Sharp R-1870 - Manual

Sharp R-1870

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Table of Contents:

  • Page 2 – performed on each oven prior to release to the owner.; BEFORE SERVICING; . The owner of the unit should be instructed not to use the unit
  • Page 3 – WARNING TO SERVICE PERSONNEL; may result in a severe, possibly; When the testing is completed,; After repairing; Before Servicing
  • Page 4 – MICROWAVE MEASUREMENT PROCEDURE; should not exceed 1mW/cm
  • Page 5 – SERVICE MANUAL; DANGER; Removal of the outer wrap gives access to voltage above 250V.
  • Page 6 – SPECIFICATION; GROUNDING INSTRUCTIONS
  • Page 7 – CONTROL PANEL; OVEN DIAGRAM
  • Page 8 – OPERATION; DESCRIPTION OF OPERATING SEQUENCE; OFF CONDITION
  • Page 10 – NOTE: RY2 and RY3 will alternately close during cook cycle
  • Page 14 – PARTS LIST; DESCRIPTION
  • Page 15 – OVEN PARTS
  • Page 16 – DOOR PARTS
  • Page 17 – HOW TO ORDER REPLACEMENT PARTS; SCREWS,NUTS AND WASHERS
  • Page 18 – OVEN AND CABINET PARTS
  • Page 21 – Notes
  • Page 24 – COPYRIGHT © 2001 BY SHARP CORPORATION
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R-1870
R-1871

S91M173R1870E

OVER THE RANGE

MICROWAVE OVEN

MODELS

R-1870/R-1871

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

Model R-1870

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..)

TABLE OF CONTENTS

Page

PRECAUTIONS TO BE OBSERVED BEFORE AND DURING SERVICING TO
AVOID POSSIBLE EXPOSURE TO EXCESSIVE MICROWAVE ENERGY ................... INSIDE FRONT COVER
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

This document has been published to be used for after

sales service only.

The contents are subject to change without notice.

Service Headquarters: Sharp Plaza, Mahwah, New Jersey, 07430-2135

SUPPLEMENTAL SERVICE MANUAL

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Summary

Page 2 - performed on each oven prior to release to the owner.; BEFORE SERVICING; . The owner of the unit should be instructed not to use the unit

R-1870R-1871 PRECAUTIONS TO BE OBSERVED BEFORE ANDDURING SERVICING TO AVOID POSSIBLEEXPOSURE TO EXCESSIVE MICROWAVEENERGY (a) Do not operate or allow the oven to be operated with the door open.(b) Make the following safety checks on all ovens to be serviced before activating the magnetron or other m...

Page 3 - WARNING TO SERVICE PERSONNEL; may result in a severe, possibly; When the testing is completed,; After repairing; Before Servicing

1 R - 1 8 7 0R - 1 8 7 1 WARNING TO SERVICE PERSONNEL Microwave ovens contain circuitry capable of pro-ducing very high voltage and current, contact withfollowing parts may result in a severe, possibly fatal, electrical shock. (Example) High Voltage Capacitor, High Voltage Power Trans-former, Magnet...

Page 4 - MICROWAVE MEASUREMENT PROCEDURE; should not exceed 1mW/cm

2 R - 1 8 7 0R - 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 2 at any point 5cm or more from the external surface of the oven, measured prior t...

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