In the interest of user-safety the unit should be restored to its original condition and only parts identical to those specified
should be used.
WARNING TO SERVICE PERSONNEL:
This service manual is intended for use by persons having electrical and mechanical training and a level of
knowledge of these subjects generally considered acceptable in the appliance repair trade. Sharp Electronics
Corporation cannot be responsible, nor assume any liability, for injury or damage of any kind arising from the
use of this manual.
Microwave ovens contain circuitry capable of producing very high voltage and current. Contact with the
following parts may result in a severe, possibly fatal, electrical shock. (High Voltage Capacitor, High Voltage
Power Transformer, High Voltage Rectifier and Heat sink etc., and Magnetron, High Voltage Harness etc..)
BEFORE SERVICING ...................................................................................................... INSIDE FRONT COVER
WARNING TO SERVICE PERSONNEL ............................................................................................................... 1
FOREWORD AND WARNING ................................................................................................................................5
PRODUCT SPECIFICATIONS ............................................................................................................................... 6
POWER CONNECTION .........................................................................................................................................8
ANTI-TIP DEVICE ............................................................................................................................................... 10
CONTROL LAYOUT ............................................................................................................................................ 11
SCHEMATICS ..................................................................................................................................................... 12
TEST PROCEDURES .......................................................................................................................................... 17
TOUCH CONTROL PANEL ASSEMBLY ............................................................................................................. 28
WIRING DIAGRAMS ........................................................................................................................................... 47
PRINTED WIRING BOARDS ............................................................................................................................... 53
PARTS LIST ........................................................................................................................................................ 58
PACKING AND ACCESSORIES ......................................................................................................................... 69
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 MANUAL
FREE STANDING RANGE
WITH MICROWAVE DRAWER
MODELS
KB-3300JS pictured
TABLE OF CONTENTS
1
KB-3300JS
KB-3300JK
KB-3300JW
KB-3300JS
KB-3300JK
KB-3300JW
S74R243KB330J
Page
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