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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