Table of Contents
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120DP(TXT)
ON DEF LBS
QTY CHECK
HALF
PINT
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 .............................................................................................................................. 8
TEST PROCEDURE ............................................................................................................................................ 10
TOUCH CONTROL PANEL ................................................................................................................................. 16
COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE ................................................................ 20
PICTORIAL DIAGRAM ........................................................................................................................................ 26
CONTROL PANEL CIRCUIT ............................................................................................................................... 27
PRINTED WIRING BOARD ................................................................................................................................. 28
PARTS LIST ........................................................................................................................................................ 29
PACKING AND ACCESSORIES ......................................................................................................................... 33
SHARP CORPORATION
http://dc136.4shared.com/doc/xqap_LFD/preview.html
START/MINUTE LUS
STOP/CLEAR
TABLE OF CONTENTS
SERVICE MANUAL
MICROWAVE OVEN
R-120DB
MODELS
R-120DK
R-120DR
R-120DW
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..)
This document has been published to be used for after
sales service only.
The contents are subject to change without notice.
Page 1 of 10
R-120DB
R-120DK
R-120DR
R-120DW
S3007R120DPW/
Page
3/25/2012
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Table of Contents
Troubleshooting
Related Manuals for Sharp R-120DB
Summary of Contents for Sharp R-120DB
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Page 1: Table Of Contents
120DP(TXT) Page 1 of 10 R-120DB R-120DK R-120DR R-120DW SERVICE MANUAL S3007R120DPW/ MICROWAVE OVEN R-120DB MODELS R-120DK START/MINUTE LUS STOP/CLEAR ON DEF LBS R-120DR QTY CHECK R-120DW HALF PINT 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. -
Page 2: Precautions To Be Observed Before And During Servicing To Avoid Possible Exposure To Excessive Microwave Energy
Before servicing an operative unit, perform a microwave emission check as per the Microwave Measurement Procedure outlined in this service manual. If microwave emissions level is in excess of the specified limit, contact SHARP ELECTRONICS CORPORATION immediately @1-800-237-4277. If the unit operates with the door open, service person should 1) tell the user not to operate the oven and 2) contact SHARP ELECTRONICS CORPORATION and Food and Drug Administration's Center for Devices and Radiological Health immediately. -
Page 3: Warning To Service Personnel
120DP(TXT) Page 3 of 10 R-120DB R-120DK R-120DR R-120DW WARNING TO SERVICE PERSONNEL Microwave ovens contain circuitry capable of pro- Don't Touch ! ducing very high voltage and current, contact with Danger High Voltage following parts may result in a severe, possibly fatal, electrical shock. -
Page 4: Microwave Measurement Procedure
120DP(TXT) Page 4 of 10 R-120DB R-120DK R-120DR R-120DW MICROWAVE MEASUREMENT PROCEDURE A. Requirements: 1) Microwave leakage limit (Power density limit): The power density of microwave radiation emitted by a microwave oven should not exceed 1mW/cm at any point 5cm or more from the external surface of the oven, measured prior to acquisition... -
Page 5: General Information
PRODUCT DESCRIPTION MICROWAVE OVEN R-120DB/ R-120DK/ R-120DR/ R-120DW GENERAL INFORMATION FOREWORD This Manual has been prepared to provide Sharp Electronics Corp. OPERATION Service Personnel with Operation and Service Information for the SHARP MICROWAVE OVEN, R-120DB, R-120DK, R-120DR, R- 120DW. TROUBLESHOOTING GUIDE AND... -
Page 6: Product Description
120DP(TXT) Page 6 of 10 R-120DB R-120DK R-120DR R-120DW PRODUCT DESCRIPTION SPECIFICATIONS ITEM DESCRIPTION Power Requirements 120 Volts 60 Hertz Single phase, 3 wire grounded Power Consumption 1030W / Approx. 9 Amperes Power Output 600 W nominal of RF microwave energy (IEC Test procedure) - Page 7 120DP(TXT) Page 7 of 10 R-120DB R-120DK R-120DR R-120DW Grounded Receptacle Box CAUTION: DO NOT UNDER ANY CIRCUMSTANCES CUT OR RE- MOVE THE ROUND GROUNDING PRONG FROM THIS 3-Pronged PLUG. Plug Grounding Pin 3-Pronged Receptacle OVEN DIAGRAM 1. Oven door with see-through window 2.
- Page 8 120DP(TXT) Page 8 of 10 R-120DB R-120DK R-120DR R-120DW OPERATION DESCRIPTION OF OPERATING SEQUENCE The following is a description of component functions during filament and the H.V. winding voltage is sent to a voltage oven operation. doubler circuit. 4. The microwave energy produced by the magnetron is...
- Page 9 120DP(TXT) Page 9 of 10 R-120DB R-120DK R-120DR R-120DW C/T FUSE MAGNETRON THERMAL CUT-OUT SCHEMATIC NOTE: CONDITION OF OVEN COM. POWER N.O. TRANSFORMER 1. DOOR OPENED. 2. COOKING TIME PROGRAMMED. 3. DOOR CLOSED. (RY-1) (RY-2) 4. START/MINUTE PLUS BUTTON PRIMARY...
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Page 10: Troubleshooting
120DP(TXT) Page 10 of 10 R-120DB R-120DK R-120DR R-120DW C/T FUSE air is channelled through the oven cavity to remove steam and vapours given off from the heating foods. It is then 1. The C/T fuse blows when the contacts (COM-NO) of the...