Service manual

R-1855A
S99M138R1855E
OVER THE RANGE
MICROWAVE OVEN
MODEL R-1855A
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.
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 .......................................................................................................................................... 1
MICROWAVE MEASUREMENT PROCEDURE .................................................................................................. 2
FOREWORD ........................................................................................................................................................ 4
PRODUCT SPECIFICATIONS............................................................................................................................. 5
GENERAL INFORMATION ................................................................................................................................. 5
OPERATION ........................................................................................................................................................ 7
TROUBLESHOOTING GUIDE ............................................................................................................................17
TEST PROCEDURE ...........................................................................................................................................20
TOUCH CONTROL PANEL ................................................................................................................................31
COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE ................................................................37
PICTORIAL DIAGRAM .......................................................................................................................................46
CONTROL PANEL CIRCUIT ..............................................................................................................................47
PRINTED WIRING BOARD ................................................................................................................................48
PARTS LIST ........................................................................................................................................................49
PACKING AND ACCESSORIES.........................................................................................................................55
This model for the US and Canada markets, Please refer to the appropriate pages for service information.
SHARP CORPORATION
SHARP ELECTRONICS OF CANADA LTD.
Head Office: 335 Britannia Road East, Mississauga, Ontario L4Z 1W9
[phone]
Service Headquarters: Sharp Plaza, Mahwah, New Jersey, 07430-2135
This document has been published to be used for after sales service only. The contents are subject to
change without notice.
SHARP ELECTRONICS CORPORATION
OR: