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Sharp R-120DB - User Manual

Sharp R-120DB
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R-120DB
R-120DK
R-120DR
R-120DW
MICROWAVE OVEN
R-120DB
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..)
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 ..............................................................................................................................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
S3007R120DPW/
MODELS
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.
HALF PINT
ON DEF L BS QTY CHECK
START/MINUTE LUS
STOP/CLEAR

Table of Contents

Questions and Answers

  • A
    Aaron LopezAug 16, 2025
    Why is my Sharp R-120DB not heating food properly?
    • R
      Raymond GordonAug 16, 2025
      If your Sharp Microwave Oven seems to be operating, but little or no heat is produced, the issue might be with the magnetron. You should check or replace the magnetron.
  • M
    Martin LopezAug 19, 2025
    Why is my Sharp Microwave Oven heating food unevenly?
    • M
      Michael ThompsonAug 19, 2025
      If your Sharp Microwave Oven goes into a cook cycle but produces extremely uneven heating, the high voltage capacitor might be the problem. Consider checking or replacing the high voltage capacitor.
  • J
    James KelleyAug 22, 2025
    Why is my Sharp R-120DB Microwave Oven not defrosting food well in EXPRESS DEFROST mode?
    • J
      Jasmine HoAug 22, 2025
      If your Sharp Microwave Oven goes into EXPRESS DEFROST but food is not defrosted well, the magnetron might be the issue. You should check or replace the magnetron.
  • M
    Mrs. Crystal BarryAug 26, 2025
    What to do if my Sharp R-120DB doesn't start cooking when I press START?
    • R
      rjonesAug 26, 2025
      If your Sharp Microwave Oven does not go into a cook cycle when the START pad is touched, you should check or replace the control unit or relay.
  • X
    xvanceAug 28, 2025
    Why is the display on my Sharp R-120DB not working when I press STOP/CLEAR?
    • C
      Charles LindseyAug 28, 2025
      If the display of your Sharp Microwave Oven does not operate properly when the STOP/CLEAR key is touched (the buzzer should sound and the time of day should appear in the display), you should check or replace the control unit or relay.
  • O
    owenstannerAug 31, 2025
    Why is the fan motor in my Sharp Microwave Oven not working?
    • M
      Melissa SmithAug 31, 2025
      If the fan motor in your Sharp Microwave Oven does not operate, but all other electric components function, you should check or replace the fan motor.
  • M
    Margaret CraigSep 3, 2025
    Why is the oven lamp not working in my Sharp R-120DB Microwave Oven?
    • S
      Sharon CruzSep 3, 2025
      If the oven lamp in your Sharp Microwave Oven does not light at all, but all other electric components function, you should check or replace the oven lamp or socket.
  • P
    Paul NelsonSep 6, 2025
    Why aren't the oven lamp, turntable motor, and fan motor working in my Sharp Microwave Oven?
    • C
      Chelsea JamesSep 6, 2025
      If the oven lamp, turntable motor, and fan motor do not operate in your Sharp Microwave Oven, you should check or replace the power transformer.
  • J
    Jason PetersonSep 9, 2025
    Why is the turntable motor in my Sharp R-120DB not working?
    • E
      emily94Sep 9, 2025
      If the turntable motor in your Sharp Microwave Oven does not operate, but all other electric components function, you should check or replace the turntable motor.
  • M
    mariareedSep 12, 2025
    What to do if my Sharp R-120DB C/T fuse blows when I open the door?
    • S
      Shawn ArmstrongSep 12, 2025
      If the C/T fuse blows when you open the door of your Sharp Microwave Oven, you should check or replace the monitor switch, primary interlock relay (RY2), door sensing switch, and secondary interlock switch.

Sharp R-120DB Specifications

General IconGeneral
Capacity1.5 cu. ft.
Control TypeTouch
TurntableYes
WeightApprox. 37 lbs.
CategoryMicrowave Oven
Turntable Diameter255 mm
Voltage230V
Frequency50Hz
Wattage800W
Power Output800 Watts

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