1KB-5121KS/K/WWARNING TO SERVICE PERSONNEL:This service manual is intended for use by persons having electrical and mechanical training and a level ofknowledge of these subjects generally considered acceptable in the appliance repair trade. Sharp ElectronicsCorporation cannot be responsible, nor assume any liability, for injury or damage of any kind arising from theuse of this manual.Microwave ovens contain circuitry capable of producing very high voltage and current. Contact with the followingparts may result in a severe, possibly fatal, electrical shock. (High Voltage Capacitor, High Voltage PowerTransformer, High Voltage Rectifier and Heat sink etc., and Magnetron, High Voltage Harness etc..)S15R256KB5121KB-5121KSKB-5121KKKB-5121KWCOOK TOPWITHMICROWAVE DRAWERMODELSSERVICE MANUALTABLE OF CONTENTSPagePRECAUTIONS TO BE OBSERVED BEFORE AND DURING SERVICING TOAVOID POSSIBLE EXPOSURE TO EXCESSIVE MICROWAVE ENERGY ................... INSIDE FRONT COVERBEFORE SERVICING ...................................................................................................... INSIDE FRONT COVERWARNING TO SERVICE PERSONNEL ............................................................................................................... 1MICROWAVE MEASUREMENT PROCEDURE .....................................................................................................3FOREWORD AND WARNING ................................................................................................................................5PRODUCT SPECIFICATIONS ............................................................................................................................... 6POWER CONNECTION .........................................................................................................................................7ANTI-TIP DEVICE ................................................................................................................................................. 8CONTROL LAYOUT .............................................................................................................................................. 9SCHEMATICS ..................................................................................................................................................... 10TEST PROCEDURES .......................................................................................................................................... 13TOUCH CONTROL PANEL ASSEMBLY ............................................................................................................. 24COOK TOP/MICROWAVE DRAWER DISASSEMBLY ........................................................................................ 32WIRING DIAGRAMS ........................................................................................................................................... 39PRINTED WIRING BOARDS ............................................................................................................................... 44PARTS LIST ........................................................................................................................................................ 47PACKING AND ACCESSORIES ......................................................................................................................... 55This document has been published to be used for after sales service only. The contents are subject to change without notice.SHARP ELECTRONICS CORPORATIONKB-5121KS pictured