Sharp R-1874

R-1874
SUPPLEMENTAL SERVICE MANUAL
TABLE OF CONTENTS
Page
PRECAUTIONS TO BE OBSERVED BEFORE AND DURING SERVICE TO
AVOID POSSIBLE EXPOSURE TO EXCESSIVE MICROWAVE ENERGY ................... INSIDE FRONT COVER
BEFORE SERVICING ...................................................................................................... INSIDE FRONT COVER
MICROWAVE MEASUREMENT PROCEDURE.....................................................................................................1
WARNING TO SERVICE PERSONNEL..........................................................................................................3
FOREWORD ..........................................................................................................................................................4
PRODUCT SPECIFICATIONS...............................................................................................................................5
GENERAL INFORMATION ...................................................................................................................................5
PICTORIAL DIAGRAM ..........................................................................................................................................7
CONTROL PANEL CIRCUIT ..................................................................................................................................8
PARTS LIST..........................................................................................................................................................9
PACKING AND ACCESSORIES .........................................................................................................................15
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
OR:
SHARP CORPORATION
SHARP ELECTRONICS OF CANADA LTD.
Head Office: 335 Britannia Road East, Mississauga, Ontario L4Z 1W9
(905) 890-2100
This is a supplemental Service Manual for Model R-1874.
This model is quite similar to Base Model R-1855A (S/M# S01M177R1875E).
Use this supplemental manual together with the Base Model Service Manual 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..)
S52M187R1874E
OVER THE RANGE
MICROWAVE OVEN
MODEL R-1874
(IN USA):
(IN CANADA):
MIX CONV
DEFROST
SENSOR
TURNTABLE ON OFF COOK LBS OZ KG HELP

Sharp R-1874 Specifications

General

Capacity	1.1 cu. ft.
Weight	26.5 lbs
Cooking Levels	10
Defrost Function	Yes
Child Safety Lock	Yes
Power	1000 watts
Features	Sensor Cooking
Wattage	1000 watts
Control Type	Electronic Touch Control

Summary

Warning to Service Personnel

Microwave Energy Exposure Precautions

Before Servicing (USA)

Procedure for microwave emission checks and contact information for USA service.

Before Servicing (Canada)

Procedure for microwave emission checks and contact information for Canada service.

Microwave Measurement Procedure (USA)

Requirements

Specifies leakage limits and interlock switch requirements for USA.

Preparation for Testing

Outlines the necessary steps and materials for performing leakage tests.

Leakage Test

Details the closed-door leakage test method and measurement points.

Microwave Measurement Procedure (Canada)

Requirements and Preparation

Specifies leakage limits and details preparation steps for testing.

Leakage Testing Procedures

Covers tests with enclosure, without enclosure, and no load.

Service Personnel Safety Procedures

Before Servicing

Steps to disconnect power, discharge capacitor, and prepare for servicing.

After ServicingRepairing

Steps for reconnecting components and verifying repairs.

Foreword

General Service Warnings

General Safety Precautions

Safety warnings regarding door seals and interlocks during servicing.

High Voltage Danger

Alerts service personnel to the risk of electrical shock from specific parts.

Specifications and Grounding

Specifications

Lists detailed technical specifications for the microwave oven.

Grounding Instructions

Explains the importance and procedure of proper grounding.

Electrical Requirements and Oven Diagram

Electrical Requirements

Details the oven's power requirements and grounding plug.

Oven Diagram

Illustrates the external components of the microwave oven.

Pictorial Diagram

Touch Control Panel Circuit

Parts List - Electric, Cabinet, and Control Panel

Electric Parts

Lists electrical components with part numbers and descriptions.

Cabinet Parts

Lists external and structural components of the oven.

Control Panel Parts

Lists components related to the oven's control interface.

Parts List - Oven, Hardware, and Ordering

Oven Parts

Lists various internal and external oven components.

Screws, Nuts, and Washers

Details fasteners and hardware used in the oven assembly.

How to Order Replacement Parts

Provides instructions for ordering necessary replacement parts.

Parts List - Door and Miscellaneous

Door Parts

Lists all components specific to the oven door assembly.

Miscellaneous

Includes installation materials, manuals, and labels.

Packing and Accessories