Sharp R-1870 service manual Danger, Sharp Plaza, Mahwah New Jersey, Service Manual

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SERVICE MANUAL

SERVICE MANUAL

MICROWAVE OVEN

R-1870/R1871

FOREWORD

This Manual has been prepared to provide Sharp Electronics Corp. Service Personnel with Operation and Service Information for the SHARP MICROWAVE OVEN, R-1870 and R-1871.

The models R-1870 and R-1871 are quite similar to base model R-1850 (Ref.# S6804R1850X//)

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.

Check the interlock switches and the door seal carefully. Special attention should be given to avoid electrical shock and microwave radiation hazard.

WARNING

Never operate the oven until the following points are ensured:

(A)The door is tightly closed.

(B)The door brackets and hinges are not defective.

(C)The door packing is not damaged.

(D)The door is not deformed or warped.

(E)There is no other visible damage with the oven.

Servicing and repair work must be carried out only by trained service personnel.

DANGER

Certain initial parts are intentionally not grounded and present a risk of electrical shock only during servicing. Service person- nel - Do not contact the following parts while the appliance is energized;

High Voltage Capacitor, Power Transformer, Magnetron, High Voltage Rectifier Assembly, High Voltage Harness;

If provided, Vent Hood, Fan assembly, Cooling Fan Motor.

All the parts marked “*” on parts list are used at voltages more than 250V.

Removal of the outer wrap gives access to voltage above 250V.

SHARP ELECTRONICS CORPORATION

SHARP PLAZA, MAHWAH,

NEW JERSEY 07430-2135

R - 1 8 7 0

R - 1 8 7 1

PRODUCT DESCRIPTION

GENERALINFORMATION

OPERATION

TROUBLESHOOTING GUIDE AND TEST PROCEDURE

TOUCH CONTROL PANEL

COMPONENT REPLACEMENT ANDADJUSTMENTPROCEDURE

WIRINGDIAGRAM

PARTS LIST

3

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Contents TABLE OF CONTENTS SHARP ELECTRONICS CORPORATION sales service onlySUPPLEMENTAL SERVICE MANUAL Service Headquarters Sharp Plaza, Mahwah, New JerseyBEFORE SERVICING After repairing WARNING TO SERVICE PERSONNELDont Touch Danger High Voltage Before ServicingB. Preparation for testing MICROWAVE MEASUREMENT PROCEDUREA. Requirements C. Leakage testSHARP PLAZA, MAHWAH NEW JERSEY DANGERSERVICE MANUAL If provided, Vent Hood, Fan assembly, Cooling Fan MotorGENERAL INFORMATION SPECIFICATIONDESCRIPTION GROUNDING INSTRUCTIONSOVEN DIAGRAM OPERATION POWER LEVEL P-0 TO P-90 COOKINGDESCRIPTION OF OPERATING SEQUENCE OFF CONDITIONFigure O-1. Oven Schematic - Off Condition Figure O-2. Oven Schematic - Microwave Cooking ConditionNOTE RY2 and RY3 will alternately close during cook cycle Figure O-4. Oven Schematic - Automatic Mix cooking ConditionLETTER PROCEDURECOMPONENT TEST R KEY UNIT TESTHIGH VOLTAGE COMPONENTS Figure S-1. Pictorial Diagram8 7 0 8 7 R - 1 RR - 1 8 7 0 R - 1 8 7 Figure S-2. Touch Control Panel CircuitNote The parts marked “∆” may cause undue microwave exposure PARTS LISTELECTRIC PARTS CABINET PARTSCODE OVEN PARTSMISCELLANEOUS DOOR PARTSOrder Parts from the authrized SHARP parts Distributor for your area HOW TO ORDER REPLACEMENT PARTSSCREWS,NUTS AND WASHERS OVEN AND CABINET PARTS DOOR PARTS 6-2 INSTALLATION INSTRUCTION 6-7 COOK BOOK 6-3 OPERATION MANUAL PACKING AND ACCESSORIES6-1 INSTALL MATERIAL ASSEMBLY 4-1 EXHAUST DAMPER ASSEMBLY ACCESSORY PACK BOTTOM PADR - 1 8 7 R - 1 8 7 R - 1 8 7 R - 1 8 7 R - 1 8 7 R - 1 8 7 01 SHARP CORP. 9M2.60E Printed in U.S.A COPYRIGHT 2001 BY SHARP CORPORATION ALL RIGHTS RESERVED
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R-1870 specifications

The Sharp R-1870, R-1871, R-1870BK, and R-1872 microwaves are advanced kitchen appliances designed for efficiency and convenience in meal preparation. These models are known for their innovative features and technologies that enhance everyday cooking.

One of the standout features of these microwaves is the integration of inverter technology. This groundbreaking technology allows for a consistent and even distribution of heat, ensuring that food is cooked thoroughly without overcooking or uneven hot spots. Unlike traditional microwave ovens, inverter technology provides a continuous power output, which is particularly beneficial for delicate foods like seafood, sauces, and sweets.

Another notable characteristic of the Sharp R-1870 series is its spacious interior. With a generous capacity, these microwaves can accommodate large dishes, making them ideal for family meals or batch cooking. The flexible turntable adjustment allows users to maximize interior space for various dish sizes.

The R-1870 series also features sensor cooking technology. This intelligent system detects moisture released by the food during cooking and automatically adjusts cooking times and power levels. This ensures optimal cooking results without the need for constant monitoring, saving time and effort in the kitchen.

User convenience is further enhanced by the user-friendly control panel, which includes pre-programmed settings for popular dishes. This simplifies the cooking process, allowing users to prepare meals with the push of a button. The models also feature a large, easy-to-read display that shows cooking settings and times, making operation straightforward.

In terms of design, the Sharp R-1870 models come in various finishes, including sleek black and stainless steel options, to complement modern kitchen aesthetics. The units are compact, making them suitable for countertops with limited space.

Safety features, such as child lock functionality and a time countdown, are also integral to the design of these microwaves. This adds peace of mind for families with young children or for those who multitask in the kitchen.

All in all, the Sharp R-1870, R-1871, R-1870BK, and R-1872 microwaves represent a fusion of technology and practicality, catering to the needs of today’s busy home cooks. With their inverter cooking capabilities, sensor technology, and spacious designs, these models are a smart addition to any kitchen, making meal preparation easier and more enjoyable.