1
R - 5 20L K
R- 5 20LW
In the interest of user-safety the oven should be restored to its original condition and only parts identical to those specifi ed 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 Rectifi er 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 ................................................................................................................. 3
MICROWAVE MEASUREMENT PROCEDURE ..................................................................................................... 4
FOREWORD AND WARNING ............................................................................................................................... 5
PRODUCT SPECIFICATIONS ............................................................................................................................... 6
GENERAL INFORMATION.................................................................................................................................... 6
OPERATION ........................................................................................................................................................... 8
TROUBLESHOOTING GUIDE ............................................................................................................................. 12
TEST PROCEDURE ............................................................................................................................................ 13
TOUCH CONTROL PANEL .................................................................................................................................. 23
COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE................................................................. 29
PICTORIAL DIAGRAM ......................................................................................................................................... 36
CONTROL UNIT CIRCUIT ................................................................................................................................... 37
PRINTED WIRING BOARD .................................................................................................................................. 38
PARTS LIST ........................................................................................................................................................ 39
PACKING AND ACCESSORIES .......................................................................................................................... 43
S46M260R520LE
R-520LK
R-520LW
MICROWAVE OVEN
MODELS
SERVICE MANUAL
SHARP ELECTRONCS 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
R-520LW
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