Sharp R-305EW, Service Manual

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R-305EW
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 con-
tain 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 Recti-
fier 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
TROUBLESHOOTING GUIDE .............................................................................................................................. 9
TEST PROCEDURE ............................................................................................................................................ 10
TOUCH CONTROL PANEL ................................................................................................................................. 18
COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE ................................................................ 22
PICTORIAL DIAGRAM ........................................................................................................................................ 28
POWER UNIT CIRCUIT ...................................................................................................................................... 29
CPU UNIT CIRCUIT ............................................................................................................................................ 30
PRINTED WIRING BOARD ................................................................................................................................. 31
PARTS LIST ........................................................................................................................................................ 32
PACKING AND ACCESSORIES ......................................................................................................................... 36
S2104R305EPW/
MICROWAVE OVEN
MODEL
R-305EW
SERVICE MANUAL
SHARP CORPORATION
This document has been published to be used for after
sales service only.
The contents are subject to change without notice.
POWER
LEVEL
TIMER
CLOCK
1
2 3
4 5
6
7
8
0
9
TO ADJUST QUANTITY TOUCH PAD AGAIN
1 GROUND MEAT
2 STEAKS/CHOPS
3 CHICKEN PIECES
STOP
CLEAR START
DEFOST COOK
NO.
LBS.
CUPS.
OZ.
MINUTE PLUS
INSTANT ACTION
COMPU
DEFROST
POPCORN
DINNER PLATE CASSEROLE
BAKED POTATOES
FRESH VEGETABLE GROUND MEAT
FROZEN ENTREES BEVERAGE
ROLLS / MUFFINS