IF NOT SPECIFIEED, 1SS270A 60Hz DTA123ES : IF NOT SPECIFIEED, 0.01 F/16v – – C10 0.1 /50v (VP) C100 Q1 2SB1238 R4 510 1/2w MOTOR RUN R3 680 1w R90 100k CAPACITOR KRA101M...

  • Page 14: Parts List

    Outer case cabinet [R-1870] 2- 5 GCABUB107MRP0 Outer case cabinet [R-1871] 2- 6 TMAPCB056MRR0 Schematic diagram 2- 7 FANGKB009MRY0 Hood lamp glass assembly [R-1870] 2- 7 FANGKB010MRY0 Hood lamp glass assembly [R-1871] 2-7-1 LANGQB033MRP0 Hood lamp glass angle [R-1870] 2-7-1 LANGQB020MRP0...
  • Page 15 Zener diode (HZ6A-3) VHEHZ161///-1 Zener diode (HZ16-1) VHEHZ5C2///-1 Zener diode (HZ5C-2) VHEHZ4A2///-1 Zener diode (HZ4A-2) 3- 2 FPNLCB377MRK0 Control panel sub. assembly [R-1870] 3- 2 FPNLCB378MRK0 Control panel sub. assembly [R-1871] 3- 2-1 FUNTKB324MRE0 Key unit [R-1870] 3- 2-1 FUNTKB323MRE0...
  • Page 16 4-50 PCUSUB047MRP0 Cushion 4-51 PFPF-B004MRE0 Heat protect rear 4-52 PFPF-B005MRE0 Heat protect bottom DOOR PARTS CDORFB285MRK0 Door assembly, complete [R-1870] CDORFB286MRK0 Door assembly, complete [R-1871] 5- 1 DDORFB074MRY0 Door panel assembly 5- 2 GWAKPB140MRF0 Door frame [R-1870] 5- 2 GWAKPB141MRF0...
  • Page 17 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 authrized SHARP parts Distributor for your area. Defective parts required return should be returned as indicated in the Service Policy.
  • Page 18 R - 1 8 7 0 R - 1 8 7 1 OVEN AND CABINET PARTS 1-17 7-25 4-49 7-24 7-24 4-48 2-10 4-38 4-50 4-45 4-15 7-11 4-35 4-24 7-24 7-24 4-36 1-21 4-23 7-11 4-39 4-44 7-17 1-13 4-37 7-11 7-17...
  • Page 19 R - 1 8 7 0 R - 1 8 7 1 CONTROL PANEL PARTS 3-2-2 3-2-6 DOOR PARTS 3-2-1 4-34 3-2-5 3-2-4 3-2-3 MISCELLANEOUS 6-1-1 6-1-4 6-1-5 6-1-2 6-1-6 6-1-7 6-1-3 6-10 6-11...

  • Page 20: Packing And Accessories

    R - 1 8 7 0 R - 1 8 7 1 PACKING AND ACCESSORIES GREASE FILTER (x 2) 6-4 TOP TEMPLATE WALL TEMPLATE INSTALLATION INSTRUCTION 6-7 COOK BOOK OPERATION MANUAL INSTALL MATERIAL ASSEMBLY TOP PAD EXHAUST DAMPER ASSEMBLY 4-3 TURNTABLE TRAY DOOR PROTECTOR 6-10 WRAP COVER...
  • Page 21 R - 1 8 7 0 R - 1 8 7 1 Notes...
  • Page 22 R - 1 8 7 0 R - 1 8 7 1 Notes...
  • Page 23 R - 1 8 7 0 R - 1 8 7 1 Notes...
  • Page 24 No part of this publication may be reproduced, stored in retrieval systems, or transmitted in any form or by any means, electronic, me- chanical, photocopying, recording, or other- wise, without prior written permission of the publisher. '01 SHARP CORP. (9M2.60E) Printed in U.S.A...

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R-1871

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